A METHOD AND APPARATUS FOR FINDING A CORRECT SYNCHRONIZATION POINT WITHIN A DATA STREAM

摘要

The present invention is a data processing system (data processing system) data stream precise synchronization point in (data stream) (synchronization point) comprising a plurality of video data packets (video data packet) and a plurality of audio data packets (audio data packet) from It relates to a method for specifying. Data stream (data stream) is monitored (monitor) for a video sync and video components in a data packet to the audio synchronization component from the audio data packet in (內). In response to detecting a video sync elements in the video data packet, the first is the audio data packet is, the first audio data packet inspection for a plurality of audio data packets of the video data packet, and then to determine whether including the audio synchronization component . In response to detecting the synchronization elements in the audio data, the audio packet, data packets follow directly behind the audio data packet is the test to determine the applied video data packet to the data packet comprises a video sync component. In response to detecting the audio synchronization component in the video data packet following the first packet of the audio data containing the video sync element, the synchronization point will be located in the video data packets. In response to detecting the synchronization elements in the video audio data packet immediately after the video data packet, the sync point will be located in the audio data packets. Sync points are used to set the starting point to begin the presentation of audio and video data from the data stream.