Noise elimination device, earphone and speaker

Abstract

The invention belongs to the field of electronic technology, and discloses a noise elimination device, an earphone, and a speaker, comprising a wireless control module, a digital-to-analog conversion module, and an audio playback module; the wireless control module receives a wireless signal sent by a terminal, the wireless signal carries voice information and audio information, and generates a digital audio signal according to the voice information and the audio information; the digital-to-analog conversion module generates an analog audio signal according to the digital audio signal; the audio playback module plays according to the analog audio signal; because the wireless control module generates the digital audio signal according to the voice information and the audio information, switching between generating an analog audio signal according to the audio information and generating an analog audio signal according to the target voice information is avoided, and the peak signal at the switching moment is prevented from generating noise, thereby improving the effect of the earphone or the speaker.

Description

Technical Field

[0001] The invention belongs to the field of electronic technology, and in particular relates to a noise elimination device, earphones and a speaker. Background Art

[0002] As voice interaction technology matures, the terminal sends audio information to headphones or speakers for playback, while also obtaining target voice information based on the user's input voice and sending the target voice information to headphones or speakers for playback.

[0003] Traditional headphones or speakers include a wireless control module and an audio playback module. The wireless control module receives the audio information and target voice information sent by the terminal, and generates an analog audio signal based on the audio information and the target voice information, and the audio playback module plays the analog audio signal. Since the wireless control module needs to switch between generating an analog audio signal based on the audio information and generating an analog audio signal based on the target voice information, the DSP (Digital Singnal Processor) inside the Bluetooth control chip needs to switch the signal. At the moment of DSP switching, the analog audio signal is prone to generate a spike signal, so the audio playback module will generate noise, resulting in a relatively large noise in the headphones or speakers.

[0004] Therefore, conventional earphones or speakers have the defect that the audio playback module generates noise at the switching moment between the playing audio information and the target voice information, thus causing the earphones or speakers to produce a large amount of noise. Summary of the invention

[0005] The present invention provides a noise elimination device, earphones and speakers, aiming to solve the problem that the audio playback module of traditional earphones and speakers generates noise at the moment of switching between playing audio information and target voice information, thus causing the earphones or speakers to have high noise.

[0006] The present invention is implemented as follows: a noise elimination device, the noise elimination device comprising:

[0007] A wireless control module for receiving a wireless signal sent by a terminal, the wireless signal carrying voice information and audio information, and generating a digital audio signal according to the voice information and the audio information;

[0008] A digital-to-analog conversion module connected to the wireless control module and configured to generate an analog audio signal according to the digital audio signal;

[0009] An audio playing module connected to the digital-to-analog conversion module and used for playing according to the analog audio signal.

[0010] In one embodiment, the noise elimination device further comprises:

[0011] A power supply module is used to generate power supply according to input DC power to supply power to various functional modules.

[0012] In one embodiment, the noise elimination device further comprises:

[0013] A key module connected to the wireless control module and used to generate a key signal according to a user input;

[0014] The wireless control module is also used to generate a control signal according to the key signal;

[0015] The digital-to-analog conversion module is further configured to stop generating the analog audio signal according to the control signal.

[0016] In one of the embodiments, the button module includes a first button and a second button;

[0017] The first end of the first button and the first end of the second button are connected to the first power supply VAA, and the second end of the first button and the second end of the second button together constitute a button signal output end of the button module.

[0018] In one embodiment, the wireless control module includes a Bluetooth control chip, a filter, a first inductor, a second inductor, an antenna, a first capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, and a sixth resistor;

[0019] The power supply end of the Bluetooth control chip and the first end of the first capacitor are connected to the first power supply, the radio frequency end of the Bluetooth control chip is connected to the first end of the filter, the second end of the filter is connected to the first end of the second inductor, the second end of the second inductor is connected to the antenna and the first end of the first inductor, the first data input and output end of the Bluetooth control chip and the second data input and output end of the Bluetooth control chip jointly constitute the key signal input end of the wireless control module, the third data input and output end of the Bluetooth control chip, the fourth data input and output end of the Bluetooth control chip, the first end of the first resistor and the first end of the second resistor jointly constitute the control signal output end of the wireless control module, and the first end of the first resistor The second end of the third resistor and the second end of the second resistor are commonly connected to the first power supply, the fifth data input and output end of the Bluetooth control chip is connected to the first end of the third resistor, the SPI master input and slave output end of the Bluetooth control chip is connected to the first end of the fourth resistor, the SPI chip select end of the Bluetooth control chip is connected to the first end of the fifth resistor, the SPI clock end of the Bluetooth control chip is connected to the first end of the sixth resistor, the second end of the third resistor, the second end of the fourth resistor, the second end of the fifth resistor and the second end of the sixth resistor together constitute the digital audio signal output end of the wireless control module, and the ground end of the Bluetooth control chip, the second end of the first inductor and the first end of the first capacitor are commonly connected to the power ground.

