Audio processing device and method with private call function and electronic equipment

Abstract

The invention relates to an audio processing device and method with a private call function and electronic equipment. An audio processing apparatus may include: a first input interface to receive an audio signal; a phase modulation circuit disposed in a first path connected to the first input interface for adjusting a phase of the audio signal; the first amplifier is arranged in the first path, is connected to the phase modulation circuit and is used for amplifying the audio signal subjected to phase modulation and providing the amplified audio signal to the first loudspeaker through the second output interface; the first amplifier is arranged in a first path connected to the first input interface, the second amplifier is arranged in a second path connected to the first input interface, and is used for amplifying the audio signal and providing the amplified audio signal to the second loudspeaker through the third output interface, and the phase modulation circuit is used for adjusting the phase of the audio signal. The audio signal output by the first loudspeaker and the audio signal output by the second loudspeaker are superposed with each other in a cancelling manner.

Description

Technical Field

[0001] The present application generally relates to the field of audio processing, and in particular, to an audio processing device and an audio processing method with a private call function, and an electronic device including the audio processing device. Background Art

[0002] There are generally two types of audio output interfaces for mobile phones: one is through earphone output and the other is through speaker output. Earphone output can ensure that the output audio can only be heard by the user himself, which helps to protect privacy, but it requires additional earphone equipment and may make the user feel uncomfortable when wearing earphones. For speaker output, whether in handset mode or hands-free mode, when the volume is relatively high, the output audio may be heard by people nearby, resulting in privacy leakage, which is undesirable. Summary of the invention

[0003] The present invention is proposed in view of the above problems. One aspect of the present invention is to provide an audio processing device, which can amplify the same audio signal in two paths respectively, and make the phases of the audio signals in the two paths opposite to each other, so that when the two audio signals are output through two speakers, they can be destructively superimposed on each other to achieve the function of private call. Another aspect of the present invention is to provide a reconfigurable audio processing device. When the private call function is enabled, the two audio signals output by the audio processing device can be destructively superimposed; and when the private call function is turned off, the two audio signals output by the audio processing device can produce a stereo effect. The present invention also provides a corresponding audio processing method and an electronic device including an audio processing device.

[0004] According to one embodiment, an audio processing device may include: a first input interface for receiving an audio signal; a phase adjustment circuit, arranged in a first path connected to the first input interface, for adjusting the phase of the audio signal; a first amplifier, arranged in the first path and connected to the phase adjustment circuit, for amplifying the phase-adjusted audio signal and providing the amplified audio signal to a first speaker via a second output interface; and a second amplifier, arranged in a second path connected to the first input interface, for amplifying the audio signal and providing the amplified audio signal to a second speaker via a third output interface, wherein the phase adjustment circuit adjusts the phase of the audio signal so that the audio signal output through the first speaker and the audio signal output through the second speaker are destructively superimposed on each other.

[0005] According to an embodiment, the phase modulation circuit may include: an inverter for inverting the audio signal, or a delay circuit for delaying the phase of the audio signal by more than 90 degrees and less than 270 degrees, preferably about 180 degrees.

[0006] According to an embodiment, the audio processing device may further include: a boost circuit configured to convert a power supply voltage into a high voltage higher than the power supply voltage, and use the high voltage to power the first amplifier and the second amplifier.

[0007] According to one embodiment, the audio processing device may further include: a detection circuit, used to detect at least one of a first amplitude of the phase-modulated audio signal in the first path and a second amplitude of the audio signal in the second path, and generate an amplitude indication signal; and a control module, used to generate a boost control signal based on the amplitude indication signal, and provide the boost control signal to the boost circuit, and the boost circuit converts the power supply voltage into a high voltage corresponding to the boost control signal according to the boost control signal.

