Entropy coding for video processing applications

H - Electricity – 04 – N

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H04N 7/26 (2006.01) H03M 7/40 (2006.01)

Patent

CA 2682315

An entropy coding apparatus. In a specific embodiment, the entropy coding apparatus includes a renormalization process and an encode-decision process that communicates with the renormalization process. The encode-decision process is adapted to run in parallel with the renormalization process without the renormalization process being nested therein. In a more specific embodiment, the entropy coding apparatus includes an entropy encoder that is H.264 compliant. The encode-decision process includes a first mechanism for pre-computing certain parameters to eliminate the need to nest the renormalization process within the encode-decision process. The renormalization process and the encode-decision process are components of a Context Adaptive Binary Arithmetic Coding (CABAC) module.

L'invention concerne un appareil de codage entropique. Dans un mode de réalisation spécifique, l'appareil de codage entropique comporte un processus de renormalisation et un processus de codage-décision qui communique avec le processus de renormalisation. Le processus de décision de codage est conçu pour fonctionner en parallèle avec le processus de renormalisation, sans que ce dernier y soit emboîté. Dans un mode de réalisation plus spécifique, l'appareil de codage entropique comporte un codeur entropique conforme au H.264. Le processus de codage-décision comporte un premier mécanisme pour calculer au préalable certains paramètres en vue d'éliminer la nécessité d'intégrer le processus de renormalisation dans le processus de décision de codage. Les processus de renormalisation et de décision de codage sont des composants du module de codage arithmétique binaire contextuel (CABAC).

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