Patent ID: 6504994
Filing Date: 2003-01-07
Classification: G11B,H04N

Abstract:
A data reproduction apparatus for reproducing data from a data storage medium with encoded data including decoding start time information stored therein, comprising:readout means for reading said encoded data from the data storage medium; decoding means for decoding said encoded data; detection means for detecting said decoding start time information; a reference clock for counting a predetermined clock; and control means for comparing, in the normal reproduction state, the value of said reference clock with said decoding start time information to detect a synchronization error in order to eliminate the difference between said decoding start time information and the value of said reference clock based on the result of comparison; whereby said data from said data storage medium includes multiplexed data of at least two types selected from the group consisting of video data, audio data and superimposed dialogue data; and whereby said apparatus determines a multiplexing state of said data based on contents information, and whereby, following a failure to determine said multiplexing state based on said contents information, said apparatus determines said multiplexing state by detecting the presence or absence of a plurality of decoding time stamps within a predetermined period of time.