发明名称 |
Quantization matrix for still and moving picture coding |
摘要 |
<p>An encoder and a decoder for for still and moving picture are disclosed. The encoder has a memory for storing a default quantization matrix including a plurality of quantization elements having predetermined values. Also, a generator is provided for producing a particular quantization matrix after a number of frames. The particular quantization matrix is read in a predetermined zigzag pattern, and the reading is terminated at a selected position which is in the middle of the zigzag pattern. An end code is added after the read quantization elements of a former portion of the particular quantization matrix. The quantization elements in the default quantization matrix are read in the same zigzag pattern from a position immediately after the selected position, and producing a latter portion of the default quantization matrix. The former portion of the particular quantization matrix and the latter portion of the default quantization matrix are synthesized to form a synthesized quantization matrix. <IMAGE></p> |
申请公布号 |
EP1397006(B1) |
申请公布日期 |
2009.07.22 |
申请号 |
EP20030016667 |
申请日期 |
1998.02.05 |
申请人 |
PANASONIC CORPORATION |
发明人 |
SHEN, SHENG MEI;TAN, THIOW KENG |
分类号 |
H04N7/30;G06T9/00;H04N7/26;H04N7/50 |
主分类号 |
H04N7/30 |
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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