Wireless audio device, and method for removing noise of audio sound output through speaker in wireless audio device

Abstract

This wireless audio device may comprise: a speaker; a battery; an audio processing circuit; a current sensor connected to the battery; a memory storing instructions; and at least one processor, wherein the instructions, when executed individually or collectively by the at least one processor, cause the wireless audio device to: sense, through the current sensor, a current output from the battery on the basis of the speaker being enabled; convert the sensed current into a voltage; decode audio data provided from the at least one processor through the audio processing circuit to obtain a first audio data signal; obtain a second audio data signal for canceling noise generated through the speaker by a magnetic field generated by the current output from the battery by using the voltage through the audio processing circuit; and output the first audio data signal and the second audio data signal through the speaker via the audio processing circuit.

Description

Wireless audio device and a method for removing noise from audio sound output through a speaker in a wireless audio device

[0001] Various embodiments of the present disclosure relate to a method for removing noise from audio sound output through a speaker in a wireless audio device.

[0002] With the advancement of wireless communication technology, electronic devices can communicate with other electronic devices through various wireless communication technologies. Among these technologies, short-range wireless communication (NFC) technology enables electronic devices to connect with each other to exchange data or information and may include Bluetooth communication technology. Electronic devices can share data with each other at low power consumption by utilizing Bluetooth communication technology. By using this Bluetooth technology, external wireless communication devices can be connected, and audio data regarding content running on the electronic device can be transmitted to the external wireless communication device, which then processes the audio data and outputs it to the user. Recently, TWS (True Wireless Stereo) based wireless earphones have become widely used as wireless audio devices utilizing Bluetooth communication technology.

[0003] TWS-based wireless audio devices can be powered by a battery, convert audio data into an audio signal through an audio processing circuit, and output sound corresponding to the audio signal through a speaker.

[0004] In a wireless audio device, if a speaker is placed close to a battery (e.g., a coin cell battery), the magnetic field generated by the battery's current can affect the speaker's internal coil. If the magnetic field generated by the battery's current affects the speaker's internal coil during sound output through the speaker, a sound in which noise (N) is combined with the original sound (A) may be output.

[0005] For example, wireless audio devices may utilize battery power when outputting communication signals for wireless communication (e.g., beacon signals in Bluetooth communication), and as this power is utilized, current may flow along the internal jelly roll within the battery. This current flow from the battery can affect the coil of a speaker (e.g., voice coil) placed close to the battery, causing the speaker to vibrate. If the frequency of the current flow falls within the audible range, the vibration caused by the speaker can become noise audible to the user.

[0006] According to the embodiments of the present disclosure, noise generated by current flow from a battery during sound output through a speaker in a wireless audio device can be eliminated. The technical problems to be solved by the present disclosure are not limited to those mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present disclosure belongs.

[0007] A wireless audio device according to one embodiment of the present disclosure may include a speaker, a battery, an audio processing circuit, a current sensor connected to the battery, a memory for storing commands, and at least one processor. When executed individually or collectively by the at least one processor, the commands may cause the wireless audio device to sense a current output from the battery through the current sensor based on whether the speaker is enabled, and to convert the sensed current into a voltage. When executed individually or collectively by the at least one processor, the commands may cause the wireless audio device to decode audio data provided by the at least one processor through the audio processing circuit to obtain a first audio data signal. When executed individually or collectively by the at least one processor, the commands may cause the wireless audio device to obtain a second audio data signal through the audio processing circuit to cancel out noise generated through the speaker by a magnetic field generated by the current output from the battery using the voltage. When the above commands are executed individually or collectively by the at least one processor, the wireless audio device may mix the first audio data signal and the second audio data signal through the audio processing circuit and output the mixed first audio data signal and the second audio data signal through the speaker.

[0008] A method for removing noise from audio sound output through a speaker in a wireless audio device according to one embodiment of the present disclosure may include the operation of sensing a current output from a battery through a current sensor connected to a battery based on the speaker being enabled, and converting the sensed current into a voltage. The method may include the operation of obtaining a first audio data signal by decoding audio data provided from at least one processor through an audio processing circuit. The method may include the operation of obtaining a second audio data signal to cancel out noise generated through the speaker by a magnetic field generated by the current output from the battery using the voltage through the audio processing circuit. The method may include the operation of mixing the first audio data signal and the second audio data signal through the audio processing circuit. The method may include the operation of outputting the mixed first audio data signal and the second audio data signal through the speaker.

[0009] According to one embodiment of the present disclosure, in a non-transitory storage medium storing commands, the commands are configured to cause the wireless audio device to perform at least one operation when executed by the wireless audio device, wherein the at least one operation may include sensing a current output from a battery through a current sensor connected to a battery based on the speaker of the wireless audio device being enabled, and converting the sensed current into a voltage. The at least one operation may include decoding audio data provided by at least one processor of the wireless audio device through an audio processing circuit to obtain the first audio data signal. The at least one operation may include obtaining a second audio data signal through the audio processing circuit using the voltage to cancel out noise generated through the speaker by a magnetic field generated by the current. The at least one operation may include mixing the first audio data signal and the second audio data signal through the audio processing circuit. The above at least one operation may include the operation of outputting the first audio data signal and the second audio data signal mixed through the audio processing circuit through the speaker.

[0010] FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment.

[0011] FIG. 2 is a drawing showing an example of a wireless audio device according to one embodiment.

[0012] FIG. 3 is a block diagram of a wireless audio device according to one embodiment.

[0013] FIG. 4 is a diagram illustrating the configuration and operation of an audio processing circuit according to one embodiment.

[0014] FIG. 5 is a diagram showing a current sensor according to one embodiment.

[0015] FIG. 6 is a diagram showing a gain control circuit and a phase control circuit included in a second audio processing circuit according to one embodiment.

[0016] FIG. 7 is a flowchart illustrating the noise removal operation of audio sound output through a speaker in a wireless audio device according to one embodiment.

[0017] FIG. 8 is a drawing showing a wireless audio device including a tuning system according to one embodiment.

[0018] FIG. 9 is a flowchart illustrating a gain value determination operation using a tuning system in a wireless audio device according to one embodiment.

[0019] FIG. 10 is a diagram showing a case where a wireless audio device according to one embodiment uses an external tuning system.

[0020] Hereinafter, electronic devices according to various embodiments will be examined with reference to the attached drawings. In the various embodiments, the term "user" may refer to a person using the electronic device or a device using the electronic device (e.g., an artificial intelligence electronic device).

[0021] The terms used in this document are used merely to describe specific embodiments and are not intended to limit the scope of other embodiments. Singular expressions may include plural expressions unless the context clearly indicates otherwise. All terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art of the present invention. Terms defined in commonly used dictionaries may be interpreted as having the same or similar meaning as they have in the context of the relevant technology, and are not to be interpreted in an ideal or overly formal sense unless explicitly defined in this document. In some cases, even terms defined in this document shall not be interpreted to exclude embodiments of the present invention.

[0022] FIG. 1 is a block diagram of an electronic device (101) in a network environment (100) according to one embodiment.

[0023] Referring to FIG. 1, in a network environment (100), an electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or with at least one of an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through a server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0024] The processor (120) can control at least one other component (e.g., a hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., a program (140)), and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., a sensor module (176) or a communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., a central processing unit or an application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., a graphics processing unit, a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0025] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0026] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0027] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0028] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0029] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0030] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0031] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0032] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0033] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0034] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0035] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0036] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0037] The power management module (188) can manage power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0038] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0039] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0040] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the wireless communication module (192) can support a Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

[0041] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0042] According to one embodiment, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0043] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0044] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology. The electronic device according to one embodiment disclosed in this document may be a device of various forms. The electronic device may include, for example, a portable communication device (e.g., a smartphone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, a home appliance device, or an XR (extended reality) electronic device. The electronic device according to the embodiment of this document is not limited to the devices described above.

