Image decoding device
AssigneeSharp Kabushiki Kaisha
InventorTomoyuki YAMAMOTO
Life of this patent
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Abstract
A video image decoding device (1) is equipped with a TT information decoder (14) that, in the case where encoded data includes merge/skip information that merges or skips presence information indicating whether or not frequency-domain transform coefficients are included in the quantized transform coefficients, does not decode the presence information, and a TT information inference unit (33) that, in the case where the encoded data includes merge/skip information that merges or skips the presence information, infers the presence information. The TT information decoder (14) uses presence information inferred by the TT information inference unit (33) to decode the encoded and quantized transform coefficients.
Claims2
(canceled)
An image decoding device comprising:
- a memory;
- a processor, wherein the processor configured to perform steps of (a) and (b);
- (a) inferring non-zero transform coefficient presence information indicating whether or not non-zero transform coefficients are included in a second block of quantized transform coefficients or decoding the non-zero transform coefficient presence information from encoded data, and
- (b) decoding the quantized transform coefficients, wherein
- the second block of quantized transform coefficients is obtained by splitting a transform unit and consists of 4×4 quantized transform coefficients,
- in a case where a target second block is, in a processing order, the second block lastly processed in a corresponding the transform unit, the non-zero transform coefficient presence information is inferred that the non-zero transform coefficients are present within the second block, and
- in the case where the non-zero transform coefficient presence information indicates that non-zero transform coefficients are present within the second block, decoding quantized transform coefficients within that second block from the encoded data, wherein
- the transform unit includes at least 16×16 and 32×32 as candidates of the transform unit size.
Dependencies are inferred from the claim text.