Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1995-12-21
1998-04-28
Peng, John K.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348 21, 348611, 348726, H04N 521, H04N 5455
Patent
active
057451877
ABSTRACT:
A television receiver for reducing a co-channel interference in a digital television signal transmitted by a transmitter, wherein the digital television signal includes an encoded digital television signal component, a co-channel interference component, and a noise component, and wherein a precoder, for which precoding is implemented at the television transmitter, encodes the digital television signal. The receiver includes a receiver for receiving the transmitted digital television signal and for providing a received output signal. A filter block is provided for filtering the received output signal to reduce the co-channel interference component thereof. The filter block includes a plurality of rejection filters and a device for enabling a desired one of the plurality of rejection filters in response to a selection control signal, the enabled rejection filter corresponding to an optimal rejection filter for the precoder for which precoding is implemented at the television transmitter. The filter block provides a filtered output signal. A detector, responsive to the received output signal, is provided for detecting information regarding the precoder. The detector includes a selector for selecting the desired one of the plurality of rejection filters in response to the detected information, and provides the selection control signal for the filter block. Lastly, a device, responsive to the filtered output signal, produces a decoded digital television signal.
REFERENCES:
patent: 5282023 (1994-01-01), Scarpa
patent: 5325188 (1994-06-01), Scarpa
patent: 5475444 (1995-12-01), Kim
patent: 5602602 (1997-02-01), Hulyalkar
Saifuddin et al, Cascaded Combination of Cancelling Co-Channel Interference and Decoding of Error-Correcting Codes for CDMA, IEEE third International Symposium on Spread Spectrum Techniques and Applications (ISSSTA), pp. 171-175, Jul. 4, 1994.
Zenith Electronics Corporation, "VSB Transmission System", Zenith Research and Development, pp. 2-18, and figs. 1-26, Dec. 17, 1993.
Cugnini Aldo G.
Ghosh Monisha
Hulyalkar Samir N.
Goodman Edward W.
Murrell Jeffrey S.
Peng John K.
U.S. Philips Corporation
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