CN101360141A - Mobile terminal with multiple voice recording function - Google Patents
Mobile terminal with multiple voice recording function Download PDFInfo
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- CN101360141A CN101360141A CNA2008100427228A CN200810042722A CN101360141A CN 101360141 A CN101360141 A CN 101360141A CN A2008100427228 A CNA2008100427228 A CN A2008100427228A CN 200810042722 A CN200810042722 A CN 200810042722A CN 101360141 A CN101360141 A CN 101360141A
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- multimedia processor
- earphone
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- mike
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Abstract
The invention discloses a mobile terminal with a plurality of sound recording functions, comprising a multimedia processor for combining a recording of the mobile terminal to an MP3 audio file, and the multimedia processor is provided with a PCM interface, a stereo audio encoder, a gain controllable amplifier, a T-flash hardware interface and an FM sound recording function. Audio signals of environmental recording are directly transmitted to the multimedia processor by a main microphone. Handset talking records are respectively transmitted to the multimedia processor through picking up signals of the main microphone and anodes of headphones, and the gain matching is implemented in the multimedia processor. The invention improves sound recording functions of mobile terminal platforms that have no PCM interface and hardware MP3 encoder, and processes the recorded audio into MP3 files with better sound quality and universality.
Description
Technical field
The present invention relates to portable terminal, particularly a kind of portable terminal with multiple sound-recording function, this portable terminal have the processing capacity of environment recording, FM/Line-IN recording, conversation (hand-held conversation, earphone conversation, bluetooth conversation) recording.
Background technology
Audio format commonly used in the portable terminal has a variety of: MIDI, ADPCM, AMR, MP3, WAV etc.Wherein, AMR full name Adaptive Multi-Rate, adaptive multi-rate coding, be mainly used in the audio frequency of mobile device, compression ratio is bigger, but other compressed format mass ratio is relatively poor relatively, be used for voice, conversation more, be not suitable for the compression of music class audio frequency that tonequality is had relatively high expectations.MP3 full name MPEG Audio Layer 3 is a kind of encoding schemes of computer audio efficiently, converts audio file to file that less expansion is called .MP3 with bigger compression ratio, keeps the tonequality of original substantially, liked by users.
In numerous mobile-terminal platforms, some mobile-terminal platform does not have pcm interface and hardware MP3 encoder, as spreadtrum, siliconlab etc., its environment recording, calling record etc. substantially all are the files of recording into the AMR form, rather than MP3 format, relative MP3 format, the AMR file takies less memory space, but its versatility and tonequality but can not show a candle to the MP3 format file.In addition, these mobile-terminal platforms do not have plug-in tape pulse coded modulation (Pulse-codemodulation, hereinafter to be referred as PCM) the CODEC encoder (as WM8991) of interface, just can not realize Bluetooth transmission, perhaps can only be existing by the UART cause for gossip, as spreadtrum SC6600D platform is exactly by the existing Bluetooth communication of UART cause for gossip, because UART communication speech transmission rate is too slow, so cause SC6600D can not realize the recording of bluetooth earphone conversation.
The FM broadcast receiver almost is the standard configuration of present portable terminal, when the user listens to FM, when hearing favorite program or music, can record.And in some mobile-terminal platforms such as spreadtrum, all it is recorded as the AMR form.
The advantage of above-mentioned mobile-terminal platform is that price is lower, if can but the bluetooth of realization calling record be arranged on the lower mobile-terminal platform of above-mentioned defective price at these, and with environment recording, FM/Line-IN recording, recording all is treated to mp3 file will be popular in conversation (hand-held conversation, earphone conversation, bluetooth conversation).
Summary of the invention
For overcoming the deficiency of above-mentioned prior art, the technical problem to be solved in the present invention provides a kind of portable terminal with multiple sound-recording function, improving the sound-recording function that some do not have the mobile-terminal platform of pcm interface and hardware MP3 encoder, and be tonequality and the better mp3 file of versatility with the Audio Processing of being recorded.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of portable terminal with multiple sound-recording function, comprise baseband chip, bluetooth module, bluetooth earphone and bluetooth Mike, main Mike and receiver, earphone and earphone Mike, T-flash card, described baseband chip links to each other with described main Mike and receiver, earphone and earphone Mike respectively.