[0045] FIG. 2 is a drawing showing an example of a wireless audio device according to one embodiment.

[0046] Referring to FIG. 2, an electronic device (101) according to one embodiment (e.g., the electronic device (101) of FIG. 1) can transmit audio data to a wireless audio device (200) via short-range communication. The wireless audio device (200) (e.g., the electronic device (102) of FIG. 1) may be an electronic device capable of receiving and outputting audio data from the electronic device (101) (hereinafter also referred to as an "external electronic device"). According to one embodiment, the wireless audio device (200) may include audio output devices such as earphones, a headset, or a speaker configured in a pair. For example, the wireless audio device (200) may include a pair of electronic devices, such as a first wireless audio device (201) that can be worn on the user's right ear and a second wireless audio device (202) that can be worn on the user's left ear. For example, the first wireless audio device (201) and the second wireless audio device (202) each output sound wirelessly. It can be implemented as a left earphone and a right earphone. For example, the wireless audio device (200) can be implemented as true wireless stereo (TWS) based wireless earphones. Although wireless earphones have been described as examples in this disclosure, the wireless audio device (200) may be a headset, a Bluetooth speaker, or other wireless audio device capable of receiving and outputting audio data wirelessly.

[0047] Each of the first wireless audio device (201) and the second wireless audio device (202) according to one embodiment can form a communication link (e.g., a communication link using Bluetooth communication technology) with an external electronic device (101). Each of the first wireless audio device (201) and the second wireless audio device (202) can transmit and receive data related to sound with the external electronic device (101) through the communication link. Each of the first wireless audio device (201) and the second wireless audio device (202) according to one embodiment can convert data received from the external electronic device (101) into sound and output the converted sound (e.g., voice, music, ambient sound, notification sound, or telephone sound) through a speaker.

[0048] FIG. 3 is a block diagram of a wireless audio device according to one embodiment.

[0049] Referring to FIG. 3, a wireless audio device (301) according to one embodiment (e.g., the first wireless audio device (201) of FIG. 2 or the second wireless audio device (202) of FIG. 2) may include a processor (320), memory (330), audio processing circuit (370), speaker (355), current sensor (376), communication module (390), power management circuit (388), and / or battery (389). The wireless audio device (301) according to one embodiment is not limited thereto and may be configured to include various additional components or to exclude some of the above components. The wireless audio device (301) according to one embodiment may further include all or part of the electronic device (101) shown in FIG. 1.

[0050] A processor (320) according to one embodiment may include at least one processor circuit, such as an application processor (AP) or a central processing unit (CPU). A processor (320) according to one embodiment may be electrically or operationally connected to components included in a wireless audio device (301) (e.g., memory (330), audio processing circuit (370), speaker (355), current sensor (376), communication module (390), power management circuit (388), and / or battery (389)) and may perform overall control operations of the wireless audio device (301). A processor (320) according to one embodiment may execute commands stored in memory (330) individually or collectively to enable the electronic device (301) to perform a noise removal operation (or method) of audio sound output through a speaker in the wireless audio device (301) of the present disclosure.

[0051] A processor (320) according to one embodiment can perform wireless communication with an external electronic device (e.g., the electronic device (101) of FIG. 1) through a communication circuit (390). A processor (320) according to one embodiment can perform short-range communication with an external electronic device (101) through a communication circuit (390). A processor (320) according to one embodiment can receive audio data from an external electronic device (101) through short-range wireless communication with the external electronic device (101) using the communication circuit (390). Short-range communication may include, for example, at least one of WiFi (wireless fidelity), Bluetooth, IrDA, or NFC (near field communication). A processor (320) according to one embodiment can periodically output a Bluetooth beacon signal through the communication circuit (390).

[0052] A processor (320) according to one embodiment may transmit audio data to an audio processing circuit (370) and enable a speaker (355) in order to output an audio signal corresponding to the audio data (e.g., hereinafter also referred to as the 'first audio signal'). A processor (320) according to one embodiment may enable the audio processing circuit (370) and the speaker (355) to output the first audio signal, or enable the speaker (355) as the audio processing circuit (370) is enabled to output the first audio signal. Enable of the speaker (355) according to one embodiment may mean that the audio signal can be output through the speaker (355). According to one embodiment, the processor (320) can identify that an audio signal output from an audio processing circuit (370) (e.g., a first audio processing circuit (472) or a second audio processing circuit (474)) is applied to a speaker, thereby enabling the speaker (355).

[0053] A processor (320) according to one embodiment can identify the enable of a speaker (355) for outputting a first audio signal corresponding to audio data. A processor (320) according to one embodiment can sense the current output from the battery (389) through a current sensor (376). A processor (320) according to one embodiment can sense the current (or the current of the battery (389)) by detecting the current flowing between the battery (389) and the load (e.g., processor (320), communication circuit (390) and / or power management circuit (388)) through the current sensor (376). A processor (320) according to one embodiment can sense the current (or the current of the battery (389)) between the battery (389) and the load (or the current of the battery (389)) through the current sensor (376) when the speaker (355) is enabled and communication using the communication circuit (390) is performed. According to one embodiment, the current between the battery (389) and the load (or the current of the battery (389) (e.g., the flow of current formed by the jelly roll inside the battery (389)) can cause the speaker (355) to generate noise sound (or noise) through various operations within the wireless audio device (301) (e.g., output of a communication signal, or other operations). For example, if the speaker (255) in the wireless audio device (301) is placed close to the battery (389) (e.g., a coin cell battery), the magnetic field generated by the current of the battery (389) may affect the internal coil (351) of the speaker (355). If the magnetic field generated by the current of the battery (389) affects the internal coil (351) of the speaker (355) during sound output through the speaker (355), a sound in which noise is added to the original sound may be output. The magnetic field affecting the internal coil (351) of the speaker (355) can be proportional to the current, and the noise can be proportional to the amount of change in the current.For example, the wireless audio device (301) may utilize the power of the battery (389) when outputting a communication signal (e.g., a beacon signal during Bluetooth communication), and as the power of the battery (389) is utilized, a current flow may occur along the internal jelly roll in the battery (389). The current flow from the battery (389) may affect the coil (351) (e.g., voice coil) of the speaker (355) placed close to the battery (389), causing the speaker (351) to vibrate. If the frequency of the current flow corresponds to an audible frequency, the sound produced by the vibration of the speaker (355) may become a noise sound that can be heard by the user. A processor (320) according to one embodiment may convert the current sensed through the current sensor (376) into a voltage and transmit it to the audio processing circuit (370). A processor (320) according to one embodiment may obtain a first audio data signal by decoding the audio data through the audio processing circuit (370). A processor (320) according to one embodiment may obtain a second audio data signal to cancel out noise sound (or noise) generated in the speaker (355) by a magnetic field caused by current from the battery (389) using the voltage from the current sensor (376) through the audio processing circuit (370). The second audio data signal according to one embodiment may be a signal to cancel out noise sound (or noise) generated by a magnetic field caused by current flow from the battery (389) placed around the speaker (355). The second audio data signal may be applied to the speaker (355) through the audio processing circuit (370). The second audio data signal according to one embodiment may be a signal to cancel out noise sound (or noise) generated by a magnetic field caused by current flow from the battery (389) placed around the speaker (355) when a first sound corresponding to the first audio data is output through the speaker (355).According to one embodiment, the second audio data signal may be applied to the speaker (355) to cancel out noise sound (or noise) generated by a magnetic field caused by current flow from a battery (389) placed around the speaker (355), even when the first sound corresponding to the first audio data is not output through the speaker (355). According to one embodiment, the processor (320) may acquire the second audio data signal while acquiring (or during acquisition of) the first audio data signal. According to one embodiment, the processor (320) may mix the first audio data signal and the second audio data signal through an audio processing circuit (370), convert the mixed first audio data signal and the second audio data signal into an analog audio signal, amplify the analog audio signal, and output the amplified signal through the speaker (355).

