JPS5772482A - Data extracting device for character broadcast receiver device - Google Patents
Data extracting device for character broadcast receiver deviceInfo
- 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
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.
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 (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5990478A (en) * | 1982-11-15 | 1984-05-24 | Sony Corp | Data slice circuit |
EP0369159A2 (en) * | 1988-11-15 | 1990-05-23 | ANT Nachrichtentechnik GmbH | Method for the restitution of binary information from a basic band signal showing faults, and arrangement |
EP0555970A2 (en) * | 1992-02-10 | 1993-08-18 | Plessey Semiconductors Limited | Data tracking system |
-
1980
- 1980-10-23 JP JP14868380A patent/JPS5772482A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5990478A (en) * | 1982-11-15 | 1984-05-24 | Sony Corp | Data slice circuit |
EP0369159A2 (en) * | 1988-11-15 | 1990-05-23 | ANT Nachrichtentechnik GmbH | Method for the restitution of binary information from a basic band signal showing faults, and arrangement |
EP0555970A2 (en) * | 1992-02-10 | 1993-08-18 | Plessey Semiconductors Limited | Data tracking system |
EP0555970A3 (en) * | 1992-02-10 | 1994-03-23 | Plessey Semiconductors Ltd |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE68910711D1 (en) | Different timing for use in integrated circuits. | |
JPS5289420A (en) | Processing method for color television signal | |
JPS5730192A (en) | Sense amplifying circuit | |
JPS57106227A (en) | Buffer circuit | |
KR830005799A (en) | Control output synthesis key signal generator for television receiver | |
JPS5324766A (en) | Driving circuit for electronic device | |
KR900019364A (en) | Integrator circuit | |
JPS5772482A (en) | Data extracting device for character broadcast receiver device | |
TW355881B (en) | Bootstrap circuit | |
GB1162447A (en) | Improvements relating to Electric Motor Control Circuits. | |
GB2075781A (en) | Sample and hold circuit with offset cancellation | |
JPS57195387A (en) | Data lien precharging system of memory integrated circuit | |
TW431067B (en) | Single source differential circuit | |
JPS5412539A (en) | Integrating circuit | |
GB976310A (en) | Improvements in or relating to electric gating circuits | |
JPS54100652A (en) | Sampler | |
EP0320641A3 (en) | Device for automatically selecting the demodulation standard of a video signal, useful with an intermediate frequency demodulator | |
JPS5741075A (en) | Border compensating circuit | |
JPS5781783A (en) | Synchronizing signal removing circuit | |
JPS5772481A (en) | Data extracting circuit for character broad-cast receiving device | |
JPS54114113A (en) | Picture information reading device | |
JPS57208771A (en) | Energy scattering signal eliminating circuit | |
JPS6418332A (en) | Timing extraction circuit | |
JPS5680965A (en) | Synchronizing signal separating circuit | |
JPS5642150A (en) | Circuit for forming unblanking signal |