JPS6467081A - Discriminating circuit for video signal form - Google Patents

Discriminating circuit for video signal form

Info

Publication number
JPS6467081A
JPS6467081A JP22331787A JP22331787A JPS6467081A JP S6467081 A JPS6467081 A JP S6467081A JP 22331787 A JP22331787 A JP 22331787A JP 22331787 A JP22331787 A JP 22331787A JP S6467081 A JPS6467081 A JP S6467081A
Authority
JP
Japan
Prior art keywords
data
signal
obtaining
horizontal
horizontal synchronizing
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
JP22331787A
Other languages
Japanese (ja)
Inventor
Toshio Machida
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
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 filed Critical Toshiba Corp
Priority to JP22331787A priority Critical patent/JPS6467081A/en
Publication of JPS6467081A publication Critical patent/JPS6467081A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To effectively identify a signal form by providing a means for obtaining data of the number of effective scanning lines of the effective scanning line signal of an input luminance signal, a means for obtaining data of the number horizontal synchronizing signals of the input luminance signal, a means for obtaining the frequency data of the horizontal synchronizing signal, and a decoder for deciding the form of the input luminance signal from these data. CONSTITUTION:A counting and latch means 19 for obtaining the data of the number of effective scanning lines by counting the effective scanning line signal for one vertical period and latching a counted value and a horizontal counter means 20 for counting the number of horizontal synchronizing signals of the input luminance signal, and obtaining the data of the number of horizontal synchronizing signals are provided. Further, a converting means 21 in which the horizontal synchronizing signal is applied with frequency/voltage conversion, and the voltage is applied to analog/digital conversion to obtain horizontal frequency data and the decoder means 23 for inputting the effective scanning line number data, data of the number of horizontal synchronizing signals data and the horizontal frequency data and obtaining the discriminating output of the signal form of the input luminance signal based on these data are provided. Thereby, even when the horizontal frequency approaches, the form can be correctly identified.
JP22331787A 1987-09-07 1987-09-07 Discriminating circuit for video signal form Pending JPS6467081A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22331787A JPS6467081A (en) 1987-09-07 1987-09-07 Discriminating circuit for video signal form

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22331787A JPS6467081A (en) 1987-09-07 1987-09-07 Discriminating circuit for video signal form

Publications (1)

Publication Number Publication Date
JPS6467081A true JPS6467081A (en) 1989-03-13

Family

ID=16796258

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22331787A Pending JPS6467081A (en) 1987-09-07 1987-09-07 Discriminating circuit for video signal form

Country Status (1)

Country Link
JP (1) JPS6467081A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04116482U (en) * 1991-03-28 1992-10-19 日本電気ホームエレクトロニクス株式会社 HDTV receiver
US5347318A (en) * 1992-06-16 1994-09-13 Canon Kabushiki Kaisha Apparatus for processing video signals having different aspect ratios

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04116482U (en) * 1991-03-28 1992-10-19 日本電気ホームエレクトロニクス株式会社 HDTV receiver
US5347318A (en) * 1992-06-16 1994-09-13 Canon Kabushiki Kaisha Apparatus for processing video signals having different aspect ratios

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