Interactive compact disc system

Cryptography – Video cryptography – Copy protection or prevention

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

380203, H04N 7167

Patent

active

061048135

ABSTRACT:
A system for controlling the playing of rented compact discs on an end-user's compact disc player. The end-user obtains a validation disc on which is stored a control program and an expiry date. When the validation disc is inserted into the user's player, the player downloads the control program into its memory and runs the program. This causes the expiry date to be read from the disc and stored in the player's memory. Discs to be played on the player have stored thereon a second control program which is downloaded into the player's memory when they are inserted into the player. This second control program causes the player to check whether or not the current date, as maintained by the player, is later than the stored expiry date. If the current date is later, playing of the disc is prevented, whilst if it is earlier, playing of the disc is allowed.

REFERENCES:
patent: 5371792 (1994-12-01), Asai et al.
patent: 5754649 (1998-05-01), Ryan et al.
patent: 5883958 (1999-03-01), Ishiguro et al.
patent: 5896454 (1999-08-01), Cookson et al.
patent: 5905797 (1999-05-01), McRae

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

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

Rate now

     

Profile ID: LFUS-PAI-O-2015941

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.