CN101430640A - Communication terminal with USB audio card, and method for implementing USB audio card in communication terminal - Google Patents
Communication terminal with USB audio card, and method for implementing USB audio card in communication terminal Download PDFInfo
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- CN101430640A CN101430640A CNA2007101243566A CN200710124356A CN101430640A CN 101430640 A CN101430640 A CN 101430640A CN A2007101243566 A CNA2007101243566 A CN A2007101243566A CN 200710124356 A CN200710124356 A CN 200710124356A CN 101430640 A CN101430640 A CN 101430640A
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Abstract
The invention discloses a method for a communication terminal with a USB sound card and a method used for realizing the USB sound card in the communication terminal. The communication terminal comprises a central processing unit and an analog baseband processor which are interlinked with each other. The central processing unit comprises a USB terminal controller and an I<2>S bus controller which is connected with the USB terminal controller and supports bidirectional I<2>S bus data format conversion. The analog baseband processor is internally provided with an audio frequency codec which is used for coding and decoding audio frequency data. The USB terminal controller, the I<2>S bus controller and the audio frequency codec are multiplexed to form the USB sound card. In the invention, partial functions of the central processing unit and the analog baseband processor in the communication terminal are multiplexed, so as to realize the USB sound card based on I<2>S bus, and the USB sound card can match and use the functions of multimedia such as MP3, MP4 and the like in the communication terminal, so as to ensure that the communication terminal has the application value of the multimedia furthermore.
Description
Technical field
The present invention relates to audio signal processing technique, especially relate to a kind of communication terminal of integration USB sound card, and a kind ofly do carrier, realize the method for USB sound card by multiplexing functional module wherein with communication terminals such as mobile phones.
Background technology
The USB product emerges in an endless stream in recent years, and the USB audio class has become a kind of standard of standard under the effort of USB Developers Forum, and the USB sound card also begins quietly to occur on market.Because the USB sound card is built-in audio digital to analog converter (DAC) and active power amplifier, voice data enters the USB sound card with digital form, can stop the interference of simulating signal fully, so the USB sound card might become the substitute that has built-in sound card now.
Along with the continuous maturation and the development of mobile communication technology, the use of the mobile communication terminal of mobile phone, personal electric Business Assistant personal consumption classes such as (PDA) is more and more general.Be to improve the function of communication terminal, allow the user have more multimachine can experience multimedia, multimedia functions such as MP3, MP4 that present mobile phone is integrated usually.Yet because though traditional built-in sound card can provide audio frequency effect preferably, its volume is bigger, is difficult for being integrated among the short and small portable communication terminal.Therefore, how in communication terminal, to propose a kind of technical scheme, become one of technical matters of current urgent need solution with better Audio Processing effect.
Summary of the invention
Technical matters to be solved by this invention is the method that proposes a kind of communication terminal of integration USB sound card and realize the USB sound card in communication terminal, do carrier with communication terminals such as mobile phones, realize the USB sound card by multiplexing functional module wherein, thereby improve the multimedia handling property of communication terminal.
For solving technical matters of the present invention, the present invention discloses a kind of communication terminal of the USB of having sound card, comprise the central processing unit and the analogue baseband processors of interconnection, described central processing unit comprises: usb terminal controller and be connected with described usb terminal controller, support to carry out two-way I
2The I of S bus data format conversion
2The S bus controller; The built-in audio codec that is used for voice data is carried out the encoding and decoding processing of described analogue baseband processors; Multiplexing described usb terminal controller, described I
2S bus controller and described audio codec constitute the USB sound card.
More excellent, the communication terminal that the present invention has the USB sound card also comprises audio output apparatus, its input end connects the output terminal of described audio codec.
More excellent, described audio output apparatus comprise audio output interface, loudspeaker and earphone at least one of them.
More excellent, the communication terminal that the present invention has the USB sound card also comprises audio input device, its output terminal connects the input end of described audio codec.
More excellent, described audio input device comprise audio input interface, microphone and microphone at least one of them.
