Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1995-01-18
1996-02-13
Groody, James J.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348614, 375233, H04N 521
Patent
active
054915180
ABSTRACT:
An improved equalization apparatus includes updating circuit for generating, in response to the received television signal and the error signal, a set of updated filter coefficients as the set of the filter coefficients for the equalizer filter, which comprises: a shift register for storing and shifting a data sample to provide a set of the data samples; a multiplier for multiplying a error signal with the set of the data samples to provide a set of error weighted data samples; a scaling circuit, in response to a blind mode signal, for scaling down the set of error weighted data samples with a first scale value in order to generate a first set of scaled error weighted data samples and, in response to a decision mode signal, for scaling down the set of error weighted data samples with a second scale value to generate a second set of scaled error weighted data samples; an adder for adding the first or the second set of scaled error weighted data samples to a set of previous filter coefficients in order to produce a set of updated filter coefficients as an output of the updating circuit; and a FIFO buffer for storing the set of updated filter coefficients as the set of previous filter coefficients for the adder.
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Y. S. Choi et al., "Adaptive Blind Equalization Coupled with Carrier Recovery for HDTV Modem", IEEE Transactions on Consumer Electronics, vol. 39, No. 3, pp. 386-391 (Aug., 1993).
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Daewoo Electronics Co. Ltd.
Groody James J.
Murrell Jeffrey S.
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