JPS5772482A - Data extracting device for character broadcast receiver device - Google Patents

Data extracting device for character broadcast receiver device

Info

Publication number
JPS5772482A
JPS5772482A JP14868380A JP14868380A JPS5772482A JP S5772482 A JPS5772482 A JP S5772482A JP 14868380 A JP14868380 A JP 14868380A JP 14868380 A JP14868380 A JP 14868380A JP S5772482 A JPS5772482 A JP S5772482A
Authority
JP
Japan
Prior art keywords
circuit
positive
peak values
supplied
time
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
JP14868380A
Other languages
Japanese (ja)
Inventor
Toyoji Yabe
Shigetoshi Murakami
Kiichi Hasegawa
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 JP14868380A priority Critical patent/JPS5772482A/en
Publication of JPS5772482A publication Critical patent/JPS5772482A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/025—Systems for the transmission of digital non-picture data, e.g. of text during the active part of a television frame
    • H04N7/035—Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal
    • H04N7/0355—Circuits for the digital non-picture data signal, e.g. for slicing of the data signal, for regeneration of the data-clock signal, for error detection or correction of the data signal for discrimination of the binary level of the digital data, e.g. amplitude slicers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)

Abstract

PURPOSE:To extract character information surely and well from an analogue TV signal, by detecting and holding positive and negative peak values of the character information signal and by adding these peak values in a proper ratio and by using the addition output as a threshold voltage. CONSTITUTION:The output from a video detecting circuit 4 is supplied to positive and negative peak detecting circuits 9 and 10, and positive and negative peak values are detected and held in holding capacitors 11 and 12. These peak values are supplied in a ratio due to resistances 13 and 14 to a comparing circuit 15 and are compared with the video output of the circuit 4 to extract data. This circuit is provided with clamping transistors 18 and 19, and the divided voltage from a connection point PC between resistances 13 and 14 is applied to a gate circuit 20 which is opened in the time of a clock line RI. A gate pulse GR which becomes H in the time of the line RI is applied from a gate pulse forming circuit 23 to the circuit 20, and an intermediate voltage between positive and negative hold voltage is supplied to transistors 18 and 19 through a hold circuit 24 in the time of the line RI.
JP14868380A 1980-10-23 1980-10-23 Data extracting device for character broadcast receiver device Pending JPS5772482A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14868380A JPS5772482A (en) 1980-10-23 1980-10-23 Data extracting device for character broadcast receiver device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14868380A JPS5772482A (en) 1980-10-23 1980-10-23 Data extracting device for character broadcast receiver device

Publications (1)

Publication Number Publication Date
JPS5772482A true JPS5772482A (en) 1982-05-06

Family

ID=15458259

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14868380A Pending JPS5772482A (en) 1980-10-23 1980-10-23 Data extracting device for character broadcast receiver device

Country Status (1)

Country Link
JP (1) JPS5772482A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5990478A (en) * 1982-11-15 1984-05-24 Sony Corp Data slice circuit
EP0555970A3 (en) * 1992-02-10 1994-03-23 Plessey Semiconductors Ltd

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5990478A (en) * 1982-11-15 1984-05-24 Sony Corp Data slice circuit
EP0555970A3 (en) * 1992-02-10 1994-03-23 Plessey Semiconductors Ltd

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