Video telephony is a particularly challenging application.It combines communications algorithms,audio and video processing all of which must be processed in real-time.In order to bring video conferencing into the mainstream the right mix of standards,technology,cost and quality should be achieved.The first step in achieving this mix lies in the H.324 standards - a scheme set forth by the ITU for video conferencing over ordinary POTS.The second step lies in the implementation - hardware or software.Although H.324 is often implemented with fixed-function chips,the high implemented with fixed-function chips,the high performance of current processors allows efficient implementation of the standards in software.In this paper,we will describe a software implementation approach of the H.324 standard on TI's TMS320C80,a multiprocessor DSP with a highly parallelized instruction set.
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