CN1805289A - Audio processing system - Google Patents

Audio processing system Download PDF

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Publication number
CN1805289A
CN1805289A CN 200510135986 CN200510135986A CN1805289A CN 1805289 A CN1805289 A CN 1805289A CN 200510135986 CN200510135986 CN 200510135986 CN 200510135986 A CN200510135986 A CN 200510135986A CN 1805289 A CN1805289 A CN 1805289A
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China
Prior art keywords
audio
unit
audio frequency
data
bus
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CN100525114C (en
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金传恩
房汝明
谢律
张韵东
杨晓东
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Vimicro Corp
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Vimicro Corp
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Abstract

The invention relates to a acoustic processing system, which comprises a control unit, a control bus, a digital signal processing unit, and a digital-analogue conversion unit for receiving the data output by the digital signal processing unit. The invention is characterized in that: the invention also comprises a analogue-digital unit for receiving the analogue acoustic data input by the outside part to output analogue acoustic data to the analogue acoustic bus or process the analogue-digital conversion to output digital acoustic data to the digital signal processing unit; a selecting unit for receiving the data on the analogue acoustic bus to be selected to be output to the outside part; a analogue acoustic bus for receiving the analogue acoustic data of analogue-digital unit and the digital-analogue conversion unit to be transmitted to the selecting unit; the digital signal processing unit receives the digital acoustic data output by the analogue-digital unit to directly or via the digital processing be output to the digital-analogue conversion unit; the digital-analogue conversion unit outputs data to the analogue acoustic bus. The invention can guide in variable acoustic resources to realize variable acoustic processing functions flexibly.

Description

A kind of audio frequency processing system
Technical field
The present invention relates to the multimedia treatment technology, particularly a kind of audio frequency processing system.
Background technology
Often need handle in the multimedia system, in mobile phone terminal system or MP3 player, equally also will often use audio frequency processing system voice data.Described MP3 (MPEG Audio Layer3) is the 3rd layer of audio layer of the defined audio-visual compression standard of dynamic image expert group.
Fig. 1 is an audio frequency processing system structural representation of the prior art, audio frequency processing system 10 shown in Figure 1 mainly comprises: Bus Interface Unit 101, digital signal processing unit 102, D/A conversion unit 103, loudspeaker power amplifier 104, can also comprise: pulse code modulation (PCM, Pulse Code Modulation) audio frequency input unit 105, pcm audio output unit 106.
Bus Interface Unit 101 is connected with external bus 107, receives the control information of outside input, is transmitted to audio frequency processing system 10 each unit by control bus, and Bus Interface Unit 101 also is connected with digital signal processing unit 102, the interactive digital voice data; The running state information that receives audio frequency processing system 10 outputs to the outside.
Usually Bus Interface Unit 101 mainly carries out the conversion of external bus 107 sequential and resolves.Generally all comprise control bus in the audio frequency processing system, each unit is connected transmitting control information in control bus and the audio frequency processing system.
Digital signal processing unit 102 is connected with Bus Interface Unit 101, the interactive digital voice data; Digital signal processing unit 102 also is connected with D/A conversion unit 103, to export to D/A conversion unit 103 through the data after the digital processing, for the audio frequency processing system that comprises pcm audio input unit 105, digital signal processing unit 102 can also receive digital audio-frequency data from pcm audio input unit 105; For the audio frequency processing system that comprises pcm audio output unit 106, digital signal processing unit 102 can also be exported to digital audio-frequency data pcm audio output unit 106.Wherein, described digital processing comprise that audio frequency is comprehensive, audio decoder and audio frequency is synthetic handles.
Digital signal processing unit 102 mainly comprises audio frequency synthesizer 1021, can also comprise: audio frequency synthesizer 1022, audio decoder 1023 and special efficacy audio process 1024.
Audio frequency synthesizer 1021 direct or process audio decoder 1023 or process audio frequency synthesizers 1022, receive the digital audio-frequency data of Bus Interface Unit 101 inputs, can also receive the digital audio-frequency data of pcm audio input unit 105 inputs, synthesize the processing back and directly or after 1024 processing of process special efficacy audio process export to D/A conversion unit 103, can also export to pcm audio output unit 106.
Audio frequency synthesizer 1022 and audio decoder 1023 link to each other with Bus Interface Unit 101, receive encoded digital audio signal.Wherein, audio frequency synthesizer 1022 receives the digital audio-frequency data of Bus Interface Unit 101 outputs, carries out audio frequency and rebuilds, and output to audio frequency synthesizer 1021; Audio decoder 1023 receives the digital audio-frequency data of Bus Interface Unit 101 outputs, carries out decoding work, and outputs to audio frequency synthesizer 1021.
Special efficacy audio process 1024 receives the data of audio frequency synthesizer 1021 outputs, carries out exporting to D/A conversion unit 103 after the special effect processing, can also export to pcm audio output unit 106.Wherein, described special effect processing comprises: 3 D stereo sound effect and/or audio balance adjustment and/or modified tone etc.
The input of D/A conversion unit 103 is connected with digital signal processing unit 102, the data of receiving digital signals processing unit 102 outputs, carry out digital-to-analogue conversion, the output of D/A conversion unit 103 is connected with the input of loudspeaker power amplifier 104, the output of D/A conversion unit 103 also is directly connected to the audio frequency processing system outside, analog audio data can be exported to loudspeaker power amplifier 104 after the digital-to-analogue conversion, also can output to the audio frequency processing system outside.
The input of loudspeaker power amplifier 104 is connected with the output of D/A conversion unit 103, also is connected with audio process is outside, and the output of loudspeaker power amplifier 104 is connected to the audio frequency processing system outside.Loudspeaker power amplifier 104 receives the analog audio data of D/A conversion unit 103 outputs, can also receive the analog audio data of the outside input of audio process, wherein, if input is two paths of data, then simulate the devices such as loudspeaker of exporting to the audio frequency processing system outside after synthetic and the power amplification, if input is a circuit-switched data, then directly carry out exporting to after the power amplification devices such as loudspeaker of audio frequency processing system outside.
Pcm audio input unit 105 receives from the pcm audio data of the outside input of audio frequency processing system, sends to digital signal processing unit 102.
The digital audio-frequency data of pcm audio output unit 106 receiving digital signals processing units 102 outputs outputs to the audio frequency processing system outside.
Fig. 2 is the application schematic diagram of audio frequency processing system 10 in the mobile phone terminal system shown in Figure 1, and system shown in Figure 2 comprises: Mike (MIC) unit 201, baseband chip 202, audio frequency processing system 203, listen to unit 204, radio frequency (RF) module 206.System shown in Figure 2 can also comprise: audio-frequency assembly 205.
MIC unit 201 sends simulation and send speech to baseband chip 202.
The described herein speech that send is this cellphone subscriber's a speech.The base band side is that the speech that send that baseband chip 202 receives is that speech is sent in simulation among Fig. 2.
MIC unit 201 comprises mobile phone MIC2011 and headset MIC2012.
Baseband chip 202 comprises usually: base band speech analog to digital converter 2021, base band CPU element 2022, base band speech digital to analog converter 2023, baseband processor 2024, base band RF interface module 2025 etc.Described baseband processor 2024 can be central processing unit (CPU) or digital signal processor (DSP).
Base band speech analog to digital converter 2021 receives the simulation of MIC unit 201 transmissions and send voice data, convert to and send to baseband processor 2024 by base band bus 2026 behind the digital audio-frequency data and handle, and be sent to baseband chip 202 external RF modules 206 by base band RF interface module 2025 and launch.
Base band speech digital to analog converter 2023 receives numerals by base band bus 2026 from baseband processor 2024 and is subjected to voice data, sends to the loudspeaker power amplifier 2034 of listening to unit 204 and/or audio frequency processing system 203 after being converted to analog audio data.
The described herein speech that is subjected to is the other side cellphone subscriber's a speech, normally receive and be subjected to speech by the RF module 206 of the base band RF interface module 2025 in the baseband chip 202 in this mobile phone terminal system by baseband chip 202 outsides, and, output to baseband chip 202 outsides by base band speech digital to analog converter 2023 again via sending to base band speech digital to analog converter 2023 after baseband processor 2024 processing.
Base band CPU element 2022 is by each unit interactive information in base band control bus and the base band; Base band CPU also is connected with Bus Interface Unit 2031 in the audio frequency processing system 203, mutual control information and voice data etc.Each unit is connected transmitting control information in described base band control bus and the baseband chip.
Base band CPU element 2022 is the main control unit of base band, and the most of professional control of mobile phone terminal system is to be undertaken by base band CPU.
Baseband chip 202 is that numeral is subjected to speech by the speech that is subjected to that base band RF interface module 2025 receives among Fig. 2, baseband chip 202 also receives simulation and send and be converted to numeral behind the speech and send speech, need to prove, do not comprise numeral in the mutual digital audio-frequency data of baseband chip 202 and Bus Interface Unit 2031 and send speech and numeral to be subjected to speech.
Baseband processor 2024 is connected on the base band bus 2026, with each unit interaction data in the baseband chip 202.
Base band RF interface module 2025 receives and is subjected to speech, sends to baseband processor 2024 by base band bus 2026; Base band RF interface module 2025 is launched by the speech that send of base band bus 2026 reception baseband processor 2024 transmissions.
Base band RF interface module 2025 is connected with the RF module 206 of baseband chip 202 outsides usually, receives the data that RF module 206 sends, and sends data to RF module 206.
