US6028932A
Expired / Lapsed
US
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Copy prevention method and apparatus for digital video system
Assignee: LG Electronics Inc
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Filing: 1998-04-01
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Granted: 2000-02-22
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Expires: 2018-04-01
Abstract
Abstract A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream; (b) decrypting and transmitting the bit stream to which the header area is added; (c) detecting a key field of the decrypted and transmitted bit stream and detecting copy prevention information; and (d) encrypting the bit stream according to information detected from step (c) and recording it on tape.
Inventors
- 👤 Tae Joon Park
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:28
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/913; H04N2005/91307; H04N2005/91328; H04N2005/91357; H04N2005/91364; H04N9/00; H04N9/79; H04N9/80; H04N9/804; H04N9/8042; H04N9/806; H04N9/8063; H04N9/82; H04N9/8205
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
71 words
A copy prevention method for a digital video system comprising the steps of: (a) detecting key information from transmitted digital video bit streams; (b) decoding said copy prevention information from said transmitted digital video bit streams; (c) encrypting said digital video bit streams based on said decoded copy prevention information; and (d) recording said key information and said copy prevention information and said digital video bit streams to a digital medium.
Claim 2
Dependent Claim
71 words
A copy prevention method for a digital video system comprising the steps of: (a) detecting key information from transmitted digital video bit streams; (b) decoding said copy prevention information from said transmitted digital video bit streams; (c) encrypting said digital video bit streams based on said decoded copy prevention information; and (d) recording said key information and said copy prevention information and said digital video bit streams to a digital medium.
Claim 3
Dependent Claim
28 words
The copy prevention method for a digital video system as claimed in claim 1, further comprising the step of: encoding said key information after the detecting step (a).
Claim 4
Dependent Claim
33 words
The copy prevention method for a digital video system as claimed in claim 1, wherein the recording step (d) further comprises recording said key information on a start area of said digital medium.
Claim 5
Dependent Claim
37 words
The copy prevention method for a digital video system as claimed in claim 1, wherein the encrypting step (c) further comprises encrypting said digital video bit streams every predetermined period based on said decoded copy prevention information.
Claim 6
Dependent Claim
22 words
The copy prevention method for a digital video system as claimed in claim 4, wherein said predetermined period is a GOP block.
Claim 7
Dependent Claim
80 words
A copy prevention method for a digital video system comprising the steps of: (a) reproducing digital video bit streams recorded on a digital medium; (b) decoding key information which is a portion of said digital bit streams to determine decryption of said digital video bit streams; (c) decrypting said digital video bit streams based on said decoded key information; and (d) transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 8
Dependent Claim
80 words
A copy prevention method for a digital video system comprising the steps of: (a) reproducing digital video bit streams recorded on a digital medium; (b) decoding key information which is a portion of said digital bit streams to determine decryption of said digital video bit streams; (c) decrypting said digital video bit streams based on said decoded key information; and (d) transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 9
Dependent Claim
33 words
The copy prevention method for a digital video system as claimed in claim 6, wherein the decoding step (b) further comprises recording said key information on a start area of said digital medium.
Claim 10
Dependent Claim
36 words
The copy prevention method for a digital video system as claimed in claim 6, wherein the decrypting step (c) further comprises decrypting said digital video bit streams every predetermined period based on said decoded key information.
Claim 11
Dependent Claim
22 words
The copy prevention method for a digital video system as claimed in claim 8, wherein said predetermined period is a GOP block.
Claim 12
Dependent Claim
78 words
A copy prevention method for a digital video system comprising the steps of: (a) reproducing digital bit streams recorded on a digital medium; (b) decoding key information which is a portion of said digital bit streams, to determine operation of said digital video system; (c) decrypting said digital video bit streams based on said decoded key information; and (d) transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 13
Dependent Claim
78 words
A copy prevention method for a digital video system comprising the steps of: (a) reproducing digital bit streams recorded on a digital medium; (b) decoding key information which is a portion of said digital bit streams, to determine operation of said digital video system; (c) decrypting said digital video bit streams based on said decoded key information; and (d) transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 14
Dependent Claim
100 words
A copy prevention method for a digital video system comprising the steps of: (a) detecting copy prevention information from reproduced digital video bit streams, wherein said copy prevention information having bit streams related to no copy information, one copy permit information and decryption of said digital video bit streams; (b) decoding one of said copy prevention information to determine decryption of said digital video bit streams; (c) decrypting said digital video bit streams based on said decoded key information; and (d) transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 15
Dependent Claim
100 words
A copy prevention method for a digital video system comprising the steps of: (a) detecting copy prevention information from reproduced digital video bit streams, wherein said copy prevention information having bit streams related to no copy information, one copy permit information and decryption of said digital video bit streams; (b) decoding one of said copy prevention information to determine decryption of said digital video bit streams; (c) decrypting said digital video bit streams based on said decoded key information; and (d) transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 16
Dependent Claim
93 words
A copy prevention method for a digital video system comprising the steps of: (a) detecting a copy prevention information from transmitted digital video bit streams, wherein said copy prevention information having bit streams related to no copy information, one copy permit information and decryption of said digital video bit streams; (b) decoding at least one of said copy prevention information to determine recording of said digital video bit streams; and (c) recording new copy prevention information and said digital video bit streams to a digital medium based on said decoded copy prevention information.
Claim 17
Dependent Claim
93 words
A copy prevention method for a digital video system comprising the steps of: (a) detecting a copy prevention information from transmitted digital video bit streams, wherein said copy prevention information having bit streams related to no copy information, one copy permit information and decryption of said digital video bit streams; (b) decoding at least one of said copy prevention information to determine recording of said digital video bit streams; and (c) recording new copy prevention information and said digital video bit streams to a digital medium based on said decoded copy prevention information.
