CA1016647A - Appareil de chiffrage/dechiffrage de signaux modules en amplitude - Google Patents
Appareil de chiffrage/dechiffrage de signaux modules en amplitudeInfo
- Publication number
- CA1016647A CA1016647A CA230,897A CA230897A CA1016647A CA 1016647 A CA1016647 A CA 1016647A CA 230897 A CA230897 A CA 230897A CA 1016647 A CA1016647 A CA 1016647A
- Authority
- CA
- Canada
- Prior art keywords
- unscrambling
- scrambling
- modulated signal
- amplitude modulated
- amplitude
- 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
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
- H04N7/171—Systems operating in the amplitude domain of the television signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA230,897A CA1016647A (fr) | 1975-07-07 | 1975-07-07 | Appareil de chiffrage/dechiffrage de signaux modules en amplitude |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA230,897A CA1016647A (fr) | 1975-07-07 | 1975-07-07 | Appareil de chiffrage/dechiffrage de signaux modules en amplitude |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1016647A true CA1016647A (fr) | 1977-08-30 |
Family
ID=4103545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA230,897A Expired CA1016647A (fr) | 1975-07-07 | 1975-07-07 | Appareil de chiffrage/dechiffrage de signaux modules en amplitude |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA1016647A (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990013973A1 (fr) * | 1989-05-01 | 1990-11-15 | Scientific-Atlanta, Inc. | Brouilleur a auto-etalonnage ameliore |
US5177787A (en) * | 1989-05-01 | 1993-01-05 | Scientific-Atlanta, Inc | Scrambler with self-calibration |
-
1975
- 1975-07-07 CA CA230,897A patent/CA1016647A/fr not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1990013973A1 (fr) * | 1989-05-01 | 1990-11-15 | Scientific-Atlanta, Inc. | Brouilleur a auto-etalonnage ameliore |
GB2247808A (en) * | 1989-05-01 | 1992-03-11 | Scientific Atlanta | An improved scrambler with self-calibration |
US5177787A (en) * | 1989-05-01 | 1993-01-05 | Scientific-Atlanta, Inc | Scrambler with self-calibration |
GB2247808B (en) * | 1989-05-01 | 1994-05-18 | Scientific Atlanta | An improved scrambler with self-calibration |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |
Effective date: 19940830 |