[0020] In one embodiment, the digital-to-analog conversion module includes a codec, a third inductor, a fourth inductor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a seventh resistor, and an eighth resistor;

[0021] The power supply terminal of the codec and the first end of the second capacitor are connected to the second power supply in common. The control data input terminal of the codec and the control data clock terminal of the codec jointly constitute the control signal input terminal of the digital-to-analog conversion module. The codec master clock terminal of the codec, the audio interface bit clock terminal of the codec, the digital audio data terminal of the codec and the audio interface left and right clock terminals of the codec jointly constitute the digital audio signal input terminal of the digital-to-analog conversion module. The positive power supply decoupling terminal of the charge pump of the codec is connected to the first end of the third capacitor, the negative power supply decoupling terminal of the charge pump of the codec is connected to the first end of the fourth capacitor, the microphone bias terminal of the codec is connected to the first end of the fifth capacitor, the intermediate voltage decoupling terminal of the codec is connected to the first end of the sixth capacitor, the left earphone output terminal of the codec is connected to the first end of the third inductor, and the right earphone output terminal of the codec is connected to the first end of the fourth inductor. The first end of the seventh capacitor, the second end of the fourth inductor and the first end of the eighth capacitor together constitute the analog audio signal output end of the digital-to-analog conversion module, the second end of the seventh capacitor is connected to the first end of the seventh resistor, the second end of the eighth capacitor is connected to the first end of the eighth resistor, the first charge pump flyback capacitor end of the encoder and decoder is connected to the first end of the ninth capacitor, the second charge pump flyback capacitor end of the encoder and decoder is connected to the second end of the ninth capacitor, the headphone output noise feedback end of the encoder and decoder, the digital ground end of the encoder and decoder, the analog ground end of the encoder and decoder, the analog ground end of the encoder and decoder, the charge pump ground end of the encoder and decoder, the second end of the second capacitor, the second end of the third capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor, the second end of the sixth capacitor, the second end of the seventh resistor and the second end of the eighth resistor are commonly connected to the power ground.

[0022] An embodiment of the present invention further provides an earphone, which includes the noise elimination device as described above.

[0023] An embodiment of the present invention further provides a sound box, which includes the noise elimination device as described above.

[0024] The embodiment of the present invention includes a wireless control module, a digital-to-analog conversion module and an audio playback module; the wireless control module receives a wireless signal sent by a terminal, the wireless signal carries voice information and audio information, and generates a digital audio signal according to the voice information and audio information; the digital-to-analog conversion module generates an analog audio signal according to the digital audio signal; the audio playback module plays according to the analog audio signal; since the wireless control module generates a digital audio signal according to the voice information and audio information, switching between generating an analog audio signal according to audio information and generating an analog audio signal according to target voice information is avoided, and noise is prevented from being generated by a peak signal at the switching moment, thereby improving the effect of the earphone or speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical invention in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A module structure diagram of a noise elimination device provided by an embodiment of the present invention;

[0027] Figure 2 Another module structure diagram of the noise elimination device provided by an embodiment of the present invention;

[0028] Figure 3 Another module structure diagram of the noise elimination device provided by an embodiment of the present invention;

[0029] Figure 4 This is an exemplary circuit structure diagram of a noise elimination device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0031] Figure 1 The module structure of the noise elimination device provided by the embodiment of the present invention is shown. For the convenience of description, only the part related to the embodiment of the present invention is shown, which is described in detail as follows:

[0032] The noise elimination device includes a wireless control module 01 , a digital-to-analog conversion module 02 and an audio playback module 03 .

[0033] The wireless control module 01 is used to receive the wireless signal sent by the terminal, the wireless signal carries voice information and audio information, and generates a digital audio signal based on the voice information and audio information; the digital-to-analog conversion module 02 is connected to the wireless control module 01, and is used to generate an analog audio signal based on the digital audio signal; the audio playback module 03 is connected to the digital-to-analog conversion module 02, and is used to play based on the analog audio signal.

[0034] like Figure 2 As shown, the noise elimination device further includes a power module 04 .

