Image encoding apparatus, image encoding method, and image...

H - Electricity – 04 – N

Patent

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Details

H04N 7/26 (2006.01) H04N 7/34 (2006.01)

Patent

CA 2757789

It is an object of the present invention to provide an image encoding apparatus, an image encoding method, and an image encoding program, which can homogenize image quality of an image as a whole without lowering encoding efficiency, be-ing operable at high speed, and reduce the size of circuit scale by performing macroblock shuffling without changing slice structure. Provided is an image encoding apparatus, including: a shuffling portion which collects and shuffles a plurality of mac-roblocks constituting image data from respective positions within an image; an encoding portion which performs space-frequency transform and entropy encoding on the plurality of macroblocks collected and shuffled by the shuffling portion, as a base unit; and a rate control portion which controls the encoding portion to adjust the rate of the plurality of macroblocks after the encoding.

La présente invention concerne un appareil de codage dimages, un procédé de codage dimages et un programme de codage dimages, capables dhomogénéiser la qualité dimage dune image dans son ensemble sans diminuer le rendement du codage, susceptibles dêtre exploités à grande vitesse et de réduire la taille des circuits en effectuant un réarrangement des macro-blocs sans modifier une structure de tranches. Lappareil de codage dimages selon linvention comprend : une partie de réarrangement qui rassemble et réarrange une pluralité de macro-blocs constituant des données dimage provenant de positions respectives au sein dune image; une partie de codage qui effectue une transformation espace-fréquence et un codage entropique sur la pluralité de macro-blocs rassemblés et réarrangés par la partie de réarrangement, en tant quunité de base; et une partie de régulation de taux qui commande la partie de codage de façon à régler le taux de la pluralité de macro-blocs après le codage.

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