DVD

DVD-Audio

DVD-Audio is a format for delivering high-fidelity audio content on a DVD. It offers many channels (from mono to 5.1 surround sound) at various sampling frequencies and sample rates. Compared to the CD format, the much higher capacity DVD format enables the inclusion of either considerably more music (with respect to total running time and quantity of songs) or far higher audio quality (reflected by higher linear sampling rates and higher vertical bit-rates, and/or additional channels for spatial sound reproduction).

Related Topics:
Mono - Surround sound - CD - Sampling rate - Bit - Spatial sound

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Despite DVD-Audio's superior technical specifications, there is debate as to whether or not the resulting audio enhancements are distinguishable to typical human ears. DVD-Audio currently forms a niche market, probably due to its dependency upon new and relatively expensive equipment.

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Security

DVD-Audio discs employ a robust copy prevention mechanism, called Content Protection for Prerecorded Media (CPRM / CPPM) supported by the DVD+RW Alliance (IBM, Intel, Matsushita and Toshiba).

Related Topics:
Copy prevention - Content Protection for Prerecorded Media - IBM - Intel - Matsushita - Toshiba

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Unlike DVD-Video's content-scrambling system (CSS), as of 2005, CPPM has not yet been cracked.

Related Topics:
Content-scrambling system - As of 2005 - Cracked

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All above formats are also available as 8 cm (3 inch) sized DVD mini discs (not mini-DVD, which describes DVD data on a CD) with a disc capacity of 1.5 GB.

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