CN205092899U - Pronunciation transmission device that makes an uproar falls - Google Patents
Pronunciation transmission device that makes an uproar falls Download PDFInfo
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- CN205092899U CN205092899U CN201520866736.7U CN201520866736U CN205092899U CN 205092899 U CN205092899 U CN 205092899U CN 201520866736 U CN201520866736 U CN 201520866736U CN 205092899 U CN205092899 U CN 205092899U
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- noising
- audio decoder
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Abstract
The utility model discloses a pronunciation transmission device that makes an uproar falls, including earphone end, conversation end, audio decoder chip, encryption and decryption chip and modem, the earphone end is provided with the first signal format conversion chip and second signal format conversion chip respectively with the conversation end, the chip of making an uproar that disappears has been connected to the first signal format conversion chip and second signal format conversion chip electricity respectively, disappear and make an uproar the chip and be connected with audio decoder chip, encryption and decryption chip and modem electricity in proper order, disappearing, it is unanimous to make an uproar the frequency of operation of chip and audio decoder chip. The utility model discloses the ability fallen the ambient noise and the echo that do not need for the elimination, remain the voice of needs for the solution that improves of noise problem in the conversation.
Description
Technical field
The utility model relates to secret mobile phone field, is specifically related to a kind of reducing noise of voice transmitting device.
Background technology
In non-encrypted speech transmission device process, when the environmental noise having such as TV, automobile etc. to send when calling party side and the echo of call itself affect, the speech that callee will not hear clear calling party is even difficult to differentiate the speech of calling party.And for encrypted speech transmitting device, even under quiet environment, the sound that callee hears also has certain mixed existence of making an uproar, if environmental factor is bad, callee is by the call sound of very difficult resolution calling party.Therefore, be necessary to study a kind of speech transmission device possessing decrease of noise functions.
Utility model content
The purpose of this utility model addresses the deficiencies of the prior art, and provide a kind of speech transmission device possessing decrease of noise functions, the technical scheme of employing is as follows:
A kind of reducing noise of voice transmitting device, comprise receiver end, communicating end, audio decoder chip, deciphering chip and modulator-demodulator, described receiver end and communicating end are respectively arranged with the first Signal form translate chip and secondary signal format conversion chip, described first Signal form translate chip and secondary signal format conversion chip have been electrically connected de-noising chip respectively, described de-noising chip is electrically connected with audio decoder chip, deciphering chip and modulator-demodulator successively, and described de-noising chip is consistent with the operating frequency of audio decoder chip.
Operation principle of the present utility model: the mainboard of speech transmission device adopts RK3188ARM chip, a block signal format conversion chip is respectively placed at the receiver end of speech transmission device and communicating end, when as calling party, by Signal form translate chip, the audio analog signals from communicating end is converted to PDMD formatted data, and is sent to de-noising chip; De-noising chip is consistent with the operating frequency of audio decoder chip, the two coordinate operation, after de-noising chip carries out de-noising to audio signal, pcm audio signal is sent to audio decoder chip decode, then send to deciphering chip to be encrypted, eventually pass modulator-demodulator and be sent to callee.When as callee, receive the audio signal of calling party's transmission by modulator-demodulator and carry out demodulation, then be sent to deciphering chip to be decrypted, pcm audio signal after deciphering is sent to audio decoder chip, pcm audio signal is sent to format conversion chip by audio decoder chip, is finally sent to receiver end, in addition, pcm audio signal, while pcm audio signal is sent to format conversion chip, is sent to de-noising chip and eliminates echo by audio decoder chip.The utility model respectively places a block signal format conversion chip at receiver end and communicating end, realize the associated drives of de-noising chip, and the ingenious annexation arranged between each parts, thus unwanted environmental noise and echo to eliminating, retain the voice needed, the noise problem in conversing is improved solution.
As preferably, described Signal form translate chip is MIC chip, and described de-noising chip is FM34 de-noising chip, and described audio decoder chip is WM8994 audio decoder chip, and described deciphering chip is DSP deciphering chip.
FM34 de-noising chip is on the basis of carrying out AGC automatic growth control, then carries out Noise Elimination, unwanted environmental noise and echo to eliminating, retaining the voice needed, improving the noise problem solved in call.
As preferably, described MIC chip is digital MIC chip.
Adopt the digital MIC than simulation MIC better performances, further ensure speech quality.
As preferably, the PDMD_CLK signal of described digital MIC chip and the parallel connection of PDMD_DAT signal, the PDMD_CLK signal of described digital MIC chip and PDMD_DAT signal are electrically connected with the PDMD_CLK signal of FM34 de-noising chip and PDMD_DAT signal respectively, and the RXDP signal of described FM34 de-noising chip, TXDP signal, BCLK signal, LRCK signal are electrically connected with the PCM_IN signal of the AIF3 interface of WM8994 audio decoder chip, PCM_OUT signal, PCM_CLK signal, PCM_SYNC signal respectively.
As preferably, described modulator-demodulator is MU609.
Compared with prior art, the beneficial effects of the utility model: adopt speech transmission device of the present utility model can eliminate echo in voice transfer, noise in compacting environment, even if make there is comparatively overall situation noise jamming near calling party, callee still clearly can tell the sound of telephone user, solves the problem in voice transfer well.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment: as shown in Figure 1, a kind of reducing noise of voice transmitting device, comprise receiver end, communicating end, audio decoder chip, deciphering chip and modulator-demodulator, described receiver end and communicating end are respectively arranged with the first Signal form translate chip and secondary signal format conversion chip, described first Signal form translate chip and secondary signal format conversion chip have been electrically connected de-noising chip respectively, described de-noising chip is electrically connected with audio decoder chip, deciphering chip and modulator-demodulator successively, and described de-noising chip is consistent with the operating frequency of audio decoder chip.
