发明名称 |
Image encoding method, device thereof, and control program thereof |
摘要 |
A block dead zone scale generator (202) receives an image signal and a prediction error, analyzes the pattern or prediction performance of a target block, and outputs a dead zone scale suitable for the pattern or prediction performance of the block. A dead zone generator (201) receives a dead zone scale from the block dead zone scale generator (202) and an MB quantization parameter from a quantization control device (103), calculates a dead zone width from the zone scale and the MB quantization parameter, and outputs the dead zone width. A quantization device (102) quantizes an orthogonal transformation coefficient supplied from an orthogonal transformation device (101) by using a dead zone from the dead zone generator (201), and outputs a quantized transformation coefficient. This makes it possible to realize quantization with arbitrary strength for each transformation coefficient and for each block comprising a plurality of transformation coefficients as constituent elements, thereby providing a high-quality image encoding technology. |
申请公布号 |
EP2290986(A1) |
申请公布日期 |
2011.03.02 |
申请号 |
EP20100191897 |
申请日期 |
2005.02.15 |
申请人 |
NEC CORPORATION |
发明人 |
CHONO, KEIICHI;SENDA, YUZO |
分类号 |
H04N19/124;H04N19/136;H04N19/137;H04N19/14;H04N19/157;H04N19/159;H04N19/176;H04N19/196;H04N19/60 |
主分类号 |
H04N19/124 |
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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