[0008] According to an embodiment, the audio processing device may further include: a demultiplexing unit connected between the first input interface and the first path and the second path; and a bypass path connected between the input end and the output end of the phase modulation circuit. The audio signal received by the first input interface is a multiplexed signal including a first audio signal and a second audio signal. When the privacy call function is turned off, the control module controls the demultiplexing unit to demultiplex the multiplexed signal to provide the first audio signal and the second audio signal to the first path and the second path respectively, and the control module turns on the bypass path so as not to enable the phase modulation circuit. When the privacy call function is enabled, the control module controls the demultiplexing unit to demultiplex the multiplexed signal to provide one of the first audio signal and the second audio signal to the first path and the second path, and the control module turns off the bypass path so as to enable the phase modulation circuit.

[0009] According to an embodiment, the control module determines whether to enable the private call function based on the volume of the audio signal or the enable signal received from the fourth input interface.

[0010] According to one embodiment, an audio processing method may include: receiving an audio signal from a first input interface; a phase modulation circuit adjusting the phase of the audio signal in a first path, a first amplifier amplifying the phase-modulated audio signal, and providing the amplified audio signal to a first speaker via a second output interface; and a second amplifier amplifying the audio signal in a second path, and providing the amplified audio signal to a second speaker via a third output interface, wherein the phase modulation circuit adjusts the phase of the audio signal so that the audio signal output through the first speaker and the audio signal output through the second speaker are destructively superimposed on each other.

[0011] According to an embodiment, adjusting the phase of the audio signal includes: inverting the audio signal, or delaying the phase of the audio signal by more than 90 degrees and less than 270 degrees, preferably about 180 degrees.

[0012] According to one embodiment, the audio processing method may further include: detecting at least one of a first amplitude of the phase-modulated audio signal in the first path and a second amplitude of the audio signal in the second path, and generating an amplitude indication signal based on the detected amplitude value; generating a boost control signal based on the amplitude indication signal; and according to the boost control signal, the boost circuit converting the power supply voltage into a high voltage higher than the power supply voltage, and using the high voltage to power the first amplifier and the second amplifier.

[0013] According to one embodiment, the audio signal received from the first input interface is a multiplexed signal including a first audio signal and a second audio signal. The audio processing method may further include: when the privacy call function is turned off, demultiplexing the multiplexed signal to provide the first audio signal and the second audio signal to the first path and the second path respectively, and turning on a bypass path connected between an input end and an output end of the phase modulation circuit, so that the phase modulation circuit is not enabled; when the privacy call function is enabled, demultiplexing the multiplexed signal to provide one of the first audio signal and the second audio signal to the first path and the second path, and disconnecting the bypass path, so that the phase modulation circuit is enabled.

[0014] According to an embodiment, the audio processing method may further include: determining whether to enable the privacy call function based on the volume of the audio signal or the enable signal received from the fourth input interface.

[0015] According to an embodiment, an electronic device may include the above-mentioned audio processing device.

[0016] The above and other features and advantages of the present invention will become apparent from the following description of exemplary embodiments with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of an audio processing device according to an embodiment of the present invention.

[0018] Figure 2 is a schematic diagram of an audio processing device according to an embodiment of the present invention.

[0019] Figure 3 is a schematic diagram of an audio processing device according to an embodiment of the present invention.

[0020] Figure 4 is a schematic diagram of an audio processing method according to an embodiment of the present invention.

[0021] Figure 5 is a schematic diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] In order to facilitate a better understanding of the principles of the present invention, exemplary embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the embodiments described below are only a part of the embodiments of the present invention, rather than all embodiments. Based on the teachings of this application, other embodiments that can be obtained by a person of ordinary skill in the art should also fall within the scope of protection defined by the claims of this application.

