JPS56149872A - Ghost removing device - Google Patents

Ghost removing device

Info

Publication number
JPS56149872A
JPS56149872A JP5334580A JP5334580A JPS56149872A JP S56149872 A JPS56149872 A JP S56149872A JP 5334580 A JP5334580 A JP 5334580A JP 5334580 A JP5334580 A JP 5334580A JP S56149872 A JPS56149872 A JP S56149872A
Authority
JP
Japan
Prior art keywords
ghost
comparator
polarity
noise
signal
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.)
Pending
Application number
JP5334580A
Other languages
Japanese (ja)
Inventor
Akira Kariyado
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
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP5334580A priority Critical patent/JPS56149872A/en
Publication of JPS56149872A publication Critical patent/JPS56149872A/en
Pending 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 detect a ghost which is not influenced by noise and simplify the constitution of a ghost detection device, by providing the first comparator for detecting a ghost whose polarity is positive and the second comparator for detecting a signal whose polarity is negative. CONSTITUTION:A video signal from the input terminal 1 is input to the compounding device 2, and in this compounding device 2 is input a ghost having the reverse polarity against the ghost contained in the original video signal from the transversal filter A1, and it erases the original ghost and is output from the video output terminal 3. This output is provided to the variable delaying circuit 4 and the ghost processing circuit A2. On this circuit A2 are provided the comparator 12 which detects a ghost having the positive polarity at a larger threshold level than a noise level, and the comparator 13 which detects a signal having the negative polarity at a larger threshold level than a noise level. And, the outputs of both the comparators 12, 13 are stored in the counters 14, 15 from the leading edge of the vertical synchronizing signal for a prescribed time, and a ghost which is not influenced by a noise is detected by the outputs of the counters 14, 15.
JP5334580A 1980-04-22 1980-04-22 Ghost removing device Pending JPS56149872A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5334580A JPS56149872A (en) 1980-04-22 1980-04-22 Ghost removing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5334580A JPS56149872A (en) 1980-04-22 1980-04-22 Ghost removing device

Publications (1)

Publication Number Publication Date
JPS56149872A true JPS56149872A (en) 1981-11-19

Family

ID=12940174

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5334580A Pending JPS56149872A (en) 1980-04-22 1980-04-22 Ghost removing device

Country Status (1)

Country Link
JP (1) JPS56149872A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60130270A (en) * 1983-12-16 1985-07-11 Matsushita Electric Ind Co Ltd Ghost eliminating device
JPS61152171A (en) * 1984-12-26 1986-07-10 Toshiba Corp Digital ghost eliminating device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60130270A (en) * 1983-12-16 1985-07-11 Matsushita Electric Ind Co Ltd Ghost eliminating device
JPS61152171A (en) * 1984-12-26 1986-07-10 Toshiba Corp Digital ghost eliminating device

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