【摘要】 提出了基于H.263的快速压缩算法,并在高性能DSP芯片TMS320C62x上实时实现了该视频压缩标准。为了提高编解码的速度而提出了以下几个准则:改进的预测运动搜索法,基于边缘像素点的MSE运动匹配准则以及DCT及量化后产生零块的前判断准则,它们的使用极大地改善了编码器的性能。同时,针对DSP的特点还提出了一系列的优化方案。并且已经在TMS320C62x的开发板上完全实现了H.263协议,在CIF格式下能同时编解码20～25帧图像。更多还原

【Abstract】 This paper describes the implementation of H.263real-time video codec on TI ’s DSP TMS320C62x.This series of DSP utilize the advanced Very Long Instruction Word(VLIW)architecture,which makes them ideal for the high performance multimedia applications.To speed up the codec process,several techniques have been proposed,such as Modified Predictive Motion Estimation method(P-ME),Edge MSE matching criterion and Ze-ro-block Detection0before DCT and Quantization algorithm,which significantly improve the performance of the video coder.In addition,a series of optimizing schemes are presented for it.Now,on the EVM board it can pro-cess20～25frames of CIF(352×288)mode video sequences within a second.Multimedia applications such as consumer set-top boxes,videophones,videoconferencing etc will benefit from its performance.[更多还原