The maintenance of sound (i.e., speech) exactly in step with movement in a visual image ( e.g., talking heads). A common cause is different transmission paths and transmission technologies for the sound and image signals. Within codec hardware, the processing time for the video portion of the signal is about 100 times longer than the audio processing time. Consequently, codecs usually incorporate adjustable audio delay circuitry to delay-equalize the two signals to maintain lip sync.
combining audio and video recording in such a way that the sound is perfectly synchronized with the action that produced it; especially synchronizing the movements of a speaker's lips with the sound of his speech
Audio and video being visibly out of step during DVD playback. Lip-sync is usually caused by poor disc authoring or DVD player firmware problems. This can often be fixed by firmware updates.
The maintenance of sound (i.e., speech) exactly in step with movement in a visual image (i.e., faces). Because the processing time for the video portion of the signal in a low-speed codec is about 100 times longer than the audio processing time, codecs usually incorporate adjustable audio delay circuitry to delay-equalize the two signals, to regain lip sync.
Simultaneous precise recording of image and sound so that the sound appears to be accurately superimposed on the image, especially if a person is speaking toward the camera.
Proper synchronization of video with audio -- lip movement with audible speech.
Synchronisation of mouth and lip movements in the image with speech on the soundtrack.
Lip-sync or Lip-synch (short for lip synchronization) is a technical term for matching lip movements with voice. The term refers both to a technique often used during musical performances and the production of film and Television programs, and to the problem of maintaining video and audio signals synchronized during post-production and transmission. It is also used to match lip movements of animated characters (including computer facial animation).
