JPS5470725A - Television ghost signal erasing device - Google Patents

Television ghost signal erasing device

Info

Publication number
JPS5470725A
JPS5470725A JP13765177A JP13765177A JPS5470725A JP S5470725 A JPS5470725 A JP S5470725A JP 13765177 A JP13765177 A JP 13765177A JP 13765177 A JP13765177 A JP 13765177A JP S5470725 A JPS5470725 A JP S5470725A
Authority
JP
Japan
Prior art keywords
tap gain
correction value
filter
ghost signal
tap
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
JP13765177A
Other languages
Japanese (ja)
Other versions
JPS6145431B2 (en
Inventor
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
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 JP13765177A priority Critical patent/JPS5470725A/en
Publication of JPS5470725A publication Critical patent/JPS5470725A/en
Publication of JPS6145431B2 publication Critical patent/JPS6145431B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Picture Signal Circuits (AREA)
  • Noise Elimination (AREA)

Abstract

PURPOSE:To ensure the effective erasion of the ghost signal caused by the multiple reflection through the TV picture receiver by calculating the tap gain correction value at the arithmetic circuit and via the output of the transversal filter and then correcting the tap gain of the nonvolatile memory. CONSTITUTION:Nonvolatile memory 24 memorizes the tap gain corresponding to each channel of the TV broadcast, reads out the tap gain of the channel from memory 24 in response to the selected broadcast channel, and adds the TV picture receiving signal to the tap gain load via transversal filter 12 with the read-out gain as the original value. Then the tap gain correction value is calculated 23 via the output of filter 12, and the tap gain of filter 12 is corrected based on the tap gain correction value. At the same time, the tap gain of memory 24 is renewed to the correction value. In this way, the ghost signal caused by the multiple reflection of the TV picture receiver can be erased effectively.
JP13765177A 1977-11-16 1977-11-16 Television ghost signal erasing device Granted JPS5470725A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13765177A JPS5470725A (en) 1977-11-16 1977-11-16 Television ghost signal erasing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13765177A JPS5470725A (en) 1977-11-16 1977-11-16 Television ghost signal erasing device

Publications (2)

Publication Number Publication Date
JPS5470725A true JPS5470725A (en) 1979-06-06
JPS6145431B2 JPS6145431B2 (en) 1986-10-08

Family

ID=15203614

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13765177A Granted JPS5470725A (en) 1977-11-16 1977-11-16 Television ghost signal erasing device

Country Status (1)

Country Link
JP (1) JPS5470725A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197971A (en) * 1981-05-29 1982-12-04 Matsushita Electric Ind Co Ltd Ghost eliminating device
JPS58188970A (en) * 1983-04-04 1983-11-04 Sony Corp Ghost eliminating device
JPS5974778A (en) * 1982-10-22 1984-04-27 Zen Nippon Tv Service Kk Automatic erasing system for fault of ghost fluctuating at common receiving point
JPS62216480A (en) * 1987-03-03 1987-09-24 Sony Corp Television signal processing circuit

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57197971A (en) * 1981-05-29 1982-12-04 Matsushita Electric Ind Co Ltd Ghost eliminating device
JPS5974778A (en) * 1982-10-22 1984-04-27 Zen Nippon Tv Service Kk Automatic erasing system for fault of ghost fluctuating at common receiving point
JPS58188970A (en) * 1983-04-04 1983-11-04 Sony Corp Ghost eliminating device
JPS62216480A (en) * 1987-03-03 1987-09-24 Sony Corp Television signal processing circuit
JPH0135545B2 (en) * 1987-03-03 1989-07-26 Sony Corp

Also Published As

Publication number Publication date
JPS6145431B2 (en) 1986-10-08

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