本标准定义了SMPTE ST 2073-1、ST 2073-3和ST 2073-4的扩展，以支持VC-5比特流中的部分。部分对比特流进行细分，以实现高级解码器功能，例如比特流内的快速搜索、错误检测和纠正、多分辨率解码和并发解码。

This standard defines extensions to SMPTE ST 2073-1, ST 2073-3, and ST 2073-4 to support sections in a VC-5 bitstream.Sections subdivide the bitstream to enable advanced decoder features such as fast seeking within the bitstream, error detection and correction, multi-resolution decoding, and concurrent decoding.