发明名称 |
DIGITAL SIGNAL PROCESSING METHOD AND APPARATUS |
摘要 |
Encoded digital television signals having a defined bandwidth are transmitted at reduced bandwidth by regularly omitting (18) one in every n of the signal samples, where n is greater than two and is preferably three or four. At a receiver the omitted samples are regenerated by estimating (26) their values from the samples of the reduced-rate transmitted signal by making use of frequency components outside the normal defined bandwidth of the original signal. The estimation can be achieved by a symmetrical digital transversal filter of which one in every n coefficients is zero, the amplitude/frequency characteristics of the filter being unity throughout the defined bandwidth of the TV signal and antisymmetric about half the mean lower sample rate. |
申请公布号 |
GB2039195(A) |
申请公布日期 |
1980.07.30 |
申请号 |
GB19790043755 |
申请日期 |
1979.12.19 |
申请人 |
BNRITISH BROADCASTING CORP |
发明人 |
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分类号 |
H04B1/66;H04N7/46;H04N11/04;(IPC1-7):04B1/66;04N1/41 |
主分类号 |
H04B1/66 |
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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