Piracy-protected recording media

Details Piracy-protected recording media Piracy-protected recording media

H - Electricity

04

B

H04B 1/20 (2006.01)

Patent

CA 2604437

An optical medium piracy system employing a state-change material in association with a digital data indicia, wherein when state-change material is activated to change state, the optical medium moves from an unreadable to a readable condition, or from a less readable to more readable condition.

L'invention concerne un système anti-piratage pour support optique faisant appel à un matériau à changement d'état en association avec des indices de données numériques. Ainsi, lorsque le matériau à changement d'état est activé en vue d'un changement d'état, le support optique passe d'un état non lisible à un état lisible, ou d'un état moins lisible à un état plus lisible.

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