Based On The The V2ip Study Of The Adsp-bf561 And Achieve

V2IP is voice and video transmission system based on IP, popularly used for safe monitor,video phone,emergency communication and so on. With the development of integrate circuit, the traditional way of several independent processor realizing V2IP have beed washed out, so far, V2IP can be realized on signle SOC chip, commonly, this chip is double cores processor or has assistance processor. V2IP is usually used or wirless network, in order to reduce the bandwidth, the audio and video data need be compressed, G.723,G.728,G.729 are commonly used for audio compress; about video compress arimethic, the representative is H.264,MPEG4,AVS and so on. It is very important for selecting appropriate arimethic for realization platform.This paper relies on CDMA network voice and video transmission system project, firstly, anslyses the need of project, selectes ADI's symmetry double cores which is Blackfin framework DSP processor ADSP-BF561 as core processor platform, the uClinux operation system as software platform, the voice codec is TI's TLV320AIC23B, the video codec is Philips's SAA7113; secondly, introduces commonly audio and video compress arithmetic, by comparing these arithmetic, selects G.729 for voice compress and H.264 for video compress, thirdly developing TLV320AIC23B voice drivers based on uClinux, the framework is ALSA, porting G.729 library that is supplied by ADI aimed at Blackfin to ADSP-BF561, developing SAA7113 video drivers under the ADSP-BF561's coreB, assisting the optimize of H.264, at the same time, designing the mechanism of data exchange between ADSP-BF561's coreA and coreB, it is high efficiency,mount of data,real time. Finally, by the test under CDMA environment, gives the result of test and analyses the result, the effect is all right, meet the need of system.