US5428598A
Expired / Lapsed
US
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Record carrier with copy bits
Assignee: US Philips Corp
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Filing: 1993-09-01
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Granted: 1995-06-27
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Expires: 2013-09-01
Abstract
Abstract Methods of and information recording devices for recording and/or inhibiting recording of a signal including copy bits on a record carrier, and a record carrier including that signal. The signal has successive information frames including main data and subcode data. The subcode data of the information frames make up successive subcode frames having copy bits with logic values which alternate among the subcode frames in accordance with a predetermined pattern. Each subcode frame has at least one copy bit. In one of the embodiments, the signal is received and a determination is made whether to inhibit its recording on the basis of the predetermined pattern exhibited by the logic values of the copy bits contained in the subcode frames. In another embodiment the subcode frames are replaced by substitute subcode frames having copy bits with logic values which alternate among the substitute subcode frames in accordance with a selected pattern prior to recording of the signal. The predetermined and selected patterns are indicative of a particular characteristic of the main data (e.g., whether the main data is copy protected).
Inventors
- 👤 Hindrik Veldhuis
- 👤 Rudolf Roth
- 👤 Jacobus P. J. Heemskerk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:57
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/00086; G11B27/00; G11B27/02; G11B27/031; G11B27/034; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3063; G11B7/00; G11B7/28; G06; G06F; G06F21/00; G06F21/10; G06F21/109; G06F2211/00; G06F2211/007; G11B20/10527; G11B2020/10537; G11B2020/10592; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/215; G11B2220/218; G11B2220/25; G11B2220/2537; G11B2220/2545; G11B2220/90; G11B2220/91; G11B2220/913; G11B27/032
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
138 words
A copy protected record carrier having digital information recorded therein as successive information frames, each information frame including main data and subcode data, the subcode data of successive information frames forming consecutive subcode frames, each subcode frame including the subcode data of a predetermined number of successive information frames, the record carrier being characterized in that the subcode data in each subcode frame includes in a predetermined position thereof at least one bit which serves as a copy bit, and the copy bits have logic values which alternate among the subcode frames in accordance with a predetermined pattern which signifies that the main data is copy protected and, as such, will result in copying of the main data being inhibited, Whereby the copy bits in at least two of the subcode frames have logic values which are different.
Claim 2
Dependent Claim
138 words
A copy protected record carrier having digital information recorded therein as successive information frames, each information frame including main data and subcode data, the subcode data of successive information frames forming consecutive subcode frames, each subcode frame including the subcode data of a predetermined number of successive information frames, the record carrier being characterized in that the subcode data in each subcode frame includes in a predetermined position thereof at least one bit which serves as a copy bit, and the copy bits have logic values which alternate among the subcode frames in accordance with a predetermined pattern which signifies that the main data is copy protected and, as such, will result in copying of the main data being inhibited, Whereby the copy bits in at least two of the subcode frames have logic values which are different.
Claim 3
Dependent Claim
30 words
The record carrier as claimed in claim 1, wherein the pattern is indicative of a generation number corresponding to the number of time the main data has previously been copied.
Claim 4
Dependent Claim
49 words
The record carrier as claimed in claim 2, wherein said pattern is periodic, and the ratio of the number of copy bits of a first logic value in a period of the pattern to the total number of copy bits in the period is indicative of the generation number.
Claim 5
Dependent Claim
19 words
The record carrier as claimed in claim 1, wherein the digital information is in a standardized Compact Disc format.
Claim 6
Dependent Claim
145 words
A copy protected record carrier having digital information physically included in the structure of the record carrier as successive information frames, each information frame including main data and subcode data, the subcode data of successive information frames forming consecutive subcode frames, each subcode frame including the subcode data of a predetermined number of successive information frames, the record carrier being characterized in that the subcode data in each subcode frame includes in a predetermined position thereof at least one bit which serves as a copy bit, and the copy bits have logic values which alternate among the subcode frames in accordance with a predetermined pattern which signifies that the main data is copy protected and, as such, will result in copying of the main data being inhibited, whereby the copy bits in at least two of the subcode frames have logic values which are different.
