JPS5754487A - Discriminating method for secam signal - Google Patents
Discriminating method for secam signalInfo
- Publication number
- JPS5754487A JPS5754487A JP13042880A JP13042880A JPS5754487A JP S5754487 A JPS5754487 A JP S5754487A JP 13042880 A JP13042880 A JP 13042880A JP 13042880 A JP13042880 A JP 13042880A JP S5754487 A JPS5754487 A JP S5754487A
- Authority
- JP
- Japan
- Prior art keywords
- pulse
- subcarrier
- signal
- color
- inputted
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/44—Colour synchronisation
- H04N9/47—Colour synchronisation for sequential signals
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/64—Circuits for processing colour signals
- H04N9/642—Multi-standard receivers
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Processing Of Color Television Signals (AREA)
- Color Television Systems (AREA)
Abstract
PURPOSE: To make stable the discriminating operation of SECAM signals different in frequencies alternately for every horizontal scanning line, by picking up color subcarrier of back porch in a horizontal synchronizing signal and frequency-discriminating the harmonics of this subcarrier for every horizontal scanning line.
CONSTITUTION: A monostable multivibrator 4 is triggered at the front edge of an inputted horizontal synchronizing pulse 20 to output a pulse 22 having a prescribed pulse width (a), a monostable multivibrator 6 is triggered with the rear edge of the pulse 22 to output a burst gate pulse 24 in pulse width (b). This pulse width (b) is taken for sufficient width to pick up a subcarrier 26 and the pulse 24 is applied to a gate circuit 8. On the other hand, a color TV signal is inputted to a BPF12, and the color signal rejecting luminance signal is inputted to the circuit 8 via a limiter 14. The subcarrier is picked up from the color signal, the result passes through a BPF16 in which the center frequency has three times or more spectrum of the subcarrier 26, the output is applied to a frequency discrimination circuit 18 to make the discrimination of the SECAM signal stable.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13042880A JPS5754487A (en) | 1980-09-19 | 1980-09-19 | Discriminating method for secam signal |
GB8128146A GB2086174B (en) | 1980-09-19 | 1981-09-17 | Circuit for discriminating secam television signals |
FR8117971A FR2490904B1 (en) | 1980-09-19 | 1981-09-18 | SECAM-TYPE TELEVISION SIGNAL DISCRIMINATION CIRCUIT |
DE19813137269 DE3137269C2 (en) | 1980-09-19 | 1981-09-18 | Circuitry for distinguishing signals from the SECAM color television system from signals from other color television systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13042880A JPS5754487A (en) | 1980-09-19 | 1980-09-19 | Discriminating method for secam signal |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5754487A true JPS5754487A (en) | 1982-03-31 |
JPS6326593B2 JPS6326593B2 (en) | 1988-05-30 |
Family
ID=15034001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13042880A Granted JPS5754487A (en) | 1980-09-19 | 1980-09-19 | Discriminating method for secam signal |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5754487A (en) |
DE (1) | DE3137269C2 (en) |
FR (1) | FR2490904B1 (en) |
GB (1) | GB2086174B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2086175B (en) * | 1980-09-21 | 1984-07-25 | Victor Company Of Japan | Circuit for discriminating secam television signals |
DE245038T1 (en) * | 1986-05-01 | 1988-04-07 | Victor Company Of Japan, Ltd., Yokohama, Kanagawa | DISCRIMINATION CIRCUIT FOR DISCRIMINATION OF A COLOR TV SYSTEM. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL6801582A (en) * | 1968-02-03 | 1969-08-05 | ||
JPS5086225A (en) * | 1973-11-29 | 1975-07-11 | ||
DE2616694A1 (en) * | 1976-04-15 | 1977-10-27 | Graetz Gmbh & Co Ohg | CIRCUIT ARRANGEMENT FOR THE AUTOMATIC SWITCHING OF A COMBINED PAL SECAM DECODER TO THE PAL OR SECAM SYSTEM |
-
1980
- 1980-09-19 JP JP13042880A patent/JPS5754487A/en active Granted
-
1981
- 1981-09-17 GB GB8128146A patent/GB2086174B/en not_active Expired
- 1981-09-18 FR FR8117971A patent/FR2490904B1/en not_active Expired
- 1981-09-18 DE DE19813137269 patent/DE3137269C2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3137269A1 (en) | 1982-05-27 |
GB2086174B (en) | 1984-08-08 |
GB2086174A (en) | 1982-05-06 |
FR2490904A1 (en) | 1982-03-26 |
DE3137269C2 (en) | 1984-10-31 |
FR2490904B1 (en) | 1985-06-28 |
JPS6326593B2 (en) | 1988-05-30 |
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