Encoding method and apparatus enabling fast channel change...

H - Electricity – 04 – N

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H04N 7/26 (2006.01) H04N 21/2365 (2011.01) H04N 7/50 (2006.01)

Patent

CA 2528037

A video encoder (100, 300, 500) and corresponding method (800) are described for enabling fast channel change of compressed video, where a video encoder (100, 300, 500) for receiving input pictures and providing compressed stream data includes a normal encoding portion (130, 330, 530) for receiving input pictures and providing normal stream data, a lower-quality encoding portion (140, 340, 540) for receiving input pictures and providing channel change stream data, and a multiplexor (150, 350, 550) in signal communication with each of the normal and lower-quality portions for receiving and combining the normal and channel change data streams.

La présente invention concerne un codeur vidéo (100, 300, 500) et un procédé correspondant (800) permettant un changement rapide de canal de vidéo comprimée. Le codeur vidéo (100, 300, 500) conçu pour recevoir des images d'entrée et fournir des flux de données comprimées comprend une unité de codage (130, 330, 530) conçue pour recevoir des images d'entrée et fournir des flux de données normaux, une unité de codage basse qualité (140, 340, 540) conçue pour recevoir des images d'entrée et fournir des flux de données de changement de canal, ainsi qu'un multiplexeur (150, 350, 550) en communication de signalisation avec chacune des unités normale et basse qualité et conçu pour recevoir et combiner les flux de données de changement de canal.

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