JPS54108521A - Eliminator for television ghost signal - Google Patents

Eliminator for television ghost signal

Info

Publication number
JPS54108521A
JPS54108521A JP1524078A JP1524078A JPS54108521A JP S54108521 A JPS54108521 A JP S54108521A JP 1524078 A JP1524078 A JP 1524078A JP 1524078 A JP1524078 A JP 1524078A JP S54108521 A JPS54108521 A JP S54108521A
Authority
JP
Japan
Prior art keywords
tap
tap gain
gain
ghost signal
multiplier
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP1524078A
Other languages
Japanese (ja)
Other versions
JPS628069B2 (en
Inventor
Shunichi Onishi
Junzo Murakami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Japan Broadcasting Corp
Original Assignee
Toshiba Corp
Nippon Hoso Kyokai NHK
Tokyo Shibaura Electric Co Ltd
Japan Broadcasting Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp, Nippon Hoso Kyokai NHK, Tokyo Shibaura Electric Co Ltd, Japan Broadcasting Corp filed Critical Toshiba Corp
Priority to JP1524078A priority Critical patent/JPS54108521A/en
Publication of JPS54108521A publication Critical patent/JPS54108521A/en
Publication of JPS628069B2 publication Critical patent/JPS628069B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/14—Picture signal circuitry for video frequency region
    • H04N5/21—Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
    • H04N5/211—Ghost signal cancellation

Abstract

PURPOSE:To attain the simplification of constitution and reduction in price, by effectively eliminating a ghost signal by composing the load circuit of a transversal filter of an analog multiplier and holding capacitor. CONSTITUTION:Transversal filter 11 consists of tap-attached delay line 11a such as a CCD with a N-stage tap receiving a TV demodulated signal, analog multiplier 11b multiplying each tap output by a tap gain, and adder 11c making addition mixing with each output of multiplier 11b, and the gap gain is determined depending upon the analog voltage value held by holding capacitor Clld. Since although adder 17 corrects the tap gain value by adding 17 the tap gain correction value found by threshold-level circuit 15 to the tap gain value read out from memory 16, Clld has a sufficiently-long time constant, each tap gain of filter 11 focuses gradually through the repetitive correction of the tap gain in each field, so that the ghost signal can be eliminated by the optimum tap gain value finally.
JP1524078A 1978-02-13 1978-02-13 Eliminator for television ghost signal Granted JPS54108521A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1524078A JPS54108521A (en) 1978-02-13 1978-02-13 Eliminator for television ghost signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1524078A JPS54108521A (en) 1978-02-13 1978-02-13 Eliminator for television ghost signal

Publications (2)

Publication Number Publication Date
JPS54108521A true JPS54108521A (en) 1979-08-25
JPS628069B2 JPS628069B2 (en) 1987-02-20

Family

ID=11883329

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1524078A Granted JPS54108521A (en) 1978-02-13 1978-02-13 Eliminator for television ghost signal

Country Status (1)

Country Link
JP (1) JPS54108521A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322811A (en) * 1979-03-16 1982-03-30 U.S. Philips Corporation Clamping circuit for an adaptive filter
EP0055566A2 (en) * 1980-12-22 1982-07-07 Hitachi, Ltd. Ghost reduction circuit arrangement for a television receiver

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322811A (en) * 1979-03-16 1982-03-30 U.S. Philips Corporation Clamping circuit for an adaptive filter
EP0055566A2 (en) * 1980-12-22 1982-07-07 Hitachi, Ltd. Ghost reduction circuit arrangement for a television receiver

Also Published As

Publication number Publication date
JPS628069B2 (en) 1987-02-20

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