COPY PROTECTION OF COMPACT DISKS WITH DIGITAL AUDIO RECORD Russian patent published in 2005 - IPC

Abstract RU 2249861 C2

FIELD: copy protection.

SUBSTANCE: control data are encoded on a CD. Copy protection method includes stage of playback of selected control data incorrectly and/or non-precisely. Said control data are inaccessible or not readable at all by sound player, which only can play sound data. Wrong control data make sound data absolutely not readable by data reading device. Copy-protected CD with digital sound record contains audio data and control data, encoded in above-mentioned way.

EFFECT: higher efficiency.

2 cl, 7 dwg

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RU 2 249 861 C2

Authors

Torbarak Marijan Domagoj

Dates

2005-04-10—Published

2000-05-25—Filed