[0023] Figure 1 FIG. 1 is a schematic diagram of an audio processing device 100 according to an embodiment of the present invention. Figure 1 As shown, the audio processing device 100 may include a phase adjustment circuit 112, a first amplifier 114, a second amplifier 116, and a boost circuit 118. In one embodiment, the above components of the audio processing device 100 may be implemented in a single audio processing chip. In another embodiment, a part of the components of the audio processing device 100 may be implemented in the audio processing chip, while another part (one or more) of the components may be implemented as discrete components or implemented in another chip. For example, the phase adjustment circuit 112, the first amplifier 114, and the second amplifier 116 may be implemented in the audio processing chip, while the boost circuit 118 may be implemented as a discrete component or implemented in a boost chip. In yet another embodiment, the above components of the audio processing device 100 may be implemented as discrete components on a circuit board.

[0024] Reference Figure 1, the audio processing device 100 can receive an audio signal from the first input interface 101. Although not shown, as needed, the audio processing device 100 can also include a digital-to-analog conversion circuit (DAC) for performing digital-to-analog conversion on the received audio signal, converting the digital audio signal into an analog signal for subsequent processing. The audio signal received from the first input interface 101 (for example, after digital-to-analog conversion) can be provided to two processing paths: in the first path, the phase modulation circuit 112 can adjust the phase of the audio signal, and then the first amplifier 114 can perform power amplification processing on the audio signal, and the amplified audio signal can be output through the second output interface 102, for example, provided to the first speaker (SPK1) 122 to play the audio signal; in the second path, the audio signal can be amplified by the second amplifier 116, and then output through the third output interface 103, for example, provided to the second speaker (SPK2) 124 to play the audio signal. The first path and the second path receive the same audio signal. Since the phase of the audio signal transmitted in the first path is adjusted by the phase modulation circuit 112, and the phase of the audio signal transmitted in the second path is not adjusted, there is a phase difference between the audio signal played by the first speaker 122 and the audio signal played by the second speaker 124, which causes the two to superimpose (or interfere) with each other in space, thereby realizing a privacy call function, which will be further described in detail below.

[0025] The phase modulation circuit 112 provided in the first path and connected to the first input interface 101 may be any circuit having a phase adjustment function, examples of which include but are not limited to an inverter (INV), a delay circuit, etc. The inverter may be, for example, a CMOS inverter, which inverts the phase of the audio signal, and the delay circuit may delay the phase of the audio signal by more than 90 degrees and less than 270 degrees, preferably about 180 degrees, and play a similar effect to the inverter. It can be understood that when the phase difference between the two audio signals is greater than 90 degrees and less than 270 degrees, the two will be destructively superimposed on each other, and when the phase difference is about 180, the phases of the two are substantially opposite, and theoretically the maximum degree of destructive superposition can be achieved. Therefore, in an embodiment of the present invention, by adjusting the phase of the audio signal, the phase of the audio signal transmitted in the first path is different from that of the audio signal transmitted in the second path, preferably the phases are substantially opposite to each other, so that after being played through the speaker, they can be destructively superimposed in space.

[0026] Refer here Figure 1In the described embodiment, although it is shown that the phase modulation circuit 112 is only provided in the first path, in other embodiments, the phase modulation circuit may also be provided in the second path, or the phase modulation circuit may be provided in both the first path and the second path, as long as a phase difference can be introduced into the audio signals transmitted in the first path and the second path so that the two can be destructively superimposed on each other after being played by the speaker.

[0027] The first amplifier 114 and the second amplifier 116 can be any type of audio power amplifier, preferably the same type of audio power amplifier, such as a class D amplifier, a class A amplifier, a class B amplifier, a class AB amplifier, etc., but the embodiments of the present invention are not limited thereto, and the first amplifier 114 and the second amplifier 116 can also be different types of audio power amplifiers. When the first amplifier 114 and the second amplifier 116 are the same type of audio power amplifiers, the two produce substantially the same time delay for the audio signal, so that no additional phase difference is introduced. The first amplifier 114 and the second amplifier 116 can amplify the audio signal by the same multiple, that is, the two have the same gain, and provide the amplified audio signal to the first speaker 122 and the second speaker 124 via the second output interface 102 and the third output interface 103, respectively, for playback.

