JPS5720078A - Detector for synchronizing signal - Google Patents

Detector for synchronizing signal

Info

Publication number
JPS5720078A
JPS5720078A JP9467780A JP9467780A JPS5720078A JP S5720078 A JPS5720078 A JP S5720078A JP 9467780 A JP9467780 A JP 9467780A JP 9467780 A JP9467780 A JP 9467780A JP S5720078 A JPS5720078 A JP S5720078A
Authority
JP
Japan
Prior art keywords
signal
synchronizing signal
quantization
parts
sampling
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
JP9467780A
Other languages
Japanese (ja)
Inventor
Yasuhito Okawa
Tsutomu Asabe
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP9467780A priority Critical patent/JPS5720078A/en
Publication of JPS5720078A publication Critical patent/JPS5720078A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal

Abstract

PURPOSE:To reduce the package area of parts by detecting a necessary synchronizing signal by a digital circuit when performing the digital processing of pictures by using video signals. CONSTITUTION:When a video signal (a) clamped to 0V and a sampling signal fs are inputted to an A/D converting element 1, sampling is performed by the sampling signal fs and then quantization outputs D8-D1 are obtained. The quantization level of a synchronizing signal period is set to a ''0'' + level to obtain a real signal ''L'' in the synchronizing signal period as the quantization output D8-D1. When the quantization outputs D8-D1 are inputted to an OR element 2, a real signal ''H'' appears at the output of the element when all bits of the quantization outputs D8- D1 are at ''L'', thus detecting a synchronizing signal. Consequently, the number of parts is decreased greatly to reduce the package area of the parts.
JP9467780A 1980-07-10 1980-07-10 Detector for synchronizing signal Pending JPS5720078A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9467780A JPS5720078A (en) 1980-07-10 1980-07-10 Detector for synchronizing signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9467780A JPS5720078A (en) 1980-07-10 1980-07-10 Detector for synchronizing signal

Publications (1)

Publication Number Publication Date
JPS5720078A true JPS5720078A (en) 1982-02-02

Family

ID=14116845

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9467780A Pending JPS5720078A (en) 1980-07-10 1980-07-10 Detector for synchronizing signal

Country Status (1)

Country Link
JP (1) JPS5720078A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02281878A (en) * 1989-04-24 1990-11-19 Nec Corp Digital video signal horizontal synchronizing separator circuit
JP2014029530A (en) * 1996-10-22 2014-02-13 Seiko Epson Corp Substrate for liquid crystal panel, liquid crystal panel, electronic apparatus, and projection type display device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5183723A (en) * 1975-01-21 1976-07-22 Japan Broadcasting Corp FUGOKATEREBIJONSHINGODENSOHOSHIKI

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5183723A (en) * 1975-01-21 1976-07-22 Japan Broadcasting Corp FUGOKATEREBIJONSHINGODENSOHOSHIKI

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02281878A (en) * 1989-04-24 1990-11-19 Nec Corp Digital video signal horizontal synchronizing separator circuit
JP2014029530A (en) * 1996-10-22 2014-02-13 Seiko Epson Corp Substrate for liquid crystal panel, liquid crystal panel, electronic apparatus, and projection type display device

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