CN202602759U - Audio transmission circuit and dual-mode dual-standby mobile terminal - Google Patents
Audio transmission circuit and dual-mode dual-standby mobile terminal Download PDFInfo
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- CN202602759U CN202602759U CN201220099962.3U CN201220099962U CN202602759U CN 202602759 U CN202602759 U CN 202602759U CN 201220099962 U CN201220099962 U CN 201220099962U CN 202602759 U CN202602759 U CN 202602759U
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Abstract
The utility model discloses an audio transmission circuit and a dual-mode dual-standby mobile terminal. The audio transmission circuit is applied to a dual-mode dual-standby hardware platform which is designed by adopting a dual-mode and single-standby supporting processor and an auxiliary modem, and used for transmitting call voice received and transmitted through the auxiliary modem. In the audio transmission circuit, local voice signals collected by microphones are transmitted to the auxiliary modem, modulated by the auxiliary modem, and transmitted by an antenna on the one hand, and transmitted to a codec, processed by the codec, and sent to an application processor on the other hand; opposite-side voice signals, which are received and demodulated by the auxiliary modem, sent to the codec, and processed by the codec, are outputted through a loudspeaker or a telephone receiver on the one hand, and sent to the application processor on the other hand so as to be combined into bidirectional recording data and stored in a memory. According to the utility model, bidirectional acquisition of the call voice is realized by using the codec, thereby providing recording data for the application processor. The recording process is simple and efficient, and the workload is small.
Description
Technical field
The utility model belongs to the mobile communication terminal technical field, specifically, relates to a kind of to the audio signal transmission path of double model double standby phone design and the double-mode double-standby mobile terminal that adopts said voice-frequency channel design design.
Background technology
Along with the fast development of mobile communication technology and improving constantly of consumer's user demand; Can support two different network formats and two networks to be favored by increasing consumer at the double model double standby phone of net simultaneously; Make the consumer who has two mobile phone cards only need carry a mobile phone and can use any one in the machine to stick into row communication at any time, greatly made things convenient for consumer's use.
Can realize in the mobile phone products of dual-mode dual-standby at present; The processor that has a series products to be adopted only can be supported the double-mode single-standby pattern; If on hardware platform, realize double-mode and double-standby function based on this processor design; Then need add the auxiliary modulator-demodulator of a cover, realize that two net even numbers are simultaneously online.The hardware platform that designs with the MSM8x55 processor based on Qualcomm is that example describes, though high pass MSM8x55 platform can be realized the GSM conversation, can only realize the double-mode single-standby function.If make two mobile phone cards standby simultaneously of supporting CDMA and GSM network, then need add a cover gsm module, be used to realize GSM conversation and data service.Adopt this hardware circuit design scheme, need on such hardware platform, set up corresponding voice-frequency channel and circuit setting, to satisfy the audio signal transmission requirement under the different call modes for gsm module.Present voice-frequency channel design; When carrying out calling record; All be to utilize gsm module to carry out calling record; And will synthesize good two-way call recording data and send to application processor one side through serial ports, carry out the conversion process of data format through application processor after, save as recording file according to certain format.This implementation need all will increase corresponding design of hardware and software in application processor one side and gsm module one side; Not only increased research staff's workload; And when adopting gsm module to record; The adjustment process of recording parameter also can be very loaded down with trivial details, therefore, is not a kind of desirable voice-frequency channel design.
Summary of the invention
The utility model has proposed a kind of audio transmission circuit to the assisted modulation demodulator design to adopting the double-mode single-standby processor to add the dual-mode dual-standby hardware platform of assisted modulation demodulator design, to simplify Recording Process, reduces research staff's workload.
