ES402488A1 - Demodulation system - Google Patents
Demodulation systemInfo
- Publication number
- ES402488A1 ES402488A1 ES402488A ES402488A ES402488A1 ES 402488 A1 ES402488 A1 ES 402488A1 ES 402488 A ES402488 A ES 402488A ES 402488 A ES402488 A ES 402488A ES 402488 A1 ES402488 A1 ES 402488A1
- Authority
- ES
- Spain
- Prior art keywords
- line
- components
- pal
- phase
- output
- 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.)
- Expired
Links
Classifications
-
- 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)
Abstract
"Refinements in television receivers for PAL/SECAM systems" fitted with normal PAL components to elaborate the line-by-line phase inversion of a color signal and to verify the phase of a line-by-line switching device, and components of SECAM reception that make use of some of the PAL operating components such as the delay line of a horizontal line period, characterized by the fact that said receivers comprise, for SECAN chroma, frequency demodulating means arranged to send demodulated color signals, by line shift per line at an output, an amplitude modulator to feed the demodulated color signals, in turn, at the output of a local oscillator intended as one of the normal PAL components, said output being fed to the amplitude modulator through a phase switched line by line between two phase changes that differ by 90º, and means that couple the signal control is thus remodulated to said normal PAL components for power, as separate demodulated color signals, at their respective outputs. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1385971A GB1358551A (en) | 1971-05-07 | 1971-05-07 | Demodulation system |
Publications (1)
Publication Number | Publication Date |
---|---|
ES402488A1 true ES402488A1 (en) | 1975-03-16 |
Family
ID=10030679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES402488A Expired ES402488A1 (en) | 1971-05-07 | 1972-05-06 | Demodulation system |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE783041A (en) |
DE (1) | DE2221888C3 (en) |
ES (1) | ES402488A1 (en) |
FR (1) | FR2137595B1 (en) |
GB (1) | GB1358551A (en) |
IT (1) | IT955273B (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2288439A1 (en) | 1974-10-15 | 1976-05-14 | Thomson Brandt | COLOR TELEVISION SEQUENTIAL SIGNAL TRANSCODER DEVICE |
IT1050650B (en) * | 1975-11-17 | 1981-03-20 | Indesit | TELEVISION CHROMATIC SIGNAL PROCESSOR CIRCUIT |
EP0003393B1 (en) | 1978-01-18 | 1982-06-23 | Rca Corporation | Chroma demodulator circuit for secam television signals |
US4240102A (en) * | 1978-03-16 | 1980-12-16 | Rca Corporation | Identification system for SECAM or SECAM/PAL color television receivers |
DE3065643D1 (en) * | 1979-01-09 | 1983-12-29 | Rca Corp | Luminance delay control apparatus in pal/secam television receiver |
EP0013597A1 (en) * | 1979-01-09 | 1980-07-23 | Rca Corporation | Signal switching apparatus |
NL8005532A (en) * | 1980-10-07 | 1982-05-03 | Philips Nv | TRANSCODE SWITCH. |
-
1971
- 1971-05-07 GB GB1385971A patent/GB1358551A/en not_active Expired
-
1972
- 1972-05-04 DE DE19722221888 patent/DE2221888C3/en not_active Expired
- 1972-05-04 BE BE783041A patent/BE783041A/en not_active IP Right Cessation
- 1972-05-05 FR FR7216273A patent/FR2137595B1/fr not_active Expired
- 1972-05-06 ES ES402488A patent/ES402488A1/en not_active Expired
- 1972-05-06 IT IT2402772A patent/IT955273B/en active
Also Published As
Publication number | Publication date |
---|---|
FR2137595B1 (en) | 1977-04-01 |
IT955273B (en) | 1973-09-29 |
DE2221888C3 (en) | 1979-09-27 |
DE2221888B2 (en) | 1974-11-14 |
FR2137595A1 (en) | 1972-12-29 |
GB1358551A (en) | 1974-07-03 |
DE2221888A1 (en) | 1972-11-23 |
BE783041A (en) | 1972-09-01 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FD1A | Patent lapsed |
Effective date: 19940530 |