Study On The Techniques Of Real-time Compression Of Video In UWA Communication

H.264 is the latest video coding standard developed by the cooperation of ITU and MPEG. based on H.263,it makes use of several critical technique.As a result,H.264 has a better performance than any other video coding standards. In contrast with the former standards,H.264 has distinct features:its compressibility is about twice as strong as H.263 or MPEG-4. However, the cost of the excellent performance is the great increase of computation complexity. As a result,general purpose MPU can not satisfy the requirement of the H.264 real-time application. The C64 series of TI are leaders of these high-performance digital signal processors. This paper mainly researches on H.264 key technology of video coding and H.264 video encoder implementation and optimization based on TI_TM320C6416 DSP.First of all, the history of video coding standards is reviewed and some background knowledge on video compression technoglogy is presented. The evolution of H.264 and other international video compression standards are briefly presented.Moreover,H.264 en-decoder is introduced,including encoding framework,the key techniques in H.264 is discussed. Furthermore, three famous H.264 test models are introduced and tested,then T264 reference software is adopted as H.264 coder and realized in VC.The second half part of this paper based on the study of the hardware structure of the DSP chip, TMS320C6416 DSK is chosen as hardware platform,H.264 encoder is transplanted into TI C6416 and some optimization is completed. Experimental results and parameter are presented to verify the effectiveness of the optimization.Finally the work is summarized and the future direction is put forward.