Digital compact disc player security system reproducing...

Details Digital compact disc player security system reproducing... Digital compact disc player security system reproducing...

G - Physics

11

B

G11B 19/02 (2006.01) G11B 7/013 (2006.01) G11B 20/00 (2006.01) G06F 1/00 (2006.01) G11B 7/007 (2006.01) G11B 7/26 (2006.01)

Patent

CA 2163177

A security system for preventing disc players from being used with unauthorized software is disclosed. The security code is stored through modulating an offset of the physical position of a plurality of data bits from a nominal track position. A two part optical read head provides an RF signal corresponding to the presence of a physical offset modulation. The RF signal is present when there is a physical offset of the data bits defining a first logical state and the absence of the RF signal defines a second logical state. A digital security code is encoded and decoded in this manner. A system for encoding a security code through modulating the physical offset of a plurality of data bits from a nominal track position is also disclosed.

Affiliated with

Also associated with

Rating

Digital compact disc player security system reproducing... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital compact disc player security system reproducing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital compact disc player security system reproducing... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1380385