A method for random access and gradual picture refresh in...

Details A method for random access and gradual picture refresh in... A method for random access and gradual picture refresh in...

H - Electricity

04

N

H04N 7/12 (2006.01) H04N 7/26 (2006.01) H04N 7/50 (2006.01) H04N 7/64 (2006.01)

Patent

CA 2492751

A method and associated apparatus for providing random access to, and a gradual refresh of, encoded video sequences (Fig. E). Gradual decoder refresh is enabled through the use of isolated regions, flexible macro block order (Fig. 4), and turn-off of loop filter at slice boundaries. Mechanism are also provided for reliable detection of random access operations and for the reliable signaling of leading frames and open decoder refresh (ODR) picture.

Cette invention concerne un procédé et un dispositif connexe permettant d'accéder à des séquences vidéo codées et de les rafraîchir progressivement. Le rafraîchissement progressif par décodeur est rendu possible par l'emploi de régions isolées, d'un ordre de macroblocs flexibles et de la coupure du filtre de boucle aux limites de tranches. L'invention concerne également des mécanisme de détection fiable d'opérations d'accès aléatoire et de signalisation fiable d'images de tête et d'images rafraîchies pour décodeur ouvert.

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