JPS54103634A - Character broadcast demodulating device - Google Patents

Character broadcast demodulating device

Info

Publication number
JPS54103634A
JPS54103634A JP1096778A JP1096778A JPS54103634A JP S54103634 A JPS54103634 A JP S54103634A JP 1096778 A JP1096778 A JP 1096778A JP 1096778 A JP1096778 A JP 1096778A JP S54103634 A JPS54103634 A JP S54103634A
Authority
JP
Japan
Prior art keywords
color
character
circuit
signal
character 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.)
Granted
Application number
JP1096778A
Other languages
Japanese (ja)
Other versions
JPS5946474B2 (en
Inventor
Kansei Nakamura
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 JP1096778A priority Critical patent/JPS5946474B2/en
Publication of JPS54103634A publication Critical patent/JPS54103634A/en
Publication of JPS5946474B2 publication Critical patent/JPS5946474B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Color Television Systems (AREA)

Abstract

PURPOSE: To ensure the display of the characters via the difference of black and white by identifying the color characters by the contrast differing every color or the dot of the flash effect when the color character broadcast is received through the white-black TV picture receiver.
CONSTITUTION: Receiving part 1 receives the character signal sent from in pile on the TV signal as well as the coloring signal showing the color of the character signal. Character signal modulator circuit 2 which contains the buffer memory and modulates the received character signal. And modulator circuit 5 changes the difference of the color of the character signals into the brightness and displays it at display part 4. Circuit 5 comprises operational amplifier circuit 12 which supplies the color signals of terminal 6, 7 and 8 via resistance 9, 10 and 11, output level converter circuit 15, the switching circuit consisting of diode 18 and 19 plus resistance 20 and 21, and the impedance converter circuit consisting of transistor 25 respectively.
COPYRIGHT: (C)1979,JPO&Japio
JP1096778A 1978-02-01 1978-02-01 Teletext demodulator Expired JPS5946474B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1096778A JPS5946474B2 (en) 1978-02-01 1978-02-01 Teletext demodulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1096778A JPS5946474B2 (en) 1978-02-01 1978-02-01 Teletext demodulator

Publications (2)

Publication Number Publication Date
JPS54103634A true JPS54103634A (en) 1979-08-15
JPS5946474B2 JPS5946474B2 (en) 1984-11-13

Family

ID=11764928

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1096778A Expired JPS5946474B2 (en) 1978-02-01 1978-02-01 Teletext demodulator

Country Status (1)

Country Link
JP (1) JPS5946474B2 (en)

Also Published As

Publication number Publication date
JPS5946474B2 (en) 1984-11-13

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