Claim 18
Dependent Claim
81 words
A copy prevention apparatus for a digital video system comprising: key detecting means for detecting key information from transmitted digital video bit streams; copy prevention detection means for detecting and decoding said copy prevention information from said transmitted digital video bit streams; encrypting means for encrypting said digital video bit streams based on said decoded copy prevention information; and recording means for recording said key information and said copy prevention information and said digital video bit streams to a digital medium.
Claim 19
Dependent Claim
81 words
A copy prevention apparatus for a digital video system comprising: key detecting means for detecting key information from transmitted digital video bit streams; copy prevention detection means for detecting and decoding said copy prevention information from said transmitted digital video bit streams; encrypting means for encrypting said digital video bit streams based on said decoded copy prevention information; and recording means for recording said key information and said copy prevention information and said digital video bit streams to a digital medium.
Claim 20
Dependent Claim
23 words
The copy prevention apparatus for a digital video system as claimed in claim 13, further comprising: encoding means for encoding said key information.
Claim 21
Dependent Claim
28 words
The copy prevention apparatus for a digital video system as claimed in claim 13, wherein said key information is recorded on a start area of said digital medium.
Claim 22
Dependent Claim
32 words
The copy prevention apparatus for a digital video system as claimed in claim 13, wherein said digital video bit streams is encrypted every predetermined period based on said decoded copy prevention information.
Claim 23
Dependent Claim
22 words
The copy prevention apparatus for a digital video system as claimed in claim 16, wherein said predetermined period is a GOP block.
Claim 24
Dependent Claim
84 words
A copy prevention apparatus for a digital video system comprising: reproduction means for reproducing digital video bit streams recorded on a digital medium; means for decoding key information which is a portion of said digital bit streams to determine decryption of said digital video bit streams; decryption means for decrypting said digital video bit streams based on said decoded key information; and transmission means for transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 25
Dependent Claim
84 words
A copy prevention apparatus for a digital video system comprising: reproduction means for reproducing digital video bit streams recorded on a digital medium; means for decoding key information which is a portion of said digital bit streams to determine decryption of said digital video bit streams; decryption means for decrypting said digital video bit streams based on said decoded key information; and transmission means for transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 26
Dependent Claim
29 words
The copy prevention apparatus for a digital video system as claimed in claim 18, wherein said decoded key information is recorded on a start area of said digital medium.
Claim 27
Dependent Claim
31 words
The copy prevention apparatus for a digital video system as claimed in claim 18, wherein said digital video bit streams is decrypted every predetermined period based on said decoded key information.
Claim 28
Dependent Claim
22 words
The copy prevention apparatus for a digital video system as claimed in claim 20, wherein said predetermined period is a GOP block.
Claim 29
Dependent Claim
82 words
A copy prevention apparatus for a digital video system comprising: reproduction means for reproducing digital bit streams recorded on a digital medium; means for decoding key information which is a portion of said digital bit streams, to determine operation of said digital video system; decryption means for decrypting said digital video bit streams based on said decoded key information; and transmission means for transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 30
Dependent Claim
82 words
A copy prevention apparatus for a digital video system comprising: reproduction means for reproducing digital bit streams recorded on a digital medium; means for decoding key information which is a portion of said digital bit streams, to determine operation of said digital video system; decryption means for decrypting said digital video bit streams based on said decoded key information; and transmission means for transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 31
Dependent Claim
106 words
A copy prevention apparatus for a digital video system comprising: copy protection detection means for detecting copy prevention information from reproduced digital video bit streams, wherein said copy prevention information having bit streams related to no copy information, one copy permit information and decryption of said digital video bit streams; means for decoding one of said copy prevention information to determine decryption of said digital video bit streams; decryption means for decrypting said digital video bit streams based on said decoded key information; and transmission means for transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 32
Dependent Claim
106 words
A copy prevention apparatus for a digital video system comprising: copy protection detection means for detecting copy prevention information from reproduced digital video bit streams, wherein said copy prevention information having bit streams related to no copy information, one copy permit information and decryption of said digital video bit streams; means for decoding one of said copy prevention information to determine decryption of said digital video bit streams; decryption means for decrypting said digital video bit streams based on said decoded key information; and transmission means for transmitting at least said digital video bit streams to at least one of a monitor and a digital recorder.
Claim 33
Dependent Claim
97 words
A copy prevention apparatus for a digital video system comprising: copy protection detection means for detecting a copy prevention information from transmitted digital video bit streams, wherein said copy prevention information having bit streams related to no copy information, one copy permit information and decryption of said digital video bit streams; means for decoding at least one of said copy prevention information to determine recording of said digital video bit streams; and recording means for recording new copy prevention information and said digital video bit streams to a digital medium based on said decoded copy prevention information.
Claim 34
Dependent Claim
97 words
A copy prevention apparatus for a digital video system comprising: copy protection detection means for detecting a copy prevention information from transmitted digital video bit streams, wherein said copy prevention information having bit streams related to no copy information, one copy permit information and decryption of said digital video bit streams; means for decoding at least one of said copy prevention information to determine recording of said digital video bit streams; and recording means for recording new copy prevention information and said digital video bit streams to a digital medium based on said decoded copy prevention information.
References Cited (Backward Citations)
US4937679A
Cited
US5054064A
Cited
US5303294A
Cited
US5406625A
Cited
US5477276A
Cited
US5315448A
Cited
US5757910A
Cited
US5546461A
Cited
US5576843A
Cited
US5513260A
Cited
US5757909A
Cited
US5689559A
Cited
US5778064A
Cited
US5832084A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-02-21 | 2003-08-23 | 2004-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-02-21 | 2007-08-23 | 2008-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-02-21 | 2011-08-23 | 2012-02-22 | $7700.00 | Window Closed / Lapsed |