Audio processing system

Abstract

The invention discloses an audio processing system, which includes: a control unit, a control bus, a digital signal processing unit, and a digital-to-analog conversion unit that receives data output by the digital signal processing unit. It is characterized in that the system further includes: an analog-to-digital unit, Receive the analog audio data input from the outside, output the analog audio data to the analog audio bus or output the digital audio data to the digital signal processing unit after analog-to-digital conversion; the gating unit receives the data on the analog audio bus, outputs it to the External: the analog audio bus receives the analog audio data output by the analog-to-digital unit and the digital-to-analog conversion unit, and forwards it to the gate unit; the digital signal processing unit receives the digital audio data output by the analog-to-digital unit, and outputs it to the digital-analog directly or after digital processing Conversion unit; the digital-to-analog conversion unit outputs data to the analog audio bus. The system of the invention can introduce various audio sources, and realize various audio processing functions flexibly.

Description

technical field [0001] The invention relates to multimedia processing technology, in particular to an audio processing system. Background technique [0002] Multimedia systems often need to process audio data, and audio processing systems are also often used in mobile terminal systems or MP3 players. The MP3 (MPEG Audio Layer 3) is the third layer of the audio layer of the video and audio compression standard defined by the Moving Picture Experts Group. [0003] figure 1 It is a schematic structural diagram of an audio processing system in the prior art, figure 1 The audio processing system 10 shown mainly includes: a bus interface unit 101, a digital signal processing unit 102, a digital-to-analog conversion unit 103, and a speaker power amplifier 104, and may also include: a pulse code modulation (PCM, Pulse Code Modulation) audio input unit 105, PCM audio output unit 106 . [0004] The bus interface unit 101 is connected with the external bus 107, receives externally ...

AI Technical Summary

Problems solved by technology

[0042] The disadvantage of the audio processing system in the prior art is: the audio processing function is relatively single

[0043] 1) The analog audio data input to the audio processing system is relatively simple

for example figure 2 Only the analog receiving voice is input into the audio processing system 203, and the analog sending voice does not enter the audio processing system 203, so the audio processing system 203 cannot perform any processing on the analog sending voice, even in the analog receiving voice, the receiving voice entering the earpiece 2041 also cannot perform any processing

[0044] 2) No analog audio data enters the digital signal processing unit in the audio processing system

therefore figure 2 The digital signal processing unit 2032 in the audio processing system 203 can only carry out digital processing on the digital audio data entering the audio processing system 203

[0045] 3) The digital audio data input to the audio processing system is relatively simple, and can only receive digital audio data input through the bus interface unit or PCM audio input unit

[0046] It can be said that the function of the audio processing system in the prior art is relatively single

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