Quantization parameter signaling in video processing
AssigneeAlibaba Group Holding Limited
InventorsJie Chen, Ru-Ling Liao, Jiancong Luo, Yan Ye
Life of this patent
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Abstract
The present disclosure provides methods for processing video content. One exemplary method comprises: receiving a bitstream comprising coded video data; determining a first parameter of a coding block; determining, according to the first parameter, one or more second parameters associated with a delta quantization parameter (QP) value or a chroma QP offset value; and determining, according to the one or more second parameters, at least one of the delta QP value or the chroma QP offset value.
Claims18
A computer-implemented method comprising:
- receiving a bitstream comprising coded video data;
- determining a first parameter of a coding block;
- determining, according to the first parameter, one or more second parameters associated with a delta quantization parameter (QP) value or a chroma QP offset value;
- and
- determining, according to the one or more second parameters, at least one of the delta QP value or the chroma QP offset value,
- wherein a maximum value of the first parameter is determined based on:
- a size of a luma coding tree block of a coding tree unit;
- a minimum size of luma samples in a luma leaf block resulting from quadtree splitting of the coding tree unit in an intra slice or an inter slice;
- and
- a maximum hierarchy depth of coding units resulting from multi-type tree splitting of a quadtree leaf in the intra slice or the inter slice.
A system for processing video content, comprising:
- a memory storing a set of instructions;
- and
- at least one processor configured to execute the set of instructions to cause the system to perform:
- receiving a bitstream comprising coded video data;
- determining a first parameter of a coding block;
- determining a maximum value of the first parameter based on:
- a size of a luma coding tree block of a coding tree unit associated with one of an intra-prediction slice or an inter-prediction slice,
- a minimum size of luma samples in a luma leaf block resulting from quadtree splitting of the coding tree unit, and
- a maximum hierarchy depth of coding units resulting from multi-type tree splitting of a quadtree leaf in the intra-prediction slice or the inter-prediction slice;
- determining, according to the first parameter, one or more second parameters associated with a delta quantization parameter (QP) value or a chroma QP offset value;
- and
- determining, according to the one or more second parameters, at least one of the delta QP value or the chroma QP offset value.
A non-transitory computer readable medium storing instructions that are executable by at least one processor of a computer system, wherein the execution of the instructions causes the computer system to perform a method comprising:
- receiving a bitstream comprising coded video data;
- determining a first parameter of a coding block;
- determining a maximum value of the first parameter based on:
- a size of a luma coding tree block of a coding tree unit associated with one of an intra-prediction slice or an interprediction slice,
- a minimum size of luma samples in a luma leaf block resulting from quadtree splitting of the coding tree unit, and
- a maximum hierarchy depth of coding units resulting from multi-type tree splitting of a quadtree leaf in the intra-prediction slice or the inter-prediction slice;
- determining, according to the first parameter, one or more second parameters associated with a delta quantization parameter (QP) value or a chroma QP offset value;
- and
- determining, according to the one or more second parameters, at least one of the delta QP value or the chroma QP offset value.
Dependencies are inferred from the claim text.