发明名称 |
METHOD AND APPARATUS FOR NON-UNIFORM MAPPING FOR QUANTIZATION MATRIX COEFFICIENTS BETWEEN DIFFERENT SIZES OF QUANTIZATION MATRICES IN IMAGE/VIDEO CODING |
摘要 |
A method for non-uniform mapping for quantization matrix coefficients between different sizes of quantization matrices in image/video coding includes obtaining a first quantization matrix and identifying a second quantization matrix to be formed therefrom. The second quantization matrix is a factor of two larger than the first quantization matrix. The second quantization matrix is populated with values from the first matrix through non-uniform mapping of the first quantization matrix. Non-uniform mapping to populate the second quantization matrix includes directly mapping values of all or a portion of the first quantization matrix into a most upper left portion of the second quantization matrix and mapping up-sampling values of the first quantization matrix into a remaining portion of the second quantization matrix. A frequency position pattern may be applied to the first quantization matrix to directly map only those values within the frequency position pattern into a most upper left portion of the second quantization matrix. |
申请公布号 |
US2016088302(A1) |
申请公布日期 |
2016.03.24 |
申请号 |
US201514860299 |
申请日期 |
2015.09.21 |
申请人 |
Futurewei Technologies, Inc. |
发明人 |
Zheng Jianhua;Zhang Chen-Xiong |
分类号 |
H04N19/124 |
主分类号 |
H04N19/124 |
代理机构 |
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代理人 |
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主权项 |
1. A method for non-uniform mapping for quantization matrix coefficients between different sizes of quantization matrices in image/video coding, the method comprising:
obtaining a first quantization matrix; identifying a second quantization matrix to be formed from the first quantization matrix, the second quantization matrix being a factor of two larger than the first quantization matrix; and populating the second quantization matrix with values from the first quantization matrix through non-uniform mapping of the first quantization matrix. |
地址 |
Plano TX US |