US5046090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recorded medium for video control system
Assignee: Verizon Laboratories Inc
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Filing: 1990-03-29
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Granted: 1991-09-03
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Expires: 2010-03-29
Abstract
Abstract A video recording medium storing a video program includes a series of television fields including a first field containing both a random digital code encrypted according to a code encryption key and program identification data, and a second field containing an unintelligible video signal previously transformed from an intelligible video signal according to the random digital code.
Inventors
- 👤 Stephen S. Walker
- 👤 Clarence M. Sidlo
- 👤 Melvin J. Teare
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:30
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04N7/1675; H04N21/00; H04N21/20; H04N21/25; H04N21/254; H04N21/2543; H04N21/40; H04N21/43; H04N21/432; H04N21/4325; H04N21/433; H04N21/4334; H04N21/44; H04N21/4405; H04N21/47; H04N21/472; H04N21/60; H04N21/63; H04N21/633; H04N21/6332; H04N21/6334; H04N21/63345; H04N21/65; H04N21/658; H04N21/6581; H04N7/162; H04N7/165
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A video recording medium storing a video program including a series of television fields containing both a random digital code encrypted according to one of a plurality of code encryption keys and program identification data, and an unintelligible video signal previously transformed from an intelligible video signal according to said random digital code, and wherein a desired code encryption key is selected from said plurality of code encryption keys in accordance with code encryption key identification data corresponding to the random digital code encrypted with said desired code encryption key.
Claim 2
Dependent Claim
90 words
A video recording medium storing a video program including a series of television fields containing both a random digital code encrypted according to one of a plurality of code encryption keys and program identification data, and an unintelligible video signal previously transformed from an intelligible video signal according to said random digital code, and wherein a desired code encryption key is selected from said plurality of code encryption keys in accordance with code encryption key identification data corresponding to the random digital code encrypted with said desired code encryption key.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-09-02 | 1995-03-04 | 1995-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-09-02 | 1999-03-04 | 1999-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-09-02 | 2003-03-04 | 2003-09-03 | $7700.00 | Window Closed / Lapsed |