Design Of Network Audio Processing System Based On SNMP Technology

With the rapid development of Network technology and audio processing,the audio processing requirements are more and more, the occasions such astheater, amusement park, stadium, etc. This makes network audio processingtechnology advantage more prominent, we can use the existing network line fordata transmission control, as long as there is the network. It can be convenient toaudio data processing. And of course, it can saving the cost of development, meetthe users to audio transmission system scale and transmission qualityrequirements. In this background, the use of increasingly mature Ethernettechnology to transmit audio signal become very necessary.The purpose of this audio transmission system is to design an audioprocessing system based on SNMP technology, with can interconnect the networkaudio device both at home and abroad. The audio signal processing becameconvenient and rapid.The system is composed of DSP program design and PC applicationprogramming, the main chip of the hardware equipment is CS496122chip, whichdesigned by Circus Logic company. It supports the simple network managementprotocol and it has a built-in32-bit special audio processing DSP. Firstly, audiosignal through the AD conversion chip is converted into digital signals, then thesignals go into the audio DSP, which has download the DSP program, and DSPparameters can be set by PC application software, so the function of audio signalprocessing can realized. The processed signals go into the DA module, andoutgoing analog signal go through the op-amp. The system can achieveBidirectional16-channel audio input/output, and the control and monitoring ofaudio signals.In this design, according to the Cirrus Logic company provides information, I analysis the DSP internal algorithm carefully, in order to ensure that, when Ichange DSP parameters, the data I have send can accurately meet therequirements of DSP. Some important algorithms are parameter Equalizer,pressure limit device, gain, audio matrix, etc. By analyzing, through the formulachange the known parameters into the system data needed.The whole system development experiences preparation, the determinationof the design requirements, reading material understanding of the relevanttechnical information, code DSP programming and PC programming, thedebugging, the system test, and other stage. The design of the audio processingsystem has been used by the test.