US5802174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Data recording medium
Assignee: Sony Corp
•
Filing: 1996-06-27
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Granted: 1998-09-01
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Expires: 2016-06-27
Abstract
Abstract An optical disk D is composed of a first recording layer L 1 and a second recording layer L 2 each for two recording formats. Encrypted data is recorded on the first recording layer L 1 . Encrypting key data is recorded on the second recording layer L 2 . The encrypting key data is used for decoding the encrypted data. This recording makes easy reproduction of the recorded data quite difficult. If data recorded on a bit-formed portion may be reproduced by any means, the data signal recorded on the optical disk cannot be easily reproduced.
Inventors
- 👤 Yoichiro Sako
- 👤 Hideo Owa
- 👤 Yoshitomo Osawa
- 👤 Akira Kurihara
- 👤 Isao Kawashima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:59
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/007; G11B7/00736; G11B27/00; G11B27/36; G11B19/00; G11B19/02; G11B19/12; G11B20/00; G11B20/00086; G11B20/0021; G11B20/00217; G11B20/00253; G11B20/00297; G11B20/00318; G11B20/00413; G11B20/00485; G11B20/00492; G11B20/00528; G11B20/00557; G11B7/004; G11B7/0045; G11B7/005; G06; G06F; G06F2211/00; G06F2211/007; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10584; G11B11/10595; G11B11/10597; G11B2007/0003; G11B2007/0009; G11B2007/0013; G11B2220/00; G11B2220/20; G11B2220/23; G11B2220/235; G11B7/24; G11B7/2403; G11B7/24035; G11B7/24038
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
59 words
A medium for recording data comprising: a plurality of working areas, at least a first of said working areas being adapted to record encrypted data in a first recording format, at least a second of said working areas being adapted to record at least part of key data used for decoding said encrypted data in a second recording format.
Claim 2
Independent Claim
59 words
A medium for recording data comprising: a plurality of working areas, at least a first of said working areas being adapted to record encrypted data in a first recording format, at least a second of said working areas being adapted to record at least part of key data used for decoding said encrypted data in a second recording format.
Claim 3
Independent Claim
39 words
A medium for recording data comprising: at least a first recording layer adapted to record encrypted data; and at least a second recording layer adapted to record at least part of key data used for decoding said encrypted data.
Claim 4
Independent Claim
39 words
A medium for recording data comprising: at least a first recording layer adapted to record encrypted data; and at least a second recording layer adapted to record at least part of key data used for decoding said encrypted data.
Claim 5
Dependent Claim
35 words
The medium for recording data as claimed in claim 2, wherein said first recording layer includes a predetermined area; and said second recording layer being adapted to record data without reference to said predetermined area.
Claim 6
Independent Claim
62 words
A medium for recording data comprising: a plurality of recording areas, at least a first of said recording areas being adapted to record data in a first recording format, and at least a second of said recording areas being adapted to record data in a second recording format, data to be recorded extending over at least said first and second recording areas.
Claim 7
Independent Claim
62 words
A medium for recording data comprising: a plurality of recording areas, at least a first of said recording areas being adapted to record data in a first recording format, and at least a second of said recording areas being adapted to record data in a second recording format, data to be recorded extending over at least said first and second recording areas.
Claim 8
Independent Claim
38 words
A medium for recording data comprising: a plurality of recording layers, each of said recording layers being adapted to record data, wherein data to be recorded on said medium extends over at least two of said recording layers.
Claim 9
Independent Claim
38 words
A medium for recording data comprising: a plurality of recording layers, each of said recording layers being adapted to record data, wherein data to be recorded on said medium extends over at least two of said recording layers.
Claim 10
Dependent Claim
39 words
The medium for recording data as claimed in claim 5, wherein a first of said recording layers includes a predetermined area; and a second of said recording layers being adapted to record data without reference to said predetermined area.
Claim 11
Independent Claim
66 words
A method for recording data on a data recording medium having at least two recording areas adapted to record data in at least two recording formats, comprising the steps of: recording encrypted data on one of said at least two recording areas; and recording at least part of key data used for decoding said encrypted data on a second of said at least two recording areas.
Claim 12
Independent Claim
66 words
A method for recording data on a data recording medium having at least two recording areas adapted to record data in at least two recording formats, comprising the steps of: recording encrypted data on one of said at least two recording areas; and recording at least part of key data used for decoding said encrypted data on a second of said at least two recording areas.
Claim 13
Independent Claim
61 words
A method for recording data on a data recording medium having at least two recording layers adapted to record data thereon, comprising the steps of: recording encrypted data on one of said at least two recording layers; and recording at least part of key data used for decoding said encrypted data on a second of said at least two recording areas.
Claim 14
Independent Claim
61 words
A method for recording data on a data recording medium having at least two recording layers adapted to record data thereon, comprising the steps of: recording encrypted data on one of said at least two recording layers; and recording at least part of key data used for decoding said encrypted data on a second of said at least two recording areas.
