JPS56132873A - Special effect signal generation system - Google Patents

Special effect signal generation system

Info

Publication number
JPS56132873A
JPS56132873A JP3667980A JP3667980A JPS56132873A JP S56132873 A JPS56132873 A JP S56132873A JP 3667980 A JP3667980 A JP 3667980A JP 3667980 A JP3667980 A JP 3667980A JP S56132873 A JPS56132873 A JP S56132873A
Authority
JP
Japan
Prior art keywords
signal
fader
comparator
radius
square
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
JP3667980A
Other languages
Japanese (ja)
Inventor
Akira 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.)
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 JP3667980A priority Critical patent/JPS56132873A/en
Publication of JPS56132873A publication Critical patent/JPS56132873A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265—Mixing

Landscapes

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

Abstract

PURPOSE:To make constant the ratio of variation of the radius of a circular wiper pattern, by comparing a mixing signal of parabolic horizontal and vertical fundamental waves, with a slice signal which has been obtained by additionally providing a square-law transducer between the fader and the comparator. CONSTITUTION:When a horizontal fundamental wave generator 1 of a parabolic waveform, and a vertical fundamental wave generator 2 are mixed by a mixer 3, its result becomes a square-law curve as shown in the figure (b). On the other hand, when a transducer 5 is inserted between a fader 4 for generating a fader signal by the external control, and a comparator 6, and the fader signal is square- law-converted, the slice potential becomes as shown in the figure (a). A circular wiper signal is generated to the output terminal 7 by comparing a slice signal with an output signal of the mixer 3 by the comparator 6. By doing so, as shown in the figure (c), even when the radius of the circular wiper is large or small, the ratio of variation of its radius is constant, and the fader is operated smoothly.
JP3667980A 1980-03-21 1980-03-21 Special effect signal generation system Pending JPS56132873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3667980A JPS56132873A (en) 1980-03-21 1980-03-21 Special effect signal generation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3667980A JPS56132873A (en) 1980-03-21 1980-03-21 Special effect signal generation system

Publications (1)

Publication Number Publication Date
JPS56132873A true JPS56132873A (en) 1981-10-17

Family

ID=12476533

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3667980A Pending JPS56132873A (en) 1980-03-21 1980-03-21 Special effect signal generation system

Country Status (1)

Country Link
JP (1) JPS56132873A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6043975A (en) * 1983-08-20 1985-03-08 Sony Corp Circular wipe signal generating circuit
EP0462805A2 (en) * 1990-06-21 1991-12-27 Matsushita Electric Industrial Co., Ltd. Digital wipe pattern generating device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6043975A (en) * 1983-08-20 1985-03-08 Sony Corp Circular wipe signal generating circuit
JPH0527304B2 (en) * 1983-08-20 1993-04-20 Sony Corp
EP0462805A2 (en) * 1990-06-21 1991-12-27 Matsushita Electric Industrial Co., Ltd. Digital wipe pattern generating device

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