According to the demand of improving image resolution in the embedded video equipment, combined with H.264 video compression technology and embedded technology, an embedded high-definition video codec based on ethernet was designed with Huawei Hisilicon multimedia processor as core chip in hardware platform; in the Linux development environment, C language is used to write the software of the high definition codec. Based on the H.264 intra-frame prediction algorithm, an optimization algorithm of H.264 intra-frame prediction is put forward. The result shows that this high-definition video codec can reduce the complexity of the intra-frame prediction without significantly reduced under the premise of image quality, and finally improve the effectiveness of video coding in real time. An embedded ethernet-based HD video codec test platform is built and debugging and the experiment are carried out, the results show that the video codec has a good way to implement of encoding and decoding with HD video and also transmission and broadcasting.%针对提高嵌入式视频设备图像清晰度的需求，结合H.264视频压缩技术和嵌入式技术研制了一种高清视频编解码器，提出了基于以太网的嵌入式高清视频编解码器的设计方案，以Hi3517和Hi3531为核心，设计了高清视频编解码器的硬件；在Linux开发环境下采用C语言编写了高清视频编解码器的软件；研究了H.264帧内预测算法，提出了一种针对本文中视频编解码器的H.264帧内预测优化算法.结果表明，该高清视频编解码器在没有明显降低图像质量的前提下，显著减少了帧内预测算法的复杂度，提高了视频编码的有效性和实时性.搭建了基于以太网的嵌入式高清视频编解码器的测试平台，并且进行了调试与实验.实验结果表明，该高清视频编解码器可以实时地完成对高清视频的采集、编码、传输、解码和播放.
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