[0054] A memory (330) according to one embodiment (e.g., memory (130) of FIG. 1) may include one or more storage media for storing instructions (e.g., instructions). A memory (330) according to one embodiment may store various data used for operations associated with at least one component of an electronic device (301) (e.g., processor (320), audio processing circuit (370), speaker (355), current sensor (376), communication module (390), power management circuit (388), and / or battery (389)). The data may include, for example, input data or output data for software (e.g., software module or program (140)) and related instructions. A memory (330) according to one embodiment may store instructions for performing operations of a wireless audio device (319) (or processor (320)).

[0055] A communication module (390) according to one embodiment (e.g., communication module (190) of FIG. 1) may support near-field wireless communication with an external electronic device (e.g., external electronic device (101) of FIG. 2 and / or a second wireless audio device (202)). A communication module (390) according to one embodiment may receive audio data (e.g., voice, music, ambient sound, notification sound, or phone sound) from an external electronic device (101) through communication with the external electronic device (101). According to one embodiment, near-field communication may include at least one of, for example, WiFi (wireless fidelity), Bluetooth, IrDA, or NFC (near field communication).

[0056] A power management circuit (388) according to one embodiment (e.g., power management module (188) of FIG. 1) can efficiently manage and optimize the power usage of a battery (389) within a wireless audio device (301). According to one embodiment, the power management circuit (388) can adjust the power supplied to each component (or part) of the wireless audio device (301) (e.g., processor (320), audio processing circuit (370), speaker (355), current sensor (376), and / or communication module (390)). A power management circuit (389) according to one embodiment may include a battery charging module. According to one embodiment, the power management circuit (389) can charge the battery (389) by receiving power from an external power supply device via wired or wireless connection.

[0057] A current sensor (376) according to one embodiment (e.g., sensor module (176) of FIG. 1) may be connected between the battery (389) and the load (or connected to the battery (389)) to sense (detect) current from the battery (389). A current sensor (376) according to one embodiment may convert the sensed current into a voltage and transmit it to an audio processing circuit (370). A current sensor (376) according to one embodiment may use a method using a current transformer and a method using a Hall element.

[0058] An audio processing circuit (370) according to one embodiment (e.g., an audio processing module (170) of FIG. 1) can process audio data and output a first audio data signal corresponding to the audio data. An audio processing circuit (370) according to one embodiment can output a second audio data signal to cancel out noise sound (or noise) generated in the speaker (355) by a magnetic field generated by the current from the battery (389) using the voltage from the current sensor (376). An audio processing circuit (370) according to one embodiment can mix the first audio data signal and the second audio data signal, convert the mixed first audio data signal and the second audio data signal into an analog audio signal, amplify the analog audio signal, and output the amplified audio signal through the speaker (355). An audio processing circuit (370) according to one embodiment may convert a first audio data signal into an analog audio signal, mix an analog audio signal corresponding to the first audio data signal with an analog audio signal corresponding to the second audio data signal, and amplify the mixed audio signal to output the amplified audio signal through a speaker (355). According to one embodiment, the second audio data signal (or an analog audio signal corresponding to the second audio data signal) may be a signal for canceling out noise sound (or noise) generated by a magnetic field caused by current flow from a battery (389) placed around the speaker (355) when the first audio data signal (or an analog audio signal corresponding to the second audio data signal) is output through the speaker (355).

[0059] A speaker (355) according to one embodiment (e.g., the acoustic output module (155) of FIG. 1) can generate sound corresponding to an audio signal output from an audio processing circuit (370) using an internal coil (351).

[0060] According to one embodiment, the wireless audio device (301) is not limited to the configuration shown in FIG. 3 and may further include various components. According to one embodiment, the wireless audio device (301) further includes an input module (not shown) (e.g., the input module (150) of FIG. 1) and the input module may receive various inputs associated with performing an operation to remove noise from audio sound output through the speaker of the present disclosure. According to one embodiment, the wireless audio device (301) may further include a display (e.g., the display module (160) of FIG. 1) (not shown). The display may be configured to provide various screen interfaces necessary for the operation of the wireless audio device (301). According to one embodiment, the display may provide a user interface regarding an operation to receive audio data from an external electronic device (101), an operation to play audio data received from the external electronic device (101), or an operation to remove noise from audio sound output through the speaker. For example, the display may include a light-emitting means such as an LED (light-emitting diode). For example, the light-emitting means may be controlled to emit a color corresponding to charging or charging completion. For example, when the wireless audio device (301) is in a state of communication connection with an external electronic device (101), the light-emitting means may be controlled to emit a specific color.

[0061] In one embodiment, the main components of the wireless audio device (301) of FIG. 3 were described. However, in various embodiments, not all components illustrated in FIG. 3 are essential components, and the connection relationships of the main components of the wireless audio device (301) described in FIG. 3 may be changed according to various embodiments.

[0062] FIG. 4 is a diagram illustrating the configuration and operation of an audio processing circuit according to one embodiment.

[0063] Referring to FIG. 4, an audio processing circuit (370) according to one embodiment may include a first audio processing circuit (472), a second audio processing circuit (474), a mixer (476), and an amplifier (478).

[0064] A first audio processing circuit (472) according to one embodiment may receive audio data (e.g., a) from a processor (320). A first audio processing circuit (472) according to one embodiment may include a digital audio interface (e.g., digital audio interface) for decoding audio data and an amplifier for amplifying and outputting a decoded first audio data signal. A first audio processing circuit (472) according to one embodiment may decode audio data (e.g., a) through a digital audio interface (not shown) to obtain a first audio data signal, and amplify the first audio data signal through an amplifier (not shown) to output it to a mixer (476).

[0065] A second audio processing circuit (474) according to one embodiment may receive a signal corresponding to a voltage corresponding to a current from a current sensor (376) from a battery (389). A second audio processing circuit (474) according to one embodiment may include a low pass filter (LPF) (not shown) that passes a designated band of the received signal, an analog-to-digital converter (ADC) (not shown) that converts the received analog signal into a digital signal, a gain control circuit (or amplifier) ​​that controls the size (or volume) of the received signal based on a designated gain value, and / or a phase control circuit that controls the phase of the amplified signal based on a designated phase value. A second audio processing circuit (474) according to one embodiment may remove distortion of the signal received from the current sensor (376) through the low pass filter. A signal received from the current sensor (376) may be converted into a digital signal through an analog-to-digital converter according to one embodiment. A second audio processing circuit (474) according to one embodiment can adjust the gain (e.g., proportionality factor) of a signal received from a current sensor (376) using a gain value (or gain adjustment value) (e.g., proportionality factor value) specified (or preset) through a gain control circuit. A second audio processing circuit (474) according to one embodiment can adjust the phase of the gain-adjusted signal using a phase value (or phase adjustment value) specified through a phase control circuit. A gain value and / or phase value according to one embodiment may be stored in a memory (330) or set in a gain control circuit and / or phase control circuit.According to one embodiment, the gain value may be specified as a value such that, after generating current through the battery (389) while outputting an audio signal through the speaker (355), a sound corresponding to the audio signal is acquired through a microphone (not shown), and the difference between the audio signal corresponding to the acquired sound and the output audio signal is less than a specified threshold value. According to one embodiment, the gain value may be acquired (and / or specified) using a tuning system (e.g., the tuning system (910) of FIG. 9) in the wireless audio device (301) or acquired (and / or specified) using an external tuning system (e.g., the tuning system (1110) of FIG. 11). According to one embodiment, the phase value may be specified to have a first phase value (e.g., 0 degrees) based on the first direction in which the coil (351) included in the speaker (355) is wound, or to have a second phase value (e.g., 180 degrees) based on the second direction in which the coil (351) is wound.

