Patent ID: 9521430
Filing Date: 2016-12-13
CPC Classification: H04N

Claim Text:
1. A method of determining a context model for entropy decoding, the method comprising: determining a current transform unit based on size information of a transform unit, wherein the size information is obtained from a bitstream; when the current transform unit is a transform unit of a chroma component, determining a context set of a current sub-block in the current transform unit independently of a position of the current sub-block; when the current transform unit is a transform unit of a luminance component, determining the context set of the current sub-block in the current transform unit based on the position of current sub-block; determining a context model for obtaining first threshold value information based on the context set of the current sub-block; and determining a context model for obtaining second threshold value information based on the context set of the current sub-block, wherein the first threshold value information indicates whether a current transformation coefficient in the current sub-block is greater than a first threshold value, and the second threshold value information indicates whether a current transformation coefficient in the current sub-block is greater than a second threshold value.