发明名称 |
DEVICE FOR STORING OR TRANSMITTING TRANSFORM-CODED PICTURE SIGNALS AND FOR REGAINING THOSE PICTURE SIGNALS |
摘要 |
<p>In the conventional transformation coding of pictures the value ranges of the coefficients then produced are extended during the performance of the individual arithmetical steps. As a result thereof these coefficients have a great redundancy. According to the invention, the arithmetical steps which are formed by the basic transformation of two values are performed so that as a result of each arithmetical step only the original word length is obtained, because in each arithmetical step a portion of the value range of the result is mapped onto a different area. An example for the technical implementation of such a mapping on modified coefficients and the retransformation of these modified coefficients is described.</p> |
申请公布号 |
EP0077089(B1) |
申请公布日期 |
1988.09.07 |
申请号 |
EP19820201199 |
申请日期 |
1982.09.24 |
申请人 |
PHILIPS PATENTVERWALTUNG GMBH;N.V. PHILIPS' GLOEILAMPENFABRIEKEN |
发明人 |
MEYER-EBRECHT, DIETRICH, DR.;CHRISTIANSEN, JENS |
分类号 |
H04N1/41;H04N1/415;H04N19/60;(IPC1-7):H04N7/13 |
主分类号 |
H04N1/41 |
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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