[0066] According to one embodiment, the second audio processing circuit (474) can convert a signal corresponding to the voltage received from the current sensor (376) into a digital signal, adjust the digital signal using a specified (or preset) gain value (or gain adjustment value), and adjust the phase of the gain-adjusted signal using a specified phase value (or phase adjustment value), and then transmit the second audio data signal to the mixer (476). According to one embodiment, the second audio processing circuit (474) may obtain a second audio data signal in an analog form by adjusting the gain and phase without converting the signal received from the current sensor (376) into a digital signal, and then transmit it to the mixer (476).

[0067] A mixer (476) according to one embodiment may include a digital signal processing circuit (e.g., a digital signal processor) including a digital mixer and a filter, and a digital-to-analog converter.

[0068] A mixer (476) according to one embodiment may mix the first audio data signal and the second audio data signal through a digital signal processing circuit when the first audio data signal and the second audio data signal are digital signals, and output the mixed first audio data signal and the second audio data signal. A mixer (476) according to one embodiment may include a digital-to-analog converter, or the digital-to-analog converter may be located between the mixer (476) and the amplifier (478). The digital-to-analog converter may convert the mixed first audio data signal and the second audio data signal into an analog audio signal. An amplifier (478) according to one embodiment may output the converted audio signal to a speaker (355).

[0069] A mixer (476) according to one embodiment may include a digital mixer and a filter and may not include a digital-to-analog converter. According to one embodiment, a first audio processing circuit (472) may output a first audio data signal as an analog signal and may output a second audio data signal as an analog signal. A mixer (476) according to one embodiment may mix an analog signal corresponding to the first audio data signal and an analog signal corresponding to the second audio data signal, and transmit the mixed signal to an amplifier (478).

[0070] A processor (330) according to one embodiment may, when enabling a speaker (355) to output audio data (a), mix a first audio data signal obtained through a first audio processing circuit (472) and a second audio data signal obtained through a second audio processing circuit (474) through a mixer (474), convert them into analog audio signals, and then amplify them through an amplifier (478) to output them through a speaker (355). A speaker (355) according to one embodiment may receive audio signals corresponding to the mixed first audio data signal and the second audio data signal, and output a first sound (A) corresponding to the first audio data signal, a noise cancellation sound (C) corresponding to the second audio data signal, and a noise sound (or noise) (N). When a first audio data signal corresponding to audio data (a) is output through a speaker (355), the noise sound (or noise) (N) is removed by a noise cancellation sound (C), so that the user can hear the first sound (A) corresponding to the first audio data signal without noise.

[0071] FIG. 5 is a diagram showing a current sensor according to one embodiment.

[0072] Referring to FIG. 5, a current sensor (376) according to one embodiment may be connected between both ends of a battery (389) (e.g., coin battery) and a second audio processing circuit (e.g., the second audio processing circuit (474) of FIG. 4). A current sensor (376) according to one embodiment may include a resistor (Rsense) (520), an OP AMP (530), and at least one resistor (R1, R2) connected to a current path from the battery (389) to the load (510). A current sensor (376) according to one embodiment may output a voltage (Vout) corresponding to the current from the battery (389) to the load (510) to the second audio processing circuit (474). The value of the voltage (Vout) corresponding to the current from the battery (389) to the load (510) according to one embodiment may be equal to Equation 1 below.

[0073]

[0074] Referring to the above mathematical formula 1, the current sensor (376) according to one embodiment can output a voltage value (Vout) to the second audio processing circuit (474), which is the product of a resistance value (Rsense), a value of current flowing through the load (Iload), and at least one internal resistance value (sum of R1 / sum of R2). For example, when the internal resistance value of the battery (389) is 0.4 ohm, the value of current flowing through the load (Iload) may be several tens of mA, and a resistance (Rsense) of a size of about 0.1 to 0.01 ohm may be used.

[0075] FIG. 6 is a diagram showing a gain control circuit and a phase control circuit included in a second audio processing circuit according to one embodiment.

[0076] Referring to FIG. 6, a second audio processing circuit according to one embodiment (e.g., the second audio processing circuit of FIG. 4 (474)) may include a gain control circuit (622) and a phase control circuit (624).

[0077] A gain control circuit (622) according to one embodiment can adjust the gain (e.g., proportionality coefficient) of a signal received from a current sensor (376) using a specified (or preset) gain value (or gain adjustment value) (e.g., proportionality coefficient value). A gain control circuit (622) according to one embodiment may include an amplifier to which the gain value is adjusted. A gain value according to one embodiment may be stored in a memory (330) or set in a gain control circuit (622). A gain value according to one embodiment may be specified as a value such that, after generating current through a battery (389) while outputting an audio signal through a speaker (355), a sound corresponding to the audio signal is acquired through a microphone (not shown), and the difference between the audio signal corresponding to the acquired sound and the output audio signal is less than a specified threshold value. A gain value according to one embodiment may be obtained (and / or specified) using a tuning system (e.g., the tuning system (910) of FIG. 9) in a wireless audio device (301) or obtained (and / or specified) using an external tuning system (e.g., the tuning system (1110) of FIG. 11).

[0078] A phase control circuit (624) according to one embodiment can control the phase of the gain-controlled signal using a designated phase value (or phase control value). A phase value according to one embodiment may be stored in a memory (330) or set in the control circuit (624). A phase value according to one embodiment may be designated to have a first phase value (e.g., 0 degrees) based on the first direction in which the coil (351) included in the speaker (355) is wound, or a second phase value (e.g., 180 degrees) based on the second direction in which the coil (351) is wound.

[0079] A wireless audio device (101, 201, 202, 301) according to one embodiment of the present disclosure may include a speaker (155 or 355), a battery (189 or 389), an audio processing circuit (170 or 370), a current sensor (176 or 376) connected to the battery, a memory (130 or 330) for storing commands, and at least one processor (120 or 320). When executed individually or collectively by the at least one processor, the commands may cause the wireless audio device to sense a current output from the battery through the current sensor based on the speaker being enabled, and to convert the sensed current into a voltage. When executed individually or collectively by the at least one processor, the commands may cause the wireless audio device to decode audio data provided from the at least one processor through the audio processing circuit to obtain a first audio data signal. When the above commands are executed individually or collectively by the at least one processor, the wireless audio device may acquire a second audio data signal to cancel out noise generated through the speaker by the magnetic field generated by the current output from the battery using the voltage through the audio processing circuit. When the above commands are executed individually or collectively by the at least one processor, the wireless audio device may mix the first audio data signal and the second audio data signal through the audio processing circuit and output the mixed first audio data signal and the second audio data signal through the speaker.

