发明名称 |
Predictive coding device |
摘要 |
A predictive coding device includes: a limiter to limit an input value having a first dynamic range to a value within a second dynamic range narrower than the first dynamic range; a subtracter to calculate a differential value between an output value of the limiter and a predictive value; a quantization circuit to assign the same code to differential values which differ by a value which is equal to or larger than the second dynamic range and smaller than the first dynamic range; and a predictor to calculate a new predictive value by using an output of the quantization circuit. The quality of the code due to the limitation of the dynamic range is improved.
|
申请公布号 |
US4979187(A) |
申请公布日期 |
1990.12.18 |
申请号 |
US19890332040 |
申请日期 |
1989.04.03 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
AOKI, AKIO;ISHII, YOSHIKI |
分类号 |
H04N1/417;H03M3/04;H03M7/36 |
主分类号 |
H04N1/417 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|