If the processing does not respect the AV-sync error, it will increase whenever data gets lost because of transmission errors or because of missing or mis-timed processing.Įxamples of transmission broadcastingreception and playback that can get the AV-sync incorrectly synchronized.

The processing of data must respect the relative data timing by e. In industry terminology the lip sync error is expressed as an amount of time the audio departs from perfect synchronization with the video where a positive time number indicates the audio leads the video and a negative number indicates the audio lags the video.ĭigital or analog audio video streams or video files usually contain some sort of synchronization mechanism, either in the form of interleaved video and audio data or by explicit relative timestamping of data. Audio-to-video synchronization also known as lip syncor by the lack of it: lip sync errorlip flap refers to the relative timing of audio sound and video image parts during creation, post-production mixingtransmissionreception and play-back processing.ĪV synchronization can be an issue in televisionvideoconferencingor film.