Claim 15
Dependent Claim
35 words
The method for recording data as claimed in claim 8, wherein said one recording layer includes a predetermined area; and said second recording layer being adapted to record data without reference to said predetermined area.
Claim 16
Independent Claim
50 words
A method for recording data on a data recording medium having a plurality of recording areas each being adapted to record data in one of at least two recording formats, comprising the step of: recording data over at least two of said plurality of recording areas in different recording formats.
Claim 17
Independent Claim
50 words
A method for recording data on a data recording medium having a plurality of recording areas each being adapted to record data in one of at least two recording formats, comprising the step of: recording data over at least two of said plurality of recording areas in different recording formats.
Claim 18
Independent Claim
35 words
A method for recording data on a data recording medium having at least two recording layers adapted to record data thereon, comprising the step of: recording data over at least two of said recording layers.
Claim 19
Independent Claim
35 words
A method for recording data on a data recording medium having at least two recording layers adapted to record data thereon, comprising the step of: recording data over at least two of said recording layers.
Claim 20
Dependent Claim
38 words
The method for recording data as claimed in claim 11, wherein a first of said recording layers includes a predetermined area; a second of said recording layers being adapted to record data without reference to said predetermined area.
Claim 21
Independent Claim
78 words
A method for reproducing data from a data recording medium having a plurality of recording areas each having data recorded thereon in one of at least two recording formats, comprising the steps of: reading encrypted data recorded on one of said plurality of recording areas; reading at least a portion of key data used for decoding said encrypted data from a second of said plurality of recording areas; and decoding said encrypted data based on said key data.
Claim 22
Independent Claim
78 words
A method for reproducing data from a data recording medium having a plurality of recording areas each having data recorded thereon in one of at least two recording formats, comprising the steps of: reading encrypted data recorded on one of said plurality of recording areas; reading at least a portion of key data used for decoding said encrypted data from a second of said plurality of recording areas; and decoding said encrypted data based on said key data.
Claim 23
Independent Claim
61 words
A method for reproducing data from a data recording medium having at least two recording layers, comprising the steps of: reading encrypted data recorded on one of said recording layers; reading at least a portion of key data used for decoding said encrypted data from a second of said recording layers; and decoding said encrypted data based on said key data.
Claim 24
Independent Claim
61 words
A method for reproducing data from a data recording medium having at least two recording layers, comprising the steps of: reading encrypted data recorded on one of said recording layers; reading at least a portion of key data used for decoding said encrypted data from a second of said recording layers; and decoding said encrypted data based on said key data.
Claim 25
Independent Claim
60 words
A method for reproducing data from a data recording medium having a plurality of recording areas each having data recorded thereon in one of at least two recording formats, comprising the steps of reading data recorded over at least two of said plurality of recording areas; and synthesizing data read from said at least two recording areas with each other.
Claim 26
Independent Claim
60 words
A method for reproducing data from a data recording medium having a plurality of recording areas each having data recorded thereon in one of at least two recording formats, comprising the steps of reading data recorded over at least two of said plurality of recording areas; and synthesizing data read from said at least two recording areas with each other.
Claim 27
Independent Claim
47 words
A method for reproducing data from a data recording medium having at least two recording layers, comprising the steps of: reading data recorded over said at least two recording layers; and synthesizing said data read from each of said at least two recording layers with each other.
Claim 28
Independent Claim
47 words
A method for reproducing data from a data recording medium having at least two recording layers, comprising the steps of: reading data recorded over said at least two recording layers; and synthesizing said data read from each of said at least two recording layers with each other.
Claim 29
Independent Claim
96 words
An apparatus for recording data on a data recording medium having a plurality of recording areas, at least a first of said recording areas being adapted to record data in a first recording format, and at least a second of said recording areas being adapted to record data in a second recording format, comprising: means for recording encrypted data on at least one of said plurality of recording areas; and means for recording at least part of key data used for decoding said encrypted data on at least another one of said plurality of recording areas.
Claim 30
Independent Claim
96 words
An apparatus for recording data on a data recording medium having a plurality of recording areas, at least a first of said recording areas being adapted to record data in a first recording format, and at least a second of said recording areas being adapted to record data in a second recording format, comprising: means for recording encrypted data on at least one of said plurality of recording areas; and means for recording at least part of key data used for decoding said encrypted data on at least another one of said plurality of recording areas.
Claim 31
Independent Claim
57 words
An apparatus for recording data on a data recording medium having at least two recording layers, comprising: means for recording encrypted data on one of said at least two recording layers; and means for recording at least part of key data used for decoding said encrypted data on another one of said at least two recording areas.
Claim 32
Independent Claim
57 words
An apparatus for recording data on a data recording medium having at least two recording layers, comprising: means for recording encrypted data on one of said at least two recording layers; and means for recording at least part of key data used for decoding said encrypted data on another one of said at least two recording areas.
