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1. 发明授权

US06249319B1 Method and apparatus for finding a correct synchronization point within a data stream 失效
标题翻译：用于在数据流内找到正确的同步点的方法和装置
公开(公告)号：US06249319B1
公开(公告)日：2001-06-19
申请号：US09050274
申请日：1998-03-30
申请人： Lauren L. Post
发明人： Lauren L. Post
IPC分类号： H04N9475
CPC分类号： H04N21/4307 , H04N21/2368 , H04N21/4305 , H04N21/4341
摘要： A method in a data processing system for locating a correct synchronization point in a data stream containing a plurality of video data packets and a plurality of audio data packets. A data stream is monitored for an audio synchronization factor within an audio data packet and for a video synchronization factor within a video data packet. In response to detecting a video synchronization factor in the video data packet, a first audio data packet from the plurality of audio data packets after the video data packet is examined to determine whether the first audio data packet contains an audio synchronization factor. In response to detecting an audio synchronization factor in the audio data packet, a data packet immediately following the audio data packet is examined to determine whether the data packet is a video data packet containing a video synchronization factor. The synchronization point is located in the video data packet in response detecting an audio synchronization factor in the first audio data packet after the video data packet containing the video synchronization factor. The synchronization point is located in the audio data packet in response to detecting the video synchronization factor in a video data packet immediately after the audio data packet. The synchronization point is used to set a start point to begin presentation of the audio and video data from the data stream.
摘要翻译：一种数据处理系统中的方法，用于在包含多个视频数据分组和多个音频数据分组的数据流中定位正确的同步点。监视音频数据分组内的音频同步因子和视频数据分组内的视频同步因子的数据流。响应于检测到视频数据分组中的视频同步因子，检查在视频数据分组之后的多个音频数据分组中的第一音频数据分组，以确定第一音频数据分组是否包含音频同步因子。响应于检测到音频数据分组中的音频同步因子，检查紧跟在音频数据分组之后的数据分组，以确定数据分组是否是包含视频同步因子的视频数据分组。响应于在包含视频同步因子的视频数据分组之后检测第一音频数据分组中的音频同步因子，同步点位于视频数据分组中。响应于在紧接音频数据包之后的视频数据分组中检测到视频同步因子，同步点位于音频数据分组中。同步点用于设置开始点以开始从数据流中呈现音频和视频数据。

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