JPS5776978A - Automatic screen discriminator - Google Patents

Automatic screen discriminator

Info

Publication number
JPS5776978A
JPS5776978A JP15136380A JP15136380A JPS5776978A JP S5776978 A JPS5776978 A JP S5776978A JP 15136380 A JP15136380 A JP 15136380A JP 15136380 A JP15136380 A JP 15136380A JP S5776978 A JPS5776978 A JP S5776978A
Authority
JP
Japan
Prior art keywords
picture
interval
white
electric signal
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
JP15136380A
Other languages
Japanese (ja)
Inventor
Yoji Furukawa
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 JP15136380A priority Critical patent/JPS5776978A/en
Publication of JPS5776978A publication Critical patent/JPS5776978A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N17/00—Diagnosis, testing or measuring for television systems or their details
    • H04N17/04—Diagnosis, testing or measuring for television systems or their details for receivers

Landscapes

  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • General Health & Medical Sciences (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Details Of Television Scanning (AREA)

Abstract

PURPOSE:To automatically discriminate the state of a picture, by detecting a prescribed picture displayed on a CRT in order to obtain a specified electric signal, and comparing the pulse interval of this electric signal with the reference pulse interval. CONSTITUTION:Lattice shape white/black picture is displayed on a CRT1' with a signal generator 1. This picture is detected at a photo detector 4 and converted into an electric signal corresponding to the intensity of light and sample-held through a latch circuit 11 and converted into a signal corresponding to white/black picture. This signal is compared with the reference interval set in a comparator (not shown). Thus, since the interval of white/black picture pictured is automatically compared with the reference interval, the distortion of picture is detected with good accuracy.
JP15136380A 1980-10-30 1980-10-30 Automatic screen discriminator Pending JPS5776978A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15136380A JPS5776978A (en) 1980-10-30 1980-10-30 Automatic screen discriminator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15136380A JPS5776978A (en) 1980-10-30 1980-10-30 Automatic screen discriminator

Publications (1)

Publication Number Publication Date
JPS5776978A true JPS5776978A (en) 1982-05-14

Family

ID=15516899

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15136380A Pending JPS5776978A (en) 1980-10-30 1980-10-30 Automatic screen discriminator

Country Status (1)

Country Link
JP (1) JPS5776978A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554578A1 (en) * 1983-11-04 1985-05-10 Videocolor METHOD FOR MEASURING DEFORMATIONS OF A SIGHT AND APPARATUS IMPLEMENTING THE METHOD

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2554578A1 (en) * 1983-11-04 1985-05-10 Videocolor METHOD FOR MEASURING DEFORMATIONS OF A SIGHT AND APPARATUS IMPLEMENTING THE METHOD
EP0141740A2 (en) * 1983-11-04 1985-05-15 Videocolor Device and process for measuring distortions of a test pattern

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