发明名称 |
MAINTAINING SYNCHRONIZATION OF STREAMING AUDIO AND VIDEO USING INTERNET PROTOCOL |
摘要 |
<p>A playback system in a digital cinema network synchronizes the presentation of visual and aural content by deriving timing information for packets of information that are conveyed in video and audio data streams, examining the timing information to determine if any misalignment between the two data streams is likely to be perceptible and, if the misalignment is deemed to be perceptible, introducing delays into one or both data streams to correct the misalignment. If the audio data stream precedes the video data stream, the audio data stream is delayed by an integer number of audio sample periods. If the video data stream precedes the audio data stream, the video data stream is delayed by an integer number of video frames and the audio data stream is delayed by an integer number of audio sample periods. Reduce the playback levels of audio content preceeding the inserted information and increase playback levels of audio content following the inserted information.</p> |
申请公布号 |
CA2567074(C) |
申请公布日期 |
2013.01.08 |
申请号 |
CA20052567074 |
申请日期 |
2005.04.08 |
申请人 |
DOLBY LABORATORIES LICENSING CORPORATION |
发明人 |
DAVIES, TREVOR;COULING, JOHN DAVID;LAKSHMINARAYANAN, GOPI;RICHARDS, MARTIN JOHN |
分类号 |
H04N21/242;H04J3/06;H04L12/28;H04L12/56;H04N7/24;H04N7/52;H04N7/62 |
主分类号 |
H04N21/242 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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