发明名称 |
Method of orthogonal transform coding/decoding. |
摘要 |
There is provided the method of orthogonal transform coding/decoding to quantize/de-quantize transformed coefficients which are divided into a plurality of bands to which respective different numbers of coefficient are allotted. Quantization/de-quantization tables are arranged on the basis of a probability density function of the coefficient values designed on the assumption of a specified number of coefficients so as to correspond to the number of quantization/de-quantization bits. The values in the quantization/de-quantization tables selected according to the number of quantization/de-quantization bits are adaptivety compensated on the basis of an actual number of coefficients on each band to quantize/de-quantize the coefficient values. <IMAGE> |
申请公布号 |
EP0444884(B1) |
申请公布日期 |
1994.12.07 |
申请号 |
EP19910301552 |
申请日期 |
1991.02.26 |
申请人 |
VICTOR COMPANY OF JAPAN, LTD. |
发明人 |
FUCHIGAMI, NORIHIKO;KONISHI, MASAYA;YAMADA, YASUHIRO |
分类号 |
G10L11/00;G06F17/14;H03M1/00;H03M7/30 |
主分类号 |
G10L11/00 |
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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