JPS6417579A - Image memory device - Google Patents

Image memory device

Info

Publication number
JPS6417579A
JPS6417579A JP17434087A JP17434087A JPS6417579A JP S6417579 A JPS6417579 A JP S6417579A JP 17434087 A JP17434087 A JP 17434087A JP 17434087 A JP17434087 A JP 17434087A JP S6417579 A JPS6417579 A JP S6417579A
Authority
JP
Japan
Prior art keywords
clock
picture
compressed
image memory
frequency
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
JP17434087A
Other languages
Japanese (ja)
Other versions
JPH0517750B2 (en
Inventor
Satoshi Harada
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic 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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP17434087A priority Critical patent/JPS6417579A/en
Publication of JPS6417579A publication Critical patent/JPS6417579A/en
Publication of JPH0517750B2 publication Critical patent/JPH0517750B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Processing Of Color Television Signals (AREA)
  • Image Processing (AREA)
  • Studio Circuits (AREA)

Abstract

PURPOSE:To simplify circuit constitution, to reduce the number of parts as well as cost by making a read clock for an image memory and a scamplign clock for a D/A converter such a clock as whose frequency is n-times of a color subcarrier frequency. CONSTITUTION:Data sampled by an A/D converter 20 is written in the image memory 23, then the data is read out with the clock of a frequency of 4fsc2 and D/A-converted, then a waveform in which the time base is compressed to 1/5 and a color subcarrier is continuous is obtained. Thus, an image can be compressed in the horizontal direction while maintaining the form of a composite video signal, while the compression in the vertical direction is realized by thinning out scanning lines, hence the picture as a whole can be contracted. Compressed image information thus obtained is selected timely instead of a composite video signal for a new picture by means of a switch 27, and supplied to a monitor, and as a result, a slave picture can be displayed in the new picture.
JP17434087A 1987-07-13 1987-07-13 Image memory device Granted JPS6417579A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17434087A JPS6417579A (en) 1987-07-13 1987-07-13 Image memory device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17434087A JPS6417579A (en) 1987-07-13 1987-07-13 Image memory device

Publications (2)

Publication Number Publication Date
JPS6417579A true JPS6417579A (en) 1989-01-20
JPH0517750B2 JPH0517750B2 (en) 1993-03-10

Family

ID=15976927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17434087A Granted JPS6417579A (en) 1987-07-13 1987-07-13 Image memory device

Country Status (1)

Country Link
JP (1) JPS6417579A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2263756A1 (en) 1971-12-31 1973-07-05 Minolta Camera Kk COMPACT VARIO LENS ARRANGEMENT
JPH05211633A (en) * 1991-07-18 1993-08-20 Internatl Business Mach Corp <Ibm> System and method of combining multiple composite video signal and changing said signal into single output data stream
EP0738090A3 (en) * 1995-04-10 1998-04-15 Matsushita Electric Industrial Co., Ltd. Waveform display signal generating apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2263756A1 (en) 1971-12-31 1973-07-05 Minolta Camera Kk COMPACT VARIO LENS ARRANGEMENT
JPH05211633A (en) * 1991-07-18 1993-08-20 Internatl Business Mach Corp <Ibm> System and method of combining multiple composite video signal and changing said signal into single output data stream
EP0738090A3 (en) * 1995-04-10 1998-04-15 Matsushita Electric Industrial Co., Ltd. Waveform display signal generating apparatus
US5828358A (en) * 1995-04-10 1998-10-27 Matsushita Electric Industrial Co., Ltd. Waveform display signal generating apparatus

Also Published As

Publication number Publication date
JPH0517750B2 (en) 1993-03-10

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