Video coding apparatus and video decoding apparatus
AssigneeSharp Kabushiki Kaisha
InventorsTomohiro IKAI, Tomoko AONO, Takeshi CHUJOH, Yukinobu YASUGI, Eiichi SASAKI
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Abstract
Provided is a video decoding apparatus for decoding coded data of a tile group in which a picture is split into rectangular regions, the tile group being composed of segments, the video decoding apparatus including: a header decoder configured to decode the number of tiles, a WPP enabled flag, and a slice enabled flag indicating whether segments in a target tile group are rectangular tiles, CTU rows, or slices from a tile group header, wherein the header decoder is configured to decode only one of the number of tiles being two or more, the WPP enabled flag being 1, and the slice enabled flag being 1 in one tile group.
Claims4
A video decoding apparatus for decoding a picture, the video decoding apparatus comprising:
- a header decoding circuit that decodes an enabled flag, indicating whether a synchronization process for a Context-Adaptive Binary Arithmetic Coding (CABAC) is performed, in a parameter set, wherein
- the header decoding circuit derives a variable specifying a number of entry points based on a value of the enabled flag, and
- the header decoding circuit decodes a first syntax element and a second syntax element, in a case that a value of the variable is greater than 0,
- wherein the first syntax element plus one specifies an entry point offset, and
- the second syntax element plus one specifies the number of bits of the first syntax element.
A video encoding apparatus for encoding video data, the video encoding apparatus comprising:
- a header encoding circuit that encodes an enabled flag, indicating whether a synchronization process for a Context-Adaptive Binary Arithmetic Coding (CABAC) is performed, in a parameter set, wherein
- the header encoding circuit derives a variable specifying a number of entry points based on a value of the enabled flag, and
- the header encoding circuit encodes a first syntax element and a second syntax element, in a case that a value of the variable is greater than 0,
- wherein the first syntax element plus one specifies an entry point offset, and
- the second syntax element plus one specifies the number of bits of the first syntax element.
A video decoding method for decoding a picture, the video decoding method including:
- decoding an enabled flag, indicating whether a synchronization process for a Context-Adaptive Binary Arithmetic Coding (CABAC) is performed, in a parameter set;
- deriving a variable specifying a number of entry points based on a value of the enabled flag;
- and
- decoding a first syntax element and a second syntax element, in a case that a value of the variable is greater than 0,
- wherein
- the first syntax element plus one specifies an entry point offset, and
- the second syntax element plus one specifies the number of bits of the first syntax element.
Dependencies are inferred from the claim text.