Method for local illumination compensation
AssigneesBeijing Bytedance Network Technology Co., Ltd., Bytedance Inc.
InventorsHongbin Liu, Li Zhang, Kai Zhang, Jizheng Xu, Yue Wang
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Abstract
A method for processing a video includes determining, for a first video unit, a set of local illumination compensation (LIC) parameters including a scaling factor and an offset factor; performing or skipping a pre-process on at least one parameter of the set of LIC parameters; and updating at least one history based local illumination compensation parameter table (HLICT) using at least one parameter of the set of LIC parameters, the at least one HLICT being used for a conversion of subsequent video units.
Claims20
A method of processing video data, comprising:
- determining, for a first video block, a set of local illumination compensation (LIC) parameters including a scaling factor and an offset factor;
- and
- updating at least one history based local illumination compensation parameter table (HLICT) using at least one parameter of the set of LIC parameters, wherein the at least one HLICT is used for a conversion of subsequent video blocks of the first video block, and
- wherein the at least one parameter of the set of LIC parameters is quantized before being signaled and a quantization step is signaled in at least one of a picture parameter set (PPS), a sequence parameter set (SPS), a video parameter set (VPS), a slice header, a tile group header and a tile header.
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 first video block, a set of local illumination compensation (LIC) parameters including a scaling factor and an offset factor;
- and
- update at least one history based local illumination compensation parameter table (HLICT) using at least one parameter of the set of LIC parameters, wherein the at least one HLICT is used for a conversion of subsequent video blocks of the first video block, and
- wherein the at least one parameter of the set of LIC parameters is quantized before being signaled and a quantization step is signaled in at least one of a picture parameter set (PPS), a sequence parameter set (SPS), a video parameter set (VPS), a slice header, a tile group header and a tile header.
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 first video block, a set of local illumination compensation (LIC) parameters including a scaling factor and an offset factor;
- updating at least one history based local illumination compensation parameter table (HLICT) using at least one parameter of the set of LIC parameters, wherein the at least one HLICT is used for a conversion of subsequent video blocks of the first video block;
- and
- generating the bitstream based on the at least one HLICT, and
- wherein the at least one parameter of the set of LIC parameters is quantized before being signaled and a quantization step is signaled in at least one of a picture parameter set (PPS), a sequence parameter set (SPS), a video parameter set (VPS), a slice header, a tile group header and a tile header.
Dependencies are inferred from the claim text.