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JPS5634276A - Picture signal processing unit - Google Patents

Picture signal processing unit

Info

Publication number
JPS5634276A
JPS5634276A JP10984779A JP10984779A JPS5634276A JP S5634276 A JPS5634276 A JP S5634276A JP 10984779 A JP10984779 A JP 10984779A JP 10984779 A JP10984779 A JP 10984779A JP S5634276 A JPS5634276 A JP S5634276A
Authority
JP
Japan
Prior art keywords
pulse
signal
adder
picture signal
converter
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
JP10984779A
Other languages
Japanese (ja)
Inventor
Sadao Maeyama
Seisuke Suzuki
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP10984779A priority Critical patent/JPS5634276A/en
Publication of JPS5634276A publication Critical patent/JPS5634276A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)

Abstract

PURPOSE:To make it possible to prevent generation of a false outline even for a small number of bits, by superposing a fixed-frequency pulse signal onto the picture signal and by adjusting the superposed signal so that its peak-to-peak value may be the half of one quantization step approximately. CONSTITUTION:Picture signal S1 is supplied to adder 8 through buffer amplifier 6, and fixed-frequency pulse signal S2 is superposed onto picture signal S1 by adder 8, and the output of adder 8 is supplied to A/D converter 9 and is converted to a binary code with one sample of three bits. Synchronizing signal P1 separated by synchronizing separating circuit 7 is supplied to pulse generator 10 and motor drive circuit 11. Pulse generator 10 generates pulse signal S2 for adder 8, sampling pulse S3 for A/D converter 9, a clock pulse, and switching pulse S4. Pulse signal S2 has the half frequency of sampling pulse S3 and phase difference 90 deg. and is adjusted by level adjusting equipment 13 so that the peak-to-peak value may be the half of one quantization step in A/D converter 9.
JP10984779A 1979-08-29 1979-08-29 Picture signal processing unit Pending JPS5634276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10984779A JPS5634276A (en) 1979-08-29 1979-08-29 Picture signal processing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10984779A JPS5634276A (en) 1979-08-29 1979-08-29 Picture signal processing unit

Publications (1)

Publication Number Publication Date
JPS5634276A true JPS5634276A (en) 1981-04-06

Family

ID=14520693

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10984779A Pending JPS5634276A (en) 1979-08-29 1979-08-29 Picture signal processing unit

Country Status (1)

Country Link
JP (1) JPS5634276A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4682216A (en) * 1983-03-08 1987-07-21 Canon Kabushiki Kaisha Color image picture forming process and apparatus which improves the quality of the black portions of the picture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4682216A (en) * 1983-03-08 1987-07-21 Canon Kabushiki Kaisha Color image picture forming process and apparatus which improves the quality of the black portions of the picture

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