US5587984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hologram printed on optical recording medium for copy protection
Assignee: Sony Corp
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Filing: 1995-09-08
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Granted: 1996-12-24
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Expires: 2015-09-08
Abstract
Abstract An optical recording medium is disclosed, in which holograms for recording medium discrimination are recorded in a recording medium discrimination information recording area provided on the side of an inner circle within an information recording area on a compact disc. Thus, it is difficult to copy an original optical recording medium to produce a fake product, and it is possible to distinguish the original optical recording medium from the fake product by external appearance.
Inventors
- 👤 Hideo Owa
- 👤 Seiji Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:19
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/28; G11B23/283; G11B23/284; G11B20/00; G11B20/00086; G11B20/00094; G11B20/00123; G11B20/00876; G11B23/38; G11B23/40; G03; G03H; G03H1/00; G03H1/0005; G03H1/0011; G03H2270/00; G03H2270/20; G03H2270/22; G11B7/00; G11B7/24; G11B7/26; G11B7/263
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
36 words
An optical recording medium having signals optically recorded therein, the optical recording medium comprising a hologram for recording medium discrimination recorded in an area other than an information recording area in which information signals are recorded.
Claim 2
Dependent Claim
36 words
An optical recording medium having signals optically recorded therein, the optical recording medium comprising a hologram for recording medium discrimination recorded in an area other than an information recording area in which information signals are recorded.
Claim 3
Dependent Claim
53 words
The optical recording medium as claimed in claim 1, wherein the hologram is recorded in the optical recording medium by processes of cutting the hologram on a base plate of the recording medium by laser and producing a stamper from the base plate of the recording medium on which the hologram is cut.
Claim 4
Dependent Claim
26 words
The optical recording medium as claimed in claim 2, wherein the hologram is recorded in a form of two-dimensional signal pattern in the optical recording medium.
Claim 5
Dependent Claim
37 words
The optical recording medium as claimed in claim 2, wherein the hologram is identified using a diffraction image produced by radiating a light emitted from optical means other than an optical pickup for reproducing the information signals.
Claim 6
Dependent Claim
31 words
The optical recording medium as claimed in claim 2, wherein plural holograms are provided in the area other than the information recording area, the holograms being discontinuously located at predetermined intervals.
Claim 7
Dependent Claim
20 words
The optical recording medium as claimed in claim 5, wherein the plural holograms are located at intervals of 2-5 mm.
Claim 8
Dependent Claim
28 words
The optical recording medium as claimed in claim 2, wherein the hologram is recorded in a recording/reproducing mode which differs from a recording/reproducing mode of the information signals.
Claim 9
Dependent Claim
39 words
The optical recording medium as claimed in claim 7, wherein the hologram is recorded in the optical recording medium in a CAV mode and wherein the information signals are recorded in the optical recording medium in a CLV mode.
Claim 10
Dependent Claim
26 words
The optical recording medium as claimed in claim 2, wherein the hologram is recorded as a binary pattern with random distribution in the optical recording medium.
Claim 11
Dependent Claim
78 words
A signal recording method for recording signals in an optical recording medium, the method comprising: a first step of receiving information signals to be recorded in the optical recording medium; a second step of receiving a hologram for discriminating the optical recording medium; a third step of recording the information signal in an information recording area of the optical recording medium; and a fourth step of recording the hologram in an area other than the information recording area.
Claim 12
Dependent Claim
78 words
A signal recording method for recording signals in an optical recording medium, the method comprising: a first step of receiving information signals to be recorded in the optical recording medium; a second step of receiving a hologram for discriminating the optical recording medium; a third step of recording the information signal in an information recording area of the optical recording medium; and a fourth step of recording the hologram in an area other than the information recording area.
Claim 13
Dependent Claim
47 words
The signal recording method as claimed in claim 10, wherein the fourth step comprises a step of cutting the hologram on a base plate of the recording medium by laser, and a step of producing a stamper from the base plate on which the hologram is cut.
Claim 14
Dependent Claim
20 words
The signal recording method as claimed in claim 11, wherein the hologram is in a form of two-dimensional signal pattern.
Claim 15
Dependent Claim
39 words
The signal recording method as claimed in claim 11, wherein the fourth step further comprises a step of, when plural holograms are received, locating the holograms discontinuously at predetermined intervals in the area other than the information recording area.
Claim 16
Dependent Claim
27 words
The signal recording method as claimed in claim 13, wherein in the step of locating the holograms, the plural holograms are located at intervals of 2-5 mm.
Claim 17
Dependent Claim
43 words
The signal recording method as claimed in claim 11, wherein in the step of cutting the hologram, the hologram is cut on the base plate of the recording medium in a recording/reproducing mode which differs from a recording/reproducing mode of the information signals.
Claim 18
Dependent Claim
39 words
The signal recording method as claimed in claim 15, wherein the hologram is recorded in the optical recording medium in a CAV mode and wherein the information signals are recorded in the optical recording medium in a CLV mode.
Claim 19
Dependent Claim
28 words
The signal recording method as claimed in claim 11, wherein the third step further comprises a step of converting the hologram to a binary pattern with random distribution.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-12-24 | 2000-06-24 | 2000-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-24 | 2004-06-24 | 2004-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-24 | 2008-06-24 | 2008-12-24 | $7700.00 | Window Closed / Lapsed |