The unit that audio frequency processing system 203 comprises is identical with audio frequency processing system 10 among Fig. 1, wherein:
Bus Interface Unit 2031 is by base band CPU element 2022 mutual control information and the digital audio-frequency datas in bus 206 and the baseband chip 202;
From the digital audio-frequency data of Bus Interface Unit 2031 inputs, be converted to analog audio data by D/A conversion unit 2033 through after the digital processing of digital signal processing unit 2032;
The data of D/A conversion unit 2033 outputs can be exported to the headphone unit of listening in the unit 204 2042, also can carry out sending to the loudspeaker of listening in the unit 204 after the power amplification through loudspeaker power amplifier 2034;
Loudspeaker power amplifier 2034 receives the analog audio data data that D/A conversion unit 2033 sends, carry out sending to the loudspeaker of listening in the unit 204 after the power amplification, loudspeaker power amplifier 2034 can also receive the simulation that base band speech digital to analog converter 2023 sends in the baseband chip 202 and be subjected to speech, carry out sending to the loudspeaker of listening in the unit 204 after the power amplification, when loudspeaker power amplifier 2034 received simulation that analog audio data that D/A conversion unit 2033 sends and base band speech digital to analog converter 2023 send simultaneously and is subjected to speech, loudspeaker power amplifier 2034 sent to the loudspeaker of listening in the unit 204 after can simulating synthetic and power amplification again.
Listening to unit 204 comprises: loudspeaker 2041 and headphone unit 2042 also can comprise earpiece unit 2043 usually.
Be driven after the analog audio data of loudspeaker power amplifier 2034 outputs in the loudspeaker 2041 reception audio frequency processing systems 203.
Headphone unit 2042 comprises: gate 20421, earphone power amplifier 20422 and headset earphone 20423; The simulation of base band speech digital to analog converter 2023 outputs is subjected to the analog audio data of speech and audio frequency processing system 203 outputs in the gate 20421 reception baseband chips 202, carries out exporting to earphone power amplifier 20422 behind the gating; Earphone power amplifier 20422 receives the analog audio data that gate 20421 sends, and carries out sending to headset earphone 20423 after the power amplification; Be driven after the analog audio data that headset earphone 20423 reception earphone power amplifiers 20422 send.
Earpiece unit 2043 comprises: receiver power amplifier 20431 and receiver 20432; The simulation that receiver power amplifier 20431 receives base band speech digital to analog converter 2023 outputs in the baseband chip 202 is subjected to speech, carries out sending to receiver 20432 after the power amplification; Be driven after the analog audio data that receiver 20432 reception receiver power amplifiers 20431 send.
Directly realize handset function with loudspeaker 2041 in some mobile phone terminal system, at this moment, the earpiece unit 2043 among Fig. 2 can be omitted.
RF module 206 is connected with baseband chip 202 by base band RF interface module 2025, receive to be subjected to send to base band RF interface module 2025 behind the speech, 2025 transmissions of reception base band RF interface module send speech after launch.
Audio-frequency assembly 205 is generally audio decoder, and the digital audio-frequency data of audio-frequency assembly 205 outputs enters the pcm audio input unit 2035 in the audio frequency processing system 203.
In the system shown in Figure 2, the simulation of baseband chip 202 output is subjected to speech to enter loudspeaker power amplifier 2034 in the audio frequency processing system 203, can simulate with the analog audio data of D/A conversion unit 2033 output and export to loudspeaker after synthetic, the simulation of baseband chip 202 outputs is subjected to speech can also directly export to headphone unit 2042 and earpiece unit 2043.In system shown in Figure 2, send speech to enter baseband chip 202 by the simulation of MIC unit 201 inputs, and after baseband chip 202 is handled, directly launch.
The shortcoming of audio frequency processing system of the prior art is: the processing capacity to audio frequency is more single.
1) analog audio data of input audio frequency processing system is more single.Have only simulation to be subjected to speech input audio frequency processing system 203 such as Fig. 2, and simulation send speech not enter audio frequency processing system 203, therefore 203 pairs of simulations of audio frequency processing system send speech can not carry out any processing, even simulation is subjected in the speech, also is to carry out any processing to the speech that is subjected to that enters receiver 2041.
2) enter into the digital signal processing unit of audio frequency processing system without any analog audio data.In Fig. 2, simulation send speech and simulation to be subjected to speech all not enter into the digital signal processing unit 2032 of audio frequency processing system 203, though simulation wherein is subjected to speech to enter audio frequency processing system 203, but also just enter into loudspeaker power amplifier 2034, simply simulate synthetic the processing.Therefore the digital signal processing unit 2032 among Fig. 2 can only carry out digital processing to the digital audio-frequency data that enters audio frequency processing system 203.
3) it is more single to be input to the digital audio-frequency data of audio frequency processing system, can only receive the digital audio-frequency data by Bus Interface Unit or the input of pcm audio input unit.
We can say that audio frequency processing system function ratio of the prior art is more single.Along with Development of Multimedia Technology, people more and more need to possess the appearance of the audio frequency processing system of multiple function, to satisfy the individual demand that people increase day by day, satisfy multiple Audio Processing needs.Wish can add background music in the speech to embody personalized glamour sending of oneself such as the cellphone subscriber, this just needs a kind of appearance that can realize multi-purpose audio process.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of audio frequency processing system, can introduce multiple audio-source, realizes multiple Audio Processing function flexibly.
Technical scheme of the present invention is achieved in that
A kind of audio frequency processing system, comprise: receive outside input control information and be transmitted to the control unit of each unit of audio frequency processing system, be connected with each unit of audio frequency processing system and the control bus of transmitting control information, dateout are given the digital signal processing unit of D/A conversion unit, the D/A conversion unit of receiving digital signals processing unit dateout by control bus, this system further comprises:
Modulo unit receives outside at least one road analog audio data of importing, and the outputting digital audio data were given digital signal processing unit after the output analog audio data was given the analogue audio frequency bus or carried out analog-to-digital conversion;
Gating unit receives the data on the analogue audio frequency bus, carries out exporting at least one circuit-switched data to outside behind the gating;
The analogue audio frequency bus, the analog audio data of reception modulo unit, D/A conversion unit output is transmitted to gating unit;
Digital signal processing unit further receives the digital audio-frequency data of modulo unit output, directly or carry out exporting to D/A conversion unit after the digital processing;
The data that D/A conversion unit further will carry out after the digital-to-analogue conversion are exported to the analogue audio frequency bus.
Described modulo unit comprises: at least one analog to digital converter.
Described modulo unit further comprises: at least one gate;
Each gate receives at least one road analog audio data of outside input, carries out exporting a circuit-switched data to an analog to digital converter or analogue audio frequency bus behind the gating.
Described digital signal processing unit comprises: the audio frequency synthesizer;
The audio frequency synthesizer receives the data of modulo unit output, directly or carry out audio frequency and export to D/A conversion unit after synthetic.
Described gating unit comprises: at least one gate;
Each gate receives the data of analogue audio frequency bus output, carries out exporting a circuit-switched data to outside behind the gating.
Described control unit is: Bus Interface Unit;
Bus Interface Unit receives the outside control information of importing is transmitted to each unit of audio frequency processing system by control bus control unit.
This system further comprises: CPU element;
CPU element receives the control information that Bus Interface Unit is transmitted, and resolves the back and produces schedule information, by control bus schedule information is sent to each unit of audio frequency processing system.
Described control unit is: CPU element;
CPU element receives the control information of outside input, resolves the back and produces schedule information, by control bus schedule information is sent to each unit of audio frequency processing system.
This system further comprises: the audio frequency processing system bus;
Digital signal processing unit receives the data on the audio frequency processing system bus, and sends data to the audio frequency processing system bus.
This system further comprises: storage control and/or general-purpose serial bus USB controller;
Storage control is connected with the audio frequency processing system bus, and is connected with the outside, in order to the data interaction between control exterior storage medium and the audio frequency processing system;
The USB controller is connected with the audio frequency processing system bus, and is connected with the outside, in order to realize communicating by letter between external USB equipment and the audio frequency processing system.
Described control unit is: Bus Interface Unit;
Bus Interface Unit receives the voice data of outside input, is transmitted to the audio frequency processing system bus; Data forwarding on the audio frequency processing system bus is given outside.
This system further comprises: CPU element:
CPU element receives the data on the audio frequency processing system bus, carries out exporting to the audio frequency processing system bus after data parsing and the processing.
Described control unit is: CPU element;
CPU element receives the data on the audio frequency processing system bus, carries out exporting to the audio frequency processing system bus after data parsing and the processing.
Described digital signal processing unit comprises: the audio frequency synthesizer;
The audio frequency synthesizer receives the data on the audio frequency processing system bus, and sends data to the audio frequency processing system bus.
Described digital signal processing unit comprises: audio frequency synthesizer and/or audio decoder;
The audio frequency synthesizer receives the data on the audio frequency processing system bus, carries out exporting to the audio frequency synthesizer after audio frequency is rebuild;
Audio decoder receives the data on the audio frequency processing system bus, carries out exporting to the audio frequency synthesizer behind the audio decoder.
Described digital signal processing unit comprises: special efficacy audio process or audio coder;
The special efficacy audio process receives the data of audio frequency synthesizer output, directly or carry out exporting to D/A conversion unit and/or audio frequency processing system bus after special school handles;
Audio coder receives the data of audio frequency synthesizer output, carries out exporting to the audio frequency processing system bus behind the audio coding;
Or: special efficacy audio process and audio coder;
The special efficacy audio process receives the data of audio frequency synthesizer output, directly or carry out exporting to D/A conversion unit and/or audio coder after special school handles;
Audio coder receives the data of special efficacy audio process output, carries out exporting to the audio frequency processing system bus behind the audio coding.
This system further comprises: the special efficacy audio process;
The special efficacy audio process receives the data of audio frequency synthesizer output, directly or carry out exporting to D/A conversion unit after special school handles.
This system further comprises: power amplification unit;
Power amplification unit receives the data of gating unit output, carries out outputing to the outside after the power amplification.
