摘要:
Methods and apparatus are provided for deblocking filtering on non-local intra prediction. An apparatus includes an encoder for encoding picture data using non-local intra prediction. The encoder includes a deblocking filter configured for use with non-local intra prediction modes so as to deblock filter at least a portion of the picture data encoded using the non-local intra prediction.
摘要:
Methods and apparatus are provided for efficient video encoding and decoding of intra prediction mode. An apparatus includes a video encoder for encoding picture data for at least a block in a picture by determining a spatial pattern for a decoded intra prediction mode residue used to reconstruct the picture at the video encoder. The decoded intra prediction mode residue is obtained by inverse quantizing and inverse transforming a transformed and quantized difference between an original version of the block and at least one reference block. The spatial pattern is used to determine an intra prediction mode for encoding the block.
摘要:
Methods and apparatus are provided for explicit updates for symbol probabilities of an entropy encoder or decoder. An apparatus includes a video encoder having an entropy encoder for encoding symbols for picture data for at least a portion of a picture. An explicit update function is used to update probabilities of the symbols processed by the entropy encoder. The explicit update function at least one of is truncated at a threshold value and has a varying rate of adaptation.
摘要:
There are provided method and apparatus for filter parameter determination and selection responsive to variable transforms in sparsity-based de-artifact filtering. An apparatus includes an encoder for encoding picture data for at least a portion of a picture. The encoder includes a sparsity-based de-artifact filter for performing sparsity-based de-artifact filtering on the portion. One or more filter parameters for the sparsity-based de-artifact filtering are determined and selected responsive to variable transforms.
摘要:
Methods and apparatus are provided for region-based filter parameter selection for de-artifact filtering. An apparatus includes an encoder for encoding picture data for at least a region of a picture. The encoder includes a de-artifact filter for performing de-artifact filtering on the region using region-based filter parameter selection. The region includes any of a non-block-boundary, a block boundary, a combination thereof, and the non-block-boundary to an exclusion of any block boundaries.
摘要:
Methods and apparatus are provided for implicit and semi-implicit intra mode signaling for video encoders and decoders. An apparatus includes an encoder for encoding picture data for at least a portion of a picture. The encoder derives an intra mode to apply to the portion from neighboring template data and abstains from explicitly signaling the intra mode for the portion. The neighboring template data corresponds to a neighboring template formed from neighboring pixels with respect to the portion.
摘要:
Methods and apparatus are provided for adaptive filtering of prediction pixels for chroma components in video encoding and decoding. An apparatus includes a video encoder for encoding picture data for at least a portion of a picture. The video encoder includes an adaptive filter for performing filtering of prediction data used to generate an intra prediction for a chroma component of the portion of the picture. The filtering is adaptive with respect to at least one of filter parameters for the filtering and whether the filtering is used or bypassed.
摘要:
There are provided methods and apparatus for transform selection in video coding. An apparatus includes a video encoder for encoding at least a block in a picture by selecting a transform to apply to a residue of the block from a set of two or more available transforms. The transform is selected based on at least one of an inter prediction mode used to predict at least one reference for the block, one or more values corresponding to a motion vector, a value of a residue of one or more previously encoded blocks, a value of prediction data for the block, one or more transform selections of one or more neighboring reconstructed blocks, and a quantization step applied to transform coefficients for the residue of the block.
摘要:
Methods and apparatus are provided for adaptive transform selection for video encoding and decoding. An apparatus includes a video encoder for encoding at least a block in a picture using a transform. The transform used to encode the block is selected from a plurality of transforms. The plurality of transforms is adaptively updated during the encoding of the picture.
摘要:
Methods and apparatus are provided for video encoding and decoding using adaptive geometric partitioning. An apparatus includes an encoder for encoding picture data for a region in a picture using adaptive geometric partitioning, wherein a subset of geometric partitions used to code the picture data for the region is determined responsive to at least one of a distance and an angle. The distance is measured from a defined point within the region to a partition boundary. The angle is measured with respect to at least a line extending from the defined point within the region to the partition boundary.