CN1738320A - Handset for playing music in calling course and its method - Google Patents
Handset for playing music in calling course and its method Download PDFInfo
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- CN1738320A CN1738320A CN 200510035797 CN200510035797A CN1738320A CN 1738320 A CN1738320 A CN 1738320A CN 200510035797 CN200510035797 CN 200510035797 CN 200510035797 A CN200510035797 A CN 200510035797A CN 1738320 A CN1738320 A CN 1738320A
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Abstract
The invention discloses a mobile phone which can play music in the process of conversation, comprising: a central processing unit, a microphone, a communication module and an audio multimedia digital signal encoder/decoder. When the mobile phone is in the process of conversation, the central processing unit accesses the inlet of audio multimedia digital signal encoder/decoder; the microphone accesses another inlet of audio multimedia digital signal encoder/decoder; the output of audio multimedia digital signal encoder/decoder is accessed by the microphone inlet of communication module. The invention also discloses its relative method, comprising: when the mobile phone is in the process of conversation, user can select any stored music document which is encoded by the central processing unit and transmitted to the audio multimedia digital signal encoder/decoder which will send processed music document via communication module; when the receiving end receives the processed signal, user can listen the collected music which is wanted to be shared. The invention can improve the flexibility of mobile phone conversation significantly.
Description
Technical field
The present invention relates to a kind of in communication process the mobile phone and the method thereof of playing back music.
Background technology
The process of mobile phone to play music is: the music file that stores in the mobile phone is transferred to central processing unit (centralprocessing unit, CPU) decode, thereby the pulse code modulation that obtains (Pulse Code Modulation, PCM) data, these data are delivered on the Audio Codec (audiocodec) by digital audio interface, and the differential signal of audio codec output is directly inputted to the built-in loudspeaker broadcast of mobile phone then.
The process of mobile phone speech conversation is: the caller from the transmission of sound signals of microphone input to audio codec, the differential signal of audio codec output is directly inputted to global system for mobile communications (Global Systemfor Mobile Communications then, GSM) module Mike input port, be the sound input end mouth of the communication module of mobile phone, thereby send to the receiving terminal of conversation.
Above dual mode all can not be put this machine music to the other side and listen.
At publication number is CN1370372A, application number is 00811904.x, in the international patent application of " telephone terminal and communication means " by name, can be implemented in the music of having powerful connections in the conversation, according to the 7th page the 4th section in its specification, its technical scheme is with " the conversation voice signal that transmits from the purpose of microphone 21 inputs converts digital signal to by analog to digital converter (ADC) 42, and this digital signal offers blender 44 by coefficient multiplier 43.The tone signal that is reproduced by reproducing music module 15 offers blender 44 by coefficient multiplier 45.The encoder 46 of the output of blender 44 by CELP for example (LPC of sign indicating number excitation) scheme be with high efficiency mode compressed encoding, and offer communication module 13 and be used for transmitting from antenna 1a.The voice signal of communication module 13 demodulation of receiving is decoded by the decoder 48 of for example CELP (LPC of sign indicating number excitation) from high efficiency and compressed encoding form.Decoded signal is converted to analog signal by digital to analog converter (DAC), and offers reproducing music module 15." still; since now the communication module of mobile phone be radio frequency integrated A/D converter; if be implemented in the music of having powerful connections in the conversation; then need earlier to enter communication module and be converted to digital signal; this digital signal offers blender by coefficient multiplier; after blender mixes this digital signal and tone signal, enter communication module again and encode and launch from the conversation voice signal of the purpose transmission of microphone input according to disclosed technical scheme in the foregoing invention patent application.Because communication module emission high-frequency signal, therefore the mode of being undertaken being mixed by blender again after the analog-to-digital conversion by communication module can cause great interference to the transmission of mobile phone internal data.
Summary of the invention
Purpose of the present invention is exactly in order to overcome the above problems, provide a kind of in communication process the mobile phone and the method thereof of playing back music.