Described power amplification unit comprises: at least one power amplifier.
This system further comprises: pcm audio input unit and/or pcm audio output unit;
The pcm audio input unit receives the pcm audio data of outside input, is transmitted to digital signal processing unit;
Output to the outside after the pcm audio data of pcm audio output unit receiving digital signals processing unit output;
Correspondingly, digital signal processing unit further comprises: the pcm audio data and/or the output pcm audio data that receive the input of pcm audio input unit are given the pcm audio output unit.
Among the present invention.The present invention has following beneficial effect:
1, the audio frequency processing system among the present invention, because the introducing of Bus Interface Unit, storage control, pcm audio input interface and analog to digital converter can be supported the input of different audio-source, such as:
1) can import multiple digitized audio stream by Bus Interface Unit, as: fan's flute (MIDI) code stream, adaptive audio pulse code (ADPCM) code stream, MP3 and adaptive multi-rate (AMR) code stream etc.;
2) can import multiple digitized audio stream by storage control, as: MIDI code stream, adpcm code stream, MP3 code stream and AMR code stream etc.;
3) can import multiple simulated audio frequency amount by analog to digital converter, as: microphone input and line are gone into input etc.;
4) by the pcm audio input interface, the digital audio-frequency data that other audio frequency processing systems are exported can be imported;
5) by above 1)～4) in the introducing of 4 types of unit, this device is supported the independent input or the parallel input of polytype source of sound simultaneously, on the audio types can be: multiple digitized audio stream such as MIDI, ADPCM, MP3, AMR, on the source of input can be: MIC input, line be gone into the digital audio-frequency data of input, other its outputs of Audio Processing etc.
2, the audio frequency processing system among the present invention can carry out multiple Audio Processing, such as:
1) can introduce different audio decoders easily, as: adpcm decoder, MP3 decoding device and AMR decoder etc.;
2) can introduce different audio coders easily, as: adpcm encoder, MP3 encoder and AMR encoder etc.;
3) can introduce different audio frequency synthesizers easily, as: the MIDI synthesizer;
4) audio frequency of different input channels can be synthesized, and should synthetic can selectively carry out by configuration;
5) can carry out special effect processing to the digital audio data after synthetic, as: 3-D audio is handled, audio balance processing and modified tone etc.
6) by storage control, can realize storage to digital audio data;
7) by Bus Interface Unit, support is by the voice data after the external bus access process or import pending voice data;
8) support the concurrent working of functions such as audio frequency input, synthetic, processing, playback and storage, thereby can support various different systems application, as the functions such as calling record in the mobile phone terminal system.
3, the audio frequency processing system among the present invention is supported the multiple audio frequency way of output, such as:
1) can export the digitized audio of PCM form by the pcm audio output unit;
2) can export the digitized audio of PCM form or compressed coding by Bus Interface Unit;
3) can export the digitized audio of PCM form or compressed coding by storage control;
4) can export simulated audio signal by analog to digital converter and power amplifier.
4, the present invention has introduced the structure of gate cascade analog to digital converter, its advantage is: because the introducing of multi-channel gating device, a plurality of audio-source are linked to each other with same analog to digital converter by this multi-channel gating device, thereby realize the same modulo unit of multiple input sources time-sharing multiplex; Because different audio-source is operated in different patterns usually in system applies, promptly be not that all audio-source are worked simultaneously under a certain pattern, therefore the audio-source that is operated in different mode can be carried out time-sharing multiplex by this multi-channel gating device, reduce the requirement of system thus, thereby reduce system cost analog to digital converter quantity.
5, after input and output have been introduced multi-channel gating device, can easily different analogue audio frequency inputs be mapped to output by configuration, thereby make system configuration flexible, the user can be according to the demand custom-built system of oneself.
6, introduced the simulation bypass structure among the present invention, its advantage is: digital signal processing units such as analog to digital converter and audio frequency be synthetic under some pattern are by bypass, and are placed in park mode, thereby greatly reduce system power dissipation.
7, based on existing baseband chip, utilize the audio frequency processing system among the present invention again, the mobile phone terminal system not only can realize the function that existing mobile phone can be realized usually, can also realize multiple new function, such as: send to add voice reproducing, the Kara OK function of band recording, mobile USB flash disk, PC USB (USB) wireless networking capabilities etc. on the speech.
8, utilize audio frequency processing system among the present invention after, the baseband processor that do not need to upgrade at once also can realize multiple function, and baseband chip accounts for a big chunk of mobile phone terminal system cost, therefore utilizes the present invention can save cost.
Description of drawings
Fig. 1 is a prior art sound intermediate frequency treatment system schematic diagram;
Fig. 2 is the application schematic diagram of prior art sound intermediate frequency treatment system in the mobile phone terminal system;
Fig. 3 is an embodiment of the invention sound intermediate frequency treatment system schematic diagram;
Fig. 4 is the application schematic diagram of embodiment of the invention sound intermediate frequency treatment system in the mobile phone terminal system;
Fig. 5 is the application schematic diagram of embodiment of the invention sound intermediate frequency treatment system in the MP3 player.
Embodiment
Following with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in more detail.
Fig. 3 is a present embodiment sound intermediate frequency treatment system structural representation, audio frequency processing system 30 shown in Figure 3 mainly comprises: control unit 301a, modulo unit 302, digital signal processing unit 303, D/A conversion unit 304, gating unit 305 can also comprise: USB controller 307, storage control 308, pcm audio input unit 309, pcm audio output unit 310, power amplification unit 311.
Control unit 301a receives the outside control information of importing by bus 314, passes to each unit of audio frequency processing system by control bus.The running state information that control unit 301a receives audio frequency processing system 30 outputs to the outside.
Control bus is connected transmitting control information with audio frequency processing system 30 each unit.
Control unit 301a can be CPU element 301, and CPU element 301 receives the control information of outside input by bus 314, is transmitted to each unit of audio frequency processing system by control bus; When control unit 301a was CPU element 301, audio frequency processing system 30 can comprise, and also can not comprise Bus Interface Unit 306.
Control unit 301a also can be Bus Interface Unit 306, and Bus Interface Unit 306 receives the control information of outside input by bus 314, is transmitted to each unit of audio frequency processing system by control bus; When control unit 301a is Bus Interface Unit 306, audio frequency processing system 30 can comprise, also can not comprise CPU element, when comprising CPU element, CPU element is by Bus Interface Unit and the mutual control information of ppu, be specially: CPU element 301 is connected by the outer processor of Bus Interface Unit 306 and sheet, carries out information exchange and to the sheet parsing of processor command outward.
In the audio frequency processing system 30 shown in Figure 3, CPU element 301 can also be connected with Bus Interface Unit 306, digital signal processing unit 303 by audio frequency processing system bus 312, can also be connected with USB controller 307, storage control 308, the different mode of operation that the CPU element basis is provided with is in advance finished the configuration to each unit, and handles accordingly.CPU element can also be carried out data processing, be specially: receive the data on the audio frequency processing system bus 312, be put into after resolving on the audio frequency processing system bus, such as: analyze the file comprise multiple audio format, parse behind the MIDI audio stream wherein and to send to digital signal processing unit 303 by audio frequency processing system bus 312 and synthesize etc.
CPU element 301 can be configured and dispatch by the work to audio frequency processing system 30 each unit, reduces the work load of ppu.
In the audio frequency processing system 30 shown in Figure 3, Bus Interface Unit 306 can also be connected with audio frequency processing system bus 312.By Bus Interface Unit 306, the CPU element 301 of audio frequency processing system, digital signal processing unit 303 can with the ppu swap data.By Bus Interface Unit 306, the storage control 308 of audio frequency processing system, USB controller 307 also can with the ppu swap data.
By Bus Interface Unit 306, support by voice data or the outside pending voice data of input after 303 processing of external bus 314 visit digital signal processing units.Can import outside multiple digitized audio stream by Bus Interface Unit 306, as: MIDI, ADPCM, MP3 and AMR etc.; Can export the digitized audio of PCM form or compressed coding by Bus Interface Unit 306.
Modulo unit 302 receives from the simulated audio signal of the outside input of audio frequency processing system, sends to digital signal processing unit 303 after being converted to digital audio and video signals; Modulo unit 302 receives also can be without analog-to-digital conversion behind the simulated audio signal of the outside input of audio frequency processing systems but directly export simulated audio signal, and sends to gating unit 305 by analogue audio frequency bus 313.
Input according to different needs D/A conversion units 304 can be one or more in the present embodiment, and output also can be one or more.
Modulo unit 302 comprises k analog to digital converter, and promptly analog to digital converter a1～ak can also comprise no more than k gate, and such as gate a1～ak, k is a positive integer.In the modulo unit 302, each gate receives from the multi-channel analog voice data of the outside input of audio frequency processing system, carries out sending to an analog to digital converter behind the gating; Each analog to digital converter directly or from gate receives from one road simulated audio signal of the outside input of audio frequency processing system, exports to digital signal processing unit 303 after being converted to digital audio and video signals.Described gate is used for selecting a road of multichannel input to export as it, promptly realizes the mapping of multichannel to one tunnel.Its mapping relations are configurable, and gate also can be called multi-channel gating device.Sampling and numeral that described analog to digital converter is finished the analogue audio frequency input transform, and it is input as the input of one road analogue audio frequency, and it is output as the output of one road digitized audio.During practical application, in the modulo unit 302, can be the output of a gate of input connection of each analog to digital converter, also can be that the input of some analog to digital converter does not connect gate and directly receives the outside analog audio data of importing.
