Signaling for reference picture resampling
AssigneesBeijing Bytedance Network Technology Co., Ltd., Bytedance Inc.
InventorsKai Zhang, Li Zhang, Hongbin Liu, Zhipin Deng, Jizheng Xu, Yue Wang
Life of this patent
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Abstract
A method of video processing includes determining, for a conversion between a current block of a video and a coded representation of the video, that a resolution of a current picture containing the current block and a reference picture used for the conversion are different, and performing the conversion based on the determining such that predicted values of a group of samples of the current block are generated using a horizontal or a vertical interpolation filter.
Claims21
A method of processing video data, comprising:
- determining, for a conversion between a current block of a current picture of a video and a bitstream of the video, usage of a wraparound clipping operation that is applied to a reference picture for determining a prediction block for the current block based on at least one syntax element;
- performing the conversion based on the determining;
- wherein the wraparound clipping operation is used to reselect samples in the reference picture in case that samples are outside the reference picture, and
- wherein the at least one syntax element includes a first syntax element included in a picture parameter set (PPS), wherein the first syntax element indicates whether the wraparound clipping operation is enabled in a horizontal direction for the current block, and wherein a value of the first syntax element depends on a first size associated with a coding tree block of the current block and a second size associated with a width of the current picture comprising the current block.
An apparatus for processing video data comprising a processor and a non-transitory memory with instructions thereon, wherein the instructions upon execution by the processor, cause the processor to:
- determine, for a conversion between a current block of a current picture of a video and a bitstream of the video, usage of a wraparound clipping operation that is applied to a reference picture for determining a prediction block for the current block based on at least one syntax element;
- perform the conversion based on the determination;
- wherein the wraparound clipping operation is used to reselect samples in the reference picture in case that samples are outside the reference picture, and
- wherein the at least one syntax element includes a first syntax element included in a picture parameter set (PPS), wherein the first syntax element indicates whether the wraparound clipping operation is enabled in a horizontal direction for the current block, and wherein a value of the first syntax element depends on a first size associated with a coding tree block of the current block and a second size associated with a width of the current picture comprising the current block.
A non-transitory computer-readable storage medium storing instructions that cause a processor to:
- determine, for a conversion between a current block of a current picture of a video and a bitstream of the video, usage of a wraparound clipping operation that is applied to a reference picture for determining a prediction block for the current block based on at least one syntax element;
- perform the conversion based on the determination;
- wherein the wraparound clipping operation is used to reselect samples in the reference picture in case that samples are outside the reference picture, and
- wherein the at least one syntax element includes a first syntax element included in a picture parameter set (PPS), wherein the first syntax element indicates whether the wraparound clipping operation is enabled in a horizontal direction for the current block, and wherein a value of the first syntax element depends on a first size associated with a coding tree block of the current block and a second size associated with a width of the current picture comprising the current block.
A non-transitory computer-readable recording medium storing a bitstream of a video which is generated by a method performed by a video processing apparatus, wherein the method comprises:
- determining, for a current block of a current picture of the video, usage of a wraparound clipping operation that is applied to a reference picture for determining a prediction block for the current block based on at least one syntax element;
- generating the bitstream based on the determining;
- wherein the wraparound clipping operation is used to reselect samples in the reference picture in case that samples are outside the reference picture, and
- wherein the at least one syntax element includes a first syntax element included in a picture parameter set (PPS), wherein the first syntax element indicates whether the wraparound clipping operation is enabled in a horizontal direction for the current block, and wherein a value of the first syntax element depends on a first size associated with a coding tree block of the current block and a second size associated with a width of the current picture comprising the current block.
Dependencies are inferred from the claim text.