Image or video coding based on palette mode
AssigneeLG Electronics Inc.
InventorsJie ZHAO, Seethal PALURI, Seunghwan KIM
Life of this patent
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Abstract
According to the disclosure of the present documents, a quantization parameter used in a scaling process of a quantized escape value in a palette mode may be derived on the basis of minimum quantization parameter information relating to a transform skip mode. Accordingly, the amount of data required to be signaled for video/image coding can be reduced and escape coding in a palette mode can be effectively performed.
Claims15
An image decoding method performed by a decoding apparatus, the method comprising:
- obtaining image information including quantized escape value information in a palette mode from a bitstream;
- deriving an escape value for a current block based on the quantized escape value information;
- and
- generating reconstructed samples based on the escape value,
- wherein the escape value is derived based on the quantized escape value information and a quantization parameter,
- wherein the quantization parameter is derived based on information on a minimum quantization parameter for a transform skip mode.
An image encoding method performed by an encoding apparatus, the method comprising:
- deriving an escape value in a palette mode for a current block;
- deriving a quantized escape value based on the escape value;
- and
- encoding image information including the quantized escape value information,
- wherein the quantized escape value is derived based on a quantization parameter for the escape value in the current block,
- wherein the quantization parameter is derived based on information on a minimum quantization parameter for a transform skip mode.
A non-transitory computer-readable storage medium storing a bitstream generated by a method, the method comprising:
- performing deriving an escape value in a palette mode for a current block, deriving a quantized escape value based on the escape value, and generating the bitstream by encoding image information including the quantized escape value information,
- wherein the quantized escape value is derived based on a quantization parameter for the escape value in the current block,
- wherein the quantization parameter is derived based on information on a minimum quantization parameter for a transform skip mode.
Dependencies are inferred from the claim text.