Method for equalizing a VSB high definition television...

Details Method for equalizing a VSB high definition television... Method for equalizing a VSB high definition television...

2005-05-17

2005-05-17

Hsia, Sherrie (Department: 2614)

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

C348S624000, C348S607000

Reexamination Certificate

active

06894728

ABSTRACT:
A method and apparatus for equalizing a signal containing high definition television information in the presence of co-channel NTSC interference employs an equalizer having feed forward and decision feedback filters. A comb filter is inserted ahead of the equalizer when NTSC co-channel interference is present. A selected tap of the decision feedback filter is set to a zero value when the signal is being equalized during an intitial blind operating mode. The decision feedback filter taps are updated afterwards, in a decision-directed operating mode.

REFERENCES:
patent: 5648822 (1997-07-01), Hulyalkar
patent: 5654765 (1997-08-01), Kim
patent: 6122015 (2000-09-01), Al-Dhahir et al.
patent: 6680971 (2004-01-01), Tazebay et al.
patent: WO9967946 (1999-12-01), None
Monisha Ghosh, entitled “Blind Decision Feedback Equalization for Terrestrial Television Receivers,” pp. 2070-2081, Proceedings of the IEEE, vol. 86, No. 10, Oct. 1998.
EPO Search Report.

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