[0028] The boost circuit 118 may be, for example, a DC-DC converter, a charge pump, or other types of boost circuits, which may receive a power supply voltage VCC from, for example, the fourth input interface 104, convert the power supply voltage VCC into a higher high voltage PVDD, and use the high voltage PVDD to power the first amplifier 114 and the second amplifier 116. It can be understood that in application scenarios such as portable electronic devices such as mobile phones, the electronic devices are generally powered by batteries, and their power supply voltage is relatively low, which may not be enough to provide the high voltage required for audio power amplification. Therefore, the boost circuit 118 may be used to power the first amplifier 114 and the second amplifier 116, for example, at least to power the output stage in the amplifier, and some other components in the amplifier may be powered by the power supply voltage VCC. In one embodiment, the boost circuit 118 may provide a fixed high voltage PVDD to power the first amplifier 114 and the second amplifier 116; in another embodiment, the boost circuit 118 may provide a corresponding adjustable high voltage PVDD to power the first amplifier 114 and the second amplifier 116 according to the amplitude of the audio signal to be amplified, which may avoid truncation distortion and save energy. In yet another embodiment, if the power supply voltage VCC of the system is sufficient to provide the high voltage required for audio power amplification, the boost circuit 118 may be omitted.

[0029] The first speaker 122 and the second speaker 124 can be arranged in the shell of an electronic device such as a mobile phone, and the sound signals played by them can be guided by the sound channel and propagated to the outside world through the through holes on the shell, so that the user can hear them. Among them, the sound through holes corresponding to the first speaker 122 and the second speaker 124 can be located at different positions on the shell, for example, arranged on both sides of the bottom of the shell, or arranged side by side in the shell above the screen, or arranged on both sides of the top of the shell, or respectively arranged at the bottom and top of the shell, or respectively arranged in the shell above the screen and the top of the shell, and so on. As mentioned above, since the phases of the sound signals played by the first speaker 122 and the second speaker 124 are opposite to each other, or differ by 180 degrees, in an ideal case, the two sound signals can be destructively superimposed / interfered with each other, so that the user cannot hear the sound signal. However, in actual use, when the user holds the mobile phone for a call, the ear is close to the mobile phone, and the first speaker 122 and the second speaker 124 (or the sound holes corresponding to the two) are located at different positions. Therefore, the distances from the first speaker 122 and the second speaker 124 to the user's ear are different, which will produce an additional phase difference, resulting in that the two sound signals do not ideally cancel each other at the human ear position, and the user can still hear the played sound, although the volume may be reduced to a certain extent. On the other hand, when there are other people around the user, since the other people are far away from the mobile phone, relative to the far distance, the first speaker 122 and the second speaker 124 (or the sound holes corresponding to the two) can be regarded as being basically at the same position, so the sound signals played by the two are basically opposite to each other or 180 degrees apart when reaching the ears of other people around, so they can cancel each other well, so that the user can hear the sound signals played by the first speaker 122 and the second speaker 124, while other people around can basically not hear (or basically can not hear clearly) the sound signals played by the first speaker 122 and the second speaker 124, thereby realizing the function of private call.

[0030] Although the application scenario of the audio processing device 100 is described above using a mobile phone as an example, it should be understood that the audio processing device 100 of the present invention is not limited to being used in mobile phones, but can also be applied to other electronic devices, such as wearable devices such as bracelets with call or audio playback functions, and vehicle-mounted electronic devices, etc.

[0031] Figure 2 FIG. 1 is a schematic diagram of an audio processing device 100 according to another embodiment of the present invention. Figure 2 In the illustrated embodiment, the voltage boost circuit 118 can be controlled to generate a corresponding high voltage PVDD according to the amplitude of the audio signal to be amplified, thereby avoiding truncation distortion and improving energy efficiency. Figure 2 Zhongyu Figure 1The same components are denoted by the same reference numerals, and the differences will be mainly described below.

