介绍视频处理过程中涉及到的两个颜色空间：RGB和YCbCr，以及他们之间的转换。用查表法优化媒体播放软件中YCbCr到RGB的转换，以达到提高转换速度，减少计算量，提高视频解码整体性能的Ifl的。-Introduction video processing involved in the two color spaces: RGB and YCbCr, and convert between them. Using look-up table to optimize the media playback software YCbCr to RGB conversion, in order to achieve improved conversion rate, reduce computation and improve the overall performance of the Ifl video decoding of.