Method and system of transform block processing according to quantization matrix in video coding
AssigneeHfi Innovation Inc.
InventorsXimin Zhang, Shan Liu
Life of this patent
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Abstract
A method and system process transform blocks according to quantization matrices in a video coding system. The method includes obtaining an initial quantization matrix having a first width and a first height, obtaining a derived quantization matrix having a second width and a second height, wherein the second width is different from the second height, and the derived quantization matrix is derived from the initial quantization matrix, receiving a transform block having a block size, where the transform block is associated with a picture, and selecting the initial quantization matrix or the derived quantization matrix for processing transform coefficients of the transform block according to the block size.
Claims18
A method for processing transform blocks according to quantization matrices in a video coding system, the method comprising:
- obtaining an initial quantization matrix having a first width and a first height;
- obtaining a derived quantization matrix having a second width and a second height, wherein the second width is different from the second height, and the derived quantization matrix is derived from the initial quantization matrix;
- receiving a transform block having a block size, where the transform block is associated with a picture;
- and
- selecting the initial quantization matrix or the derived quantization matrix for processing transform coefficients of the transform block according to the block size.
A video coding system, wherein transform blocks are processed according to quantization matrices, the system comprising one or more circuits configured to:
- obtain an initial quantization matrix having a first width and a first height;
- obtain a derived quantization matrix having a second width and a second height, wherein the second width is different from the second height, and the derived quantization matrix is derived from the initial quantization matrix;
- receive a transform block having a block size, where the transform block is associated with a picture;
- and
- select the initial quantization matrix or the derived quantization matrix for processing transform coefficients of the transform block according to the block size.
Dependencies are inferred from the claim text.