论述了MPEG2码流系统级的语法以及码流合成应作的语法处理。介绍了采用DSP为核心 ,配合EPLD通过软件实现的实时码流合成器设计 ,并给出了实现框图。采用高可靠性设计 ,成功地实现了国内第一个实时条状码流合成器。经过现场实际应用证明 ,其具有很高的可靠性和灵活性。 Discusses the system-level syntax of MPEG2 code stream and the syntactic processing of code stream synthesis. The design of real-time stream synthesizer using DSP as the core and EPLD software is introduced and the block diagram of the implementation is given. Using high reliability design, the successful realization of the first real-time bar code stream synthesizer. After field practical proof, it has high reliability and flexibility.