发明名称 |
NTSC CO-CHANNEL INTERFERENCE DETECTORS RESPONSIVE TO RECEIVED Q-CHANNEL SIGNALS IN DIGITAL TV SIGNAL RECEIVERS |
摘要 |
An NTSC co-channel interference detector detects the presence of an interfering NTSC signal in the received Q-channel signal that is orthogonal to the received I-channel signal, rather than detecting the presence of an interfering NTSC signal in the received T-channel signal. By determining whether or not a significant amoun t of NTSC co-channel interference accompanies the received Q-channel signal, it is inferentially determined whether or not a significant amount of NTSC co- channel interference accompanies the received I-channel signal, such as to cause too many errors in the trellis decoding of equalized received I-channel signal to be corrected by the Reed-Solomon decoder following the trellis decoder. The accurate determination of co-channel NTSC interference levels is simplified, because essentially no direct bias arises from the quadrature-phase synchronous detection of the pilot carrier of the VSB AM digital television signal.
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申请公布号 |
CA2267679(C) |
申请公布日期 |
2005.02.08 |
申请号 |
CA19972267679 |
申请日期 |
1997.10.02 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
LIMBERG, ALLEN LEROY |
分类号 |
H04N7/04;H04L1/00;H04N5/21;H04N5/44;H04N5/455;(IPC1-7):H04N5/44;H04N7/64 |
主分类号 |
H04N7/04 |
代理机构 |
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