G - Physics – 11 – B
Patent
G - Physics
11
B
G11B 27/031 (2006.01) G11B 27/10 (2006.01) G11B 27/30 (2006.01) H04N 7/52 (2006.01)
Patent
CA 2292425
To maintain lip-sync when a video signal has been edited or switched at a video frame boundary, the associated audio signal is advanced or retarded to the closest audio frame boundary. Any error introduced by this constraint is accumulated and carried forward to direct a subsequent advance or retard decision. In this way, the cumulative error can be kept within an acceptable tolerance.
Dans le but de maintenir la synchronisation audio en différé quand un signal vidéo a été édité ou commuté à la limite d'une image vidéo, on avance ou on retarde le signal audio associé jusqu'à la limite de l'image vidéo la plus proche. Toute erreur introduite par cette contrainte est accumulée et reportée vers l'avant afin de commander une décision ultérieure d'avance ou de retard. Ceci permet de conserver l'erreur cumulée dans des limites de tolérance acceptable.
British Broadcasting Corporation
Fetherstonhaugh & Co.
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