The structure that in the present embodiment gate is linked to each other with analog to digital converter is called the structure of gate cascade analog to digital converter, in the structure of this gate cascade analog to digital converter, introducing by multi-channel gating device, a plurality of audio-source are linked to each other with same analog to digital converter by this multi-channel gating device, thereby realize the same modulo unit 302 of multiple input sources time-sharing multiplex.Because different audio-source is operated in different patterns usually in system applies, promptly be not that all audio-source are worked simultaneously under a certain pattern, so this type of audio-source can be carried out time-sharing multiplex by this multi-channel gating device.
Can introduce the module of one or more sets these type of multi-channel gating device cascade analog to digital converters in the present embodiment.
The modulo unit 302 of gate cascade analog-digital converter structure also can be exported simulated audio signal in the present embodiment, and sends to gating unit 305 by analogue audio frequency bus 313.Specifically: in this cascade unit, can directly output on the analogue audio frequency bus 313 from the analog audio data of the outside input of audio frequency processing system, or from the analog audio data of the outside input of audio frequency processing system by behind the gate gating without analog to digital converter, directly simulated audio signal is outputed on the analogue audio frequency bus 313.
In the present embodiment with analog signal without analog-to-digital conversion process promptly without analog to digital converter, directly the structure of output is called the simulation bypass structure.Usually, the final purpose of simulation bypass structure be will input analog audio data without digital processing, directly transmit, such as the input that is delivered to power amplification unit 311 etc.After the simulation bypass structure had been arranged, system shown in Figure 3 not only possessed the digitized processing function to the analog audio data of input, also can provide straight-through function simultaneously.The simulation bypass structure is to consider under some pattern, analog signal does not need intermediate treatment, only need directly output, in Fig. 3, the simulated audio signal of the simulated audio signal of exporting behind the multi-channel gating device gating and D/A conversion unit 304 outputs constitutes an analogue audio frequency bus 313, and the analog audio data on the analogue audio frequency bus 313 can pass to power amplification unit 311 after by gating unit 305 gatings.
After introducing the simulation bypass structure, digital signal processing unit 303 such as analog to digital converter and audio frequency be synthetic under some pattern will be by bypass, and can be placed in park mode; Owing to introduced multi-channel gating device in this structure, can flexibly and easily different analogue audio frequency inputs be mapped to output by configuration, concrete system user can be according to the demand customization of oneself.
Can import multiple simulated audio frequency amount by modulo unit 302, as: microphone input and line are gone into input etc., and described line goes into to be input as the simulation output of other audio frequency apparatuses.
Digital signal processing unit 303 receives digital audio-frequency data, carries out exporting after the digital processing; The input of digital signal processing unit 303 is connected with the output of D/A conversion unit 304, the output of pcm audio input unit 309, receives digital audio-frequency data; The output of digital signal processing unit 303 is connected the outputting digital audio data with the input of D/A conversion unit 304, the input of pcm audio output unit 310; Digital signal processing unit 303 is connected with CPU element 301, Bus Interface Unit 306, USB controller 307, storage control 308 by audio frequency processing system bus 312, the interactive digital voice data, such as: digital signal processing unit 303 can receive the audio stream that CPU element 301 is resolved back output.Digital signal processing unit 303 can receive data by audio frequency processing system bus 312, also can dateout.
Digital signal processing unit 303 comprises audio frequency synthesizer 3031 at least, can also comprise: one or more in audio frequency synthesizer 3032, audio decoder 3033, audio coder 3034, the special efficacy audio process 3035 etc.
Audio frequency synthesizer 3031 receives the data of modulo unit 302 outputs, audio frequency synthesizer 3031 can also receive the data of pcm audio input unit 309 inputs, can also receive the data of audio frequency synthesizer 3032 and/or audio decoder 3033 outputs, and can directly receive the PCM data on the audio frequency processing system bus 312, directly or through special efficacy audio process 3035 send to D/A conversion unit 304 through the synthetic back of data, data after process audio frequency synthesizer 3031 synthesizes can also directly or behind the process special efficacy audio process 3035 send to audio coder 3034, output to audio frequency processing system bus 312 by audio coder 3034, can certainly directly output to audio frequency processing system bus 312, this dateout can store exterior storage medium into via storage control 308 also can be delivered to external bus 314 via Bus Interface Unit 306.When the data of audio frequency synthesizer 3031 inputs were a circuit-switched data, audio frequency synthesizer 3031 can be operated in direct mode operation, and when audio frequency synthesizer 3031 was operated in direct mode operation, audio frequency synthesizer 3031 did not synthesize directly output of processing to the voice data of input.
Audio frequency synthesizer 3031 can support that according to different configurations a plurality of passages are the input of multi-path digital audio stream, also can support the output of a plurality of passage digitized audios.Wherein, each output channel is all supported direct mode operation, and its input channel is configurable, promptly any input channel directly can be outputed to a certain output channel; The synthetic input channel of each output channel also is configurable, promptly can selection portion divide or all input channel synthesized.Described audio frequency synthesizer 3031 carries out processing such as addition and/or filtering usually.
The data that audio frequency synthesizer 3032 receives on the audio frequency processing system bus 312 are rebuild voice data, send to audio frequency synthesizer 3031 again.
Described audio frequency synthesizer 3032 is according to music score, realizes the reconstruction of audio frequency by modes such as specific method such as frequency modulation(FM) (FM) or wave table are synthetic, and is synthetic or wave table MIDI is synthetic as FM MIDI.At this device sound intermediate frequency synthesizer 3032 can be one or more, one or more such as in FM MIDI synthesizer, the wave table MIDI synthesizer etc.
The data that audio decoder 3033 receives on the audio frequency processing system bus 312 send to audio frequency synthesizer 3031 after decoding.
Specifically, audio decoder 3033 is finished the decoding work of various audio code streams.Audio decoder 3033 can be one or more in the present embodiment, one or more such as in the decoders such as ADPCM, MP3, AMR and AAC.
Audio coder 3034 receives audio frequency synthesizers 3031 directly or through the data that special efficacy audio process 3035 backs send, and compresses and the back of encode sends to by audio frequency processing system bus 312 and stores up the controller store storage and also can send to Bus Interface Unit 306 to exterior storage medium and be delivered to external bus 314.
Specifically: audio coder 3034 compresses the digital audio of encoder format acceptables such as PCM form and encodes.Present embodiment sound intermediate frequency decoder 3033 can be one or more, such as: one or more in adpcm encoder, AMR encoder, the MP3 encoder etc.
Special efficacy audio process 3035 receives the data that audio frequency synthesizer 3031 sends, send to D/A conversion unit 304 after the special effect processing in addition, can also send to audio coder 3034, the data of special efficacy audio process 3035 outputs also can send to pcm audio output unit 310.When the data of audio frequency synthesizer 3031 outputs did not need to carry out special effect processing, special efficacy audio process 3035 can be operated in direct mode operation, and when being operated in direct mode operation, the data of 3035 pairs of inputs of special efficacy audio process are not carried out any special effect processing and directly exported.
Described special effect processing can be 3 D stereo sound effect, audio balance adjustment, modified tone etc.Special efficacy audio process 3035 can be selected to keep or remove according to system's needs.
The digital audio-frequency data of D/A conversion unit 304 receiving digital signals processing units 303 output sends to gating unit 305 by analogue audio frequency bus 313 after being converted to analog audio data.
Described D/A conversion unit 304 is finished the conversion of digitized audio to analogue audio frequency, it is input as one or more digitized audio input, be output as one or more analogue audio frequency output, the typical case is applied as: the input of dual track digital audio promptly is respectively: L channel and R channel; The output of triple-track analogue audio frequency promptly is respectively: the stack of L channel, R channel, L channel and R channel.
Gating unit 305 receives the analog audio data of D/A conversion unit 304 outputs by analogue audio frequency bus 313, can also receive from the outside directly input of audio frequency processing system or by the analog audio data behind the gate gating the gate cascade modulo unit 302 by analogue audio frequency bus 313, carry out directly or through behind the power amplification unit 311 outputing to the audio frequency processing system outside behind the gating.
Gating unit 305 comprises n gate, be gate 1～gate n, n is a positive integer, each gate receives the analog audio data of D/A conversion unit 304 outputs by analogue audio frequency bus 313, also can receive from the outside directly input of audio frequency processing system or by the analog audio data behind the gate gating the gate cascade modulo unit 302, carry out behind the gating direct or by outputing to the audio frequency processing system outside behind the power amplification unit 311 by analogue audio frequency bus 313.
USB controller 307 connects audio frequency processing system and external equipment, in order to swap data.
Specifically, USB controller 307 is connected with Bus Interface Unit 306, CPU element 301, storage control 308 by audio frequency processing system bus 312, and swap data is in order to communicating by letter between realization external USB equipment and the audio frequency processing system.Described external USB equipment can be console controller.
Described USB controller 307 is USB device controller unit, and described external equipment can be a PC.Such as, audio frequency processing system can realization and outer PC by USB controller 307, CPU element 301, Bus Interface Unit 306 and comprise in the mobile phone terminal system of audio frequency processing system 30 between the baseband chip exchanges data.
Storage control 308 connects audio frequency processing system and outside storage medium, in order to swap data.
Specifically, storage control 308 is connected swap data by audio frequency processing system bus 312 with digital signal processing unit 303, Bus Interface Unit 306, CPU element 301, USB controller 307.
Described exterior storage medium can be storage chip or External memory equipment.
By storage control 308, the voice data that audio frequency processing system can be handled stores in the exterior storage medium, promptly realizes the storage to digital audio data; Also the data of storing in the exterior storage medium can be input in the audio frequency processing system and be handled and playback, can import multiple digitized audio stream by storage control 308, as: MIDI code stream, adpcm code stream, MP3 code stream and AMR code stream etc.; Can export the digitized audio of PCM form or compressed coding.
By USB controller 307 and storage control 308, utilize storage medium again, can constitute a movable storage device, such as mobile USB flash disk, thereby realize carrying out exchanges data with outer PC.