This portable terminal also comprises multimedia processor, synthesize the MP3 audio file in order to recording with this portable terminal, described multimedia processor has amplifier, T-flash hardware interface and the FM sound-recording function of pcm interface, stereo audio coding device, controllable gain
The audio signal of environment recording directly is sent to described multimedia processor by described main Mike;
Hand-held calling record is sent to described multimedia processor respectively by the signal that picks up main Mike and receiver positive pole, and the coupling that gains in described multimedia processor;
The signal of earphone Mike and earphone auris dextra is input to described multimedia processor by a two-way analog switch U2 in the left and right acoustic channels of FM/Line-IN recorded audio signals and the earphone conversation; This analog switch U2 is by the signal controlling of baseband chip output, and when FM/Line-IN recorded, this signal was a low level; When the earphone calling record, this signal is a high level;
The upstream tones digital signal that described bluetooth module transmits described bluetooth earphone Mike, send described multimedia processor to by pcm interface, this multimedia processor sends described baseband chip to through analog switch U1 after this upward signal is carried out the DA conversion;
Described baseband chip output downstream tones signal is to described multimedia processor and receiver, and described multimedia processor carries out AD conversion back and sends described bluetooth module to by pcm interface, finally sends bluetooth earphone to.
Described baseband chip adopts spreadtrum SC6600D chip.
Described multimedia processor adopts the AIT706 chip.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention has the portable terminal of multiple sound-recording function, be primarily aimed at the mobile-terminal platform that some do not have pcm interface and hardware MP3 encoder, SC6600D as spreadtrum, the synthetic processing of its recording mainly depends on external multimedia processor, this multimedia processor itself has pcm interface, can carry out PCM with bluetooth module and communicate by letter, so that realize bluetooth file transfer and conversation.All recording of system comprise environment recording, hand-held/the earphone calling record, FM/Line-IN recording, bluetooth calling record etc., finally all synthesize tonequality MP3 audio file preferably.
Description of drawings
Fig. 1 is the general illustration of portable terminal of the present invention;
Fig. 2 is the signal flow block diagram of environment recording, FM/Line-IN recording, hand-held conversation and the earphone calling record of portable terminal of the present invention, and solid arrow is a recorded audio signals stream among the figure;
Fig. 3 is the bluetooth calling record system block diagram of portable terminal of the present invention;
Fig. 4 locates commutation circuit for the bluetooth conversation Mike of portable terminal of the present invention.
Embodiment
Specific embodiments of the present invention are further described in detail below in conjunction with drawings and Examples, but should not limit protection scope of the present invention with this.
Recording processing scheme provided by the invention is primarily aimed at some mobile-terminal platforms that do not have pcm interface and hardware MP3 encoder, be example now with SC6600D chip as spreadtrum, the synthetic processing of its recording mainly depends on external multimedia processor, and existing is example with multimedia processor employing AIT706 chip.This multimedia processor itself has pcm interface, can carry out PCM with bluetooth module and communicate by letter, so that realize bluetooth file transfer and conversation.All recording of mobile terminal system (comprising environment recording, hand-held/the earphone calling record, FM/Line-IN recording, bluetooth calling record etc.) processing capacity is all finished by this external multimedia processor, and is finally synthesized tonequality MP3 audio file preferably.
Described multimedia processor must possess the stereo audio coding device of 16-bit, 48k sampling, to realize Mike's input and audio frequency output.
In addition, multimedia processor inside also need possess the amplifier that can directly drive external earpiece and Mike's controllable gain, with flexible receiver and Mike's volume gain, makes synthetic receiver and Mike's audio volume size consistent.
Multimedia processor also need possess the FM sound-recording function.