[0032] like Figure 2 As shown, the audio processing device 100 also includes a detection circuit 111, which can detect any one or both of the first amplitude of the audio signal after the phase modulation circuit 112 in the first path performs phase modulation processing and the second amplitude of the audio signal in the second path, and generate an amplitude indication signal based on the amplitude of the detected audio signal. As mentioned above, the first path and the second path receive the same audio signal, and the two only differ in phase, which are opposite to each other or 180 degrees apart. Therefore, it can be considered that the amplitudes of the two are basically the same or close. The detection circuit 111 can detect the amplitude of the audio signal in any one of the first path and the second path to generate an amplitude indication signal. Of course, the detection circuit 111 can also detect the amplitude of the audio signal in each of the first path and the second path, and then generate an amplitude indication signal based on the larger amplitude value. Although Figure 2 The detection circuit 111 detects the amplitude of the audio signal before amplification, but the detection circuit 111 can also detect the amplitude of the audio signal after amplification, and the ratio between the two is the amplification factor of the amplifier, that is, the gain. The detection circuit 111 can provide the generated amplitude indication signal to the control module 113.

[0033] According to the amplitude indication signal provided by the detection circuit 111, the control module 113 can determine the voltage level required for amplifying the audio signal to generate a corresponding boost control signal, and provide the boost control signal to the boost circuit 118 to control its boost process. If the detection circuit 111 indicates the amplitude value of the audio signal before amplification, the control module 113 can determine the power supply voltage required by the amplifier in combination with the gain of the amplifier; if the detection circuit 111 indicates the amplitude value of the audio signal after amplification, the control module 113 can directly determine the power supply voltage required by the amplifier. In one embodiment, the control module 113 can set a plurality of step-shaped thresholds, and determine the required amplifier power supply voltage based on the comparison between the audio signal amplitude value and the threshold, thereby generating a corresponding boost control signal.

[0034] In response to a boost control signal received from the control module 113 , the boost circuit 118 boosts the power supply voltage VCC to a high voltage PVDD corresponding to the boost control signal, and powers the first amplifier 114 and the second amplifier 116 using the high voltage PVDD.

[0035] exist Figure 2In the illustrated embodiment, when the amplitude value of the audio signal is large and a higher power supply voltage is required to perform amplification processing, the control module 113 can increase the value of the high voltage PVDD output by the boost circuit 118; when the amplitude value of the audio signal is small and a lower power supply voltage can be used to perform amplification processing, the control module 113 can reduce the value of the high voltage PVDD output by the boost circuit 118. Therefore, the energy efficiency ratio can be improved while preventing truncation distortion, thereby reducing energy consumption.

[0036] The above describes an embodiment of implementing a private call function using an audio processing device 100 and two speakers. It is understandable that in addition to the private call function, it is also expected that electronic devices such as mobile phones can provide ordinary voice call functions, or can also provide stereo playback effects. On the other hand, the space inside the mobile phone device is limited, and it is expected to control its weight and cost, so it is expected to use as few components as possible to provide as many functions as possible. In some embodiments of the present invention, a reconfigurable audio processing device is provided, whose circuit can be reconfigured to provide a private call function and a stereo playback effect. Figure 3 An embodiment of such an audio processing device 100 is shown. Figure 3 In, with Figure 1 and Figure 2 The same components are denoted by the same reference numerals, and repeated description thereof will be omitted below.

[0037] Reference Figure 3 , the audio signal received by the audio processing device 100 from the first input interface 101 may be a multiplexed signal including the first audio signal and the second audio signal. In one embodiment, the first input interface 101 may be an I2S (also known as IIS) interface, and the audio signal received by the first input interface 101 is a multiplexed signal that time-division multiplexes the left channel audio signal and the right channel audio signal. The demultiplexing unit 115 may be connected to the first input interface 101, and under the control of the control module 113, demultiplexes the multiplexed signal received on the first input interface 101.

