JPS56154887A - Sampling circuit for video signal - Google Patents

Sampling circuit for video signal

Info

Publication number
JPS56154887A
JPS56154887A JP5747080A JP5747080A JPS56154887A JP S56154887 A JPS56154887 A JP S56154887A JP 5747080 A JP5747080 A JP 5747080A JP 5747080 A JP5747080 A JP 5747080A JP S56154887 A JPS56154887 A JP S56154887A
Authority
JP
Japan
Prior art keywords
signal
supplied
data
counter
video 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
JP5747080A
Other languages
Japanese (ja)
Inventor
Yuji Inoue
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.)
NEC Home Electronics Ltd
NEC Corp
Original Assignee
NEC Home Electronics Ltd
Nippon 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 NEC Home Electronics Ltd, Nippon Electric Co Ltd filed Critical NEC Home Electronics Ltd
Priority to JP5747080A priority Critical patent/JPS56154887A/en
Publication of JPS56154887A publication Critical patent/JPS56154887A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • H04N7/035—Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimiles In General (AREA)
  • Television Systems (AREA)

Abstract

PURPOSE:To supply a sampling command at any time in one vertical scanning period, by providing a counter which outputs an address signal and a circuit which supplies a video signal corresponding to an optional picture-element position. CONSTITUTION:Counter 2 is reset with vertical synchronizing pulse VSYNC and then counts horizontal synchronizing signal pulses HSYNC successively. Its count value is supplied as address signal A to data buffer BF. Therefore, when timing signal TM is outputted from preset counter 11 at the timing that corresponds to a picture-element position specified with signal HP in each horizontal scanning period, video signal VD is fetched into shift register 12 by signal TM. Then, it is supplied as data SD to buffer BF. Consequently, data SD is stored successively in memory areas of the data buffer specified with signal A. Thus, the sampling start command is supplied at the same period as one vertical scanning time at a maximum.
JP5747080A 1980-04-30 1980-04-30 Sampling circuit for video signal Pending JPS56154887A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5747080A JPS56154887A (en) 1980-04-30 1980-04-30 Sampling circuit for video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5747080A JPS56154887A (en) 1980-04-30 1980-04-30 Sampling circuit for video signal

Publications (1)

Publication Number Publication Date
JPS56154887A true JPS56154887A (en) 1981-11-30

Family

ID=13056574

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5747080A Pending JPS56154887A (en) 1980-04-30 1980-04-30 Sampling circuit for video signal

Country Status (1)

Country Link
JP (1) JPS56154887A (en)

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