Pcm audio input unit 309 receives from the pcm audio data of the outside input of audio frequency processing system, sends to digital signal processing unit 303.
By the pcm audio input interface, the digital audio-frequency data of outside other audio process outputs can be input in this audio frequency processing system.
The digital audio-frequency data of pcm audio output unit 310 receiving digital signals processing units 303 outputs outputs to the audio frequency processing system outside.
Can export the digitized audio of PCM form by pcm audio output unit 310.
Power amplification unit 311 receives the analog audio data of gating unit 305 outputs, carries out outputing to the audio frequency processing system outside after the power amplification.
Power amplification unit 311 comprises no more than n power amplifier, such as: power amplifier 1～power amplifier n, a power amplifier receives the dateout of a gate, carries out exporting after the power amplification.Certainly analogue audio frequency output also can directly output to the outside without power amplifier.
Described power amplifier is used for the prime simulated audio signal is carried out power amplification, thereby drives sound chamber or earphone constant power element.As required one or more power amplifier of different choice in the present embodiment.The typical case of power amplifier uses and comprises: the dual-channel audio amplifier that is used to drive earphone; Be used to drive the monophony or the dual-channel audio amplifier of loudspeaker; Be used to single channel amplifier that drives by analog to digital converter etc.
Fig. 4 is the application schematic diagram of audio frequency processing system 30 in the mobile phone terminal system shown in Figure 3.The part relevant with audio frequency processing system 403 in the mobile phone terminal system of only drawing among Fig. 4, the mobile phone terminal system among Fig. 4 comprises: MIC unit 401, baseband chip 402, audio frequency processing system 403, listen to unit 404, RF module 408.System shown in Figure 4 can also comprise: audio-frequency assembly 406, storage medium 405, FM module 407.
MIC unit 401 sends simulation and send speech to audio frequency processing system 403.
MIC unit 401 comprises mobile phone MIC4011 and headset MIC4012.Described mobile phone MIC4011 is the embedded MIC of mobile phone, uses during common making a phone call; Described headset MIC4012 is the MIC that is embedded in the headset, uses during the headset conversation.
Baseband chip 402 is identical with baseband chip 402 among Fig. 2, comprises usually: base band speech analog to digital converter 4021, base band CPU element 4022, base band speech digital to analog converter 4023, baseband processor 4024, base band RF interface module 4025 etc.
Wherein, base band speech analog to digital converter 4021 receives the analog audio data that audio frequency processing system 403 sends, convert to and send to baseband processor 4024 behind the digital audio-frequency data and handle, and launch by the RF module 408 that base band RF interface module 4025 is transferred to baseband chip 402 outsides.
Base band speech digital to analog converter 4023 receives numerals by base band bus 4026 from baseband processor 4024 and is subjected to voice data, sends to audio frequency processing system 403 after being converted to analog audio data;
Base band CPU element 4022 is connected with Bus Interface Unit 4036 in the audio frequency processing system 403 by bus 408, carries out data interaction, and mutual data comprise control information and some digital audio-frequency datas.
Described base band CPU element 4022 is the embedded type CPU of base band in the mobile phone terminal system, is also referred to as base band MCU, is generally master cpu in the mobile phone terminal system.The digital audio-frequency data that base band CPU sends to Bus Interface Unit 4036 can be MIDI or ADPCM or multiple digitized audio stream such as MP3 or AMR.The digital audio-frequency data that Bus Interface Unit 4036 sends to base band CPU element 4022 can be the digitized audio of PCM form or process compressed encoding.
Audio frequency processing system 403 among Fig. 4 comprises at least: Bus Interface Unit 4036, D/A conversion unit 4034, digital signal processing unit 4033, D/A conversion unit 4034, gating unit 4035, power amplification unit 40311, the audio frequency processing system 403 among Fig. 4 can also comprise: CPU element 4031, USB controller 4037, storage control 4038, pcm audio input unit 4039 and pcm audio output unit 40310.
Each Elementary Function that Fig. 4 sound intermediate frequency treatment system 403 comprises is identical with each Elementary Function that Fig. 3 sound intermediate frequency treatment system 30 comprises, and when using in Fig. 4, there is following concrete application part unit wherein:
Base band CPU element 4022 mutual control information and digital audio-frequency datas in Bus Interface Unit 4036 and the baseband chip 402.
Modulo unit 4032 receives the analog audio data of base band speech analog to digital converter 4021 outputs in MIC unit 401 and the baseband chip 402, can also receive the analog audio data of FM module 407 inputs.
Modulo unit 4032 among Fig. 4 comprises: analog to digital converter a1 and analog to digital converter a2, and with two analog to digital converters two gates of cascade are promptly mutually respectively: gate a1 and gate a2.The gate a1 that one tunnel analog audio data of mobile phone MIC4011, headset MIC4012, FM module 407 enters in the modulo unit 4032 in the MIC unit 401 carries out entering analog to digital converter a1 behind the gating, and the gate a2 that the analog audio data of base band speech analog to digital converter 4021 outputs enters in the modulo unit 4032 in another road analog audio data of FM module 407 and the baseband chip 402 carries out entering analog to digital converter a2 behind the gating.
The input of D/A conversion unit 4034 can be the input of: dual track digital audio, that is: L channel and R channel among Fig. 4; The output of D/A conversion unit 4034 can be exported for triple-track among Fig. 4: analogue audio frequency output (L+R)/2 that L channel analogue audio frequency output L, R channel analogue audio frequency output R, left and right acoustic channels mix.
The gate and the power amplifier of four groups of cascades have been introduced among Fig. 4, wherein gate 1, gate 2, gate 3 and gate 4 are 5 input gates, concrete 5 are input as: the output of the output of gate a1, gate a2, and the output of the triple-track of D/A conversion unit 4034, totally 5 inputs.
Gate 1～gate 4 in the present embodiment, and it is fixed to come according to system applies, all is optional.
Power amplification unit 40311 comprises earphone power amplifier 403111, loudspeaker power amplifier 403112, linear power amplifier 403113, can also comprise receiver power amplifier 403114.Wherein the analog audio data of earphone power amplifier 403111, loudspeaker power amplifier 403112,403114 outputs of receiver power amplifier sends to and listens to unit 404, and the analog audio data of linear power amplifier 403113 outputs sends to the base band speech analog to digital converter 4021 of baseband chip 402.
Described earphone power amplifier 403111 is used to drive earphone; Described loudspeaker power amplifier 403112 is used to drive loudspeaker 4041; Described receiver power amplifier 403114 is used to drive receiver 4043; Described linear power amplifier 403113 can be used for driving the speech input analog-to-digital converter of baseband chip 402.Wherein, receiver power amplifier 403114 is optional module, directly realizes receiver 4043 functions with loudspeaker 4041 in some mobile phone terminal system.
USB controller 4037 connects audio frequency processing system 403 and external USB interface, with outside interaction data.
By USB controller 4037, the mobile phone terminal system among Fig. 4 can link to each other with PC, carries out communication mutually under the CPU of audio frequency processing system 403 control.By certain agreement USB controller 4037 coupled PC is realized: to transmit information with the CPU of audio frequency processing system 403; By storage control 4038 visit exterior storage mediums 405, thereby make the mobile phone terminal system finish the function of a USB flash disk; In the presence of the CPU of audio frequency processing system 403, carry out communication via Bus Interface Unit 4036 with base band CPU, when connecting the mobile phone terminal system by USB controller 4037 in self usb host controller connection layout 4 such as: PC, if the mobile phone terminal system can surf the Net, PC also can be realized wireless networking capabilities.The usb host controller of described PC is the console controller of the usb bus in the PC system.
Storage control 4038 is realized the exchanges data with exterior storage medium 405 is finished in the control of exterior storage medium 405 visits.
Listening to unit 404 comprises: loudspeaker 4041 and headset earphone 4042 also can comprise receiver 4043 usually.
Be driven after the analog audio data of loudspeaker power amplifier 403112 outputs in the loudspeaker 4041 reception audio frequency processing systems 403.
Described loudspeaker 4041 are used to play the tinkle of bells or playing back music, also are used to receive calls as receiver 4043 functions in some mobile phone terminal system.
Be driven after the analog audio data that earphone power amplifier 403111 in the headset earphone 4042 reception audio frequency processing systems 403 sends.
Described headset earphone 4042 is used to connect makes a phone call or listens to music.
Be driven after the analog audio data that receiver power amplifier 403114 in the receiver 4043 reception audio frequency processing systems 403 sends.
Speech when described receiver 4043 is used for common making a phone call is answered.
If directly realize receiver 4043 functions with loudspeaker 4041 in the mobile phone terminal system, at this moment, the receiver Unit 4043 among Fig. 4 can omit.
RF module 408 is connected with baseband chip 402 by base band RF interface module 4025, receive to be subjected to send to base band RF interface module 4025 behind the speech, 4025 transmissions of reception base band RF interface module send speech after launch.
Audio-frequency assembly 406 is generally audio decoder 40333, and the digital audio-frequency data of audio-frequency assembly 406 outputs enters the pcm audio input unit 4039 in the audio frequency processing system 403.
Storage medium 405 and storage control 4038 interaction datas, promptly by storage control 4038, storage medium 405 can receive the digital audio-frequency data of audio frequency processing system 403 outputs, also can provide digital audio-frequency data to audio frequency processing system 403.Such as: by storage control 4038, the CPU element 4031 of audio frequency processing system 403 can be to storage medium 405 storage data or from storage medium 405 reading of data.In addition, by storage control 4038, base band CPU element 4022 also can be to storage medium 405 storage data or from storage medium 405 reading of data.