[0035] The power module 04 is used to generate power supply according to the input direct current to supply power to each functional module.

[0036] like Figure 3 As shown, the noise elimination device also includes a button module 05.

[0037] The key module 05 is connected to the wireless control module 01 and is used to generate a key signal according to the user input; the wireless control module 01 is also used to generate a control signal according to the key signal; the digital-to-analog conversion module 02 is also used to stop generating the analog audio signal according to the control signal.

[0038] The key module 05 generates a key signal according to the user input to control the generation of an analog audio signal, thereby realizing the stop function of the audio playback and improving the flexibility of the earphone or speaker control.

[0039] Figure 4 An exemplary circuit structure of a noise elimination device provided by an embodiment of the present invention is shown. For the sake of convenience, only the part related to the embodiment of the present invention is shown, which is described in detail as follows:

[0040] The button module 05 includes a first button K1 and a second button K2.

[0041] The first end of the first button K1 and the first end of the second button K2 are connected to the first power source VAA, and the second end of the first button K1 and the second end of the second button K2 together constitute a button signal output end of the button module 05 .

[0042] The wireless control module 01 includes a Bluetooth control chip U1, a filter F1, a first inductor L1, a second inductor L2, an antenna ANT1, a first capacitor C1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6.

[0043] The power supply terminal VDD of the Bluetooth control chip U1 and the first end of the first capacitor C1 are connected to the first power supply VAA, the radio frequency terminal RF of the Bluetooth control chip U1 is connected to the first end of the filter F1, the second end of the filter F1 is connected to the first end of the second inductor L2, the second end of the second inductor L2 is connected to the antenna ANT1 and the first end of the first inductor L1, the first data input and output terminal PIO6 of the Bluetooth control chip U1 and the second data input and output terminal PIO22 of the Bluetooth control chip U1 jointly constitute the key signal input terminal of the wireless control module 01, the third data input and output terminal PIO1 of the Bluetooth control chip U1, the fourth data input and output terminal PIO0 of the Bluetooth control chip U1, the first end of the first resistor R1 and the first end of the second resistor R2 jointly constitute the control signal output terminal of the wireless control module 01, the second end of the first resistor R1 and the second end of the second resistor R2 are connected to the first power supply VAA, the fifth data input and output terminal PIO4 of the Bluetooth control chip U1 is connected to the first end of the third resistor R3, the SPI (Serial Peripheral) of the Bluetooth control chip U1 The SPI_MISO master input slave output terminal of the Bluetooth control chip U1 is connected to the first end of the fourth resistor R4, the SPI chip select terminal SPI_CSB of the Bluetooth control chip U1 is connected to the first end of the fifth resistor R5, the SPI clock terminal SPI_CLK of the Bluetooth control chip U1 is connected to the first end of the sixth resistor R6, the second end of the third resistor R3, the second end of the fourth resistor R4, the second end of the fifth resistor R5 and the second end of the sixth resistor R6 jointly constitute the digital audio signal output terminal of the wireless control module 01, and the ground terminal VSS of the Bluetooth control chip U1, the second end of the first inductor L1 and the first end of the first capacitor C1 are commonly connected to the power ground.

[0044] The digital-to-analog conversion module 02 includes a codec U2, a third inductor L3, a fourth inductor L4, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a seventh resistor R7 and an eighth resistor R8.