For solving the problems of the technologies described above, the utility model adopts following technical scheme to be achieved:
A kind of audio transmission circuit; Being applied in to adopt supports the processor of double-mode single-standby to add on the dual-mode dual-standby hardware platform of an assisted modulation demodulator design; Be used for the call voice through said assisted modulation demodulator transmitting-receiving is transmitted, in said audio transmission circuit, comprise codec, application processor and memory; This machine voice signal that picks up through microphone transfers to after said assisted modulation demodulator modulates on the one hand, via antenna emission output, transfers on the other hand after codec handles, and sends to application processor; The other side's voice signal is via said assisted modulation demodulator receiving demodulation and be sent to after said codec handles, and through loud speaker or receiver output, sends to application processor on the other hand on the one hand; The two-way recording data of this machine voice that said application processor will receive and the other side's phonetic synthesis are saved in the memory.
Wherein, In said codec, be built-in with analog to digital converter; Receive this machine voice signal and the other side's voice signal of microphone and the output of assisted modulation demodulator respectively through said analog to digital converter, and then after converting digital signal to, send to described application processor.
Further, said application processor connects master chip, and synthetic two-way recording data are written in the described memory through master chip.
Further again, said master chip reads the recording data in the memory when carrying out the playback operation, and sends to after digital to analog converter converts analog signal to through application processor, through loud speaker or receiver output.
Preferably, said digital to analog converter is built in the codec.
Wherein, said microphone can comprise this machine microphone and ear microphone, respectively with corresponding connection of two-way microphone interface of codec and assisted modulation demodulator.
Further again, said receiver comprises this machine receiver and headset earpiece, the corresponding connection of three road audio output interfaces of said machine receiver, headset earpiece and this machine loud speaker and codec.
Preferably, said dual-mode dual-standby hardware platform is supported CDMA and two kinds of network formats of GSM, and said assisted modulation demodulator is the modulator-demodulator based on the GSM network.
Further, in said dual-mode dual-standby hardware platform, through CDMA module reception the other side's voice signal and after carrying out demodulation, transfer to said application processor and carry out Audio Processing, and then be sent to loud speaker or receiver output through codec.
Based on above-mentioned audio transmission circuit structure; The utility model also provides a kind of double-mode double-standby mobile terminal that adopts said audio transmission circuit design; The processor of said portable terminal employing support double-mode single-standby adds an assisted modulation demodulator design and becomes the dual-mode dual-standby hardware platform, comprises master chip, microphone, loud speaker, earphone, codec, application processor and memory; For call voice through said assisted modulation demodulator transmitting-receiving; Its audio transmission circuit is designed to: this machine voice signal that picks up through microphone transfers to after said assisted modulation demodulator modulates on the one hand; Via antenna emission output, converse, transfer on the other hand after codec handles; Send to application processor, be used for recording; The other side's voice signal is via said assisted modulation demodulator receiving demodulation and be sent to after said codec handles, and through loud speaker or receiver output, realizes answering on the one hand, sends to application processor on the other hand, is used for recording; The two-way recording data of this machine voice that said application processor will receive and the other side's phonetic synthesis are saved in the memory, accomplish the calling record function.
Compared with prior art; The advantage and the good effect of the utility model are: adopt the audio transmission via design scheme of the utility model can utilize codec to realize the two-way collection of call voice; And then, accomplish sound-recording function for application processor provides the recording data.This design is compared through serial ports and preserved the traditional approach of recording data from the assisted modulation demodulator, and is simple more efficient aspect the adjustment of recording parameter.And; When adopting the assisted modulation demodulator to carry out voice call, can also realize the switching of earphone, receiver and three voice-frequency channels of loud speaker through codec, need not externally increases diverter switch in the circuit; Simplify circuit design, reduced research staff's workload.
After the detailed description in conjunction with advantages the utility model execution mode, other characteristics of the utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the schematic block circuit diagram of a kind of embodiment of the audio transmission circuit that proposes of the utility model;
Fig. 2 is based on the schematic block circuit diagram of a kind of embodiment of the audio signal transmission path of double-mode single-standby hardware platform.
Embodiment
Describe in detail below in conjunction with the embodiment of accompanying drawing the utility model.