[0038] In one embodiment, when the privacy call function is turned off, the control module 113 can control the demultiplexing unit (DEM) 115 to demultiplex the multiplexed signal received from the first input interface 101 to provide the first audio signal (e.g., one of the left channel signal and the right channel signal) and the second audio signal (e.g., the other of the left channel signal and the right channel signal) to the first path and the second path, respectively. In the first path, the bypass path 117 can be connected between the input and output ends of the phase modulation circuit 112. When the privacy call function is turned off, the control module 113 can control the bypass path 117 to be turned on, and the phase modulation circuit 112 can be disabled. At this time, the first audio signal can be transmitted from the bypass path 117 without passing through the phase modulation circuit 112. In this mode, the first audio signal and the second audio signal (for example, the left channel signal and the right channel signal) can be amplified by the first amplifier 114 and the second amplifier 116 in the first path and the second path, respectively, and provided to the first speaker 122 and the second speaker 124 via the second output interface 102 and the third output interface 103, thereby achieving stereo playback.

[0039] In the above stereo playback process, the detection circuit 111 can detect the amplitude of the first audio signal in the first path and the second audio signal in the second path, and generate an amplitude indication signal based on the larger value of the two, and provide the generated amplitude indication signal to the control module 113. The control module 113 can generate a boost control signal according to the amplitude indication signal to control the boost circuit 118 to generate a high voltage PVDD matching the amplitude of the audio signal to power the first amplifier 114 and the second amplifier 116.

[0040] When the private call function is enabled, the control module 113 can control the demultiplexing unit 115 to demultiplex the multiplexed signal received from the first input interface 101 to provide one of the first audio signal (e.g., one of the left channel signal and the right channel signal) and the second audio signal (e.g., the other of the left channel signal and the right channel signal) to the first path and the second path, that is, to provide the same audio signal to both the first path and the second path. The control module 113 also controls the bypass path 117 to be disconnected, and enables the phase adjustment circuit 112, so that the audio signal flows through the phase adjustment circuit 112 in the first path, so that its phase is adjusted. As described above with reference to Figure 1 and Figure 2 As described above, the private call function is achieved by making the phases of the audio signals in the first path and the second path inverted or approximately 180 degrees apart from each other, and the description will not be repeated here.

[0041] In one embodiment, the control module 113 may decide whether to enable the privacy call function based on the privacy call enable signal received from the fifth input interface 105. For example, when the privacy call enable signal is at a high level, the control module 113 may decide to enable the privacy call function; when the privacy call enable signal is at a low level, the control module 113 may decide not to enable the privacy call function, but to perform the stereo playback function. In another embodiment, the control module 113 may decide whether to enable the privacy call function based on the volume of the played audio signal. For example, when making a voice call, if the volume of the played audio signal reaches a predetermined threshold, the control module 113 may decide to enable the privacy call function. In one embodiment, the control module 113 may estimate the volume of the played audio signal based on the amplitude value of the audio signal and the gain of the amplifier.

[0042] exist Figure 3 In the illustrated embodiment, the audio processing device 100 can be reconfigured to perform the desired function, such as private call or stereo playback. Therefore, limited hardware resources can be used to implement rich functions, while saving the internal space and weight of the electronic device and saving costs.

[0043] Figure 4 FIG. 2 is a schematic diagram of an audio processing method 200 according to an embodiment of the present invention. Figure 4 As shown, the audio processing method 200 may include:

[0044] Step 210, receiving an audio signal from the first input interface 101;

[0045] Step 220, the phase modulation circuit 112 in the first path adjusts the phase of the received audio signal, the first amplifier 114 amplifies the phase-modulated audio signal, and provides the amplified audio signal to the first speaker 122 via the second output interface 102; and

[0046] Step 230: In the second path, the second amplifier 116 amplifies the received audio signal and provides the amplified audio signal to the second speaker 124 via the third output interface 103.

