发明名称 |
Encoder including an embedded coder for performing bit-significance encoding |
摘要 |
The invention includes generating transformed signals in response to input data using a reversible wavelet transform 102. The resulting coefficients are subjected to bit significance embedded (prioritised) coding 103 and then entropy coding 104. In one embodiment, the input data is decomposed using a non-minimal length reversible filter. The decomposition may be performed using multiple one-dimension filters. The embedded coding 103 involves frequency-based modelling ("zerotree" coding) or joint spatial/frequency modelling ("horizon" encoding). <IMAGE> |
申请公布号 |
GB2293733(B) |
申请公布日期 |
1997.10.22 |
申请号 |
GB19950018298 |
申请日期 |
1995.09.07 |
申请人 |
* RICOH COMPANY LIMITED |
发明人 |
AHMAD * ZANDI;JAMES D * ALLEN;EDWARD L * SCHWARTZ;MARTIN * BOLIEK |
分类号 |
G06F17/00;G06F17/14;G06T9/00;H03G7/00;H03M7/30;H04N7/24;H04N7/26;H04N7/30;(IPC1-7):H03M7/30;H03H17/02;H04N7/50;H04N1/41 |
主分类号 |
G06F17/00 |
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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