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 Title: |
US6208598:
Anti-counterfeit compact disc
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Sinquin, Patrice; Kibbutz Galuyot, Israel
Selve, Philippe; Tel Aviv, Israel
Alcalay, Ran; Tel Aviv, Israel
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| Assignee: |
Midbar Tech (1998) Ltd., Tel Aviv, Israel
other patents from MIDBAR TECH (1998) LTD. (780882) (approx. 4)
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| Published / Filed: |
2001-03-27
/ 1999-01-13
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| Application Number: |
US1999000229812
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| IPC Code: |
Advanced:
G11B 20/00;
G11B 20/18;
Core:
more...
IPC-7:
G11B 5/09;
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| ECLA Code: |
G11B20/00P;
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| U.S. Class: |
Current:
369/047.12;
369/124.05;
369/124.07;
G9B/020.002;
Original:
369/047.12;
369/124.05;
369/124.07;
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| Field of Search: |
369/047,48,49,53,54,58,59,84,85,124.05,124.07
360/015,25,27,60
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| Priority Number: |
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| Abstract: |
A method for recording audio data onto a compact disc so as to discourage unauthorized copying thereof, the method including sampling a source audio data stream to determine at least one source audio data portion thereof the a derivative function of a sequence of samples of the source audio data portion is substantially constant, modifying the source audio data stream by substituting the source audio data portion with a substitute audio data portion, recording the modified audio data stream into at least one frame of the compact disc the frame has a P-channel, and setting the value of the P-channel that corresponds to the substitute audio data portion to 1.
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| Attorney, Agent or Firm: |
Ladas and Parry ;
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| Primary / Asst. Examiners: |
Huber, Paul W.;
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| INPADOC Legal Status: |
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| Family: |
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First Claim:
Show all 5 claims |
What is claimed is:
1. A compact disc comprising:
- at least one frame comprising:
- modified audio data derived from a source audio data stream having at least one source audio data portion thereof wherein a derivative function of a sequence of samples of said source audio data portion is substantially constant and wherein said source audio data stream has been modified by substituting said source audio data portion with a substitute audio data portion; and
- a P-channel that corresponds to said substitute audio data portion wherein the P-channel has a value of 1.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 2 U.S. patent(s) that reference this one
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