In addition, the present invention discloses a kind of method that realizes the USB sound card in communication terminal, comprising:
Central processing unit in the multiplexed communications terminal and audio codec, wherein, described central processing unit comprises: USB interface, usb terminal controller and be connected with described usb terminal controller, support to carry out two-way I
2The I of S bus data format conversion
2The S bus controller;
Receive voice data by described usb terminal controller control, the parallel audio data are transferred to the serial voice data, and carry out D/A conversion back output through described audio codec by described I2S bus controller; Perhaps,, carry out the A/D conversion through described audio codec by the analog audio data of described audio codec input end input, and by described I
2After the S bus controller transfers the serial voice data to the parallel audio data, from described usb terminal controller output.
More excellent, the output terminal of described audio codec connects audio output apparatus.
More excellent, the input end of described audio codec connects audio input device.
Compared with prior art, the present invention has following beneficial effect:
The present invention has realized based on I by the central processing unit in the multiplexed communications terminal and the partial function of analogue baseband processors
2The USB sound card of S bus; The multimedia functions such as MP3, MP4 of this USB sound card in can communication terminal is used, and makes communication terminal have more the value of multimedia application.
Description of drawings
Fig. 1 is the structural representation that the present invention has the communication terminal of USB sound card.
Embodiment
Core concept of the present invention is the central processing unit in the multiplexed communications terminal and the partial function of analogue baseband processors, realizes the function of USB sound card with this.
Please refer to shown in Figure 1ly, is the structural representation that the present invention has the communication terminal of USB sound card.Communication terminal of the present invention refers in particular to the personal consumption communication facilities that can communicate, such as, the mobile phone of support GSM/GPRS communication, PDA(Personal Digital Assistant) etc.Specifically how to realize communication function, have which kind of communication structure as for communication terminal of the present invention, do not do detailed description at this; It is the function that how to realize the USB sound card that following emphasis is described communication terminal of the present invention.
Communication terminal of the present invention is to finish basic communication function, comprises at least: interconnective central processing unit 110 and the built-in analogue baseband processors 120 that is used for voice data is carried out the audio codec 121 of encoding and decoding processing.Described central processing unit 110 can be that to adopt that Texas Instruments produces, model be the processor of OMAP730; Perhaps, adopting that Samsung produces, model is the processor of S3C2410; Or even the processor of other models.
With the OMAP730 processor is example, and it is built-in usb terminal controller (USB Slaver) 111 and be connected with described usb terminal controller 111 supports to carry out two-way I
2The I of S bus data format conversion
2S bus controller 112.Described I
2 S bus controller 112 has been realized the interface of 8/16 the stereo audio encoding/decoding chip in an outside, supports I
2S bus data form and MSB-justified data layout, and support DMA (high definition stream media broadcast) transmission mode.
And described analogue baseband processors 120 is the chip of UDA1341TS such as the Analog Baseband chip or the model that are TWL3016 ABB for model.The Analog Baseband chip that with the model is TWL3016 ABB is an example, and it is a chip in the GSM/GPRS communication chipset in the communication terminal, and it provides the I of standard
2The S interface, I that can direct and described central processing unit 110
2The S pin connects.In addition, described audio codec 121 also provides the microphone and the speaker interface of standard, and its pin is linked described I respectively
2On 3 GPIO output pins of S bus controller 112; Described audio codec 121 is gone back integrated digital audio frequency and mixer function, and the digitized audio function can be play digitized voice or recorded voice, and frequency mixer is used for volume of controlling various I/O etc.
Communication terminal of the present invention also comprises audio output apparatus 130, and its input end connects the output terminal of described audio codec 121; Described audio output apparatus 130 comprise audio output interface, loudspeaker and earphone at least one of them
Communication terminal of the present invention also comprises audio input device 140, and its output terminal connects the input end of described audio codec 121; Described audio input device 140 comprise audio input interface, microphone and microphone at least one of them.
Thus, the present invention is by multiplexing described usb terminal controller 111, described I
2S bus controller 112 and described audio codec 121 constitute the USB sound card.Voice data on the external unit that is connected with the present invention (such as, computer) receives by described usb terminal controller 111 controls, by described I
2S bus controller 112 transfers the parallel audio data to the serial voice data, and after carrying out D/A conversion through described audio codec 121, exports described audio output apparatus 130 to; Perhaps, outside sound, by described audio input device 140, analog audio data inputs to the input end of described audio codec 121, carries out the A/D conversion through described audio codec 121 then, and by described I
2After S bus controller 112 transfers the serial voice data to the parallel audio data, from described usb terminal controller 111 outputs.
