US5579391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
TV scramble system for preventing illegal reception
Assignee: Sony Corp
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Filing: 1995-05-02
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Granted: 1996-11-26
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Expires: 2015-05-02
Abstract
Abstract A scramble system can effectively prevent a scrambled broadcast from being viewed illegally. In a scramble system in which a video signal scrambled by a scrambling apparatus (10) is descrambled by a decoding apparatus (20), an identification code that specifies the decoding apparatus (20) is inserted into a vertical blanking period of the video signal supplied to the decoding apparatus (20).
Inventors
- 👤 Kiichi Ihara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:36
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/913; H04N7/00; H04N7/16; H04N7/167
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
196 words
A scramble system comprising: a program transmitting apparatus for outputting a video program and ancillary information concerning said video program; a scrambling apparatus for inserting said ancillary information into a vertical blanking period of a video signal transmitted from said program transmitting apparatus and scrambling said video signal together with an audio signal; a transmitting apparatus for transmitting a scrambled signal supplied from said scrambling apparatus as a broadcast wave; a receiving apparatus for receiving and demodulating said broadcast wave transmitted from said transmitting apparatus; a decoding apparatus for inserting an identification code of each of said decoding apparatus into a vertical blanking period of a video signal demodulated by said receiving apparatus, said decoding apparatus comprising a decode condition memory unit, a decode processing unit, and a decode condition setting unit, said decode condition setting unit being responsive to detection of a predetermined relation between a signal generated locally within said decoding apparatus by said decode condition memory unit and a portion of said broadcast wave for generating a signal enabling said decode processing unit to unscramble said demodulated video signal; and a video equipment to which a signal from said decoding apparatus is supplied.
Claim 2
Dependent Claim
196 words
A scramble system comprising: a program transmitting apparatus for outputting a video program and ancillary information concerning said video program; a scrambling apparatus for inserting said ancillary information into a vertical blanking period of a video signal transmitted from said program transmitting apparatus and scrambling said video signal together with an audio signal; a transmitting apparatus for transmitting a scrambled signal supplied from said scrambling apparatus as a broadcast wave; a receiving apparatus for receiving and demodulating said broadcast wave transmitted from said transmitting apparatus; a decoding apparatus for inserting an identification code of each of said decoding apparatus into a vertical blanking period of a video signal demodulated by said receiving apparatus, said decoding apparatus comprising a decode condition memory unit, a decode processing unit, and a decode condition setting unit, said decode condition setting unit being responsive to detection of a predetermined relation between a signal generated locally within said decoding apparatus by said decode condition memory unit and a portion of said broadcast wave for generating a signal enabling said decode processing unit to unscramble said demodulated video signal; and a video equipment to which a signal from said decoding apparatus is supplied.
Claim 3
Dependent Claim
36 words
The scramble system according to claim 1 wherein said scrambling apparatus superimposes said ancillary information upon a predetermined one horizontal line within a vertical blanking period of said video signal supplied from said program transmitting apparatus.
Claim 4
Dependent Claim
36 words
The scramble system according to claim 1 wherein said decoding apparatus superimposes an identification code of each of said decoding apparatus upon a predetermined one horizontal line within the vertical blanking period of said video signal.
Claim 5
Dependent Claim
36 words
The scramble system according to claim 1 further comprising an information detecting apparatus for detecting said identification code or said ancillary information inserted into said predetermined line within the vertical blanking period of said video signal.
Claim 6
Dependent Claim
27 words
The scramble system according to claim 1 further comprising a management apparatus for supplying said scrambling apparatus with information necessary for managing each of said decoding apparatus.
Claim 7
Dependent Claim
54 words
The scramble system according to claim 1 further comprising a management apparatus for supplying said scrambling apparatus with information necessary for managing each of said decoding apparatus and a scrambling apparatus for scrambling information necessary for managing each of said decoding apparatus supplied thereto and supplying the scrambled management information to said transmitting apparatus.
Claim 8
Dependent Claim
22 words
The scramble system according to claim 1 wherein said ancillary information contains an identification code for identifying the video program transmission side.
Claim 9
Dependent Claim
21 words
The scramble system according to claim 1 wherein said ancillary information contains a description of the contents of the video program.
Claim 10
Dependent Claim
19 words
The scramble system according to claim 1 wherein said ancillary information contains a video program transmission time and date.
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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) | 1999-11-26 | 2000-05-27 | 2000-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-26 | 2004-05-27 | 2004-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-26 | 2008-05-27 | 2008-11-26 | $7700.00 | Window Closed / Lapsed |