Adaptive overlapped block motion compensation

A video decoding device configured to decode video data, the video decoding device comprising:

• a memory configured to store the video data;
• and
• one or more processors configured to
• determine an adaptation metric based on at least one pixel in a region of support for one of a first partition and a second partition of one or more blocks of the video data separated by a partition boundary, wherein the region of support is not the entire one or more blocks of the video data is not the entire one or more blocks of the video data, wherein the one or more processors are configured to, when determining the adaptation metric, determine the adaptation metric based on a difference between a first predicted pixel value for the at least one pixel in the region of support and a second predicted pixel value for the at least one pixel in the region of support, wherein the one or more blocks of the video data are each associated with a block size, wherein to determine the adaptation metric, the one or more processors are configured to determine the adaptation metric based on the at least one pixel and the block size of at least one of the one or more blocks of the video data, and
• adapt, based on the adaptation metric, application of an overlapped block motion compensation process to determine filtered predicted pixel values near the partition boundary for a first predicted block representative of the first partition of the video block, wherein to adapt application of the overlapped block motion compensation process, the one or more processors are further configured to adjust a filter strength of a filter applied to predicted pixel values near the partition boundary for the first predicted block representative of the first partition of the video block, wherein to adapt, based on the adaptation metric, application of the overlapped block motion compensation process, the one or more processors are further configured to selectively disable application of the overlapped block motion compensation process when the determined block size is less than a block size threshold, wherein the overlapped block motion compensation process comprises a fetching operation for fetching a line of pixels from the memory, and wherein the determined block size comprises one of a video block size or a transform block size identifying a size of a transform applied to the first partition of the block;
• and
• output video data decoded using the adapted overlapped block motion compensation process.

A video decoding device configured to decode video data, the video decoding device comprising:

• means for determining an adaptation metric based on at least one pixel in a region of support for one of a first partition and a second partition of one or more blocks of the video data separated by a partition boundary,
• wherein the region of support is not the entire one or more blocks of the video data is not the entire one or more blocks of the video data,
• wherein the means for determining the adaptation metric comprises means for determining the adaptation metric based on a difference between a first predicted pixel value for the at least one pixel in the region of support and a second predicted pixel value for the at least one pixel in the region of support, and
• wherein the one or more blocks of the video data are each associated with a block size,
• wherein the means for determining the adaptation metric further comprises means for determining the adaptation metric based on the at least one pixel and the block size of at least one of the one or more blocks of the video data;
• means for adapting, based on the adaptation metric, application of an overlapped block motion compensation process to determine filtered predicted pixel values near the partition boundary for a first predicted block representative of the first partition of the video block,
• wherein the means for adapting application of the overlapped block motion compensation process comprises means for adjusting a filter strength of a filter applied to predicted pixel values near the partition boundary for the first predicted block representative of the first partition of the video block;
• wherein the means for adapting, based on the adaptation metric, application of the overlapped block motion compensation process further comprises means for selectively disabling application of the overlapped block motion compensation process when the determined block size is less than a block size threshold,
• wherein the motion compensation process comprises a fetching operation for fetching a line of pixels from a memory, and
• wherein the determined block size comprises one of a video block size or a transform block size identifying a size of a transform applied to the first partition of the block;
• and
• means for outputting video data decoded using the adapted overlapped block motion compensation process.

A non-transitory computer-readable storage medium having stored thereon instructions that, when executed, cause one or more processors of a device for decoding video data to:

• determine an adaptation metric based on at least one pixel in a region of support for one of a first partition and a second partition of one or more blocks of the video data separated by a partition boundary, wherein the region of support is not the entire one or more blocks of the video data, wherein the instructions, when executed, cause the one or more processors to, when determining the adaptation metric, determine the adaptation metric based on a difference between a first predicted pixel value for the at least one pixel in the region of support and a second predicted pixel value for the at least one pixel in the region of support, wherein the one or more blocks of the video data are each associated with a block size, wherein to determine the adaptation metric, the one or more processors are configured to determine the adaptation metric based on the at least one pixel and the block size of at least one of the one or more blocks of the video data;
• adapt, based on the adaptation metric, application of an overlapped block motion compensation process to determine filtered predicted pixel values near the partition boundary for a first predicted block representative of the first partition of the video block, wherein to adapt application of the overlapped block motion compensation process, the one or more processors adjust a filter strength of a filter applied to predicted pixel values near the partition boundary for the first predicted block representative of the first partition of the video block, wherein to adapt, based on the adaptation metric, application of the overlapped block motion compensation process, the one or more processors are further configured to selectively disable application of the overlapped block motion compensation process when the determined block size is less than a block size threshold, wherein the overlapped block motion compensation process comprises a fetching operation for fetching a line of pixels from the memory, and wherein the determined block size comprises one of a video block size or a transform block size identifying a size of a transform applied to the first partition of the block;
• and
• output video data decoded using the adapted overlapped block motion compensation process.