Video encoder and its decoder
AssigneeKDDI R&D Laboratories Inc.
InventorsSei Naito, Tomonobu Yoshino
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Abstract
A video encoder according to the present invention improves coding efficiency of a super high definition video by setting an area of MB size and optimally determining size of the area. A locally decoded image (a) is subjected to frequency analysis in a frequency analyzing unit. Based on the result, an area setting unit sets a local area in a picture to which the maximum MB size is applied. An area boundary correcting unit corrects an area boundary in accordance with a representative motion characteristic, and an N-value calculating unit determines the maximum MB size (N×N) of each area based on a result of encoding a neighboring picture. The area setting and the N-value calculation are performed step by step.
Claims15
A video encoder capable of locally updating a maximum value of an MB size as a unit of motion-compensated prediction of an encoding process in a picture, comprising:
- an area setting unit which sets a local area in a picture to which a maximum MB size is applied;
- and
- an N-value calculating unit which determines the maximum MB size (N×N) of each area set by the area setting unit,
- wherein the area setting and the N-value calculation are performed step by step.
A video decoder capable of locally updating a maximum value of an MB size as a unit of motion-compensated prediction of a decoding process in a picture, comprising:
- an area setting unit which sets a local area in a picture to which a maximum MB size is applied;
- and
- an N-value calculating unit which determines the maximum MB size (N×N) of each area set by the area setting unit,
- wherein the area setting and the N-value calculation are performed step by step.
Dependencies are inferred from the claim text.