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HDTV的编码器是将HDTV的图像划分成几个子图分别进行编码，然后再合码流成HDTV的码流，图像的活动性分析可以提供田适应Q值选取所需的参数。在软件仿真的基础上，对TM5的算法针对硬件加以改进，提高了图像质量；并对如何用硬件、PLD实现进行了讨论。
HDTV encoder is the HDTV image is divided into several sub-pictures were encoded, and then combined into a stream of HDTV code stream, the image activity analysis can provide field adaptation Q value selection parameters. Based on the software simulation, the algorithm of TM5 is improved for hardware and the image quality is improved. And how to use hardware and PLD is discussed.