Patent ID: 6339675
Filing Date: 2002-01-15
Classification: H04N

Abstract:
A synchronization error control apparatus comprising:a player for reproducing a multiplexed information signal formed from a coded video signal and a coded audio signal; a demultiplexer for isolating said coded video signal and said coded audio signal from said multiplexed information signal; a video decoder for decoding said coded video signal isolated by said demultiplexer to generate a decoded video signal; an audio decoder for decoding said coded audio signal isolated by said demultiplexer to generate a decoded audio signal; and a controller for resetting a system time clock serving as a system time reference for said apparatus with time management information contained in said decoded video signal, and for comparing said reset time with time management information included in said decoded audio signal; wherein said comparison results in setting a video advance flag if the decoded video signal is temporally advanced in relation to the decoded audio signal or setting a video delay flag if the decoded video signal is temporally delayed in relation to said decoded audio signal, and wherein said controller uses said video advance flag or said video delay flag to control synchronization between said decoded video signals and said decoded audio signals.