Described Signal form translate chip is MIC chip, and described de-noising chip is FM34 de-noising chip, and described audio decoder chip is WM8994 audio decoder chip, and described deciphering chip is DSP deciphering chip.
FM34 de-noising chip is on the basis of carrying out AGC automatic growth control, then carries out Noise Elimination, unwanted environmental noise and echo to eliminating, retaining the voice needed, improving the noise problem solved in call.
Described MIC chip is digital MIC chip.
Adopt the digital MIC than simulation MIC better performances, further ensure speech quality.
The PDMD_CLK signal of described digital MIC chip and the parallel connection of PDMD_DAT signal, the PDMD_CLK signal of described digital MIC chip and PDMD_DAT signal are electrically connected with the PDMD_CLK signal of FM34 de-noising chip and PDMD_DAT signal respectively, and the RXDP signal of described FM34 de-noising chip, TXDP signal, BCLK signal, LRCK signal are electrically connected with the PCM_IN signal of the AIF3 interface of WM8994 audio decoder chip, PCM_OUT signal, PCM_CLK signal, PCM_SYNC signal respectively.
Described modulator-demodulator is MU609.
The course of work of the present embodiment: respectively place one piece of digital MIC chip at the receiver end of speech transmission device and communicating end, when as calling party, by digital MIC chip, the audio analog signals from communicating end is converted to PDMD formatted data, and is sent to FM34 de-noising chip, FM34 de-noising chip is consistent with the operating frequency of WM8994 audio decoder chip, the two coordinate operation, after FM34 de-noising chip carries out de-noising to audio signal, AIF3 interface pcm audio signal being sent to WM8994 audio decoder chip is decoded, decoded pcm audio signal enters DSP deciphering chip through the AIF2 interface of WM8994 audio decoder chip and carries out DSP encryption, eventually pass MU609 and be sent to callee, after callee receives voice, demodulation is carried out by modulator-demodulator, and then carry out DSP deciphering, pcm audio signal after DSP deciphering sends to receiver end by the AIF2 interface of WM8994 audio decoder chip, send to FM34 to eliminate echo by the AIF3 interface of WM8994 audio decoder chip simultaneously.
Claims (5)
1. a reducing noise of voice transmitting device, comprise receiver end, communicating end, audio decoder chip, deciphering chip and modulator-demodulator, it is characterized in that, described receiver end and communicating end are respectively arranged with the first Signal form translate chip and secondary signal format conversion chip, described first Signal form translate chip and secondary signal format conversion chip have been electrically connected de-noising chip respectively, described de-noising chip is electrically connected with audio decoder chip, deciphering chip and modulator-demodulator successively, and described de-noising chip is consistent with the operating frequency of audio decoder chip.
2. a kind of reducing noise of voice transmitting device according to claim 1, it is characterized in that, described Signal form translate chip is MIC chip, and described de-noising chip is FM34 de-noising chip, described audio decoder chip is WM8994 audio decoder chip, and described deciphering chip is DSP deciphering chip.
3. a kind of reducing noise of voice transmitting device according to claim 2, is characterized in that, described MIC chip is digital MIC chip.
4. a kind of reducing noise of voice transmitting device according to claim 3, it is characterized in that, the PDMD_CLK signal of described digital MIC chip and the parallel connection of PDMD_DAT signal, the PDMD_CLK signal of described digital MIC chip and PDMD_DAT signal are electrically connected with the PDMD_CLK signal of FM34 de-noising chip and PDMD_DAT signal respectively, the RXDP signal of described FM34 de-noising chip, TXDP signal, BCLK signal, LRCK signal respectively with the PCM_IN signal of the AIF3 interface of WM8994 audio decoder chip, PCM_OUT signal, PCM_CLK signal, PCM_SYNC signal is electrically connected.
5. a kind of reducing noise of voice transmitting device according to claim 4, is characterized in that, described modulator-demodulator is MU609.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201520866736.7U CN205092899U (en) | 2015-11-03 | 2015-11-03 | Pronunciation transmission device that makes an uproar falls |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201520866736.7U CN205092899U (en) | 2015-11-03 | 2015-11-03 | Pronunciation transmission device that makes an uproar falls |
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CN205092899U true CN205092899U (en) | 2016-03-16 |
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CN201520866736.7U Active CN205092899U (en) | 2015-11-03 | 2015-11-03 | Pronunciation transmission device that makes an uproar falls |
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2015
- 2015-11-03 CN CN201520866736.7U patent/CN205092899U/en active Active
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CP03 | Change of name, title or address |
Address after: Units 505-1 and 505-2, Floor 5, Building A, Jingu Zhichuang Industrial Community, No. 2, Yong'an North Road, Dawu Community, Guicheng Street, Nanhai District, Foshan City, Guangdong Province 528299 Patentee after: Guangdong Shihuan Intelligent Technology Co.,Ltd. Address before: 528299 Unit 603, Floor 6, Building A, Jingu Optoelectronics Industry Community, No. 1, Yong'an North Road, Pingzhou, Guicheng Street, Nanhai District, Foshan City, Guangdong Province Patentee before: FOSHAN WHOLE SMART TECHNOLOGY Co.,Ltd. |
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CP03 | Change of name, title or address |