Method and apparatus for reducing jitter of a program clock reference in a tran sport stream of MPEG over ATM, and MPEG decoder

摘要

Disclosed is a method for reducing a jitter of a program clock reference in a transport stream of an MPEG signal transmitted over ATM system, which comprises: a step for correcting PCR to PCR-(T- delta ) if ¦PCR-STC¦ T- delta - DELTA is true and sign(PCR-STC)0 is true, correcting PCR to PCR+(T- delta ) if ¦PCR-STC¦ T- delta - DELTA is true and sign(PCR-STC)0 is false, and making no correction if ¦PCR-STC¦ T- delta - DELTA is false, wherein the program clock reference received is represented by PCR, a system time clock at the time when the program clock reference is received is represented by STC, a period of a transport stream packet at an output terminal of an MPEG encoder is represented by T, a packet transmission time of the transport stream packet at an input terminal of the apparatus is represented by delta , and a tolerable range is represented by DELTA . IMAGE