CA1010560A - Pay television system using reference pulse and video inversion - Google Patents
Pay television system using reference pulse and video inversionInfo
- Publication number
- CA1010560A CA1010560A CA200,764A CA200764A CA1010560A CA 1010560 A CA1010560 A CA 1010560A CA 200764 A CA200764 A CA 200764A CA 1010560 A CA1010560 A CA 1010560A
- Authority
- CA
- Canada
- Prior art keywords
- television system
- reference pulse
- pay television
- video inversion
- inversion
- 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
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA200,764A CA1010560A (en) | 1974-05-24 | 1974-05-24 | Pay television system using reference pulse and video inversion |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA200,764A CA1010560A (en) | 1974-05-24 | 1974-05-24 | Pay television system using reference pulse and video inversion |
Publications (1)
Publication Number | Publication Date |
---|---|
CA1010560A true CA1010560A (en) | 1977-05-17 |
Family
ID=4100173
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA200,764A Expired CA1010560A (en) | 1974-05-24 | 1974-05-24 | Pay television system using reference pulse and video inversion |
Country Status (1)
Country | Link |
---|---|
CA (1) | CA1010560A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5553141A (en) * | 1982-07-12 | 1996-09-03 | Scientific-Atlanta, Inc. | Encryption and decryption (scrambling and unscrambling) of video signals |
-
1974
- 1974-05-24 CA CA200,764A patent/CA1010560A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5553141A (en) * | 1982-07-12 | 1996-09-03 | Scientific-Atlanta, Inc. | Encryption and decryption (scrambling and unscrambling) of video signals |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MKEX | Expiry |
Effective date: 19940517 |