METHOD AND APPARATUS FOR RECORDING ON STORAGE MEDIUM OR REPLAYING FROM STORAGE MEDIUM DATA PACKETS OF TRANSPORT STREAM

摘要

PURPOSE: A method and apparatus are provided to capture transport stream time stamps for every Nth packet only and to merely calculate the missing time stamps, thereby software-processing time is saved for generating the time stamps required for real-time bitstream recording. CONSTITUTION: MPEG2 data streams contain data packets for a set of programs and time stamps for data synchronization purposes. An MPEG2 transport stream is assembled of fixed-length transport packets. The received transport packets of at least one specific program of the set of programs are stored using a DVD Streamer recorder or DVD-RAM recorder. For the real-time playback of recorded specific program data packets each packet needs a separate time stamp. For that reason a time stamp is to be captured for each data packet at recording time. However, capturing of time stamps from a transport stream is a very time consuming action in software implementation processing. Therefore, transport stream time stamps are captured for every Nth packet only and the missing time stamps are calculated.