发明名称 |
Adaptive amplitude averaging for weighting quantizing noise |
摘要 |
An apparatus reduces quantizing noise by averaging picture information when only low frequency information is present. Thus, high frequency detail is not lost. This is determined by looking at proximate samples to see if their amplitudes are within a selected amount of each other. The averaging typically is of two or four picture samples depending upon how great an area has only low frequencies, but greater numbers of samples can be used.
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申请公布号 |
US4334237(A) |
申请公布日期 |
1982.06.08 |
申请号 |
US19800149998 |
申请日期 |
1980.05.15 |
申请人 |
RCA CORPORATION |
发明人 |
REITMEIER, GLENN A.;DISCHERT, ROBERT A. |
分类号 |
H04N7/12;H03M1/08;H03M1/20;H04B14/04;H04N7/26;H04N11/04;(IPC1-7):H04N5/21 |
主分类号 |
H04N7/12 |
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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