【摘要】 分析了JM 7.6解码器的结构,指出了影响速度的瓶颈,并且对亮度块运动补偿、色度块运动补偿以及帧内预测等耗时模块进行了优化,对程序的流程和数据结构进行了调整。试验结果表明,优化后程序的解码速度是参考代码JM 7.6的5倍左右,实现了L inux平台上720×480视频序列的实时解码。更多还原

【Abstract】 The architecture of the decoder based on JM7.6 is analyzed and the bottleneck pro-blem for influencing the decoding speed is pointed out.Then some time-consuming sections are optimized,such as luminance,chrominance motion compensations and intra prediction.Some processes and the data structure for the program are modified.Experimental result shows that the proposed method can increase the decoding speed about 5 times than that of JM7.6,and can realize the real-time decoding of 720×480 video frequency series on Linux.更多还原