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DVD-Audio

 

DVD-Audio
DVD-Audio format logo
Media Type Optical Disc
Encoding Meridian Lossless Packing or uncompressed LPCM
Capacity up to 8.5 GB
Read mechanism 640 nm wavelength semiconductor laser
Standard DVD Books, Part 4, DVD-Audio Book, DVD Audio Recording Book
Developed by DVD Forum
Usage Audio storage
Extended from DVD

DVD-Audio is a digital format for delivering high-fidelity audio content on a DVD and is commonly abbreviated as DVD-A. No intending to be a video delivery format, DVD-Audio is not the same as video DVDs containing concert films or music videos.
The first discs entered the marketplace in 2000. DVD-Audio was in a format war with another format for delivering high-fidelity audio content---Super Audio CD (SACD).

 

Audio Specifications

DVD-Audio offers many possible configurations of audio channels, ranging from single-channel mono to 5.1-channel surround sound, at various sampling frequencies and sample rates.
Compared to the Compact Disc, the much higher capacity DVD format enables the inclusion of either:
Considerably more music (with respect to total running time and quantity of songs)
Far higher audio quality reflected by higher linear sampling rates and higher bit-per-sample resolution
Additional channels for spatial sound reproduction

 

Player compatibility

With the introduction of the DVD-Audio format, some kind of backward compatibility with existing DVD-Video players was desired, although not required. To address this, most DVD-Audio discs also contain DVD-Video compatible data that allows the standard DVD-Video Dolby Digital 5.1-channel audio track on the disc (which can be downmixed to two channels for listeners with no surround sound setup). Many DVD-Video players also offer the option to create a Dolby MP matrix-encoded soundtrack for older surround sound systems lacking Dolby Digital or DTS decoding. Some discs also include a native Dolby Digital 2.0 stereo, and even a DTS 96/24 5.1-channel, audio track.

 

Preamplifier/Surround Processor interface

In order to play DVD-Audio, a preamplifier or surround controller with six analog inputs was originally required. Whereas DVD-Video audio formats such as Dolby Digital and DTS can be sent via the player's digital output to a receiver for conversion to analog form and distribution to speakers, DVD-Audio is not allowed to be delivered via unencrypted digital audio link at sample rates higher than 48 kHz (i.e., ordinary DVD-Video quality) due to concerns about digital copying.
However encrypted digital formats have now been approved by the DVD Forum, the first of which was Meridian Audio's MHR (Meridian High Resolution). The High Definition Multimedia Interface (HDMI 1.1) also allows encrypted digital audio to be carried up to DVD-Audio specification (6 × 24-bit/96 kHz channels or 2 × 24-bit/192 kHz channels).

 

Sound quality

From a purely technical standpoint, the audio resolution of a DVD-Audio disc can be substantially higher than standard red book CD audio. DVD-Audio supports bit depths up to 24-bit and sample rates up to 192 kHz, while CD audio is 16-bit, 44.1 kHz. In both cases, the source recording may have been made at a much higher bit and sample rate, and down-converted for commercial release.

 

Copy protection

DVD-Audio discs may optionally employ a copy protection mechanism called Content Protection for Prerecorded Media (CPPM). CPPM, managed by the 4C Entity, was designed to prevent users from extracting audio to computers and portable media players.

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Requirements

You can download Blu-ray Media Player and test it before buying.

Requires OS X 10.5+ and Blu-ray Drive

Requires Windows XP or later and Blu-ray Drive

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