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JPS6489886A - Composite video signal forming circuit - Google Patents

Composite video signal forming circuit

Info

Publication number
JPS6489886A
JPS6489886A JP62246538A JP24653887A JPS6489886A JP S6489886 A JPS6489886 A JP S6489886A JP 62246538 A JP62246538 A JP 62246538A JP 24653887 A JP24653887 A JP 24653887A JP S6489886 A JPS6489886 A JP S6489886A
Authority
JP
Japan
Prior art keywords
signal
character
comb line
switch
line filter
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
JP62246538A
Other languages
Japanese (ja)
Inventor
Tadashi Ezaki
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 JP62246538A priority Critical patent/JPS6489886A/en
Publication of JPS6489886A publication Critical patent/JPS6489886A/en
Pending legal-status Critical Current

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  • Color Television Systems (AREA)

Abstract

PURPOSE:To enable the dislocation of a character to be eliminated by selecting one of the output signal of a circuit inserting a character signal and the output signal of a comb line filter with the aid of a switch which is switched and controlled based on the character signal. CONSTITUTION:The comb line filter 4 which has comb line characteristic and to which a luminance signal, which the character signal is inserted to, is supplied is provided near subcarrier frequency (fsc) and formed to select one of the output of the character insersion circuit 2 and the output signal of the comb line filter 4. That means, the switch 11 which is switched and controlled according to the character signal and an adder 5 which makes a composite video signal by adding the signal selected by the switch 11 and a chrome signal having the subcarrier frequency are provided. In the term when the character signal is inserted, the luminance signal to which the character signal is inserted by the switch and the comb line filter is not used in that term. Thus the dislocation of the character is eliminated.
JP62246538A 1987-09-30 1987-09-30 Composite video signal forming circuit Pending JPS6489886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62246538A JPS6489886A (en) 1987-09-30 1987-09-30 Composite video signal forming circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62246538A JPS6489886A (en) 1987-09-30 1987-09-30 Composite video signal forming circuit

Publications (1)

Publication Number Publication Date
JPS6489886A true JPS6489886A (en) 1989-04-05

Family

ID=17149897

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62246538A Pending JPS6489886A (en) 1987-09-30 1987-09-30 Composite video signal forming circuit

Country Status (1)

Country Link
JP (1) JPS6489886A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5387941A (en) * 1991-06-14 1995-02-07 Wavephore, Inc. Data with video transmitter
US5410360A (en) * 1991-06-14 1995-04-25 Wavephore, Inc. Timing control for injecting a burst and data into a video signal
US5557333A (en) * 1991-06-14 1996-09-17 Wavephore, Inc. System for transparent transmission and reception of a secondary data signal with a video signal in the video band
US5559559A (en) * 1991-06-14 1996-09-24 Wavephore, Inc. Transmitting a secondary signal with dynamic injection level control
US5617148A (en) * 1991-06-14 1997-04-01 Wavephore, Inc. Filter by-pass for transmitting an additional signal with a video signal
US5831679A (en) * 1991-06-14 1998-11-03 Wavephore, Inc. Network for retrieval and video transmission of information

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5387941A (en) * 1991-06-14 1995-02-07 Wavephore, Inc. Data with video transmitter
US5410360A (en) * 1991-06-14 1995-04-25 Wavephore, Inc. Timing control for injecting a burst and data into a video signal
US5557333A (en) * 1991-06-14 1996-09-17 Wavephore, Inc. System for transparent transmission and reception of a secondary data signal with a video signal in the video band
US5559559A (en) * 1991-06-14 1996-09-24 Wavephore, Inc. Transmitting a secondary signal with dynamic injection level control
US5572247A (en) * 1991-06-14 1996-11-05 Wavephore, Inc. Processor for receiving data from a video signal
US5587743A (en) * 1991-06-14 1996-12-24 Wavephore, Inc. Signal processors for transparent and simultaneous transmission and reception of a data signal in a video signal
US5617148A (en) * 1991-06-14 1997-04-01 Wavephore, Inc. Filter by-pass for transmitting an additional signal with a video signal
US5666168A (en) * 1991-06-14 1997-09-09 Wavephore, Inc. System for transmitting facsimile data in the upper vestigial chrominance sideband of a video signal
US5831679A (en) * 1991-06-14 1998-11-03 Wavephore, Inc. Network for retrieval and video transmission of information

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