METHOD AND APPARATUS FOR ENCODING A BLOCK AND DECODING BASED ON ILLUMINATION COMPENSATION

1 - 14 . (canceled)

15 . A method for encoding a block of a video, the block having an edge and comprising a sub-block having an edge in common with the edge of the block, the method comprising:

deriving one or more illumination compensation parameters based on samples neighboring the sub-block and samples neighboring a motion-compensated reference sub-block of the sub-block, wherein the samples neighboring the sub-block are samples inside the block;

deriving a prediction sub-block by applying on the motion-compensated reference sub-block an illumination compensation using the one or more derived illumination compensation parameters; and

encoding the sub-block using the prediction sub-block.

16 . A method for decoding a block of a video, the block having an edge and comprising a sub-block having an edge in common with the edge of the block, the method comprising:

deriving one or more illumination compensation parameters based on samples neighboring the sub-block and samples neighboring a motion-compensated reference sub-block of the current sub-block, wherein the samples neighboring the sub-block are samples inside the block;

deriving a prediction sub-block by applying on the motion-compensated reference sub-block an illumination compensation using the one or more derived illumination compensation parameters; and

decoding the sub-block using the prediction sub-block.

17 . An apparatus for encoding a block of a video, the block having an edge and comprising a sub-block having an edge in common with the edge of the block, the apparatus comprising one or more processors configured for:

deriving one or more illumination compensation parameters based on samples neighboring the sub-block and samples neighboring a motion-compensated reference sub-block of the sub-block, wherein the samples neighboring the sub-block are samples inside the block;

deriving a prediction sub-block by applying on the motion-compensated reference sub-block an illumination compensation using the one or more derived illumination compensation parameters; and

encoding the sub-block using the prediction sub-block.

18 . An apparatus for decoding a block of a video, the block having an edge and comprising a sub-block having an edge in common with the edge of the block, the apparatus comprising one or more processors configured for:

deriving one or more illumination compensation parameters based on samples neighboring the sub-block and samples neighboring a motion-compensated reference sub-block of the sub-block, wherein the samples neighboring the sub-block are samples inside the block;

deriving a prediction sub-block by applying on the motion-compensated reference sub-block an illumination compensation using the one or more derived illumination compensation parameters; and

decoding the sub-block using the prediction sub-block.

19 . The method of claim 15 , further comprising:

encoding a plurality of other sub-blocks of the block using, for each sub-block of the plurality of other sub-blocks, a corresponding prediction sub-block derived by applying to a respective motion-compensated reference sub-block an illumination compensation using one or more derived illumination compensation parameters and applying a separate transform to each residual obtained for each sub-block of the block.

20 . The method of claim 15 , further comprising:

encoding a plurality of other sub-blocks of the block using, for each sub-block of the plurality of other sub-blocks, a corresponding prediction sub-block derived by applying to a respective motion-compensated reference sub-block an illumination compensation using one or more derived illumination compensation parameters and applying a single transform to a residual block formed from each residual obtained for each sub-block of the block.

21 . The method of claim 15 , wherein the one or more illumination compensation parameters are derived from neighboring samples inside a sub-set of sub-blocks of the block.

22 . A non-transitory computer readable storage medium having stored thereon instructions for implementing the method of claim 15 when executed by one or more processors.

23 . A non-transitory computer readable medium comprising a bitstream generated according to the method of claim 15 .

24 . The method of claim 16 , further comprising:

decoding a plurality of other sub-blocks of the block using, for each sub-block of the plurality of other sub-blocks, a corresponding prediction sub-block derived by applying to a respective motion-compensated reference sub-block an illumination compensation using one or more derived illumination compensation parameters and applying a separate transform to each residual obtained for each sub-block of the block.

25 . The method of claim 16 , further comprising:

decoding a plurality of other sub-blocks of the block using, for each sub-block of the plurality of other sub-blocks, a corresponding prediction sub-block derived by applying to a respective motion-compensated reference sub-block an illumination compensation using one or more derived illumination compensation parameters and applying a single transform to a residual block formed from each residual obtained for each sub-block of the block.

26 . The method of claim 16 , wherein the one or more illumination compensation parameters are derived from neighboring samples inside a sub-set of sub-blocks of the block.

27 . The apparatus of claim 17 , the one or more processors further configured for:

encoding a plurality of other sub-blocks of the block using, for each sub-block of the plurality of other sub-blocks, a corresponding prediction sub-block derived by applying to a respective motion-compensated reference sub-block an illumination compensation using one or more derived illumination compensation parameters and applying a separate transform to each residual obtained for the plurality of other sub-blocks.

28 . The apparatus of claim 17 , the one or more processors further configured for:

encoding a plurality of other sub-blocks of the block using, for each sub-block of the plurality of other sub-blocks, a corresponding prediction sub-block derived by applying to a respective motion-compensated reference sub-block an illumination compensation using one or more derived illumination compensation parameters and applying a single transform to each residual obtained for the plurality of other sub-blocks.

29 . The apparatus of claim 17 , wherein the one or more illumination compensation parameters are derived from neighboring samples inside a sub-set of sub-blocks of the block.

30 . The apparatus of claim 18 , the one or more processors further configured for:

decoding a plurality of other sub-blocks of the block using, for each sub-block of the plurality of other sub-blocks, a corresponding prediction sub-block derived by applying to a respective motion-compensated reference sub-block an illumination compensation using one or more derived illumination compensation parameters and applying a separate transform to each residual obtained for the plurality of other sub-blocks.

31 . The apparatus of claim 18 , the one or more processors further configured for:

decoding a plurality of other sub-blocks of the block using, for each sub-block of the plurality of other sub-blocks, a corresponding prediction sub-block derived by applying to a respective motion-compensated reference sub-block an illumination compensation using one or more derived illumination compensation parameters and applying a single transform to each residual obtained for the plurality of other sub-blocks.

32 . The apparatus of claim 18 , wherein the one or more illumination compensation parameters are derived from neighboring samples inside a sub-set of sub-blocks of the block.

33 . A non-transitory computer readable storage medium having stored thereon instructions for implementing the method of claim 16 when executed by one or more processors.

34 . A non-transitory computer readable medium comprising a bitstream generated according to the apparatus of claim 17 .