[0047] The phase modulation circuit 112 adjusts the phase of the audio signal so that the audio signal outputted by the first speaker 122 and the audio signal outputted by the second speaker 124 are superimposed on each other in a destructive manner.

[0048] In some embodiments, the phase adjustment circuit 112 can adjust the phase of the audio signal to invert the audio signal or delay the phase of the audio signal by more than 90 degrees and less than 270 degrees, preferably about 180 degrees.

[0049] In some embodiments, the audio processing method 200 may further include: detecting at least one of a first amplitude of the phase-modulated audio signal in the first path and a second amplitude of the audio signal in the second path, and generating an amplitude indication signal based on the detected amplitude value; generating a boost control signal based on the amplitude indication signal; and according to the boost control signal, the boost circuit 118 converts the power supply voltage VCC into a high voltage PVDD higher than the power supply voltage VCC, and uses the high voltage PVDD to power the first amplifier 114 and the second amplifier 116.

[0050] In some embodiments, the audio signal received from the first input interface 101 is a multiplexed signal including a first audio signal and a second audio signal. The audio processing method 200 may further include: when the privacy call function is turned off, demultiplexing the multiplexed signal to provide the first audio signal and the second audio signal to the first path and the second path respectively, and turning on the bypass path 117 connected between the input end and the output end of the phase modulation circuit 112, so that the phase modulation circuit 112 is not enabled; when the privacy call function is enabled, demultiplexing the multiplexed signal to provide one of the first audio signal and the second audio signal to both the first path and the second path, and disconnecting the bypass path 117, so that the phase modulation circuit 112 is enabled.

[0051] In some embodiments, the audio processing method 200 may further include: determining whether to enable the private call function based on the volume of the audio signal or the private call enable signal received from the fourth input interface 105 .

[0052] It should be understood that some details and embodiments of the audio processing method 200 have been combined above. Figures 1 to 3 The embodiments of the audio processing device 100 are described in detail, so only a brief description of the audio processing method 200 is given here, and repeated description of some details and related embodiments thereof is omitted.

[0053] Figure 5 FIG. 3 is a schematic diagram of an electronic device 300 according to an embodiment of the present invention. Figure 5 As shown, the electronic device 300 may include the above-mentioned audio processing device 100. Examples of such electronic devices include but are not limited to mobile phones, wearable devices, vehicle-mounted electronic devices, etc. Since the configuration of the audio processing device in these electronic devices is known, it will not be repeated here.

[0054] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0055] The block diagrams of the devices, apparatuses, equipment, and systems involved in this application are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagram. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "including", "comprising", "having", etc. are open words, referring to "including but not limited to", and can be used interchangeably with them. The words "or" and "and" used here refer to the words "and / or" and can be used interchangeably with them, unless the context clearly indicates otherwise. The words "such as" used here refer to the phrase "such as but not limited to", and can be used interchangeably with them.

[0056] It should also be noted that in the apparatus, device and method of the present application, each component or each step can be decomposed and / or recombined. Such decomposition and / or recombination should be regarded as equivalent solutions of the present application.

[0057] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present application. Therefore, the present application is not intended to be limited to the aspects shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0058] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. An audio processing device, comprising: A first input interface, used for receiving an audio signal; a phase adjustment circuit, arranged in a first path connected to the first input interface, for adjusting the phase of the audio signal; a first amplifier, arranged in the first path and connected to the phase modulation circuit, for amplifying the phase-modulated audio signal and providing the amplified audio signal to the first speaker via the second output interface; as well as a second amplifier, arranged in a second path connected to the first input interface, for amplifying the audio signal and providing the amplified audio signal to a second speaker via a third output interface, The phase modulation circuit adjusts the phase of the audio signal so that the audio signal outputted by the first speaker and the audio signal outputted by the second speaker are destructively superimposed on each other.