Embodiment one; Present embodiment is to present some double-mode double-standby mobile terminal; Adopt the processor of only supporting the double-mode single-standby pattern; Overlap the situation that the assisted modulation demodulator designs the dual-mode dual-standby hardware platform through adding one, proposed a kind of audio transmission circuit design of transmitting and recording to call voice through said assisted modulation demodulator transmitting-receiving.This scheme will utilize codec to sample through the other side's voice signal that the assisted modulation demodulator receives; And then together transfer to application layer one side together with this machine voice signal that receives via microphone; After the synthetic two-way recording data of application processor; Export memory to and preserve, realize sound-recording function.This design is owing to adopt codec to gather the double-directional speech data; Realize two-way recording operation; Adjustment for recording parameter can be accomplished in application processor; This compares tradition and passes through serial ports is preserved the recording data from the assisted modulation demodulator existing design, and its Recording Process is simple more efficient, makes things convenient for the technical staff to implement.
Be example with double model double standby phone below based on CDMA and GSM network; Suppose that its assisted modulation demodulator that adds is the modulator-demodulator based on the GSM network, the audio transmission via design of then being carried out to the GSM modulator-demodulator can be referring to following detailed description.
In conjunction with shown in Figure 1, when user's selection is conversed through the GSM network, will transfer to GSM modulator-demodulator and codec respectively through this machine user voice signal that microphone picks up.In the present embodiment, said microphone can specifically comprise this machine microphone MIC1 that is installed on the handset shell and be installed in the ear microphone MIC2 on the Headphone accessory.When the user selects conventional call mode or hand-free call pattern; This machine of utilization microphone MIC1 picks up this machine user's voice signal, and after converting analog electrical signal to, road microphone interface MIC1 via the GSM modulator-demodulator sends into the GSM modulator-demodulator on the one hand; After utilizing the built-in audio process of GSM modulator-demodulator to carry out simple signal processing; Be modulated into high-frequency signal through the GSM modulator-demodulator, and then be transmitted to the other side, realize both sides' voice call via antenna.On the other hand; Be sent to the adjusting control of the size that gains in the codec simultaneously via one road microphone interface MIC1 of codec through this machine voice signal of this machine microphone MIC1 output; Then through being built in after analog to digital converter ADC converts analog voice signal into digital signal in the codec; Send to application processor, to realize the calling record function.In the present embodiment, said application processor preferably adopts digital signal processor DSP to accomplish the synthetic processing of speech data.
Same; When the user selects to adopt earphone and the other side to converse, then utilize the microphone MIC2 on the earphone to pick up the voice that this machine user sends, and after converting analog electrical signal to; Other one road microphone interface MIC2 via the GSM modulator-demodulator is sent in the GSM modulator-demodulator on the one hand; Through the GSM modulator-demodulator carry out simple Audio Signal Processing with the modulation after, output high-frequency signal be transmitted to the other side via antenna, carry out voice call.On the other hand, in order to realize sound-recording function, will be sent in the codec via other one road microphone interface MIC2 of codec simultaneously through this machine voice signal that ear microphone MIC2 picks up, with the adjusting and the control of the size that gains; Utilize then to be built in after analog to digital converter ADC becomes digital signal with this machine user speech by analog signal conversion in the codec, send to application processor, to carry out calling record.
For the other side's voice signal that sends through the GSM network, then, be sent to the LINEIN interface of codec through the output interface HPOUT of GSM modulator-demodulator at first via after the reception of GSM modulator-demodulator and being demodulated to the low frequency analog electrical signal.After said codec carries out the gain controlling processing to the other side's voice signal that receives; The answer mode (handset mode, hands-free mode or headset mode) user-selected according to this machine switches to corresponding output interface with the audio frequency output channel on the one hand; The interface EAR that for example connects this machine receiver REV; The interface LINEOUT that perhaps connects this machine loud speaker SPK; The interface HPL&R that also perhaps connects headset earpiece HP, and then the other side's voice selecting that receives is exported to this machine user through this machine receiver REV, this machine loud speaker SPK or headset earpiece HP broadcast answer.On the other hand; For call voice is recorded; The other side's voice signal that codec is received is sent to analog to digital converter ADC simultaneously and carries out the conversion process of analog voice signal to audio digital signals after handling through gain controlling, exports described application processor then to.This machine user speech and the other side's voice that said application processor will receive synthesize processing; To generate two-way recording data; Call the two-way recording digital coding that mode that upper level applications adopts recorder will synthesize then and become needed recording format; And then export in the memory and preserve, so that transferring in the future, this machine user listens to.
