Inter prediction in geometric partitioning with an adaptive number of regions
A decoder includes circuitry configured to receive a bitstream, partition a current block via a geometric partitioning mode into three portions, determine a motion vector associated with a portion of the three portions, wherein determining further includes constructing a candidate list, and decode the current block using the determined motion vector.
1. A decoder, the decoder comprising circuitry configured to:
receive a bitstream, wherein the bitstream includes a current picture, the current picture including a current block of pixels with multiple geometric partition boundaries, at least a first geometric partition boundary partitioning the block into first and second non-rectangular regions, and a second partition boundary, non-parallel to and intersecting the at least a first geometric partition boundary;
partition the second non-rectangular region of the current block via a geometric partitioning mode to partition the current block into three portions;
determine a first predictor for use on a first side of the at least a first geometric partition boundary using a first motion vector selected from a first list of motion vector candidates;
determine a second predictor for use on a second side of the at least a first geometric partition boundary using a second motion vector selected from a second list of motion vector candidates; and
decode the current block using the first motion vector and the second motion vector, wherein decoding further comprises:
smoothing the first predictor and the second predictor across the at least a first geometric partition boundary; and
adding residual pixel values to the first predictor and the second predictor.
2. The decoder of claim 1 , wherein the current block further comprises a coding tree unit.
3. The decoder of claim 1 , further configured to determine that a merge mode is enabled for a first portion of the three portions.
4. The decoder of claim 3 , further configured to decode the first portion according to the merge mode.
5. The decoder of claim 1 , further configured to determine that a merge mode is disabled for a first portion of the three portions.
6. The decoder of claim 5 , further configured to decode the first portion as a function of a motion vector difference.
7. The decoder of claim 1 , further comprising:
an entropy decoder processor configured to receive the bitstream and decode the bitstream into quantized coefficients;
an inverse quantization and inverse transformation processor configured to process the quantized coefficients including performing an inverse discrete cosine transform;
a deblocking filter;
a frame buffer; and
an intra prediction processor.
8. A method, the method comprising:
receiving, by a decoder, a bitstream, wherein the bitstream includes a current picture, the current picture including a current block of pixels with multiple geometric partition boundaries, at least a first geometric partition boundary partitioning the block into first and second non-rectangular regions, and a second partition boundary, non-parallel to and intersecting the at least a first geometric partition boundary;
partitioning, by the decoder, the second non-rectangular region of the current block via a geometric partitioning mode to partition the current block into three portions;
determining, by the decoder, a first predictor for use on a first side of the at least a first geometric partition boundary using a first motion vector selected from a first list of motion vector candidates:
determining, by the decoder, a second predictor for use on a second side of the at least a first geometric partition boundary using a second motion vector selected from a second list of motion vector candidates; and
decoding, by the decoder, the current block using the first motion vector and the second motion vector, wherein decoding further comprises:
smoothing the first predictor and the second predictor across the at least a first geometric partition boundary; and
adding residual pixel values to the first predictor and the second predictor.
9. The method of claim 8 , wherein the current block further comprises a coding tree unit.
10. The method of claim 8 further comprising determining that a merge mode is enabled for a first portion of the three portions.
11. The method of claim 10 further comprising decoding the first portion according to the merge mode.
12. The method of claim 8 further comprising determining that a merge mode is disabled for a first portion of the three portions.
13. The method of claim 12 further comprising decoding the first portion as a function of a motion vector difference.
14. The method of claim 8 , wherein the decoder further comprises:
an entropy decoder processor configured to receive the bitstream and decode the bitstream into quantized coefficients;
an inverse quantization and inverse transformation processor configured to process the quantized coefficients including performing an inverse discrete cosine transform;
a deblocking filter;
a frame buffer; and
an intra prediction processor.