Claim 7
Dependent Claim
145 words
A copy protected record carrier having digital information physically included in the structure of the record carrier as successive information frames, each information frame including main data and subcode data, the subcode data of successive information frames forming consecutive subcode frames, each subcode frame including the subcode data of a predetermined number of successive information frames, the record carrier being characterized in that the subcode data in each subcode frame includes in a predetermined position thereof at least one bit which serves as a copy bit, and the copy bits have logic values which alternate among the subcode frames in accordance with a predetermined pattern which signifies that the main data is copy protected and, as such, will result in copying of the main data being inhibited, whereby the copy bits in at least two of the subcode frames have logic values which are different.
Claim 8
Dependent Claim
30 words
The record carrier as claimed in claim 5, wherein the pattern is indicative of a generation number corresponding to the number of time the main data has previously been copied.
Claim 9
Dependent Claim
49 words
The record carrier as claimed in claim 6, wherein the pattern is periodic, and the ratio of the number of copy bits of a first logic value in a period of the pattern to the total number of copy bits in the period is indicative of the generation number.
Claim 10
Dependent Claim
20 words
The record carrier as claimed in claim 5, wherein the digital information is recorded in a standardized Compact Disc format.
Claim 11
Dependent Claim
20 words
The record carrier as claimed in claim 5, wherein the digital information is recorded as pits in the record carrier.
Claim 12
Dependent Claim
149 words
A record carrier having a track including indicia therein detectable by a reproducing device, said indicia representing information arranged in successive information frames, each of the successive information frames includes main data and subcode data, the subcode data of successive information frames forming consecutive subcode frames, each of which includes the subcode data of a predetermined number of successive information frames, the record carrier being characterized in that the subcode data in each of the subcode frames includes in a predetermined position thereof at least one bit which serves as a copy bit, and the copy bits have logic values which alternate among the subcode frames in accordance with a predetermined pattern which is indicative of a characteristic of the main data, which characteristic can be detected by a reproducing device, whereby the copy bits in at least two of the subcode frames have logic values which are different.
Claim 13
Dependent Claim
149 words
A record carrier having a track including indicia therein detectable by a reproducing device, said indicia representing information arranged in successive information frames, each of the successive information frames includes main data and subcode data, the subcode data of successive information frames forming consecutive subcode frames, each of which includes the subcode data of a predetermined number of successive information frames, the record carrier being characterized in that the subcode data in each of the subcode frames includes in a predetermined position thereof at least one bit which serves as a copy bit, and the copy bits have logic values which alternate among the subcode frames in accordance with a predetermined pattern which is indicative of a characteristic of the main data, which characteristic can be detected by a reproducing device, whereby the copy bits in at least two of the subcode frames have logic values which are different.
Claim 14
Dependent Claim
30 words
The record carrier as claimed in claim 10, wherein the pattern is indicative of a generation number corresponding to the number of time the main data has previously been copied.
Claim 15
Dependent Claim
49 words
The record carrier as claimed in claim 11, wherein the pattern is periodic, and the ratio of the number of copy bits of a first logic value in a period of the pattern to the total number of copy bits in the period is indicative of the generation number.
Claim 16
Dependent Claim
40 words
The record carrier as claimed in claim 10, wherein the pattern indicates that the main data is copy protected, whereby upon detection by the reproducing device that the record carrier is copy protected, copying of the main data is inhibited.
Claim 17
Dependent Claim
18 words
The record carrier as claimed in claim 10, wherein the indicia is in a standardized Compact Disc format.
Claim 18
Dependent Claim
16 words
The record carrier as claimed in claim 10, wherein the indicia are pits within the track.
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) | 1998-06-26 | 1998-12-26 | 1999-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-26 | 2002-12-26 | 2003-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-26 | 2006-12-26 | 2007-06-27 | $7700.00 | Window Closed / Lapsed |