Method and apparatus for audio and video synchronization timestamp rollover correction

摘要

There are provided methods and apparatus for audio and video synchronization timestamp rollover correction. A synchronization apparatus includes a synchronizer for providing synchronization information for synchronizing a video stream with an audio stream during any point in a broadcast thereof irrespective of whether the video stream and the audio stream have different rollover points for their respective timestamps. The synchronization information is encoded for an out of band transmission with respect to the broadcast of the audio and video streams.

主权项

1. An apparatus comprising:
a synchronizer having a processor, the synchronizer configured to provide synchronization information for synchronizing a video stream with an audio stream during a broadcast thereof using timestamps irrespective of whether the video stream and the audio stream have different rollover points for their respective timestamps and without utilization of additional video and audio streams, wherein the synchronization information specifies a timing relationship between at least one audio timestamp and at least one video timestamp included in the audio stream and the video stream, respectively, the synchronization information encoded for an out of band transmission with respect to the broadcast of the audio and video streams, the timestamps including a video stream timestamp for the video stream and an audio stream timestamp for the audio stream, the video stream timestamp and the audio stream timestamp being encoded for transmission.