Because USB audio class equipment is a kind of standard device, the USB audio driven that standard is arranged on Windows operating system, so only need the developer to drive design according to the protocol development USB sound card Design of Firmware and the host side Windows of USB audio class, can realize that promptly mobile phone and external unit (such as, computer) carry out the mutual transmission of voice data.
Simultaneously, described I
2S bus controller 112 is for realizing I
2The S bus transfer, described I
2S bus controller 112 provides three kinds of data-transmission modes: normal transmission pattern, DMA transmission mode, transmission pattern.What native system adopted is the transmission pattern, and it has binary channels DMA function, steals bus control right on the one hand, improves the handling capacity of system, on the other hand, can realize receiving simultaneously and sending voice data, i.e. full-duplex mode.
In described central processing unit 110, there are 4 DMA channel controllers to be used to control various external units, wherein the DMA passage of shared two the bridge joint DMA types of I2S and other serial peripherals.By I is set
2S CON register can make described I
2 S bus controller 112 is operated under the DMA pattern.The control of fifo register group is grasped on dma controller under this pattern.When FIFO is full, the data among the FIFO are handled by dma controller.The selection of DMA pattern is by I
2The the 4th and the 5th control of S CON register.
Can carry out simultaneously for the playback and the recording that make the USB sound card, promptly realize full duplex, data transmission is used two DMA passages, and passage 0 is used for playback, and passage 1 is used for recording.During audio data playback, obtain voice data by usb bus earlier, write the DMA buffer zone, steal bus control right, write I by dma controller passage 0
2The S bus also is transferred to described audio codec 121.The passage 1 of dma controller is adopted in recording, and its data flow procedure and playback are opposite.
Because the amount of audio data of handling is bigger, and consider the speed and the I of external device (such as computer) reception/transmission data
2The speed of S bus deal with data can not be mated fully, and this has just caused the phenomenon of flutter or recording frame losing.In order to address this problem, the most simple method is to use bigger annular buffer memory.But in fact big buffer area needs the longer filling time, can occur time-delay in use.In order to solve the problem of time-delay, use annular, multistage caching mechanism.Under this mechanism, buffer area is divided into the piece of several same size, and uses algorithm to realize loop buffer.
Broadcast with 8kHz/16 position/single channel audio stream is the operation of example explanation buffer zone below.The USB synchronous transmission cycle of USB audio class regulation is 1ms, and promptly for the audio stream of 8kHz/16 position/single channel pcm encoder, every 1ms, USB device will be received the data that main frame transmits, and the packet size is 16 bytes, in order to keep I as far as possible
2The transmitting synchronous of S bus and usb bus can be got the size of 16 bytes as a buffer memory section.After the USB sound card received data, described central processing unit 110 judged whether the clear area is arranged in the buffer zone earlier, if there are not enough buffer zones just to skip a sample, and then one by one the data among the FIFO is copied to buffer zone.
Because described I
2The dma controller deal with data of S bus controller 112 is to be undertaken by section, and every segment length is 16 bytes, before dma controller fetches data, judge the data volume in the buffer zone earlier, if there are not enough data (16 byte), then add quiet data, and then carry out the DMA transmission.
To sum up, the present invention has realized based on I by the central processing unit in the multiplexed communications terminal and the partial function of analogue baseband processors
2The USB sound card of S bus makes communication terminal have more the value of multimedia application.
Claims (8)
1, a kind of communication terminal with USB sound card comprises the central processing unit and the analogue baseband processors of interconnection it is characterized in that described central processing unit comprises: usb terminal controller and be connected with described usb terminal controller, support to carry out two-way I
2The I of S bus data format conversion
2The S bus controller; The built-in audio codec that is used for voice data is carried out the encoding and decoding processing of described analogue baseband processors; Multiplexing described usb terminal controller, described I
2S bus controller and described audio codec constitute the USB sound card.
2, the communication terminal with USB sound card according to claim 1 is characterized in that, also comprises audio output apparatus, and its input end connects the output terminal of described audio codec.
3, the communication terminal with USB sound card according to claim 2 is characterized in that, described audio output apparatus comprise audio output interface, loudspeaker and earphone at least one of them.
4, the communication terminal with USB sound card according to claim 1 is characterized in that, also comprises audio input device, and its output terminal connects the input end of described audio codec.
5, the communication terminal with USB sound card according to claim 4 is characterized in that, described audio input device comprise audio input interface, microphone and microphone at least one of them.
