这个文档里面有h.263的详细资料和源码，值得一看-the document inside the H.263 detailed information and source code, an eye-catcher

利用 Intel 芯片特性的视频压缩,解压源代码,效率堪称目前最高,支持H.263 H.264 编码,并且有H263 和 H264 的例子程序.-use Intel chips characteristics of video compression, decompression source code, his current maximum efficiency, H.264 supports H.263 coding, as well as H.263 and H264 examples

H263通信规范-H263 communications specification