Title: Apparatus for removing ghost signals from received video signals

Abstract: A feedback type ghost killer removes a ghost signal component from a detected composite video signal including a wanted video signal and the unwanted ghost signal. The delay time and relative amplitude of the ghost signal to the wanted video signal are detected by a detector with a plurality of tapped outputs. When an output signal appears on one of tapped outputs, the tap position represents the delay time and the amplitude of the output signal indicates the relative amplitude. The composite video signal and the output signals of the detector are supplied to a transversal filter to form a pseudo-ghost signal. The tapped outputs of the detector are used to weight the video signal in the transversal filter. The pseudo-ghost signal and the video signal are subtractively combined to remove the ghost signal from the video signal.

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Inventors: Iwasawa, Mineo (Kanagawa, JP)
Sakaue, Tatsuo (Yokohama, JP)
Date, Hikaru (Fukuoka, JP)
Takamatsu, Takehiro (Izumi, JP)

Application Number: 800893
Filing Date: 1977-05-26
Publication_date: 1978-11-28
Assignee: Tokyo Shibaura Electric Co., Ltd. (Kawasaki, JP); Nippon Hoso Kyokai (Tokyo, JP)
Primary Class(es): 348/614 327/552, 333/165, 455/307
Other Classes:
US Patent Ref:

3480867	Nov, 1969	Sichak	325/476.
3588385	Jun, 1971	Moye	179/170.
4044381	Aug, 1977	Shimano et al.	358/188.

Other Refs:
Primary Examiner: Martin, John C.
Assistant Examiner:
Attorney: Oblon, Fisher, Spivak, McClelland & Maier