Lossless intraframe encoding using golomb-rice

G - Physics – 06 – K

Patent

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G06K 9/36 (2006.01) G06T 9/00 (2006.01) H04N 7/26 (2006.01) G10L 19/00 (2006.01)

Patent

CA 2452649

An apparatus and method of intraframe encoding of digital frequency-domain data. The data comprises a plurality of slices each having a plurality of blocks (120). Each block has a DC component and a plurality of AC components (130). A first DC component value of each slice is encoded. Each subsequent DC component value of each slice is represented as the difference between it and the DC component value proceeding it. For lossless encoding, the initial DC component value of each slice and the differences are encoding using Golomb- Rice (138).

L'invention concerne un appareil et un procédé de codage d'intratrame de données de domaine de fréquence numérique. Ces données comprennent une pluralité de tranches, chaque tranche présentant une pluralité de blocs. Chaque bloc comporte un composant CC, et une pluralité de composants CA. Une première valeur du composant CC de chaque tranche est codée. Chaque valeur de composant CC suivante, de chaque tranche, est représentée en tant que différence entre cette valeur et la valeur de composant CC la précédant. Pour un codage sans perte, la valeur du composant CC initiale de chaque tranche, et les différences, sont codées au moyen d'un codage Golomb-Rice.

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