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TMS320DM8148: 关于DSP c674x将视频帧rgb24格式转换成YUV420的快速转换方法探讨

Part Number: TMS320DM8148

我在DSP c674x上将800*600像素的RGB24图像转换成YUV420格式,转换一张要花23ms,c674x的主频是750Mhz,大家有没有更快速的方法?下面是我的代码,用的查表法,或者这个代码还可以怎么改进,让转换速度更快?