[0045] The power supply terminal VDD of the codec U2 and the first end of the second capacitor C2 are connected to the second power supply VBB, the control data input terminal SDA of the codec U2 and the control data clock terminal SCLK of the codec U2 together constitute the control signal input terminal of the digital-to-analog conversion module 02, the codec master clock terminal MCLK of the codec U2, the audio interface bit clock terminal BCLK of the codec U2, the digital audio data terminal DACDAT of the codec U2 and the audio interface left and right clock terminals LRCLK of the codec U2 together constitute the digital signal input terminal of the digital-to-analog conversion module 02. The digital audio signal input terminal, the charge pump positive power decoupling terminal CPVOUTP of the encoder / decoder U2 is connected to the first end of the third capacitor C3, the charge pump negative power decoupling terminal CPVOUTN of the encoder / decoder U2 is connected to the first end of the fourth capacitor C4, the microphone bias terminal MICBIAS of the encoder / decoder U2 is connected to the first end of the fifth capacitor C5, the intermediate voltage decoupling terminal VMIDC of the encoder / decoder U2 is connected to the first end of the sixth capacitor C6, the left headphone output terminal HPOUTL of the encoder / decoder U2 is connected to the first end of the third inductor L3, and the right earphone output terminal HPOUTL of the encoder / decoder U2 is connected to the first end of the third inductor L3. The output terminal HPOUTR of the machine is connected to the first end of the fourth inductor L4, the second end of the third inductor L3, the first end of the seventh capacitor C7, the second end of the fourth inductor L4 and the first end of the eighth capacitor C8 together constitute the analog audio signal output end of the digital-to-analog conversion module 02, the second end of the seventh capacitor C7 is connected to the first end of the seventh resistor R7, the second end of the eighth capacitor C8 is connected to the first end of the eighth resistor R8, the first charge pump flyback capacitor terminal CPCA of the encoder / decoder U2 is connected to the first end of the ninth capacitor C9, and the second charge pump flyback capacitor terminal CPCA of the encoder / decoder U2 is connected to the first end of the ninth capacitor C9. B is connected to the second end of the ninth capacitor C9, the headphone output noise feedback terminal HPOUTFB of the encoder / decoder U2, the digital ground terminal DGND of the encoder / decoder U2, the analog ground terminal AGND of the encoder / decoder U2, the analog ground terminal AGND of the encoder / decoder U2, the charge pump ground terminal CPGND of the encoder / decoder U2, the second end of the second capacitor C2, the second end of the third capacitor C3, the second end of the fourth capacitor C4, the second end of the fifth capacitor C5, the second end of the sixth capacitor C6, the second end of the seventh resistor R7 and the second end of the eighth resistor R8 are commonly connected to the power ground.

[0046] The following is a combination of working principles Figure 4 As shown for further explanation:

[0047] Antenna ANT1 receives the wireless signal sent by the terminal and sends it to the radio frequency end RF of the Bluetooth control chip U1. The wireless signal carries voice information and audio information. The Bluetooth control chip U1 generates a digital audio signal according to the voice information and audio information and outputs it from the fifth data input and output end PIO4 of the Bluetooth control chip U1, the SPI main input and output end SPI_MISO of the Bluetooth control chip U1, the SPI chip select end SPI_CSB of the Bluetooth control chip U1 and the SPI clock end SPI_CLK of the Bluetooth control chip U1; the codec master clock end MCLK of the codec U2, the audio interface bit clock end BCLK of the codec U2, the digital audio data end DACDAT of the codec U2 and the audio interface left and right clock ends LRCLK of the codec U2 receive the digital audio signal, the codec U2 generates an analog audio signal according to the digital audio signal and outputs it from the left headphone output end HPOUTL of the codec U2 and the right headphone output end HPOUTR of the codec U2 to the audio playback module 03; the audio playback module 03 plays according to the analog audio signal.

[0048] The first button K1 and the second button K2 generate button signals according to user input and send them to the first data input / output terminal PIO6 of the Bluetooth control chip U1 and the second data input / output terminal PIO22 of the Bluetooth control chip U1; the Bluetooth control chip U1 generates a control signal according to the button signal and outputs it from the third data input / output terminal PIO1 of the Bluetooth control chip U1 and the fourth data input / output terminal PIO0 of the Bluetooth control chip U1; the control data input terminal SDA of the encoder / decoder U2 and the control data clock terminal SCLK of the encoder / decoder U2 receive the control signal, and the encoder / decoder U2 stops generating the analog audio signal according to the control signal.

[0049] An embodiment of the present invention further provides an earphone, which includes the noise elimination device as described above.

[0050] An embodiment of the present invention further provides a sound box, which includes the noise elimination device as described above.

