METHODS AND APPARATUS FOR ADAPTIVE GEOMETRIC PARTITIONING FOR VIDEO DECODING
There are provided methods and apparatus for adaptive geometric partitioning for video encoding and decoding. An apparatus includes an encoder for encoding image data corresponding to pictures by adaptively partitioning at least portions of the pictures responsive to at least one parametric model. The at least one parametric model involves at least one of implicit and explicit formulation of at least one curve.
1 . An apparatus, comprising:
a memory; and
at least one processor coupled to the memory, the at least one processor being configured to:
decode image data corresponding to picture blocks by reconstructing at least portions of a current picture block, said current picture block being partitioned using at least one current parametric model, wherein the at least one current parametric model involves at least implicit formulation based on at least one curve, said at least one curve being defined by a polynomial equation with a degree equal to one, and wherein partition model parameters associated with said at least one current parametric model are predicted from at least previous partition model parameters associated with at least one previous decoded spatial neighboring picture block.
2 . The apparatus of claim 1 , wherein said least one previous decoded spatial neighboring picture block is associated with a first parametric model involving at least implicit formulation based on a first, and said first curve being derived from a geometric signal model.
3 . The apparatus of claim 1 , wherein said at least one previous decoded spatial neighboring picture block is associated with a first parametric model involving at least implicit formulation based on a first curve, and said first curve describes at least one of, one or more image contours, and, one or more motion boundaries.
4 . The apparatus of claim 1 , wherein a precision of said partition model parameters associated with said at least one current parametric model is adapted in order to control at least one of decompression efficiency and decoding complexity.
5 . The apparatus of claim 4 , wherein the precision of said partition model parameters associated with said at least one current parametric model is adapted depending on a decompression quality parameter.
6 . The apparatus of claim 1 , wherein predictor data, associated with at least one partition of said current picture block, is predicted from at least one of spatial neighboring blocks and temporal neighboring blocks.
7 . The apparatus of claim 1 , wherein said apparatus is an extended version of an existing hybrid predictive decoder of an existing video coding standard or video coding recommendation.
8 . The apparatus of claim 7 , wherein said at least one processor is further configured to adapt at least one of an inverse residual transform and a de-quantization procedure depending on the selected parametric model-based partition if this is in use.
9 . The apparatus of claim 7 , wherein a picture block corresponds to either a macroblock or a sub-macroblock.
10 . The apparatus of claim 9 , wherein parametric model-based coding modes are inserted within existing macroblock and sub-macroblock coding modes of an existing video coding standard or video coding recommendation.
11 . The apparatus of claim 9 , wherein said apparatus is an extended version of a decoder for the International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) Moving Picture Experts Group-4 (MPEG-4) Part 10 Advanced Video Coding (AVC) standard/International Telecommunication Union, Telecommunication Sector (ITU-T) H.264 recommendation.
12 . The apparatus of claim 9 , wherein said at least one processor is further configured to apply at least one of deblocking filtering and reference frame filtering adapted to handle transform-size blocks affected by at least one parametric mode based partition due to non-tree-based partitioning of the at least one of the macroblocks and the sub-macroblocks when parametric model based partition modes are used, and wherein the deblocking filtering and the reference frame filtering is dependent upon at least one of whichever one of the at least one parametric model-based partition is used and a selected shape of the at least one parametric model-based partition.
13 . The apparatus of claim 1 , wherein said partition model parameters associated with said at least one current parametric model are predicted from at least previous partition model parameters associated with at least two previous decoded spatial neighboring picture block.
14 . A method, comprising:
decoding image data corresponding to picture blocks by reconstructing at least portions of a current picture block partitioned using at least one current parametric model, wherein the at least one current parametric model involves at least implicit formulation based on at least one curve, said at least one curve being defined by a polynomial equation with a degree equal to one, and wherein partition model parameters associated with said at least one current parametric model are predicted from at least previous partition model parameters associated with at least one previous decoded spatial neighboring picture block.
15 . The method of claim 14 , wherein said partition model parameters associated with said at least one current parametric model are predicted from at least previous partition model parameters associated with at least two previous decoded spatial neighboring picture block.
16 . The method of claim 14 , wherein said at least one previous decoded spatial neighboring picture block is associated with a first parametric model involving at least implicit formulation based on a first curve, and said first curve being derived from a geometric signal model.
17 . The method of claim 14 , wherein said at least one previous decoded spatial neighboring picture block is associated with a first parametric model involving at least implicit formulation based on a first curve, and said first curve describes at least one of, one or more image contours, and, one or more motion boundaries.
18 . The method of claim 14 , wherein a precision of said partition model parameters associated with said at least one current parametric model is adapted in order to control at least one of decompression efficiency and decoding complexity.
19 . The method of claim 18 , wherein the precision of said partition model parameters associated with said at least one current parametric model is adapted depending on a decompression quality parameter.
20 . The method of claim 14 , wherein predictor data, associated with at least one partition of said current picture block, is predicted from at least one of spatial neighboring blocks and temporal neighboring blocks.
21 . The method of claim 20 , wherein said decoding step adapts at least one of an inverse residual transform and a de-quantization procedure depending on the selected parametric model-based partition if this is in use.
22 . The method of claim 14 , wherein the decoding step is performed in an extended version of an existing hybrid predictive decoder of an existing video coding standard or video coding recommendation.
23 . The method of claim 22 , wherein a picture block corresponds to either a macroblock or a sub-macroblock.
24 . The method of claim 23 , wherein parametric model-based coding modes are inserted within existing macroblock and sub-macroblock coding modes of an existing video coding standard or video coding recommendation.
25 . The method of claim 23 , wherein said decoding step is performed in an extended version of a decoder for the International Organization for Standardization/International Electrotechnical Commission (ISO/IEC) Moving Picture Experts Group-4 (MPEG-4) Part 10 Advanced Video Coding (AVC) standard/International Telecommunication Union, Telecommunication Sector (ITU-T) H.264 recommendation.
26 . The method of claim 23 , wherein said decoding step applies at least one of deblocking filtering and reference frame filtering adapted to handle transform-size blocks affected by at least one parametric mode based partition due to non-tree-based partitioning of the at least one of the macroblocks and the sub-macroblocks when parametric model based partition modes are used, and wherein the deblocking filtering and the reference frame filtering is dependent upon at least one of whichever one of the at least one parametric model-based partition is used and a selected shape of the at least one parametric model-based partition.
27 . A non-transitory computer readable media having video signal data encoded thereupon, comprising:
image data corresponding to picture blocks encoded by adaptively partitioning at least portions of a current picture block responsive to at least one current parametric model, wherein the at least one current parametric model involves at least one of implicit formulation based on at least one curve, said at least one curve being defined by a polynomial equation with a degree equal to one, and wherein partition model parameters associated with said at least one current parametric model are predicted from at least previous partition model parameters associated with at least two previous decoded spatial neighboring picture blocks.