DEMULTIPLEXER LOGIC FOR USE IN MPEG2 STREAMS

摘要

A demultiplexer for MPEG2 stream demultiplexes a MPEG2 transport stream(TS) multiplexed by using a decoder. The demultiplexer includes: a PAT depacketizer for receiving TS packet streams of PID '0', and transmitting PAT table to PID memory; PMT depacketizer for receiving PMT TS packet stream, and transmitting PMT table to PID memory; PID controller for controlling the PAT depacketizer and PMT depacketizer, and transmitting a record enable signal to a elementary stream buffer; PID memory for storing the PAT table data and the PMT table data, using a user-set program number as an address when accessing the PAT table data, using PID value as an address when accessing the PMT table data; elementary stream buffer for recording the data according to the record enable signal from the PID controller; and a elementary stream decoder for decoding each elementary stream.