In the present embodiment; For preferably under the control action of mobile phone master chip, storing through the recording file of application processor output; Promptly between application processor and memory, be connected master chip; The recording file of application processor conversion output is at first transferred to master chip, be written in the memory via master chip again, accomplish the calling record process.Said memory can adopt large-capacity storage media such as SD storage card, TF storage card, the memory requirement of speech data when satisfying extended telephone conversation.
When the user need play call voice; Man-machine interaction unit (for example keypad or touch-screen etc.) input corresponding instruction through this machine; Transfer to master chip instruct resolve after; From memory, transfer corresponding recording file, be sent to application processor then and handle, and then transfer to codec; Utilize the built-in digital to analog converter DAC of the codec data transaction of will recording to become analog signal, play output through this machine receiver REV, this machine loud speaker SPK or headset earpiece HP.Play selected calling record as for selecting which bar audio frequency output channel; Can be by the play mode generation respective via switching command of master chip according to this machine user input; And then export described codec to, to realize selection switching to each bar audio frequency output channel.
Certainly; Above-mentionedly be used for that voice signal is carried out ADC and DAC that analog-to-digital conversion or digital-to-analogue conversion handle and also can select independently switching device for use; Adopt and the external mode constructing system circuit of codec; Can satisfy the processing requirements to voice signal equally, present embodiment does not specifically limit this.
To audio signal through the transmitting-receiving of GSM modulator-demodulator; Present embodiment proposes the design of above-mentioned audio transmission path; Adopt this design when carrying out the calling record operation; Can utilize codec to gather the double-directional speech signal, and then, accomplish Recording Process for application processor provides two-way recording data.This compares tradition and utilizes the GSM modulator-demodulator that the design of recording data is provided, and its Recording Process is simple more efficient, has alleviated technical staff's workload greatly.
As for the audio transmission path to the cdma network design, present embodiment adopts circuit design scheme as shown in Figure 2, and its audio transmission path is different from above-mentioned GSM pattern.Specifically; When user's selection is conversed through cdma network; After utilizing CDMA module in the cell phone platform to receive the other side's voice signal and carry out demodulation process, at first transfer to application processor and carry out Audio Processing, and then be sent to codec and carry out gain controlling; Audio signal after the processing selects the suitable audio output channel to play the other side's voice under the passage switching controls of codec.Promptly when selecting conventional answer mode, export via this machine receiver REV; When selecting hands-free answer mode, export via this machine loud speaker SPK; And when selecting the earphone receiving pattern, then play output the other side voice via headset earpiece HP, realize pickup feature.
After then picking up for this machine user's voice signal via this machine microphone MIC1 or ear microphone MIC2; After utilizing acoustical-electrical transducer spare in the microphone to convert analog electrical signal to; At first transfer to codec and carry out gain controlling, export application processor then to and carry out Audio Processing, and then after modulating through the CDMA module; Give the other side via antenna transmission, realize call function.
When carrying out the calling record operation, can directly utilize application processor that the both sides' voice signal that receives is synthesized processing, and be encoded into the recording file of required form, and then under the coordination control of master chip, be written in the memory, realize sound-recording function.
Certainly, the audio transmission circuit that present embodiment proposed also can be applied in the double-mode double-standby mobile terminal based on CDMA and PHS network, and perhaps in the double-mode double-standby mobile terminal based on GSM and PHS network, present embodiment does not specifically limit this.
Should be noted that; The above only is a kind of preferred implementation of the utility model; For those skilled in the art; Under the prerequisite that does not break away from the utility model principle, can also make some improvement and retouching, these improvement and retouching also should be regarded as the protection range of the utility model.