Described storage medium 405 can be storage chip or External memory equipment.Wherein storage chip can right and wrong (NAND) type stores medium 405, dodges (Flash) card such as NAND; External memory equipment can be hard disk or multimedia controller (MMC) card or secure digital (SD) card etc.
FM module 407 is a FM FM radio module, and it is output as analogue audio frequency output among Fig. 4.
In fact the output of FM module 407 can be analog audio data, also can be digital audio-frequency data.In the present embodiment FM module 407 output be analog audio data the time, as shown in Figure 4, enter the modulo unit 4032 in the audio frequency processing system 403; If FM module 407 output be digital audio-frequency data the time, then can enter digital signal processing unit 4033 again through entering the pcm audio input unit 4039 in the audio frequency processing system 403 after audio-frequency assembly 406 decodings.
Mobile phone terminal system shown in Figure 4 can realize multiple function, such as:
1, common phone functions:
Make a phone call to comprise two processes in the present embodiment: send words, promptly speech sends; Talked about, promptly speech is listened to.
Wherein, the transmission path of signal is when sending words: speech is launched via the RF module 408 that base band bus 4026, RF interface module 4025 arrive baseband chip 402 outsides via mobile phone MIC4011, gate a1, gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021 and baseband processor 4024;
The transmission path of signal is when being talked about: the RF module of baseband chip 402 outsides receives is subjected to voice signal to deliver to baseband processor 4024 via RF interface module 4025 to be handled, and is subjected to speech to arrive receivers 4043 via base band bus 4026, base band speech digital to analog converter 4023, gate a2, gate 1 and receiver power amplifier 403114 to listen to after the processing.
2, make a phone call by headset:
The transmission path of signal is when sending words: speech is launched via the RF module 408 that base band bus 4026, RF interface module 4025 arrive baseband chip 402 outsides via headset MIC4012, gate a1, gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021 and baseband processor 4024;
The transmission path of signal is when being talked about: the RF module 408 of baseband chip 402 outsides receives is subjected to voice signal to deliver to baseband processor 4024 via RF interface module 4025 to be handled, and is subjected to speech to arrive headset earphones 4042 via base band bus 4026, base band speech digital to analog converter 4023, gate a2, gate 2 and earphone power amplifier 403111 to listen to after the processing.
3, hands-free making a phone call
The transmission path of signal is when sending words: speech is launched via the RF module 408 that base band bus 4026, RF interface module 4025 arrive baseband chip 402 outsides via mobile phone MIC4011, gate a1, gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021 and baseband processor 4024;
The transmission path of signal is when being talked about: RF module 408 receives is subjected to voice signal to deliver to baseband processor 4024 via RF interface module 4025 to be handled, and is subjected to speech to arrive loudspeaker 4041 via base band bus 4026, base band speech digital to analog converter 4023, gate a2, gate 3 and loudspeaker power amplifier 403112 to listen to after the processing.
4, common making a phone call recorded simultaneously:
The transmission path of telecommunication signal is: telecommunication signal is launched via the RF module 408 that base band bus 4026, RF interface module 4025 arrive baseband chip 402 outsides via mobile phone MIC4011, gate a1, gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021 and baseband processor 4024;
The transmission path of accepted call signal is: RF module 408 receives is subjected to voice signal to deliver to baseband processor 4024 via RF interface module 4025 to be handled, and the accepted call signal after the processing arrives receivers 4043 via base band bus 4026, base band speech digital to analog converter 4023, gate a2, gate 1 and receiver power amplifier 403114 and answers.
The transmission path of recorded audio signals is:
Telecommunication signal is input to audio frequency synthesizer 40331 via mobile phone MIC4011, gate a1 and analog to digital converter a1; Accepted call signal is input to audio frequency synthesizer 40331 via base band speech digital to analog converter 4023, gate a2 and analog to digital converter a2; Send voice data and in audio frequency synthesizer 40331, synthesized by voice data; Because the data after this moment is synthetic do not need special effect processing, the data after therefore will synthesizing are directly inputted to audio coder 40334, and special efficacy audio process 40335 is in direct mode operation at this moment; The data of audio coder 40334 outputs store in the exterior storage medium 405 via storage control 4038.
5, hands-free making a phone call recorded simultaneously:
The transmission path of telecommunication signal is: telecommunication signal is launched via the RF module 408 that base band bus 4026, RF interface module 4025 arrive baseband chip 402 outsides via mobile phone MIC4011, gate a1, gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021 and baseband processor 4024;
The transmission path of accepted call signal is: RF module 408 receives is subjected to voice signal to deliver to baseband processor 4024 via RF interface module 4025 to be handled, accepted call signal after the processing arrives loudspeaker 4041 and answers via base band bus 4026, base band speech digital to analog converter 4023, gate a2, gate 3 and loudspeaker power amplifier 403112.
The transmission path of recorded audio signals is:
Telecommunication signal is input to audio frequency synthesizer 40331 via mobile phone MIC4011, gate a1 and analog to digital converter a1; Accepted call signal is input to audio frequency synthesizer 40331 via base band speech digital to analog converter 4023, gate a2 and analog to digital converter a2; Send voice data and in audio frequency synthesizer 40331, synthesized by voice data; Because the data after this moment is synthetic do not need special effect processing, the data after therefore will synthesizing are directly inputted to audio coder 40334, and special efficacy audio process 40335 is in direct mode operation at this moment; The data of audio coder 40334 outputs store in the exterior storage medium 405 via storage control 4038.
6, make a phone call to record simultaneously by headset:
The transmission path of signal is when sending words: speech is launched via the RF module 408 that base band bus 4026, RF interface module 4025 arrive baseband chip 402 outsides via headset MIC4012, gate a1, gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021 and baseband processor 4024;
The transmission path of signal is when being talked about: RF module 408 receives is subjected to voice signal to deliver to baseband processor 4024 via RF interface module 4025 to be handled, be subjected to speech via base band bus 4026, base band speech digital to analog converter 4023, gate a2, gate 2 and earphone power amplifier 403111 after the processing, arrive earphone and listen to.
The transmission path of recorded audio signals is:
Telecommunication signal is input to audio frequency synthesizer 40331 via headset MIC4012, gate a1 and analog to digital converter a1; Accepted call signal is input to audio frequency synthesizer 40331 via base band speech digital to analog converter 4023, gate a2 and analog to digital converter a2; Send voice data and in audio frequency synthesizer 40331, synthesized by voice data; Because the data after this moment is synthetic do not need special effect processing, the data after therefore will synthesizing are directly inputted to audio coder 40334, and special efficacy audio process 40335 is in direct mode operation at this moment; The data of audio coder 40334 outputs store in the exterior storage medium 405 via storage control 4038.
7, voice reproducing:
When carrying out voice reproducing, the mobile phone terminal system is equivalent to a portable player, and the detailed process of voice reproducing is:
1) source of sound of voice reproducing enters audio frequency synthesizer 40331.
The source of sound that enters audio frequency synthesizer 40331 can have multiple, and multiple source of sound can be also can be to enter audio frequency synthesizer 40331 concomitantly independently, and the process that multiple source of sound enters audio frequency synthesizer 40331 is:
Voice data in the exterior storage medium 405 is input to audio decoder 40333 via storage control 4038 and decodes, and is input to audio frequency synthesizer 40331 then;
Music data in the exterior storage medium 405 is input to audio frequency synthesizer 40332 via storage control 4038 and rebuilds, and is input to audio frequency synthesizer 40331 then;
The external audio data are decoded via the audio decoder 40333 that is input to of Bus Interface Unit 4036, are input to audio frequency synthesizer 40331 then;
Outside music data is rebuild via the audio frequency synthesizer 40332 that is input to of Bus Interface Unit 4036, is input to audio frequency synthesizer 40331 then;
External audio data or music data after rebuilding after the external audio decoder decoding or by the external audio synthesizer, are input to audio frequency synthesizer 40331 via pcm audio input unit 4039.
2) as if the playback simultaneously of a plurality of sources of sound, then these sources of sound need be synthesized in audio frequency synthesizer 40331, output to special efficacy audio process 40335 then, otherwise audio frequency synthesizer 40331 are operated in direct mode operation.
3) if voice data needs special effect processing, then finish this work, otherwise special efficacy audio process 40335 is operated in direct mode operation by special efficacy audio process 40335;
4) data of special efficacy audio process 40335 outputs are input to D/A conversion unit 4034, through gate 2 or gate 3, and earphone power amplifier 403111 or loudspeaker power amplifier 403112, carry out playback via headset earphone 4042 or loudspeaker 4041 at last.
8, the accompanying audio playback of making a phone call:
Telecommunication signal is input to audio frequency synthesizer 40331 via mobile phone MIC4011, gate a1 and analog to digital converter a1;
Accepted call signal is input to audio frequency synthesizer 40331 via base band speech digital to analog converter 4023, gate a2 and analog to digital converter a2.
The source of sound of voice reproducing enters audio frequency synthesizer 40331, the source of sound that enters audio frequency synthesizer 40331 can have multiple, multiple source of sound can be also can be to enter audio frequency synthesizer 40331 concomitantly independently, and the process that multiple source of sound enters audio frequency synthesizer 40331 is:
1) voice data in the exterior storage medium 405 is input to audio decoder 40333 via storage control 4038 and decodes, and is input to audio frequency synthesizer 40331 then;
2) music data in the exterior storage medium 405 is input to audio frequency synthesizer 40332 via storage control 4038 and rebuilds, and is input to audio frequency synthesizer 40331 then;
3) external audio data are decoded via the audio decoder 40333 that is input to of Bus Interface Unit 4036, are input to audio frequency synthesizer 40331 then;
4) outside music data is rebuild via the audio frequency synthesizer 40332 that is input to of Bus Interface Unit 4036, is input to audio frequency synthesizer 40331 then;
5) external audio data or music data after rebuilding after the external audio decoder decoding or by the external audio synthesizer, are input to audio frequency synthesizer 40331 via pcm audio input unit 4039.