For achieving the above object, the present invention proposes, a kind of in communication process the mobile phone of playing back music, comprise central processing unit, microphone and communication module and Audio Codec, when mobile phone is in communication process, central processing unit is transferred to Audio Codec by the input of digital audio interface connection Audio Codec after the music file that central processing unit stores up mobile phone EMS memory is decoded as pulse code modulation data; Microphone is connected another input of Audio Codec, and microphone is transferred to Audio Codec with the caller's that receives voice signal; The output of Audio Codec is connected Mike's input of communication module, Audio Codec with pulse code modulation data be converted to analog signal and be transferred to communication module after caller's voice signal mixes.
Described Audio Codec comprises D/A converter and blender, central processing unit links to each other by digital audio interface with the input of D/A converter, the output of D/A converter links to each other with an input of blender, microphone links to each other with another input of blender, and the output of blender links to each other with Mike's input of communication module.
Described Audio Codec also comprises difference channel, and described difference channel is connected between Mike's input of the output of blender and communication module.
A kind of in the mobile phone communication process method of playing back music, comprise the steps,
Music file is handled: when mobile phone is in communication process, be transferred to Audio Codec after the music file that central processing unit stores up mobile phone EMS memory is decoded as pulse code modulation data;
Voice signal is handled: microphone is transferred to Audio Codec with the caller's that receives voice signal;
Coding step: the described pulse code modulation data that Audio Codec will receive is converted to analog signal, and the pulse code modulation data after will changing be transferred to communication module after caller's voice signal mixes;
Transmitting step: communication module sends to the communication module of receiving terminal with the mixed signal that receives, and the communication module of receiving terminal is come out this mixed signal by loudspeaker plays.
Described coding step is specially: described Audio Codec comprises D/A converter and blender, and D/A converter receives the pulse code modulation data of central processing unit output, and is converted to analog signal; Blender mixes the caller's of pulse code modulation data after the conversion receive and microphone input voice signal, and mixed signal is transferred to Mike's input of communication module.
Comprise the steps: that also described Audio Codec also comprises difference channel before the transmitting step after the described coding step, the mixed signal of blender is converted to the Mike's input that is transferred to communication module behind the differential signal through difference channel.
Because adopted above scheme,
1, in the process of mobile phone communication, at any time can choose the music file of storage arbitrarily according to the user, by being transferred to Audio Codec behind the central processing unit coding, Audio Codec sends by communication module after handling this music file and caller's voice signal, receiving terminal just can hear from loud speaker directly that the other side wishes the collection music that oneself is shared after receiving the signal of handling, improved the flexibility of mobile phone communication greatly, and whole process all is to be realized by the low frequency device of mobile phone inside, can cause interference hardly to internal data transfer, the signal reliability height.
2, with D/A converter music file is converted to analog signal, after blender mixes the analog signal of this music file and caller's sound, be transferred to communication module, because the function of intermediate frequency that present communication module is integrated, it is digital signal that so-called intermediate frequency is about to analog signal conversion, therefore, is that digital signal sends to receiving terminal then with communication module with mixed conversion of signals, the function that makes full use of existing each module of mobile phone realizes purpose of the present invention, so, when practical application, change little to existing mobile phone, practical, market prospects are big.
3, further integrated difference channel in Audio Codec, because differential signal is meant that single line is with positive level mode transmission signals, single line transmits same signal in the negative level mode in addition, when interference signal occurring in the circuit, its influence to two lines is identical, thereby when receiving terminal reduction differential signal, just can eliminate the electromagnetic interference of two balanced signals transmitting on the differential line, thereby can improve the noise resisting ability that blender mixes the back signal.
Description of drawings
Also the present invention is described in further detail in conjunction with the accompanying drawings below by specific embodiment.
Fig. 1 is the embodiment of the invention one schematic diagram.
Fig. 2 is a schematic flow sheet of the present invention.
Fig. 3 is the embodiment of the invention two schematic diagrams.