Claim 33
Dependent Claim
33 words
The data recording apparatus as claimed in claim 18, wherein said one recording layer includes a predetermined area; said other recording layer being adapted to record data without reference to said predetermined area.
Claim 34
Independent Claim
72 words
An apparatus for recording data on a data recording medium having at least two recording areas corresponding to at least two recording formats, comprising: means for recording data in one of said at least two recording areas in a first of said at least two recording formats; and means for recording data in a second of said at least two recording areas in a second of said at least two recording formats.
Claim 35
Independent Claim
72 words
An apparatus for recording data on a data recording medium having at least two recording areas corresponding to at least two recording formats, comprising: means for recording data in one of said at least two recording areas in a first of said at least two recording formats; and means for recording data in a second of said at least two recording areas in a second of said at least two recording formats.
Claim 36
Independent Claim
44 words
An apparatus for recording data on a data recording medium having at least two recording layers, comprising: means for recording data over at least two recording layers; and alternating means for alternating which of said at least two recording layers data is recorded to.
Claim 37
Independent Claim
44 words
An apparatus for recording data on a data recording medium having at least two recording layers, comprising: means for recording data over at least two recording layers; and alternating means for alternating which of said at least two recording layers data is recorded to.
Claim 38
Dependent Claim
34 words
The data recording apparatus as claimed in claim 21, wherein a first recording layer includes a predetermined area; and a second recording layer being adapted to record data without reference to said predetermined area.
Claim 39
Independent Claim
85 words
An apparatus for reproducing data from a data recording medium having a plurality of recording areas each having data recorded thereon in one of at least two recording formats, comprising: means for reading encrypted data from at least one of said plurality of recording areas; means for reading at least a portion of key data used for decoding said encrypted data from at least a second one of said plurality of recording areas; and means for decoding said encrypted data based on said key data.
Claim 40
Independent Claim
85 words
An apparatus for reproducing data from a data recording medium having a plurality of recording areas each having data recorded thereon in one of at least two recording formats, comprising: means for reading encrypted data from at least one of said plurality of recording areas; means for reading at least a portion of key data used for decoding said encrypted data from at least a second one of said plurality of recording areas; and means for decoding said encrypted data based on said key data.
Claim 41
Independent Claim
65 words
An apparatus for reproducing data from a data recording medium having at least two recording layers, comprising: means for reading encrypted data from at least a first one of said recording layers; means for reading key data used to encrypt said encrypted data from at least a second one of said recording layers; and means for decoding said encrypted data based on said key data.
Claim 42
Independent Claim
65 words
An apparatus for reproducing data from a data recording medium having at least two recording layers, comprising: means for reading encrypted data from at least a first one of said recording layers; means for reading key data used to encrypt said encrypted data from at least a second one of said recording layers; and means for decoding said encrypted data based on said key data.
Claim 43
Dependent Claim
33 words
The data reproducing apparatus as claimed in claim 24, wherein said first recording layer includes a predetermined area; said second recording layer being adapted to record data without reference to said predetermined area.
Claim 44
Independent Claim
64 words
An apparatus for reproducing data from a data recording medium having a plurality of recording areas each having data recorded thereon in one of at least two recording formats, comprising: means for reading recorded data which extends over at least two of said recording areas; and means for synthesizing said data read from each of said at least two recording areas with each other.
Claim 45
Independent Claim
64 words
An apparatus for reproducing data from a data recording medium having a plurality of recording areas each having data recorded thereon in one of at least two recording formats, comprising: means for reading recorded data which extends over at least two of said recording areas; and means for synthesizing said data read from each of said at least two recording areas with each other.
Claim 46
Independent Claim
51 words
An apparatus for reproducing data from a data recording medium having at least two recording layers, comprising: means for reading recorded data which extends over at least two of said recording layers; and means for synthesizing said data read from each of said at least two recording layers with each other.
Claim 47
Independent Claim
51 words
An apparatus for reproducing data from a data recording medium having at least two recording layers, comprising: means for reading recorded data which extends over at least two of said recording layers; and means for synthesizing said data read from each of said at least two recording layers with each other.
Claim 48
Dependent Claim
34 words
The data reproducing apparatus as claimed in claim 27, wherein a first recording layer includes a predetermined area; and a second recording layer being adapted to record data without reference to said predetermined area.
References Cited (Backward Citations)
EP0273384A1
Cited
US5150339A
Cited
EP0426409A2
Cited
EP0508762A2
Cited
EP0545472A1
Cited
US5371792A
Cited
EP0565281A2
Cited
EP0628952A2
Cited
EP0634741A1
Cited
US5596639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-08-31 | 2002-03-02 | 2002-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-08-31 | 2006-03-02 | 2006-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-08-31 | 2010-03-02 | 2010-09-01 | $7700.00 | Window Closed / Lapsed |