[0051] The embodiment of the present invention includes a wireless control module, a digital-to-analog conversion module and an audio playback module; the wireless control module receives a wireless signal sent by a terminal, the wireless signal carries voice information and audio information, and generates a digital audio signal according to the voice information and audio information; the digital-to-analog conversion module generates an analog audio signal according to the digital audio signal; the audio playback module plays according to the analog audio signal; since the wireless control module generates a digital audio signal according to the voice information and audio information, switching between generating an analog audio signal according to audio information and generating an analog audio signal according to target voice information is avoided, and noise is prevented from being generated by a peak signal at the switching moment, thereby improving the effect of the earphone or speaker.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A noise elimination device, characterized in that: The noise elimination device comprises: A wireless control module for receiving a wireless signal sent by a terminal, the wireless signal carrying voice information and audio information, and generating a digital audio signal according to the voice information and the audio information; A digital-to-analog conversion module connected to the wireless control module and configured to generate an analog audio signal according to the digital audio signal; An audio playing module connected to the digital-to-analog conversion module and used for playing according to the analog audio signal; The noise elimination device also includes: A key module connected to the wireless control module and used to generate a key signal according to a user input; The wireless control module is also used to generate a control signal according to the key signal; The digital-to-analog conversion module is also used to stop generating the analog audio signal according to the control signal; The button module includes a first button and a second button; The first end of the first button and the first end of the second button are connected to the first power supply VAA, and the second end of the first button and the second end of the second button together constitute a button signal output end of the button module; The wireless control module includes a Bluetooth control chip, a filter, a first inductor, a second inductor, an antenna, a first capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor; The power supply end of the Bluetooth control chip and the first end of the first capacitor are connected to the first power supply, the radio frequency end of the Bluetooth control chip is connected to the first end of the filter, the second end of the filter is connected to the first end of the second inductor, the second end of the second inductor is connected to the antenna and the first end of the first inductor, the first data input and output end of the Bluetooth control chip and the second data input and output end of the Bluetooth control chip jointly constitute the key signal input end of the wireless control module, the third data input and output end of the Bluetooth control chip, the fourth data input and output end of the Bluetooth control chip, the first end of the first resistor and the first end of the second resistor jointly constitute the control signal output end of the wireless control module, and the first end of the first resistor The second end of the first resistor and the second end of the second resistor are commonly connected to the first power supply, the fifth data input and output end of the Bluetooth control chip is connected to the first end of the third resistor, the SPI master input and slave output end of the Bluetooth control chip is connected to the first end of the fourth resistor, the SPI chip select end of the Bluetooth control chip is connected to the first end of the fifth resistor, the SPI clock end of the Bluetooth control chip is connected to the first end of the sixth resistor, the second end of the third resistor, the second end of the fourth resistor, the second end of the fifth resistor and the second end of the sixth resistor together constitute the digital audio signal output end of the wireless control module, and the ground end of the Bluetooth control chip, the second end of the first inductor and the first end of the first capacitor are commonly connected to the power ground; The digital-to-analog conversion module includes a codec, a third inductor, a fourth inductor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a ninth capacitor, a seventh resistor, and an eighth resistor; The power supply terminal of the codec and the first end of the second capacitor are connected to the second power supply in common. The control data input terminal of the codec and the control data clock terminal of the codec jointly constitute the control signal input terminal of the digital-to-analog conversion module. The codec master clock terminal of the codec, the audio interface bit clock terminal of the codec, the digital audio data terminal of the codec and the audio interface left and right clock terminals of the codec jointly constitute the digital audio signal input terminal of the digital-to-analog conversion module. The positive power supply decoupling terminal of the charge pump of the codec is connected to the first end of the third capacitor, the negative power supply decoupling terminal of the charge pump of the codec is connected to the first end of the fourth capacitor, the microphone bias terminal of the codec is connected to the first end of the fifth capacitor, the intermediate voltage decoupling terminal of the codec is connected to the first end of the sixth capacitor, the left earphone output terminal of the codec is connected to the first end of the third inductor, and the right earphone output terminal of the codec is connected to the first end of the fourth inductor. The first end of the seventh capacitor, the second end of the fourth inductor and the first end of the eighth capacitor together constitute the analog audio signal output end of the digital-to-analog conversion module, the second end of the seventh capacitor is connected to the first end of the seventh resistor, the second end of the eighth capacitor is connected to the first end of the eighth resistor, the first charge pump flyback capacitor end of the encoder and decoder is connected to the first end of the ninth capacitor, the second charge pump flyback capacitor end of the encoder and decoder is connected to the second end of the ninth capacitor, the headphone output noise feedback end of the encoder and decoder, the digital ground end of the encoder and decoder, the analog ground end of the encoder and decoder, the analog ground end of the encoder and decoder, the charge pump ground end of the encoder and decoder, the second end of the second capacitor, the second end of the third capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor, the second end of the sixth capacitor, the second end of the seventh resistor and the second end of the eighth resistor are commonly connected to the power ground.

2. The noise elimination device according to claim 1, characterized in that The noise elimination device also includes: A power supply module is used to generate power supply according to input DC power to supply power to various functional modules.

3. A headset, characterized in that: The earphone comprises the noise cancellation device according to any one of claims 1 to 2.

4. A sound box, characterized in that: The sound box comprises the noise elimination device according to any one of claims 1 to 2.

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