[0080] According to one embodiment, the wireless audio device may further include a communication circuit (190 or 390). When the commands are executed individually or collectively by the at least one processor, the wireless audio device may enable the speaker and sense the current through the current sensor when communicating through the communication circuit.

[0081] According to one embodiment, the communication circuit may include a Bluetooth communication circuit. When the commands are executed individually or collectively by the at least one processor, the wireless audio device may sense the current through the current sensor when the speaker is enabled and a periodic Bluetooth beacon signal is transmitted through the Bluetooth communication circuit.

[0082] According to one embodiment, the audio processing circuit may include a first audio processing circuit that decodes the audio data to obtain the first audio data signal and amplifies and outputs the decoded first audio data signal. The audio processing circuit may include a second audio processing circuit that adjusts the gain and phase of a signal corresponding to the voltage to output a second audio data signal. The audio processing circuit may include a mixer that mixes the first audio data signal and the second audio data signal. The audio processing circuit may include a digital-to-analog converter that converts the mixed first audio data signal and the second audio data signal into an analog audio signal. The audio processing circuit may include an amplifier that amplifies the analog audio signal and outputs it to the speaker.

[0083] The second audio processing circuit according to one embodiment may include a gain control circuit that controls the gain of a signal corresponding to the voltage using a specified gain value. The second audio processing circuit may include a phase control circuit that controls the phase of a signal corresponding to the voltage using a specified phase value.

[0084] According to one embodiment, the memory can store the specified gain value.

[0085] The above commands according to one embodiment, when executed individually or collectively by the at least one processor, can cause the electronic device to set the specified gain value stored in memory at the time of booting the wireless audio device to the gain control circuit.

[0086] According to one embodiment, the specified phase value may have a first phase value based on a first direction in which the coil included in the speaker is wound, or a second phase value based on a second direction in which the coil is wound that is different from the first direction.

[0087] According to one embodiment, the wireless audio device may further include a microphone and a tuning system. When executed individually or collectively by the at least one processor, the commands may cause the electronic device to generate the current of the battery. When executed individually or collectively by the at least one processor, the commands may cause the electronic device to record noise generated through the speaker by the magnetic field of the current using the microphone. When executed individually or collectively by the at least one processor, the commands may cause the electronic device to determine the gain value of the gain control circuit using the tuning system so that the volume of the noise becomes below a specified threshold value.

[0088] The above commands according to one embodiment, when executed individually or collectively by the at least one processor, may cause the electronic device to store the determined gain value as the specified gain value in the memory.

[0089] FIG. 7 is a flowchart illustrating the noise removal operation of audio sound output through a speaker in a wireless audio device according to one embodiment.

[0090] Referring to FIG. 7, a processor (e.g., processor (120) of FIG. 1, processor (320) of FIG. 3) of a wireless audio device (301) according to one embodiment (e.g., electronic device (101) of FIG. 1, first wireless audio device (201) of FIG. 2, second wireless audio device (202) of FIG. 2, or wireless audio device (301) of FIG. 3) can perform at least one of 710 operations to 750 operations.

[0091] In operation 710, a processor (320) according to one embodiment may identify the enable of a speaker (355) for outputting a first audio signal corresponding to audio data. A processor (320) according to one embodiment may transmit audio data to an audio processing circuit (370) to output a first audio signal corresponding to audio data and enable the speaker (355). A processor (320) according to one embodiment may enable the audio processing circuit (370) and the speaker (355) to output the first audio signal, or enable the speaker (355) as the audio processing circuit (370) is enabled to output the first audio signal. In one embodiment, the enable of the speaker (355) may mean that the audio signal can be output through the speaker (355).

[0092] In operation 720, a processor (320) according to one embodiment can sense the current of the battery (389) through a current sensor (376) and convert the sensed current into a voltage. A speaker (355) can be enabled in an electronic device (101) according to one embodiment, and communication can be performed using a communication circuit (390). A processor (320) according to one embodiment can sense the current output from the battery (389) through the current sensor (376) (or the current between the battery (389) and the load (e.g., the flow of current formed by the jelly roll inside the battery (389)). The current output from the battery (389) according to one embodiment can cause the speaker (355) to generate noise sound (or noise) by various operations (e.g., output of a communication signal, or other operations) within the wireless audio device (301). For example, if a speaker (255) in a wireless audio device (301) is placed close to a battery (389) (e.g., a coin cell battery), a magnetic field generated by the current of the battery (389) may affect the internal coil (351) of the speaker (355). If the magnetic field generated by the current output from the battery (389) during sound output through the speaker (355) affects the internal coil (351) of the speaker (355), a noise sound may be output, or a sound in which noise is added to the original sound may be output. The magnetic field affecting the internal coil (351) of the speaker (355) may be proportional to the current, and the noise may be proportional to the amount of change in the current. For example, the wireless audio device (301) can use the power of the battery (389) when outputting a communication signal (e.g., a beacon signal during Bluetooth communication), and as the power of the battery (389) is used, a current flow may occur along the internal jelly roll in the battery (389).The current flow from the battery (389) can affect the coil (351) (e.g., voice coil) of the speaker (355) placed close to the battery (389), causing the speaker (355) to vibrate. If the frequency of the current flow corresponds to an audible frequency, the sound produced by the vibration of the speaker (355) can become a noise sound (or noise) that can be heard by the user. A processor (320) according to one embodiment can convert the current sensed through the current sensor (376) into a voltage and transmit it to the audio processing circuit (370).

[0093] In operation 730, a processor (320) according to one embodiment may obtain a first audio data signal by decoding audio data through an audio processing circuit (370). A processor (320) according to one embodiment may transmit audio data (e.g., a) to a first audio processing circuit (e.g., the first audio processing circuit (472) of FIG. 4). A first audio processing circuit (472) according to one embodiment may include a digital audio interface (e.g., digital audio interface) for decoding audio data and an amplifier for amplifying and outputting the decoded first audio data signal. A first audio processing circuit (472) according to one embodiment may obtain a first audio data signal by decoding audio data (e.g., a) through a digital audio interface (not shown) and amplify and output the first audio data signal through an amplifier (not shown). A first audio processing circuit (472) according to one embodiment may output a first audio data signal as a digital signal or convert the first audio data signal into an analog signal and output an analog signal corresponding to the first audio data signal.

[0094] In operation 740, a processor (320) according to one embodiment may obtain a second audio data signal to cancel out noise sound (or noise) generated in the speaker (355) by a magnetic field caused by current output from the battery (389) through an audio processing circuit (370) using voltage from a current sensor (376). The second audio data signal according to one embodiment may be a signal to cancel out noise sound (or noise) generated by a magnetic field caused by current flow from the battery (389) placed around the speaker (355) when a first sound corresponding to the first audio data is output through the speaker (355). The second audio data signal according to one embodiment may be applied to the speaker (355) to cancel out noise sound (or noise) generated by a magnetic field caused by current flow from the battery (389) placed around the speaker (355) even when the first sound corresponding to the first audio data is not output through the speaker (355). A processor (320) according to one embodiment may acquire a second audio data signal while acquiring (or during acquisition of) a first audio data signal. A second audio processing circuit (474) according to one embodiment may output the second audio data signal as a digital signal or convert the second audio data signal into an analog signal and output an analog signal corresponding to the second audio data signal.