2. The audio processing device according to claim 1, wherein: The phase modulation circuit comprises: an inverter for inverting the audio signal, or The delay circuit is used to make the phase delay of the audio signal greater than 90 degrees and less than 270 degrees.

3. The audio processing device according to claim 1 or 2, further comprising: A boost circuit is used for converting a power supply voltage into a high voltage higher than the power supply voltage, and using the high voltage to power the first amplifier and the second amplifier.

4. The audio processing device according to claim 3, further comprising: a detection circuit, configured to detect at least one of a first amplitude of the phase-modulated audio signal in the first path and a second amplitude of the audio signal in the second path, and to generate an amplitude indication signal; as well as a control module, configured to generate a voltage boost control signal based on the amplitude indication signal, and provide the voltage boost control signal to the voltage boost circuit, The boost circuit converts the power supply voltage into a high voltage corresponding to the boost control signal according to the boost control signal.

5. The audio processing device according to claim 4, further comprising: a demultiplexing unit connected between the first input interface and the first path and the second path; as well as A bypass path connected between the input end and the output end of the phase modulation circuit, The audio signal received by the first input interface is a multiplexed signal including a first audio signal and a second audio signal. When the privacy call function is turned off, the control module controls the demultiplexing unit to perform demultiplexing processing on the multiplexed signal to provide the first audio signal and the second audio signal to the first path and the second path respectively, and the control module turns on the bypass path so as not to enable the phase modulation circuit. When the private call function is enabled, the control module controls the demultiplexing unit to perform demultiplexing processing on the multiplexed signal to provide one of the first audio signal and the second audio signal to the first path and the second path, and the control module disconnects the bypass path to enable the phase modulation circuit.

6. The audio processing device according to claim 5, wherein: The control module determines whether to enable the private call function based on the volume of the audio signal or the enable signal received from the fourth input interface.

7. An audio processing method, comprising: receiving an audio signal from a first input interface; The phase modulation circuit adjusts the phase of the audio signal in the first path, the first amplifier amplifies the phase-modulated audio signal, and provides the amplified audio signal to the first speaker via the second output interface; as well as In the second path, the second amplifier amplifies the audio signal and provides the amplified audio signal to the second speaker via the third output interface. The phase modulation circuit adjusts the phase of the audio signal so that the audio signal outputted by the first speaker and the audio signal outputted by the second speaker are destructively superimposed on each other.

8. The method of claim 7, wherein: Adjusting the phase of the audio signal includes: invert the audio signal, or The phase delay of the audio signal is made greater than 90 degrees and less than 270 degrees.

9. The method according to claim 7 or 8, further comprising: detecting at least one of a first amplitude of the phase-modulated audio signal in the first path and a second amplitude of the audio signal in the second path, and generating an amplitude indication signal based on the detected amplitude values; generating a voltage boost control signal based on the amplitude indication signal; as well as According to the boost control signal, the boost circuit converts the power supply voltage into a high voltage higher than the power supply voltage, and uses the high voltage to power the first amplifier and the second amplifier.

10. The method according to claim 7 or 8, wherein: The audio signal received from the first input interface is a multiplexed signal including a first audio signal and a second audio signal, and the method further includes: When the privacy call function is turned off, the multiplexed signal is demultiplexed to provide the first audio signal and the second audio signal to the first path and the second path respectively, and a bypass path connected between an input end and an output end of the phase modulation circuit is turned on, so that the phase modulation circuit is not enabled. When the private call function is enabled, the multiplexed signal is demultiplexed to provide one of the first audio signal and the second audio signal to the first path and the second path, and the bypass path is disconnected, thereby enabling the phase modulation circuit.

11. The method of claim 10, further comprising: Whether to enable the private call function is determined based on the volume of the audio signal or the enable signal received from the fourth input interface. 12 . An electronic device comprising the audio processing device according to claim 1 .

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