6, a kind of method that realizes the USB sound card in communication terminal is characterized in that comprising:
Central processing unit in the multiplexed communications terminal and audio codec, wherein, described central processing unit comprises: USB interface, usb terminal controller and be connected with described usb terminal controller, support to carry out two-way I
2The I of S bus data format conversion
2The S bus controller;
Receive voice data by described usb terminal controller control, by described I
2The S bus controller transfers the parallel audio data to the serial voice data, and carries out D/A conversion back output through described audio codec; Perhaps,, carry out the A/D conversion through described audio codec by the analog audio data of described audio codec input end input, and by described I
2After the S bus controller transfers the serial voice data to the parallel audio data, from described usb terminal controller output.
7, the method that realizes the USB sound card in communication terminal according to claim 6 is characterized in that, the output terminal of described audio codec connects audio output apparatus.
8, the method that realizes the USB sound card in communication terminal according to claim 6 is characterized in that, the input end of described audio codec connects audio input device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101243566A CN101430640B (en) | 2007-11-05 | 2007-11-05 | Communication terminal with USB audio card, and method for implementing USB audio card in communication terminal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101243566A CN101430640B (en) | 2007-11-05 | 2007-11-05 | Communication terminal with USB audio card, and method for implementing USB audio card in communication terminal |
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| CN101430640A true CN101430640A (en) | 2009-05-13 |
| CN101430640B CN101430640B (en) | 2012-01-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354278A (en) * | 2011-06-29 | 2012-02-15 | 中兴通讯股份有限公司 | Method and equipment for processing audio data |
| CN107894883A (en) * | 2017-11-22 | 2018-04-10 | 佛山乐野音乐设备有限公司 | Audio stream transmission method and sound card audio conversion circuit |
| TWI722574B (en) * | 2019-09-18 | 2021-03-21 | 新唐科技股份有限公司 | Audio and data synchronization device and method thereof |
| CN114442992A (en) * | 2022-01-25 | 2022-05-06 | 杭州国芯科技股份有限公司 | Switching method of audio transmission protocol of USB sound card |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110444233A (en) * | 2019-07-02 | 2019-11-12 | 福建新大陆通信科技股份有限公司 | A kind of the audio reception playback method and system of number sound shadow amusement equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1633145A (en) * | 2004-12-30 | 2005-06-29 | 上海贝豪通讯电子有限公司 | A TD-SCDMA handset circuit board realizing efficient integral layout |
| CN1681036A (en) * | 2005-01-07 | 2005-10-12 | 深圳市江波龙电子有限公司 | Movable memory for integrating digital musical play with network telephone communicating software automatic run |
| CN101060570A (en) * | 2007-03-09 | 2007-10-24 | 林明辉 | A method for realizing the plug-in wireless telephone voice communication and storage on the computer |
-
2007
- 2007-11-05 CN CN2007101243566A patent/CN101430640B/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102354278A (en) * | 2011-06-29 | 2012-02-15 | 中兴通讯股份有限公司 | Method and equipment for processing audio data |
| WO2013000213A1 (en) * | 2011-06-29 | 2013-01-03 | 中兴通讯股份有限公司 | Audio data processing method and device |
| CN102354278B (en) * | 2011-06-29 | 2017-09-15 | 中兴通讯股份有限公司 | The processing method and equipment of a kind of voice data |
| CN107894883A (en) * | 2017-11-22 | 2018-04-10 | 佛山乐野音乐设备有限公司 | Audio stream transmission method and sound card audio conversion circuit |
| CN107894883B (en) * | 2017-11-22 | 2023-11-28 | 广州艾美网络科技有限公司 | Audio stream transmission method and sound card audio conversion circuit |
| TWI722574B (en) * | 2019-09-18 | 2021-03-21 | 新唐科技股份有限公司 | Audio and data synchronization device and method thereof |
| CN114442992A (en) * | 2022-01-25 | 2022-05-06 | 杭州国芯科技股份有限公司 | Switching method of audio transmission protocol of USB sound card |
| CN114442992B (en) * | 2022-01-25 | 2024-01-02 | 杭州国芯科技股份有限公司 | Switching method of USB sound card audio transmission protocol |
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| CN101430640B (en) | 2012-01-18 |
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Granted publication date: 20120118 Termination date: 20121105 |