At last, multimedia processor also need possess the T-flash hardware interface, so that realize the mp3 file management by multimedia processor.
See also the general illustration of Fig. 1 portable terminal of the present invention, the present invention has the portable terminal of sound-recording function, comprise baseband chip, bluetooth module, bluetooth earphone and bluetooth Mike, main Mike and receiver, earphone and earphone Mike, T-flash card, described baseband chip links to each other with described main Mike and receiver, earphone and earphone Mike respectively.
This portable terminal also comprises multimedia processor, synthesizes the MP3 audio file in order to the recording with this portable terminal, is saved on the T-flash card.Described multimedia processor has amplifier, T-flash hardware interface and the FM sound-recording function of pcm interface, stereo audio coding device, controllable gain.
The audio signal of environment recording directly is sent to the AU_LIN pin of described multimedia processor by described main Mike;
Hand-held calling record is sent to AU_LIN and the AU_RIN pin of AIT706 respectively by the signal that picks up main Mike and receiver positive pole, because the signal on the main Mike is compared too little with the signal on the receiver, coupling need gain in AIT706, main Mike's signal gain is suitably become big, the volume that makes the volume of main Mike in the signal of recording out and receiver quite till.As shown in Figure 4, model is that the control signal BT_RECORD_SW of the analog switch U1 of PI3A223 is a high level, and this control signal comes from baseband chip SC6600D, passes to SC6600D from Mike's differential signal MICP and MICN behind analog switch U1.
The signal of earphone Mike and earphone auris dextra is input to described multimedia processor AUX_L and AUX_R pin by a two-way analog switch U2 in the left and right acoustic channels of FM/Line-IN recorded audio signals and the earphone conversation; The HEAD/OTHER_EN signal controlling that this analog switch U2 exports by baseband chip, when FM/Line-IN records, HEAD/OTHER_EN=0; When the earphone calling record, HEAD/OTHER_EN=1;
Bluetooth conversation implementation procedure is as follows:
As shown in Figure 4, after bluetooth module receives the upstream tones digital signal that bluetooth earphone transmits, send multimedia processor AIT706 to by pcm interface, AIT706 carries out DA conversion back with this upward signal and exports from the AU_ROUT pin, through analog switch U1, send SC6600D to by MICP-IN and MICP-IN, this has just realized bluetooth Mike's ascending voice transmission.This moment, the control signal BT_RECORD_SW of U1 was a low level.
Spreadtrum SC6600D exports the downstream tones signal to AIT706 and receiver from AUXSPP and AUXSPN/HEAD_R pin, what AIT706 gathered is the signal of AUXSPN/HEAD_R pin, carry out AD conversion back then in inside and send bluetooth module to by pcm interface, finally send bluetooth earphone to, realized the downlink voice transmission thus.
According to above process, there are two kinds of methods can realize the bluetooth calling record.
Method one: finish by SC6600D.SC6600D synthesizes the audio file that is treated to the AMR form to ascending voice signal and the downlink voice signal that finally transmits by bluetooth and AIT706, is stored in T-Flash.
Method two: finish by AIT706.As shown in Figure 3, the upstream tones signal receives by bluetooth PCM transmission, the downstream tones signal directly comes from the AUXSPN/HEAD_R pin of SC6600D, the two-way audio signal synthesizes AMR or MP3 audio file by AIT706, depend on bluetooth PCM transmission rate,, just can synthesize the MP3 audio file if bluetooth PCM transmission rate is higher, if bluetooth PCM transmission rate is lower, just can synthesize the AMR audio file.
The present invention adopts method two to realize the bluetooth calling record, mainly contains following advantage:
The first, because being connected on AIT706 by parallel interface, T-Flash goes up (if receive on the SC6600D, can only adopt the SPI interface, access speed is slower), more convenient by the AIT706 visit, the storage of recording file and reading than being easier to;
The second, the bluetooth calling record can save as AMR or MP3 format, and method one can only be processed into the AMR form.