If be subjected to speech to need accompanied by music, in audio frequency synthesizer 40331, synthesized by the voice data of speech and playback, arrive receiver 4043 via D/A converter module, gate 1, receiver power amplifier 403114 power amplifiers.
If be subjected to speech not need accompanied by music, the transmission path and the common pattern of making a phone call of signal are same when then sending words.
If send speech to need accompanied by music, then send the voice data of speech and playback in audio frequency synthesizer 40331, to be synthesized, via D/A converter module, gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021, baseband processor 4024, launch via the RF module 408 that base band bus 4026, RF interface module 4025 arrives baseband chips 402 outsides.
If send speech not need accompanied by music, the transmission path and the common pattern of making a phone call of signal are same when then sending words.
9, automatic answering machine machine:
When phone was squeezed into, under the control of base band CPU, human-computer interaction interface, hot key or preset program by the mobile phone terminal system made the mobile phone terminal system in the present embodiment enter the automatic answering machine pattern;
Under the control of base band MCU, the recording audio data answered that is stored in advance in the storage medium 405 is sent to audio decoder 40333 by storage control 4038 and decodes;
Decoded voice data need not the synthetic D/A conversion unit 4034 that directly arrives, via gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021 and baseband processor 4024, launch via the RF module 408 that base band bus 4026, RF interface module 4025 arrive baseband chip 402 outsides;
If the other side needs message, then the other side triggers a message, notifies this handset starting sound-recording function;
The path of recorded audio signals is identical in the transmission path of recorded audio signals and the common recording mode simultaneously of making a phone call, and is not described in detail in this.
10, the Kara OK function of band recording:
Sing sound by mobile phone MIC4011 input, be input to audio frequency synthesizer 40331 via gate a1 and analog to digital converter a1.
The source of sound of accompaniment music enters audio frequency synthesizer 40331, the source of sound that enters audio frequency synthesizer 40331 can have multiple, multiple source of sound can be also can be to enter audio frequency synthesizer 40331 concomitantly independently, the process that multiple source of sound enters audio frequency synthesizer 40331 is identical during with voice reproducing, is specially:
1) voice data in the exterior storage medium 405 is input to audio decoder 40333 via storage control 4038 and decodes, and is input to audio frequency synthesizer 40331 then;
2) music data in the exterior storage medium 405 is input to audio frequency synthesizer 40332 via storage control 4038 and rebuilds, and is input to audio frequency synthesizer 40331 then;
3) external audio data are decoded via the audio decoder 40333 that is input to of Bus Interface Unit 4036, are input to audio frequency synthesizer 40331 then;
4) outside music data is rebuild via the audio frequency synthesizer 40332 that is input to of Bus Interface Unit 4036, is input to audio frequency synthesizer 40331 then;
5) external audio data or music data after rebuilding after the external audio decoder decoding or by the external audio synthesizer, are input to audio frequency synthesizer 40331 via pcm audio input unit 4039.
Singing sound and accompaniment music mixes in audio frequency synthesizer 40331.
Voice data after synthetic is via D/A conversion unit 4034, gate 2 or gate 3, earphone power amplifier 403111 or loudspeaker power amplifier 403112, by headset earphone 4042 or loudspeaker 4041 playback.
Data after synthetic simultaneously also can enter audio coder 40334 and encode, store in the exterior storage medium 405 via storage control 4038.
11, FM receiver system:
If FM radio reception module is output as analog audio data in the system, then:
If need not special effect processing, then the audio frequency simulation data that demodulate through the FM wireless module are via gate a1 and gate a2, gate 2 or gate 3, earphone power amplifier 403111 or loudspeaker power amplifier 403112, after headset earphone 4042 or loudspeaker 4041 outputs;
If need special effect processing, then enter analog to digital converter a1 and analog to digital converter a2 respectively via gate a1 and gate a2 through the audio frequency simulation data that the FM wireless module demodulates; The data of analog to digital converter a1 and analog to digital converter a2 output are input to special efficacy audio process 40335 via audio frequency synthesizer 40331, and audio frequency synthesizer 40331 is in direct mode operation at this moment; If need not special effect processing, then special efficacy audio process 40335 is operated in direct mode operation, and digital audio-frequency data is directly inputted to D/A conversion unit 4034; The simulated audio signal of D/A conversion unit 4034 outputs is through gate 2 or gate 3, earphone power amplifier 403111 or loudspeaker power amplifier 403112, at last via headset earphone 4042 or loudspeaker 4041 outputs.
If FM radio reception module is output as digital audio-frequency data in the system, then:
Digital audio-frequency data through 407 outputs of FM module is input to audio frequency synthesizer 40331 via pcm audio input unit 4039, and audio frequency synthesizer 40331 is in direct mode operation at this moment; Data via audio frequency synthesizer 40331 are input to special efficacy audio process 40335; If need not special effect processing, then special efficacy audio process 40335 is operated in direct mode operation, and digital audio-frequency data is directly inputted to D/A conversion unit 4034; The simulated audio signal of D/A conversion unit 4034 outputs is through gate 2 or gate 3, earphone power amplifier 403111 or loudspeaker power amplifier 403112, at last via headset earphone 4042 or loudspeaker 4041 outputs.
12, recorder function:
Voice signal is input to audio frequency synthesizer 40331 via mobile phone MIC4011, gate a1 and analog to digital converter a1;
If do not need to add background music, then audio frequency synthesizer 40331 can be operated in direct mode operation; If need to add background music, background music enters audio frequency synthesizer 40331, the source of sound that enters audio frequency synthesizer 40331 can have multiple, multiple source of sound can be also can be to enter audio frequency synthesizer 40331 concomitantly independently, the process that multiple source of sound enters audio frequency synthesizer 40331 is identical during with voice reproducing, is specially:
1) voice data in the exterior storage medium 405 is input to audio decoder 40333 via storage control 4038 and decodes, and is input to audio frequency synthesizer 40331 then;
2) music data in the exterior storage medium 405 is input to audio frequency synthesizer 40332 via storage control 4038 and rebuilds, and is input to audio frequency synthesizer 40331 then;
3) external audio data are decoded via the audio decoder 40333 that is input to of Bus Interface Unit 4036, are input to audio frequency synthesizer 40331 then;
4) outside music data is rebuild via the audio frequency synthesizer 40332 that is input to of Bus Interface Unit 4036, is input to audio frequency synthesizer 40331 then;
5) external audio data or music data after rebuilding after the external audio decoder decoding or by the external audio synthesizer, are input to audio frequency synthesizer 40331 via pcm audio input unit 4039.
The data of audio frequency synthesizer 40331 output enter special efficacy audio process 40335 and are handled, if do not need special effect processing then this module can be operated in direct mode operation;
The data of special efficacy audio process 40335 outputs are deposited in the exterior storage medium 405 via storage control 4038 behind audio coder 40334 codings.
13, the short speech message of accompanied by music and voice Email:
This function is the applied in any combination of several functions, is specially:
At first utilize the recorder function to finish recording and storing of voice;
Under the control of base band MCU the voice messaging that records is carried out playback then, this moment, earphone power amplifier 403111 or loudspeaker power amplifier 403112 can be worked, and were used for the effect of monitoring recording;
The voice messaging of playback is input to D/A conversion unit 4034 via audio decoder 40334, audio frequency synthesizer 40331 and special efficacy audio process 40335, and its sound intermediate frequency synthesizer 40331 and special efficacy audio process 40335 can be operated in direct mode operation;
The simulated audio signal of D/A conversion unit 4034 outputs is launched via the RF module 408 that base band bus 4026, RF interface module 4025 arrive baseband chip 402 outsides through gate 4, linear power amplifier 403113, base band speech analog to digital converter 4021 and baseband processor 4024.
In addition, mobile phone terminal system shown in Figure 4 utilizes USB controller 4037, can realize PC USB wireless networking capabilities; Utilize USB controller 4037 and storage control 4038, realize movable storage device function etc.
Fig. 5 is the application schematic diagram of audio frequency processing system 30 in the MP3 player shown in Figure 3.The part relevant with audio frequency processing system in the MP3 player of only drawing among Fig. 5, the MP3 player among Fig. 5 comprises: FM module 501, audio frequency processing system 502, listen to unit 503, storage medium, can also comprise: MIC505, human-computer interaction interface 506.
During FM module 501 output analog audio data, enter the modulo unit 5029 in the audio frequency processing system 502, during the digital audio-frequency data of FM module 501 outputs, through entering the pcm audio input unit 50210 in the audio frequency processing system 502 after the audio-frequency assembly decoding.
Audio frequency processing system 502 among Fig. 5 mainly comprises: CPU element 5021, digital signal processing unit 5022, D/A conversion unit 5023, USB controller 5024, storage control 5025, gating unit 5026, power amplification unit 5027, the audio frequency processing system 502 among Fig. 5 can also comprise: modulo unit 5029, pcm audio input unit 50210.
Each Elementary Function that Fig. 5 sound intermediate frequency treatment system 502 comprises is identical with each Elementary Function that Fig. 3 sound intermediate frequency treatment system 30 comprises, and when using in Fig. 5, there is following concrete application part unit wherein:
Gating unit 5026 comprises gate 1 and gate 2.
Power amplification unit 5027 comprises earphone power amplifier 50271 and linear power amplifier, and wherein earphone power amplifier 50271 receives the data of gate 1 output; Linear power amplifier receives the data that gate 2 receives, and carries out exporting to outside loudspeaker after the power amplification, such as audio amplifier etc.
CPU element 5021 and human-computer interaction interface 506 mutual control information and state informations.Usually CPU element 5021 is by universal input/output interface and outside mutual control information and state information.