[0095] A processor (320) according to one embodiment may acquire a second audio data signal through a second audio processing circuit (e.g., the second audio processing circuit (474) of FIG. 4) of an audio processing circuit (370). Under the control of the processor (320) according to one embodiment, the second audio processing circuit (474) may receive a signal corresponding to the acquired voltage by sensing the current output from the battery (389) from the current sensor (376). The second audio processing circuit (474) according to one embodiment may include a low pass filter (LPF) (not shown) that passes a designated band of the received signal, a digital to analog converter (DAC) (not shown) that converts the received signal into an analog signal, a gain control circuit (or amplifier) ​​that controls the magnitude of the received signal based on a designated gain value, and / or a phase control circuit that controls the phase of the amplified signal based on a designated phase value. A second audio processing circuit (474) according to one embodiment can remove distortion of a received signal through a low-pass filter. A second audio processing circuit (474) according to one embodiment can convert a received signal into an analog signal through a digital-to-analog converter. A second audio processing circuit (474) according to one embodiment can adjust the gain (e.g., proportionality factor) of the received signal using a gain value (or gain adjustment value) (e.g., proportionality factor value) specified (or preset) through a gain control circuit. A second audio processing circuit (474) according to one embodiment can adjust the phase of the gain-adjusted signal using a phase value (or phase adjustment value) specified through a phase control circuit. A gain value and / or phase value according to one embodiment may be stored in a memory (330) or set in a gain control circuit and / or phase control circuit.

[0096] In operation 750, a processor (320) according to one embodiment may mix a first audio data signal and a second audio data signal through an audio processing circuit (370) and output the mixed first audio data signal and the second audio data signal through a speaker (355). In one embodiment, if the first audio data signal and the second audio data signal are each digital signals, the processor (320) may mix the first audio data signal and the second audio data signal through a mixer (e.g., mixer (476) of FIG. 4) of the audio processing circuit (370), convert the mixed first audio data signal and the second audio data signal into analog audio signals, and transmit them to an amplifier (e.g., amplifier (478) of FIG. 4). A processor (320) according to one embodiment can mix the first audio data signal and the second audio data signal when the first audio data signal and the second audio data signal are each analog signals, and can transmit the mixed first audio data signal and the second audio data signal to an amplifier (e.g., amplifier (478) of FIG. 4). A processor (320) according to one embodiment can amplify the mixed first audio data signal and the second audio data signal through the amplifier (e.g., amplifier (478) of FIG. 4) of the audio processing circuit (370) and output the amplified signal through a speaker (355).

[0097] A method for removing noise from audio sound output through a speaker (155 or 355) in a wireless audio device (101, 201, 202, or 301) according to one embodiment of the present disclosure may include the operation of sensing a current output from a battery through a current sensor (176 or 376) connected to a battery (189 or 389) based on the speaker being enabled, and converting the sensed current into a voltage. The method may include the operation of obtaining a first audio data signal by decoding audio data provided from the at least one processor through an audio processing circuit (170 or 370). The method may include the operation of obtaining a second audio data signal to cancel out noise generated through the speaker by a magnetic field generated by the current output from the battery using the voltage through the audio processing circuit. The method may include the operation of mixing the first audio data signal and the second audio data signal through the audio processing circuit. The above method may include the operation of outputting the first audio data signal and the second audio data signal mixed through the audio processing circuit through the speaker.

[0098] The method according to one embodiment may include the operation of sensing the current through the current sensor when the speaker is enabled and communication is made through the communication circuit of the wireless audio device.

[0099] In the method according to one embodiment, the communication circuit includes a Bluetooth communication circuit, and the method may include the operation of sensing the current through the current sensor when the speaker is enabled and a periodic Bluetooth beacon signal is transmitted through the Bluetooth communication circuit.

[0100] In the method according to one embodiment, the audio processing circuit may include a first audio processing circuit, a second audio processing circuit, a mixer, an analog-to-digital converter, and an amplifier. The method may include an operation of decoding the audio data through the first audio processing circuit and amplifying and outputting the decoded first audio data signal. The method may include an operation of adjusting the gain and phase of a signal corresponding to the voltage through the second audio processing circuit and outputting a second audio data signal. The method may include an operation of mixing the first audio data signal and the second audio data signal through the mixer. The method may include an operation of converting the mixed first audio data signal and the second audio data signal into an analog audio signal through the digital-to-analog converter. The method may include an operation of amplifying the analog audio signal through the amplifier and outputting it to the speaker.

[0101] In the method according to one embodiment, the second audio processing circuit may include a gain control circuit and a phase control circuit. The method may include an operation of controlling the gain of a signal corresponding to the voltage using a gain value specified through the gain control circuit. The method may include an operation of controlling the phase of a signal corresponding to the gain-controlled voltage using a phase value specified through the phase control circuit.

[0102] The method according to one embodiment may include the operation of storing the specified gain value in the memory of the wireless audio device.

[0103] The method according to one embodiment may include the operation of setting the specified gain value stored in memory to the gain control circuit when the wireless audio device boots up.

[0104] In the method according to one embodiment, the specified phase value may have a first phase value based on a first direction in which the coil included in the speaker is wound, or a second phase value based on a second direction different from the first direction in which the coil is wound.

[0105] In the method according to one embodiment, the wireless audio device may further include a microphone and a tuning system. The method may include an operation of generating the current of the battery. The method may include an operation of recording noise generated through the speaker by the magnetic field produced by the current using the microphone. The method may include an operation of determining the gain value of the gain control circuit using the tuning system so that the volume of the noise becomes below a specified threshold value.

[0106] FIG. 8 is a drawing showing a wireless audio device including a tuning system according to one embodiment.

[0107] Referring to FIG. 8, a wireless audio device (801) according to one embodiment (e.g., the first wireless audio device (201) of FIG. 2, the second wireless audio device (202) of FIG. 2, or the wireless audio device (301) of FIG. 3) may include a processor (820), memory (830), audio processing circuit (870), speaker (855), current sensor (876), communication module (890), power management circuit (888), battery (889), microphone (850), and / or tuning system (810). Each of the processor (820), memory (830), audio processing circuit (870), speaker (855), current sensor (876), communication module (890), power management circuit (888), and battery (889) according to one embodiment can perform substantially the same operation as the processor (320), memory (330), audio processing circuit (370), speaker (355), current sensor (376), communication module (390), power management circuit (388), and battery (389) of FIG. 3, and the description of the same operation is omitted and the additional operation is described.

[0108] A processor (820) according to one embodiment can enable a speaker (855), set a gain value for a second audio processing circuit (e.g., a gain control circuit (622) in FIG. 6) within the second audio processing circuit (374) of FIG. 3, and generate current from a battery (889). A processor (820) according to one embodiment can generate current from a battery (889) by outputting a periodic communication signal (e.g., a Bluetooth beacon signal through a Bluetooth communication circuit) through a communication circuit (890). The coil of the speaker (855) (e.g., a coil (351) in FIG. 3)) vibrates due to the magnetic field generated by the current from the battery (889), and noise sound (or noise) may be generated from the speaker (855).

[0109] A processor (820) according to one embodiment can record (or acquire) noise sound (or noise) generated from a speaker (855) through a microphone (950).

