发明名称 |
Analog-to-digital converter as for an adaptive television deghosting system |
摘要 |
A digital television signal deghosting system includes an IIR filter responsive to the in-phase and quadrature-phase components of modulated television signals for cancelling ghost signals irrespective of their phase. A double-conversion tuner develops modulated composite video signals having a 3fc carrier frequency. An analog-to-digital converter responsive to a two-phase 3fc clock signal develops digital samples which alternately represent the baseband in-phase and quadrature-phase components of the modulated video signals. These samples are separated to develop digital signals representing the in-phase and quadrature-phase components of the modulated television signals.
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申请公布号 |
US4686570(A) |
申请公布日期 |
1987.08.11 |
申请号 |
US19850813255 |
申请日期 |
1985.12.24 |
申请人 |
RCA CORPORATION |
发明人 |
LEWIS, JR., HENRY G.;NG, SHEAU-BAO |
分类号 |
H04N5/21;(IPC1-7):H04N5/40 |
主分类号 |
H04N5/21 |
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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