发明名称 |
System for ghost cancellation comprising an improved GCR signal sequence |
摘要 |
A system for improved ghost cancellation for use in particular in television receivers. The system featuring a superior ghost cancellation reference (GCR) signal which exhibits improved performance in noisy environments and which exhibits the flat and wide bandwidth necessary for effective channel characterization which also exhibiting a higher and more evenly distributed amplitude versus time characteristic than that provided by known, non-cyclic ghost cancellation signals. The GCR signal is encoded a selected television line of an eight field sequence of lines however the polarity of the GCR signal is reversed selectively from field to field prior to inserting it in respective television lines. At a decoder or television receiver incorporating the invention, the selected television lines are combined in a manner which provides for both a robust received GCR value and cancellation of the effects of pair-wise constant television line signals on the GCR signals.
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申请公布号 |
US5283650(A) |
申请公布日期 |
1994.02.01 |
申请号 |
US19920941356 |
申请日期 |
1992.09.04 |
申请人 |
NORTH AMERICAN PHILIPS CORPORATION |
发明人 |
KOO, DAVID;GREENBERG, CRAIG B.;SATO, TAKASHI |
分类号 |
H04L25/02;H04N5/21;(IPC1-7):H04N7/08;H04N5/14;H04N5/208;H04N5/213 |
主分类号 |
H04L25/02 |
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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