To　the　high　computational　complexity　problem　of　H.264　encoder　and　the　specific　features　of　TMS320DM642,　several　implementation　techniques　for　optimization　are　presented　in　this　paper　from　several　aspects,　including　algorithm,　data　transfer,　memory　and　Cache.　Finally,　H.264　baseline　profile　encoder　has　been　implemented　on　DSP　platform.　The　experimental　results　show　that,　for　the　video　sequences　with　CIF　format,　the　optimized　version　of　H.264　encoder　can　achieve　the　encoding　rate　of　more　than　24　frames　per　second,　which　is　able　to　meet　the　real　time　requirements.　Then,　based　on　the　optimized　H.264　encoder,　the　functionalities　of　real　time　capture,　encoding　and　network　transmission　of　video　data　have　been　implemented　based　on　real　time　operation　system　(RTOS)　of　DSP　platform,　which　demonstrates　that　the　proposed　optimization　schemes　are　practical.