In sum, the recording processing method of portable terminal provided by the invention can successfully be treated to tonequality MP3 audio file preferably with environment recording, FM/Line-IN recording, hand-held conversation and earphone calling record.
The above is preferred embodiment of the present invention only, is not to be used for limiting practical range of the present invention.Be that all equivalences of doing according to the content of the present patent application claim change and modification, all should be technology category of the present invention.
Claims (3)
1, a kind of portable terminal with multiple sound-recording function, comprise baseband chip, bluetooth module, bluetooth earphone and bluetooth Mike, main Mike and receiver, earphone and earphone Mike, T-flash card, described baseband chip links to each other with described main Mike and receiver, earphone and earphone Mike respectively, it is characterized in that:
This portable terminal also comprises multimedia processor, synthesize the MP3 audio file in order to recording with this portable terminal, described multimedia processor has amplifier, T-flash hardware interface and the FM sound-recording function of pcm interface, stereo audio coding device, controllable gain
The audio signal of environment recording directly is sent to described multimedia processor by described main Mike;
Hand-held calling record is sent to described multimedia processor respectively by the signal that picks up main Mike and receiver positive pole, and the coupling that gains in described multimedia processor;
The signal of earphone Mike and earphone auris dextra is input to described multimedia processor by a two-way analog switch U2 in the left and right acoustic channels of FM/Line-IN recorded audio signals and the earphone conversation; This analog switch U2 is by the signal controlling of baseband chip output, and when FM/Line-IN recorded, this signal was a low level; When the earphone calling record, this signal is a high level;
The upstream tones digital signal that described bluetooth module transmits described bluetooth earphone Mike, send described multimedia processor to by pcm interface, this multimedia processor sends described baseband chip to through analog switch U1 after this upward signal is carried out the DA conversion;
Described baseband chip output downstream tones signal is to described multimedia processor and receiver, and described multimedia processor carries out AD conversion back and sends described bluetooth module to by pcm interface, finally sends bluetooth earphone to.
2, portable terminal according to claim 1 is characterized in that described baseband chip adopts spreadtrum SC6600D chip.
3, portable terminal according to claim 1 is characterized in that described multimedia processor adopts the AIT706 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100427228A CN101360141A (en) | 2008-09-10 | 2008-09-10 | Mobile terminal with multiple voice recording function |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100427228A CN101360141A (en) | 2008-09-10 | 2008-09-10 | Mobile terminal with multiple voice recording function |
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| CN101360141A true CN101360141A (en) | 2009-02-04 |
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| CNA2008100427228A Pending CN101360141A (en) | 2008-09-10 | 2008-09-10 | Mobile terminal with multiple voice recording function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931680A (en) * | 2010-05-25 | 2010-12-29 | 无锡中星微电子有限公司 | Bluetooth system |
| WO2012051870A1 (en) | 2010-10-22 | 2012-04-26 | 惠州Tcl移动通信有限公司 | Method for bluetooth-based headset to make video call and video call enabled terminal |
-
2008
- 2008-09-10 CN CNA2008100427228A patent/CN101360141A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931680A (en) * | 2010-05-25 | 2010-12-29 | 无锡中星微电子有限公司 | Bluetooth system |
| CN101931680B (en) * | 2010-05-25 | 2013-08-28 | 无锡中星微电子有限公司 | Bluetooth system |
| WO2012051870A1 (en) | 2010-10-22 | 2012-04-26 | 惠州Tcl移动通信有限公司 | Method for bluetooth-based headset to make video call and video call enabled terminal |
| US8885011B2 (en) | 2010-10-22 | 2014-11-11 | Huizhou Tcl Mobile Communication Co., Ltd. | Method for implementing video call with bluetooth-based headset and video communication terminal for the same |
| EP3726924A1 (en) | 2010-10-22 | 2020-10-21 | Huizhou TCL Mobile Communication Co., Ltd. | Method for implementing video call with bluetooh-based headset and video communication terminal for the same |
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Open date: 20090204 |