发明名称 |
METHOD AND SYSTEM FOR CONTEXT-BASED ADAPTIVE BINARY ARITHMETIC CODING |
摘要 |
<p>A method of image coding wherein an image is divided into blocks having a plurality of pixels. A transform coding operation is performed on a block of pixels to produce a corresponding block of transform coefficient values, which is scanned to produce a scanned array of coefficient values represented by a plurality of number pairs having a first and a second number. The first and second numbers are assigned to one of a plurality of contexts (14) representative of the number pairs. The first number of a number pair is assigned to a context based on a first number of another number pair. Alternatively, the second number of a number pair is assigned to a context based on the first number of the number pair (16). Furthermore, a number indicative of the number of non-zero coefficient values in the block of transform coefficient values is determined and assigned to a context.</p> |
申请公布号 |
WO03027940(A1) |
申请公布日期 |
2003.04.03 |
申请号 |
WO2002IB03745 |
申请日期 |
2002.09.12 |
申请人 |
NOKIA CORPORATION;NOKIA INC. |
发明人 |
KARCZEWICZ, MARTA;KURCEREN, RAGIP |
分类号 |
H04N7/26;G06T9/00;H03M7/40;H04N1/413;H04N7/50;(IPC1-7):G06K9/00;G06K9/38;G06K9/36;G06K9/46 |
主分类号 |
H04N7/26 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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