[0110] A processor (820) according to one embodiment may determine the gain value of a gain control circuit (622) within a second audio processing circuit (374) of an audio processing unit (870) by measuring the magnitude (or volume) value of a recorded noise sound (or noise) using a tuning system (810) and comparing the measured noise sound magnitude (or volume) value with a specified threshold (or allowable value). If the noise sound magnitude (or volume) value recorded using the tuning system (810) is greater than or equal to a specified threshold (or allowable value), the processor (820) may adjust the gain value of the gain control circuit (622), record the noise sound generated from the speaker (855), and repeat the process of comparing the recorded noise sound magnitude (or volume) value with the specified threshold (or allowable value). A processor (820) according to one embodiment may use a tuning system (810) to record noise sound generated from a speaker (855) until the recorded noise sound size (or volume) value becomes less than or equal to a specified threshold (or allowable value), and may repeat the process of comparing the recorded noise sound size (or volume) value with the specified threshold (or allowable value). A processor (820) according to one embodiment may determine the gain value when the recorded noise sound size (or volume) value becomes less than or equal to the specified threshold (or allowable value) and may store the determined gain value in memory (830). Gain adjustment may be performed based on a specified rule. A processor (820) according to one embodiment may set the gain value of the gain adjustment circuit (622) in the second audio processing circuit (374) by referring to the gain value stored in memory (830) every time the system boots.

[0111] FIG. 9 is a flowchart illustrating a gain value determination operation using a tuning system in a wireless audio device according to one embodiment.

[0112] Referring to FIG. 9, a processor (e.g., processor (120) of FIG. 1, processor (320) of FIG. 3, or processor (820) of FIG. 8) of a wireless audio device (801) according to one embodiment (e.g., electronic device (101) of FIG. 1, first wireless audio device (201) of FIG. 2, second wireless audio device (202) of FIG. 2, or wireless audio device (301) of FIG. 3) can perform at least one of 910 operations to 940 operations.

[0113] In operation 910, the processor (820) according to one embodiment may specify a gain value of the gain control circuit (e.g., the gain control circuit (622) of FIG. 6) within the second audio processing circuit (374) of FIG. 3 of the audio processing unit (870) and generate current from the battery (889). The processor (820) according to one embodiment may generate current from the battery (889) by outputting a periodic communication signal (e.g., a Bluetooth beacon signal through a Bluetooth communication circuit) through the communication circuit (890). The coil of the speaker (855) (e.g., the coil (351) of FIG. 3)) may vibrate due to the magnetic field generated by the current from the battery (889), and noise sound (or noise) may be generated from the speaker (855).

[0114] In operation 920, the processor (820) according to one embodiment can record (or acquire) noise sound generated from the speaker (855) through the microphone (950).

[0115] In operation 930, a processor (820) according to one embodiment may determine the gain value of a gain control circuit (622) within a second audio processing circuit (374) of an audio processing unit (870) by measuring the magnitude (or volume) value of a recorded noise sound using a tuning system (810) and comparing the measured noise sound magnitude (or volume) value with a specified threshold (or allowable value). If the noise sound magnitude (or volume) value recorded using the tuning system (810) is greater than or equal to a specified threshold (or allowable value), the processor (820) may adjust the gain value of the gain control circuit (622), record the noise sound generated from the speaker (855), and repeat the process of comparing the recorded noise sound magnitude (or volume) value with the specified threshold (or allowable value). Gain control may be performed based on a specified rule. A processor (820) according to one embodiment may use a tuning system (810) to record noise sound generated from a speaker (855) until the recorded noise sound size (or volume) value becomes less than or equal to a specified threshold (or allowable value), and may repeat the process of comparing the recorded noise sound size (or volume) value with the specified threshold (or allowable value). A processor (820) according to one embodiment may determine the gain value when the recorded noise sound size (or volume) value becomes less than or equal to the specified threshold (or allowable value).

[0116] In operation 940, the processor (820) according to one embodiment may store a determined gain value in memory (830). The processor (820) according to one embodiment may set the gain value of the gain control circuit (622) in the second audio processing circuit (374) by referring to the gain value stored in memory (830) each time it boots.

[0117] FIG. 10 is a diagram showing a case where a wireless audio device according to one embodiment uses an external tuning system.

[0118] Referring to FIG. 10, a wireless audio device (1001) according to one embodiment (e.g., the first wireless audio device (201) of FIG. 2, the second wireless audio device (202) of FIG. 2, the wireless audio device (301) of FIG. 3, or the wireless audio device (801) of FIG. 8) includes a processor (1020), memory (1030), audio processing circuit (1070), speaker (1055), current sensor (1076), communication module (1090), power management circuit (1088), and / or battery (1089), and can be coupled with an external microphone (1050) and / or an external tuning system (1010). Each of the processor (1020), memory (1030), audio processing circuit (1070), speaker (1055), current sensor (1076), communication module (1090), power management circuit (1088), and battery (1089) according to one embodiment can perform substantially the same operation as the processor (320), memory (330), audio processing circuit (370), speaker (355), current sensor (376), communication module (390), power management circuit (388), and battery (389) of FIG. 3, and the description of the same operation is omitted and the additional operation is described.

[0119] A tuning system (1010) according to one embodiment can enable a speaker (1055), set a gain value for a second audio processing circuit (e.g., a gain control circuit (622) in FIG. 6) within the second audio processing circuit (474) of FIG. 4, and generate current from a battery (1089). A tuning system (1010) according to one embodiment can output a periodic communication signal (e.g., a Bluetooth beacon signal through a Bluetooth communication circuit) through a communication circuit (1090) to generate current from a battery (1089) through the periodic communication signal output. Due to the magnetic field generated by the current from the battery (1089), the coil of the speaker (1055) (e.g., the coil (351) in FIG. 3)) vibrates, and noise sound (or noise) may be generated from the speaker (1055).

[0120] A tuning system (1010) according to one embodiment can record (or acquire) noise sound generated from a speaker (1055) through a microphone (1050).

[0121] A tuning system (1010) according to one embodiment can determine the gain value of a gain control circuit (622) within a second audio processing circuit (474) of an audio processing unit (1070) by measuring the magnitude (or volume) value of a recorded noise sound and comparing the measured noise sound magnitude (or volume) value with a specified threshold (or allowable value). If the recorded noise sound magnitude (or volume) value is greater than or equal to the specified threshold (or allowable value), the tuning system (1010) can adjust the gain value of the gain control circuit (622), record the noise sound generated from the speaker (1055), and repeat the process of comparing the recorded noise sound magnitude (or volume) value with the specified threshold (or allowable value). A tuning system (1010) according to one embodiment may repeat the process of recording noise sound generated from a speaker (1055) until the recorded noise sound size (or volume) value becomes less than or equal to a specified threshold (or allowable value) and comparing the recorded noise sound size (or volume) value with the specified threshold (or allowable value). A tuning system (1010) according to one embodiment may determine the gain value when the recorded noise sound size (or volume) value becomes less than or equal to the specified threshold (or allowable value) and store the determined gain value in memory (1030). Gain adjustment may be performed based on a specified rule. A processor (1020) according to one embodiment may set the gain value of a gain adjustment circuit (622) within a second audio processing circuit (474) by referring to the gain value stored in memory (1030) every time the system boots.

[0122] One embodiment of this document and the terms used therein are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, each of phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may include any one of the items listed together in the corresponding phrase, or all possible combinations thereof. Terms such as “first,” “second,” or “first” or “second” may be used simply to distinguish a component from another component and do not limit the components in any other aspect (e.g., importance or order). Where any (e.g., first) component is referred to as “coupled” or “connected” to another (e.g., second) component, with or without the terms “functionally” or “communicationally,” it means that said component may be connected to said other component directly (e.g., wired), wirelessly, or through a third component.

