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US 2022/0030254 A1Published application
Video encoding device and video decoding device
AssigneesSharp Kabushiki Kaisha, FG Innovation Company Limited
InventorsTomoko AONO, Tomohiro IKAI
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Abstract
A device is provided with: a first transformer which transforms an coding unit (CU); and a second transformer which transforms a part of first transform coefficients output from the first transformer, wherein the second transformer transforms at least any of the first transform coefficients for a region (first region) having different sizes in a horizontal direction and a vertical direction or the first transform coefficients for a non-rectangular region (second region).
Claims3
A video decoding device for decoding a video, the video decoding device comprising:
- a memory;
- and
- a processor configured or programmed to execute instructions stored in the memory to:
- decode coded data and output quantization transform coefficients;
- perform an inverse quantization on the quantization transform coefficients and output secondary two-dimensional transform coefficients;
- arrange at least a portion of the secondary two-dimensional transform coefficients into secondary one-dimensional transform coefficients;
- perform an inverse secondary transform on the secondary one-dimensional transform coefficients and output primary one-dimensional inverse transform coefficients;
- arrange the primary one-dimensional inverse transform coefficients into primary two-dimensional inverse transform coefficients;
- and
- perform an inverse primary transform on the primary two-dimensional inverse transform coefficients, wherein,
- if a width of a transform coefficient's block is less than a predefined value or a height of the transform block is less than the predefined value, the primary one-dimensional inverse transform coefficients are stored in a squared region,
- otherwise the primary one-dimensional inverse transform coefficients are stored in a non-squared region.
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Dependencies are inferred from the claim text.