Method and an apparatus for encoding/decoding residual coefficient
AssigneeKwangwoon University Industry-Academic Collaboration Foundation
InventorsDong Gyu Sim, Sea Nae Park
Life of this patent
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Abstract
The encoding/decoding method and apparatus according to the present invention derives a residual coefficient of a residual block, calculates a quantization parameter for a residual block, performs dequantization on a residual coefficient using a quantization parameter, and performs inverse transform on a dequantized residual coefficient to reconstruct a residual sample of a residual block.
Claims7
A method for decoding a video signal, comprising:
- deriving a residual coefficient of a residual block;
- calculating a quantization parameter for the residual block;
- performing inverse-quantization on the residual coefficient by using the calculated quantization parameter;
- and
- reconstructing a residual sample of the residual block by performing inverse-transform on the inverse-quantized residual coefficient,
- wherein an encoded residual coefficient for a partial region in the residual block is not transmitted from an encoding apparatus,
- wherein a residual sample of the partial region in the residual block is set equal to a default value pre-defined at a decoding apparatus,
- wherein the default value is 0, and
- wherein the partial region is representative of a region excluding at least one of N columns from a left side of the residual block or M rows from a top side of the residual block.
An apparatus for encoding a video signal, comprising:
- an entropy encoding unit configured to encode a residual coefficient of a residual block;
- an inverse-quantization unit configured to calculate a quantization parameter for the residual block and perform inverse-quantization on the residual coefficient by using the calculated quantization parameter;
- and
- an inverse-transform unit configured to reconstruct a residual sample of the residual block by performing inverse-transform on the inverse-quantized residual coefficient,
- wherein a residual coefficient for a partial region in the residual block is not encoded,
- wherein a residual sample of a partial region in the residual block is set equal to a default value pre-defined at an encoding apparatus,
- wherein the default value is 0, and
- wherein the partial region is representative of a region excluding at least one of N columns from a left side of the residual block or M rows from a top side of the residual block.
A non-transitory computer-readable storage medium having instructions stored thereon that, when executed, cause one or more processor to:
- derive a residual coefficient of a residual block;
- calculate a quantization parameter for the residual block;
- perform inverse-quantization on the residual coefficient by using the calculated quantization parameter;
- and
- reconstruct a residual sample of the residual block by performing inverse-transform on the inverse-quantized residual coefficient,
- wherein an encoded residual coefficient for a partial region in the residual block is not transmitted from an encoding apparatus,
- wherein a residual sample of a partial region in the residual block is set equal to a pre-defined default value
- wherein the default value is 0, and
- wherein the partial region is representative of a region excluding at least one of N columns from a left side of the residual block or M rows from a top side of the residual block.
Dependencies are inferred from the claim text.