Macrovision describes version 7 of its CDS-300 copy protection system as a major step forward in keeping P2P users’ hands off copyright content for which they don’t have the distribution rights. Having seen a demo of the alpha release, which performed as advertised, we were nonetheless pleased when a copy of the latest beta version turned up in The Register’s mailbag.
Since the alpha release, Macrovision has shifted the system’s focus away from tinkering with the contents of the CD Audio session – a technique it calls ‘passive protection’ – and toward smarter use of multiple disc partitions, or ‘session protection’.
That should help appease hi-fi purists concerned that the addition of deliberate errors into the audio datastream reduces the effective lifespan of the disc. CD playback requires a hefty level of error correction to yield the sound clarity for which the medium is famous. Adding noise to the audio content may fool ripping software but, say some observers, it also further taxes CD players’ error correction systems, which may already be having to cope with scratches and grease on the disc’s surface.
Read the complete Exclusive at TheRegister.co.uk