Modulo unit 5029 receives the analog audio data of FM module 501 outputs, can also receive the analog audio data of MIC505 input, and the modulo unit 5029 among Fig. 5 comprises: gate a1, modulus art transducer a1, analog to digital converter a2.
Gate a1 receives the analog audio data of MIC505 and 501 inputs of FM module to carry out outputing to analog to digital converter a1 behind the gating.
Analog to digital converter a1 receives the data of gate a1 output, outputs to digital signal processing unit 5022 after being converted to digital audio-frequency data.
After being converted to digital audio-frequency data, the analog audio data of analog to digital converter a2 reception FM module 501 outputs outputs to digital signal processing unit 5022.
When FM module 501 output be digital audio-frequency data the time, be input in the digital signal processing unit 5022 by pcm audio input unit 50210.
Listening to unit 503 comprises: headset earphone 5031 and loudspeaker or audio amplifier 5032.
Be driven after the analog audio data of earphone power amplifier 50271 outputs in the headset earphone 5031 reception audio frequency processing systems 502.
Be driven after the analog audio data of loudspeaker power amplifier 50272 outputs in loudspeaker or the audio amplifier 5032 reception audio frequency processing systems 502.
Storage medium is controlled by the storage control in the audio frequency processing system 502 5025, the digital audio-frequency data of storage is provided or receives digital audio-frequency datas from audio frequency processing system 502 to audio frequency processing system 502 and store.
MIC505 input analog audio data is to modulo unit 5029.
Human-computer interaction interface 506 is with the 5021 mutual control informations of the CPU element in the audio frequency treatment system 502.
After utilizing audio frequency processing system shown in Figure 3 30, MP3 processor shown in Figure 5 can be realized Kara OK function.
The above is preferred embodiment of the present invention only, is not to be used to limit protection scope of the present invention.

Claims (20)

1, a kind of audio frequency processing system, comprise: receive outside input control information and be transmitted to the control unit of each unit of audio frequency processing system, be connected with each unit of audio frequency processing system and the control bus of transmitting control information, dateout are given the digital signal processing unit of D/A conversion unit, the D/A conversion unit of receiving digital signals processing unit dateout by control bus, it is characterized in that this system further comprises:
Modulo unit receives outside at least one road analog audio data of importing, and the outputting digital audio data were given digital signal processing unit after the output analog audio data was given the analogue audio frequency bus or carried out analog-to-digital conversion;
Gating unit receives the data on the analogue audio frequency bus, carries out exporting at least one circuit-switched data to outside behind the gating;
The analogue audio frequency bus, the analog audio data of reception modulo unit, D/A conversion unit output is transmitted to gating unit;
Digital signal processing unit further receives the digital audio-frequency data of modulo unit output, directly or carry out exporting to D/A conversion unit after the digital processing;
The data that D/A conversion unit further will carry out after the digital-to-analogue conversion are exported to the analogue audio frequency bus.
2, system according to claim 1 is characterized in that, described modulo unit comprises: at least one analog to digital converter.
3, system according to claim 2 is characterized in that, described modulo unit further comprises: at least one gate;
Each gate receives at least one road analog audio data of outside input, carries out exporting a circuit-switched data to an analog to digital converter or analogue audio frequency bus behind the gating.
4, system according to claim 1 is characterized in that, described digital signal processing unit comprises: the audio frequency synthesizer;
The audio frequency synthesizer receives the data of modulo unit output, directly or carry out audio frequency and export to D/A conversion unit after synthetic.
5, system according to claim 1 is characterized in that, described gating unit comprises: at least one gate;
Each gate receives the data of analogue audio frequency bus output, carries out exporting a circuit-switched data to outside behind the gating.
6, system according to claim 1 is characterized in that, described control unit is: Bus Interface Unit;
Bus Interface Unit receives the outside control information of importing is transmitted to each unit of audio frequency processing system by control bus control unit.
7, system according to claim 6 is characterized in that, this system further comprises: CPU element;
CPU element receives the control information that Bus Interface Unit is transmitted, and resolves the back and produces schedule information, by control bus schedule information is sent to each unit of audio frequency processing system.
8, system according to claim 1 is characterized in that, described control unit is: CPU element;
CPU element receives the control information of outside input, resolves the back and produces schedule information, by control bus schedule information is sent to each unit of audio frequency processing system.
9, system according to claim 1 is characterized in that, this system further comprises: the audio frequency processing system bus;
Digital signal processing unit receives the data on the audio frequency processing system bus, and sends data to the audio frequency processing system bus.
10, system according to claim 9 is characterized in that, this system further comprises: storage control and/or general-purpose serial bus USB controller;
Storage control is connected with the audio frequency processing system bus, and is connected with the outside, in order to the data interaction between control exterior storage medium and the audio frequency processing system;
The USB controller is connected with the audio frequency processing system bus, and is connected with the outside, in order to realize communicating by letter between external USB equipment and the audio frequency processing system.
11, system according to claim 9 is characterized in that, described control unit is: Bus Interface Unit;
Bus Interface Unit receives the voice data of outside input, is transmitted to the audio frequency processing system bus; Data forwarding on the audio frequency processing system bus is given outside.
12, system according to claim 11 is characterized in that, this system further comprises: CPU element:
CPU element receives the data on the audio frequency processing system bus, carries out exporting to the audio frequency processing system bus after data parsing and the processing.
13, system according to claim 9 is characterized in that, described control unit is: CPU element;
CPU element receives the data on the audio frequency processing system bus, carries out exporting to the audio frequency processing system bus after data parsing and the processing.
14, according to each described system in the claim 9 to 13, it is characterized in that described digital signal processing unit comprises: the audio frequency synthesizer;
The audio frequency synthesizer receives the data on the audio frequency processing system bus, and sends data to the audio frequency processing system bus.
15, system according to claim 14 is characterized in that, described digital signal processing unit comprises: audio frequency synthesizer and/or audio decoder;
The audio frequency synthesizer receives the data on the audio frequency processing system bus, carries out exporting to the audio frequency synthesizer after audio frequency is rebuild;
Audio decoder receives the data on the audio frequency processing system bus, carries out exporting to the audio frequency synthesizer behind the audio decoder.
16, system according to claim 14 is characterized in that, described digital signal processing unit comprises: special efficacy audio process or audio coder;
The special efficacy audio process receives the data of audio frequency synthesizer output, directly or carry out exporting to D/A conversion unit and/or audio frequency processing system bus after special school handles;
Audio coder receives the data of audio frequency synthesizer output, carries out exporting to the audio frequency processing system bus behind the audio coding;
Or: special efficacy audio process and audio coder;
The special efficacy audio process receives the data of audio frequency synthesizer output, directly or carry out exporting to D/A conversion unit and/or audio coder after special school handles;
Audio coder receives the data of special efficacy audio process output, carries out exporting to the audio frequency processing system bus behind the audio coding.
17, system according to claim 4 is characterized in that, this system further comprises: the special efficacy audio process;
The special efficacy audio process receives the data of audio frequency synthesizer output, directly or carry out exporting to D/A conversion unit after special school handles.
18, system according to claim 1 is characterized in that, this system further comprises: power amplification unit;
Power amplification unit receives the data of gating unit output, carries out outputing to the outside after the power amplification.
19, system according to claim 18 is characterized in that, described power amplification unit comprises: at least one power amplifier.
20, system according to claim 1 is characterized in that, this system further comprises: pcm audio input unit and/or pcm audio output unit;
The pcm audio input unit receives the pcm audio data of outside input, is transmitted to digital signal processing unit;
Output to the outside after the pcm audio data of pcm audio output unit receiving digital signals processing unit output;
Correspondingly, digital signal processing unit further comprises: the pcm audio data and/or the output pcm audio data that receive the input of pcm audio input unit are given the pcm audio output unit.
CNB2005101359864A 2005-12-29 2005-12-29 Audio processing system Expired - Fee Related CN100525114C (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101594162B (en) * 2009-07-06 2012-09-12 青岛海信移动通信技术股份有限公司 Wireless internet access card
CN103391409A (en) * 2013-07-25 2013-11-13 张科峰 Operating system of multifunctional monitoring earphones
CN101866681B (en) * 2009-04-14 2014-02-12 英华达(上海)电子有限公司 Wireless network card with recording function
CN105740193A (en) * 2016-01-28 2016-07-06 青岛海信电器股份有限公司 USB (Universal Serial Bus) interface circuit, terminal equipment, signal interface and external equipment
US9713192B2 (en) 2015-03-27 2017-07-18 Intel Corporation Device and method for processing audio data
CN107168109A (en) * 2016-03-07 2017-09-15 中兴通讯股份有限公司 The adaptive cool-down method and device of a kind of mobile terminal

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101866681B (en) * 2009-04-14 2014-02-12 英华达(上海)电子有限公司 Wireless network card with recording function
CN101594162B (en) * 2009-07-06 2012-09-12 青岛海信移动通信技术股份有限公司 Wireless internet access card
CN103391409A (en) * 2013-07-25 2013-11-13 张科峰 Operating system of multifunctional monitoring earphones
US9713192B2 (en) 2015-03-27 2017-07-18 Intel Corporation Device and method for processing audio data
CN105740193A (en) * 2016-01-28 2016-07-06 青岛海信电器股份有限公司 USB (Universal Serial Bus) interface circuit, terminal equipment, signal interface and external equipment
CN105740193B (en) * 2016-01-28 2018-11-23 青岛海信电器股份有限公司 A kind of usb circuit, terminal device, signaling interface and external equipment
CN107168109A (en) * 2016-03-07 2017-09-15 中兴通讯股份有限公司 The adaptive cool-down method and device of a kind of mobile terminal

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