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CA1010560A - Pay television system using reference pulse and video inversion - Google Patents

Pay television system using reference pulse and video inversion

Info

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
Application number
CA200,764A
Other versions
CA200764S (en
Inventor
Irving Horowitz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TELEGLOBE PAY-TV SYSTEM
Original Assignee
TELEGLOBE PAY-TV SYSTEM
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by TELEGLOBE PAY-TV SYSTEM filed Critical TELEGLOBE PAY-TV SYSTEM
Priority to CA200,764A priority Critical patent/CA1010560A/en
Application granted granted Critical
Publication of CA1010560A publication Critical patent/CA1010560A/en
Expired legal-status Critical Current

Links

CA200,764A 1974-05-24 1974-05-24 Pay television system using reference pulse and video inversion Expired CA1010560A (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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