级联多节目编码复用器的设计与实现

System design and implementation of transport cascade multiplexer in SDTV

设计并实现了一种可级联的实时多节目复用器。该复用器以DSP和FPGA为主要器件,通过多个复用器的级联完成多路标准清晰度电视(SDTV)节目的复用。通过设定传输较高的码率,使前级复用器TS流包含较多空包,后级复用器用本地生成的TS包替代前级TS流中的空包。这样,通过多个复用器的级联,将多路标准清晰度电视节目复用到一路TS流中。

Design and implementation of a realtime transport cascade multiplexer in SDTV are discussed. The main devices of the system are DSP and FPGA. It can multiplex multiple SDTV programs into one TS stream through cascade of multiple multiplexers. Setting up a higher code rate, many null packets in TS stream can be generated by upper multiplexer, so local generated TS packets can be inserted into location of these null packets by cascade multiplexer. Through multiplexer cascade, multiple SDTV programs can be multiplexed into one TS stream. 