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US 2022/0103848 A1Published application
Image decoding method and device therefor
AssigneeLG Electronics Inc.
InventorsSeethal PALURI, Seunghwan KIM, Jie ZHAO
Life of this patent
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Abstract
An image decoding method performed by a decoding device, according to the present document, comprises the steps of: obtaining image information; and generating a reconstructed picture on the basis of the image information.
Claims14
An image decoding method, performed by a decoding apparatus, comprising:
- obtaining image information;
- and
- generating a reconstructed picture based on the image information,
- wherein the obtaining the image information process comprises:
- determining a chroma type related with the reconstructed picture;
- obtaining a flag representing whether quantization parameter data for combined chroma coding is present, based on the chroma type with a value other than 0;
- and
- obtaining the quantization parameter data for the combined chroma coding based on the flag,
- wherein the quantization parameter data includes a syntax element for a starting quantization parameter of a chroma quantization parameter table and a syntax element for a number of quantization parameters in the chroma quantization parameter table,
- wherein the chroma type with the value of 0 represents monochrome format and the chroma type with the value other than 0 represents a chroma format other than the monochrome.
7 more elements
An image encoding method, performed by an encoding apparatus, comprising:
- encoding image information;
- and
- generating a bitstream including the image information,
- wherein the encoding the image information process comprises:
- determining a chroma type related with a reconstructed picture;
- generating quantization parameter data for combined chroma coding based on the chroma type with a value other than 0;
- generating a flag representing whether the quantization parameter data for the combined chroma coding is present;
- and
- encoding the image information including the quantization parameter data and the flag,
- wherein the quantization parameter data includes a syntax element for a starting quantization parameter of a chroma quantization parameter table and a syntax element for a number of quantization parameters in the chroma quantization parameter table,
- wherein the chroma type with the value of 0 represents monochrome format and the chroma type with the value other than 0 represents a chroma format other than the monochrome.
8 more elements
A non-transitory computer-readable storage medium storing a bitstream generated by a method, the method comprising:
- encoding image information;
- and
- generating the bitstream including the image information,
- wherein the encoding the image information process comprises:
- determining a chroma type related with a reconstructed picture;
- generating quantization parameter data for combined chroma coding based on the chroma type with a value other than 0;
- generating a flag representing whether the quantization parameter data for the combined chroma coding is present;
- and
- encoding the image information including the quantization parameter data and the flag,
- wherein the quantization parameter data includes a syntax element for a starting quantization parameter of a chroma quantization parameter table and a syntax element for a number of quantization parameters in the chroma quantization parameter table,
- wherein the chroma type with the value of 0 represents monochrome format and the chroma type with the value other than 0 represents a chroma format other than the monochrome.
8 more elements
Dependencies are inferred from the claim text.