Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1993-04-16
1994-11-08
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
H04N 538
Patent
active
053631447
ABSTRACT:
The present invention relates to a television ghost canceling device applied with a ternary sequence ghost cancellation reference signal, which comprises: a ternary sequence generating section included in a transmitting section of television system and for generating a training signal inserted within a vertical flyback time period of video signal to be modulated in radio frequency; a demodulating section included in a receiving section of television system and for receiving a transmission signal of the transmitting section and for demodulating to an original video signal; a line selecting section for selecting a line inserted with a training signal of vertical flyback time periods of video signal demodulated at the demodulating section; a memory stored with a ternary sequence reference signal corresponding to a training signal generated at the ternary sequence generating section; a cross-correlating section for computing a cross-correlation of the reference signal and the training signal whereby finding out a ghost channel; and a ghost canceling filter for canceling the ghost of video signal in accordance with a filter coefficient value of the ghost channel.
REFERENCES:
patent: 4703357 (1987-10-01), Ng et al.
patent: 4980767 (1990-12-01), Chao et al.
patent: 5117291 (1992-05-01), Fadavi-Ardekani et al.
Goldstar Co. Ltd.
Kostak Victor R.
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