[0123] The term "module" as used in an embodiment of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to an embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0124] One embodiment of the present document may be implemented as software (e.g., program (140)) comprising one or more instructions stored in a storage medium (e.g., internal memory (136) or external memory (138)) readable by a machine (e.g., electronic device (101) or wireless audio device (201, 202, 301, 801, or 1001)). For example, a processor (e.g., processor (120, 320, 820, or 1020)) of the machine (e.g., electronic device (101) or wireless audio device (201, 202, 301, 801, or 1001)) may call at least one of the one or more instructions stored from the storage medium and execute it. This enables the machine to be operated to perform at least one function according to the at least one called instruction. One or more of the above instructions may include code generated by a compiler or code that can be executed by an interpreter. A device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and this term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily in the storage medium.

[0125] In a non-transient storage medium storing commands according to one embodiment of the present disclosure, the commands are configured to cause the wireless audio device (101, 201, 202, 301, 801, or 1001) to perform at least one operation when executed by the wireless audio device, wherein the at least one operation may include sensing a current output from a battery through a current sensor (176 or 376) connected to a battery (189 or 389) based on the speaker (155 or 355) of the wireless audio device being enabled, and converting the sensed current into a voltage. The at least one operation may include decoding audio data provided by at least one processor of the wireless audio device through an audio processing circuit (170 or 370) to obtain the first audio data signal. The at least one operation may include an operation of acquiring a second audio data signal to cancel out noise generated through the speaker by a magnetic field generated by the current using the voltage through the audio processing circuit. The at least one operation may include an operation of mixing the first audio data signal and the second audio data signal through the audio processing circuit. The at least one operation may include an operation of outputting the mixed first audio data signal and the second audio data signal through the speaker.

[0126] According to one embodiment, the method according to one embodiment disclosed herein may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created on a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0127] According to one embodiment, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to one embodiment, one or more of the components or operations among the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to integration. According to one embodiment, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In a wireless audio device (101, 201, 202, 301), Speaker(155, 355); Battery(189, 389); Audio processing circuit (170, 370); Current sensor (176, 376) connected to the battery above; Memory for storing commands (130, 330); and It includes at least one processor (120, 320), and When the above commands are executed individually or collectively by the at least one processor, the wireless audio device, Based on the fact that the above speaker is enabled, the current output from the battery is sensed through the above current sensor, and the sensed current is converted into voltage, and A first audio data signal is obtained by decoding audio data provided from at least one processor through the above audio processing circuit, and Acquiring a second audio data signal to cancel out noise generated through the speaker by the magnetic field generated by the current output from the battery using the voltage through the above audio processing circuit, and A wireless audio device that outputs the first audio data signal and / or the second audio data signal through the speaker via the audio processing circuit.

2. In Paragraph 1, It further includes a communication circuit, When the above commands are executed individually or collectively by the at least one processor, the wireless audio device, A wireless audio device that enables the above speaker and senses the current through the above current sensor when communicating through the above communication circuit.

3. In Paragraph 1 or 2, The above communication circuit includes a Bluetooth communication circuit, and When the above commands are executed individually or collectively by the at least one processor, the wireless audio device, A wireless audio device that enables the speaker and senses the current through the current sensor when a periodic Bluetooth beacon signal is transmitted through the Bluetooth communication circuit.

4. In any one of paragraphs 1 through 3, The above audio processing circuit is, A first audio processing circuit that decodes the above audio data to obtain the first audio data signal and amplifies and outputs the decoded first audio data signal; A second audio processing circuit that outputs a second audio data signal by adjusting the gain and phase of a signal corresponding to the above voltage; A mixer that mixes the first audio data signal and the second audio data signal; A digital-to-analog converter that converts the mixed first audio data signal and the second audio data signal into an analog audio signal; and A wireless audio device comprising an amplifier that amplifies the analog audio signal and outputs it to the speaker.

5. In any one of paragraphs 1 through 4, The above second audio processing circuit is, A gain control circuit that controls the gain of a signal corresponding to the voltage using a specified gain value; and A wireless audio device comprising a phase control circuit that controls the phase of a signal corresponding to the voltage using a specified phase value.

6. In any one of paragraphs 1 through 5, The above memory is a wireless audio device that stores the above-mentioned specified gain value.

7. In any one of paragraphs 1 through 6, When the above commands are executed individually or collectively by the at least one processor, the electronic device, An electronic device that sets the specified gain value stored in memory to the gain control circuit upon booting of the wireless audio device.

8. In any one of paragraphs 1 through 7, A wireless audio device having a specified phase value based on a first phase value based on a first direction in which a coil included in the speaker is wound, or a second phase value based on a second direction in which the coil is wound different from the first direction.

9. In any one of paragraphs 1 through 8, Microphone; and Includes additional tuning systems, When the above commands are executed individually or collectively by the at least one processor, the electronic device, Generating the above current of the above battery, Using the above microphone, noise generated through the speaker by the magnetic field of the above current is recorded, and A wireless audio device that uses the above tuning system to determine the gain value of the gain control circuit so that the volume of the noise becomes less than or equal to a specified threshold.

10. In any one of paragraphs 1 through 9, When the above commands are executed individually or collectively by the at least one processor, the electronic device, A wireless audio device that stores the determined gain value as the specified gain value in the memory.

11. A method for removing noise from audio sound output through a speaker (155, 355) from a wireless audio device (101, 201, 202, 301), Based on the fact that the above speaker is enabled, the operation of sensing the current output from the battery through a current sensor (176, 376) connected to the battery (189, 389) and converting the sensed current into a voltage; An operation of obtaining a first audio data signal by decoding audio data provided from at least one processor through an audio processing circuit (170, 370); An operation to acquire a second audio data signal to cancel out noise generated through the speaker by a magnetic field generated by the current output from the battery using the voltage through the audio processing circuit; The operation of mixing the first audio data signal and the second audio data signal through the audio processing circuit; A method comprising the operation of amplifying the mixed first audio data signal and the second audio data signal and outputting them through the speaker.

12. In Paragraph 11, A method comprising the operation of sensing the current through the current sensor when the above speaker is enabled and communication is made through the communication circuit of the above wireless audio device.

13. In Paragraph 11 or 12, The above communication circuit includes a Bluetooth communication circuit, and A method comprising the operation of sensing the current through the current sensor when the above speaker is enabled and a periodic Bluetooth beacon signal is transmitted through the above Bluetooth communication circuit.

14. In any one of paragraphs 11 through 13, The above audio processing circuit includes a first audio processing circuit, a second audio processing circuit, a mixer, a digital-to-analog converter, and an amplifier, and The operation of decoding the audio data through the first audio processing circuit and amplifying and outputting the decoded first audio data signal; An operation of outputting a second audio data signal by adjusting the gain and phase of a signal corresponding to the voltage through the second audio processing circuit; The operation of mixing the first audio data signal and the second audio data signal through the mixer; The operation of converting the mixed first audio data signal and the second audio data signal into an analog audio signal through the digital-to-analog converter; and A method comprising the operation of amplifying the analog audio signal through the amplifier and outputting it to the speaker.

15. In a non-transient storage medium storing commands, said commands are configured to cause the wireless audio device (101, 201, 202, 301) to perform at least one operation when executed by the wireless audio device, said at least one operation being, Based on the speaker (155, 355) of the wireless audio device being enabled, the operation of sensing the current output from the battery through a current sensor (176, 376) connected to the battery (189, 389) and converting the sensed current into a voltage; An operation of obtaining the first audio data signal by decoding audio data provided by at least one processor of the wireless audio device through an audio processing circuit (170, 370); An operation to acquire a second audio data signal to cancel out noise generated through the speaker by the magnetic field generated by the current using the voltage through the audio processing circuit; The operation of mixing the first audio data signal and the second audio data signal through the audio processing circuit; A storage medium comprising the operation of outputting the mixed first audio data signal and the second audio data signal through the speaker.

Images