Claims (10)
1. audio transmission circuit; Being applied in to adopt supports the processor of double-mode single-standby to add on the dual-mode dual-standby hardware platform of an assisted modulation demodulator design; Be used for the call voice through said assisted modulation demodulator transmitting-receiving is transmitted, it is characterized in that: comprise codec, application processor and memory; This machine voice signal that picks up through microphone transfers to after said assisted modulation demodulator modulates on the one hand, via antenna emission output, transfers on the other hand after codec handles, and sends to application processor; The other side's voice signal is via said assisted modulation demodulator receiving demodulation and be sent to after said codec handles, and through loud speaker or receiver output, sends to application processor on the other hand on the one hand; The two-way recording data of this machine voice that said application processor will receive and the other side's phonetic synthesis are saved in the memory.
2. audio transmission circuit according to claim 1 is characterized in that: said application processor connects master chip, and synthetic two-way recording data are written in the described memory through master chip.
3. audio transmission circuit according to claim 2; It is characterized in that: said master chip is when carrying out the playback operation; Read the recording data in the memory, and send to after digital to analog converter converts analog signal to, through loud speaker or receiver output through application processor.
4. audio transmission circuit according to claim 3 is characterized in that: said digital to analog converter is built in the codec.
5. audio transmission circuit according to claim 1; It is characterized in that: in said codec, be built-in with analog to digital converter; Receive this machine voice signal and the other side's voice signal of microphone and the output of assisted modulation demodulator respectively through said analog to digital converter; And then after converting digital signal to, send to described application processor.
6. according to each described audio transmission circuit in the claim 1 to 5, it is characterized in that: said microphone comprises this machine microphone and ear microphone, respectively with corresponding connection of two-way microphone interface of codec and assisted modulation demodulator.
7. according to each described audio transmission circuit in the claim 1 to 5; It is characterized in that: said receiver comprises this machine receiver and headset earpiece, the corresponding connection of three road audio output interfaces of said machine receiver, headset earpiece and this machine loud speaker and codec.
8. according to each described audio transmission circuit in the claim 1 to 5, it is characterized in that: said dual-mode dual-standby hardware platform is supported CDMA and two kinds of network formats of GSM, and said assisted modulation demodulator is the modulator-demodulator based on the GSM network.
9. audio transmission circuit according to claim 8; It is characterized in that: in said dual-mode dual-standby hardware platform; Through CDMA module reception the other side's voice signal and after carrying out demodulation; Transfer to said application processor and carry out Audio Processing, and then be sent to loud speaker or receiver output through codec.
10. a double-mode double-standby mobile terminal comprises master chip, microphone, loud speaker and earphone; It is characterized in that: also comprise like the described audio transmission circuit of each claim in the claim 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220099962.3U CN202602759U (en) | 2012-03-16 | 2012-03-16 | Audio transmission circuit and dual-mode dual-standby mobile terminal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201220099962.3U CN202602759U (en) | 2012-03-16 | 2012-03-16 | Audio transmission circuit and dual-mode dual-standby mobile terminal |
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| CN202602759U true CN202602759U (en) | 2012-12-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322234A (en) * | 2017-01-12 | 2018-07-24 | 上海卓旭电子科技有限公司 | Chinese Railway GSM-R single/double mode hand-hold terminal systems |
| CN111383632A (en) * | 2018-12-28 | 2020-07-07 | 北京小米移动软件有限公司 | Electronic device |
-
2012
- 2012-03-16 CN CN201220099962.3U patent/CN202602759U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108322234A (en) * | 2017-01-12 | 2018-07-24 | 上海卓旭电子科技有限公司 | Chinese Railway GSM-R single/double mode hand-hold terminal systems |
| CN108322234B (en) * | 2017-01-12 | 2024-01-30 | 上海卓旭电子科技有限公司 | Chinese railway GSM-R dual-mode handheld terminal system |
| CN111383632A (en) * | 2018-12-28 | 2020-07-07 | 北京小米移动软件有限公司 | Electronic device |
| CN111383632B (en) * | 2018-12-28 | 2023-10-31 | 北京小米移动软件有限公司 | Electronic equipment |
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| CX01 | Expiry of patent term |