Embodiment
Embodiment, as shown in Figure 1, a kind of in communication process the mobile phone of playing back music, comprise CPU1, D/A converter 2, blender 3, microphone 4 and gsm module 5, gsm module 5 is the radio frequency that the communication module of mobile phone is just said usually; During the conversation, the input of CPU1 and D/A converter 2 is connected by digital audio interface, an input of the output of D/A converter 2 and blender 3 is connected, and microphone 4 is connected with another input of blender 3, and Mike's input of the output of blender 3 and gsm module 5 is connected.Can directly adopt audio codec7 to realize the function of D/A converter and blender in the present embodiment.
The course of work:
As shown in Figure 2, during the mobile phone communication, the music file that the user selects hope to allow the other side share in communication process in the mobile phone of oneself; The CPU1 described music file of decoding is the PCM data of stereo (stereo) 16bit, and gives D/A converter 2 by digital audio interface with described PCM transfer of data; D/A converter 2 is converted to analog signal with these PCM data, and is transferred to blender 3; The mobile phone communication person is from microphone 4 input speech signals, and is transferred to blender 3; The output of blender 3 offers Mike's input of gsm module 5, and the mixed signal of blender 3 outputs is converted to digital signal in gsm module 5, and this digital signal changes end by antenna transmission to connecing; The gsm module of receiving terminal receives this mixed signal and is converted to digital signal, from loud speaker, plays back then, thus the purpose of playing back music when being implemented in conversation.
As shown in Figure 3, increase difference channel 6, between the output that is connected on blender 3 and the Mike's input of gsm module 5, the mixed signal of blender 3 outputs is handled through difference channel 6 earlier, exports differential signal.Also can directly adopt audio codec7 to realize the function of D/A converter, blender and difference channel in the present embodiment.
Claims (6)
1, a kind of in communication process the mobile phone of playing back music, comprise central processing unit (1), microphone (4) and communication module (5) and Audio Codec (7), it is characterized in that: when mobile phone is in communication process, central processing unit (1) is transferred to Audio Codec (7) by the input of digital audio interface connection Audio Codec (7) after the music file that central processing unit (1) stores up mobile phone EMS memory is decoded as pulse code modulation data; Microphone (4) is connected another input of Audio Codec (7), and microphone (4) is transferred to Audio Codec (7) with the caller's that receives voice signal; The output of Audio Codec (7) is connected Mike's input of communication module (5), Audio Codec (7) with pulse code modulation data be converted to analog signal and be transferred to communication module (5) after caller's voice signal mixes.
2, according to claim 1 a kind of in communication process the mobile phone of playing back music, it is characterized in that: described Audio Codec (7) comprises D/A converter (2) and blender (3), central processing unit (1) links to each other by digital audio interface with the input of D/A converter (2), the output of D/A converter (2) links to each other with an input of blender (3), microphone (4) links to each other with another input of blender (3), and the output of blender (3) links to each other with Mike's input of communication module (5).
3, according to claim 2 a kind of in communication process the mobile phone of playing back music, it is characterized in that: described Audio Codec (7) also comprises difference channel (6), and described difference channel (6) is connected between Mike's input of the output of blender (3) and communication module (5).
4, a kind of in the mobile phone communication process method of playing back music, it is characterized in that, comprise the steps,
Music file is handled: when mobile phone is in communication process, be transferred to Audio Codec (7) after the music file that central processing unit (1) stores up mobile phone EMS memory is decoded as pulse code modulation data;
Voice signal is handled: microphone (4) is transferred to Audio Codec (7) with the caller's that receives voice signal;
Coding step: the described pulse code modulation data that Audio Codec (7) will receive is converted to analog signal, and the pulse code modulation data after will changing be transferred to communication module (5) after caller's voice signal mixes;
Transmitting step: communication module (5) sends to the communication module of receiving terminal with the mixed signal that receives, and by the communication module of receiving end this mixed signal is come out by loudspeaker plays.
