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US 11,606,573 B2Granted
Inter-prediction candidate index coding independent of inter-prediction candidate list construction in video coding
AssigneeTexas Instruments Incorporated
InventorMinhua Zhou
Life of this patent
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Abstract
Methods are provided for inter-prediction candidate index coding independent of the construction of the corresponding inter-prediction candidate list, i.e., a merging candidate list or an advanced motion vector predictor list. A maximum allowed number of inter-prediction candidates for an inter-prediction candidate list is used for encoding the inter-prediction candidate index in an encoded bit stream. The maximum allowed number may be pre-determined or may be selected by the encoder and encoded in the bit stream. A decoder may then decode the index using the maximum allowed number of inter-prediction candidates independent of the construction of the corresponding inter-prediction candidate list.
Claims13
A method for decoding a picture from an encoded video bit stream, comprising:
- decoding the encoded video bit stream;
- extracting from the decoded video bit stream a maximum allowed number of merge candidates for a merge candidate list for a slice region comprising prediction units (PUs) wherein the maximum allowed number of merge candidates for the merge candidate list is the maximum allowed number of merge candidates for all the prediction units;
- determining a merge candidate index for a prediction unit (PU) in the slice region from the decoded video bit stream using the maximum allowed number of merge candidates in the slice region, wherein one less than the maximum allowed number of merge candidates is used as a maximum codeword size for truncated unary decoding of the merge candidate index;
- constructing a merge candidate list for the PU wherein the merge candidate list comprises the maximum allowed number of merge candidates;
- and
- reconstructing the PU using the merge candidate list for the PU and the merge candidate index for the PU.
3 more elements
A video system for decoding a picture from an encoded video bit stream, comprising:
- an entropy decoding component configured to:
- decode a maximum allowed number of merge candidates for a merge candidate list for a slice region of the picture comprising prediction units (PUs), wherein the maximum allowed number of merge candidates for the merge candidate list is the maximum allowed number of merge candidates for all the PUs;
- decode a merge candidate index for a prediction unit (PU) in the slice region using the maximum allowed number of merge candidates in the slice region wherein one less than the maximum allowed number of merge candidates is used as a maximum codeword size for truncated unary decoding of the merge candidate index;
- construct a merge candidate list for the PU wherein the merge candidate list comprises the maximum allowed number of merge candidates;
- an inverse quantization component coupled to the entropy decoding component and configured to de-quantize quantized transform coefficients of residual prediction units decoded from the encoded video bit stream;
- an inverse transform component coupled to the inverse quantization component and configured to inverse transform the de-quantized transform coefficients of residual prediction units from the inverse quantization component from a frequency domain to residual prediction units;
- a motion compensation component coupled to the entropy decoding component and configured to form reconstructed prediction units;
- and
- an adder component coupled to the motion compensation component and the inverse transform component and configured to combine residual prediction units and reconstructed prediction units.
6 more elements
A video system for decoding a picture from an encoded video bit stream, comprising:
- an entropy decoding component configured to:
- decode a maximum allowed number of merge candidates for a merge candidate list for a slice region of the picture comprising prediction units (PUs), wherein the maximum allowed number of merge candidates for the merge candidate list is the maximum allowed number of merge candidates for all the prediction units;
- decode a merge candidate index for a prediction unit (PU) in the slice region using the maximum allowed number of merge candidates in the slice region wherein one less than the maximum allowed number of merge candidates is used as a maximum codeword size for truncated unary decoding of the merge candidate index;
- construct a merge candidate list for the PU wherein the merge candidate list comprises the maximum allowed number of merge candidates;
- an inverse quantization component coupled to the entropy decoding component and configured to de-quantize quantized transform coefficients of residual prediction units decoded from the encoded video bit stream;
- an inverse transform component coupled to the inverse quantization component and configured to inverse transform the de-quantized transform coefficients of residual prediction units from the inverse quantization component from a frequency domain to residual prediction units;
- a motion compensation component coupled to the entropy decoding component and configured to form reconstructed prediction units;
- an adder component coupled to the motion compensation component and the inverse transform component and configured to combine residual prediction units and reconstructed prediction units;
- a memory coupled to the adder component and configured to store the picture;
- and
- a display coupled to the memory to display the picture.
8 more elements
Dependencies are inferred from the claim text.