5, according to claim 4 a kind of in the mobile phone communication process method of playing back music, it is characterized in that, described coding step is specially: described Audio Codec (7) comprises D/A converter (2) and blender (3), D/A converter (2) receives the pulse code modulation data of central processing unit (1) output, and is converted to analog signal; Blender (3) mixes the caller's of pulse code modulation data after the conversion receive and microphone (4) input voice signal, and mixed signal is transferred to Mike's input of communication module (5).
6, according to claim 5 a kind of in the mobile phone communication process method of playing back music, it is characterized in that, comprise the steps: that also described Audio Codec (7) also comprises difference channel (6) before the transmitting step after the described coding step, the mixed signal of blender (3) is converted to the Mike's input that is transferred to communication module (5) behind the differential signal through difference channel (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CNB200510035797XA CN100446519C (en) | 2005-07-04 | 2005-07-04 | Handset for playing music in calling course and its method |
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| CNB200510035797XA CN100446519C (en) | 2005-07-04 | 2005-07-04 | Handset for playing music in calling course and its method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1925637B (en) * | 2005-09-02 | 2011-08-10 | 乐金电子(中国)研究开发中心有限公司 | Method and apparatus for transmitting the sound of MP3 on busying in the mobile communication terminal |
| WO2011157246A2 (en) * | 2011-08-31 | 2011-12-22 | 华为终端有限公司 | Method for sharing fm audio frequency during voice communication and mobile communication terminal |
| CN102629471A (en) * | 2012-03-07 | 2012-08-08 | 深圳市福智软件技术有限公司 | Multi-decoder audio system, system signal flow and composed mobile equipment |
| WO2017101327A1 (en) * | 2015-12-18 | 2017-06-22 | 乐视控股（北京）有限公司 | Method and device for collective playback of high-fidelity sound by several players |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3719057B2 (en) * | 1999-08-24 | 2005-11-24 | ヤマハ株式会社 | Telephone terminal device and communication method |
| KR100408738B1 (en) * | 2003-04-08 | 2003-12-03 | Information Co Ltd H | Mobile terminal having effect sound/background sound output function by using engaged key button |
| CN1585536A (en) * | 2003-08-21 | 2005-02-23 | 光宝科技股份有限公司 | Method for providing environmental background sound effect by mobile phone and mobile phone therefor |
| KR100739166B1 (en) * | 2003-08-29 | 2007-07-13 | 엘지전자 주식회사 | Method for playing background/effect sound of mobile phone |
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2005
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1925637B (en) * | 2005-09-02 | 2011-08-10 | 乐金电子(中国)研究开发中心有限公司 | Method and apparatus for transmitting the sound of MP3 on busying in the mobile communication terminal |
| WO2011157246A2 (en) * | 2011-08-31 | 2011-12-22 | 华为终端有限公司 | Method for sharing fm audio frequency during voice communication and mobile communication terminal |
| WO2011157246A3 (en) * | 2011-08-31 | 2012-07-19 | 华为终端有限公司 | Method for sharing fm audio frequency during voice communication and mobile communication terminal |
| CN102742254A (en) * | 2011-08-31 | 2012-10-17 | 华为终端有限公司 | Method for sharing FM audio frequency during voice communication and mobile communication terminal |
| CN102742254B (en) * | 2011-08-31 | 2015-09-09 | 华为终端有限公司 | A kind of method and communication terminal sharing FM audio frequency in voice call process |
| CN102629471A (en) * | 2012-03-07 | 2012-08-08 | 深圳市福智软件技术有限公司 | Multi-decoder audio system, system signal flow and composed mobile equipment |
| WO2013131367A1 (en) * | 2012-03-07 | 2013-09-12 | 福兴达科技实业（深圳）有限公司 | Multi-decoder audio system, system signal procedure, and formed mobile device |
| WO2017101327A1 (en) * | 2015-12-18 | 2017-06-22 | 乐视控股（北京）有限公司 | Method and device for collective playback of high-fidelity sound by several players |
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|---|---|
| CN100446519C (en) | 2008-12-24 |
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