Originally posted by Andy T
> I expect boxsets to be replaced by audio DVD's within a couple of years. DVDs' greater storage capacity and the lower price of DVD players point in that direction. > > It would only take a few DVD's to realize the Recycle project.
Actually, DVD Audio is different, since the music is not compressed at all, so I don't know what the exact length of a DVD Audio can be... BTW, there are alread DVD Audio discs available, check here, so it's only a matter of time...
(Researching...)
The new DVD-Audio format supports sampling frequencies as high as 192 kHz and as low as 44.1 kHz, and uses 16-bit, 20-bit and 24-bit quantization bits. Version 1.0 can store 192-kHz, 24-bit, two-channel sound for 74 minutes on single-layered, single-sided disks. When standard linear PCM coding is used, 64 minutes of 192-kHz, 24-bit, two-channel sound can be stored in the single-sided, single-layer 12-cm disk.
When using the lowest frequency-CD sound (44.1 kHz, 16 bits, two channels)-one single-layer, single-sided disk can store more than 7 hours of sound.
In another article:
Meridian Lossless Packing (MLP)
The DVD-Forum has selected a "lossless" compression technology to extend to playback time compared to uncompressed PCM. The Meridian Lossless Packing (MLP) coding scheme compresses about 2 to 1 the raw uncompressed PCM data to provide approximately double the audio playback time.
MLP is different than perceptual or lossy data coding schemes such as Dolby Digital or DTS. While compressing audio data, both Dolby Digital and DTS remove some audio content that is viewed as "perceptionally" not significant. MLP does not alter the final decoded signal in any way, but merely ‘packs’ the audio data in such a way that a simple decoder can recover the original signal exactly bit-for-bit. An example of a familiar "lossless" compression system for computer data is PKZip, which will compress and fully restore computer data exactly bit-for-bit.
With MLP, a single-sided DVD-Audio disc can record over two hours of 6-channel 24-bit/96kHz audio or over two hours of 24-bit/192kHz stereo.
Note: The PCM audio specification for DVD-Video allows for sample sizes up to 24-bits and sample rates up to 96kHz based upon the number of channels. The maximum possible data rate is 6.144Mbps.
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What is DVD-Audio?
DVD-Audio is a format specifically designed to provide the highest possible audio fidelity capable on DVD. The audio fidelity of DVD-Audio far exceeds the quality of conventional CD's and audio on DVD-Video.
DVD-Audio takes advantage of the large storage capacity, speed and flexibility possible with DVD. DVD-Audio provides for audio in stereo and in multi-channel surround in a wide range of specifications. In addition to audio, a DVD-Audio disk can contain a limited amount of video, which can be used to display text, such as lyrics or notes; or stills such as a photo album. Up to 16 graphic stills can be associated with each track and on-screen displays can be used for lyrics and disc navigation. As an option, a DVD-Audio disc can also include audio tracks recorded in the DVD-Video specification (Dolby Digital and DTS) for compatibility with DVD-Video players.
A DVD disc is capable of recording video, audio and data information of many different types and formats. An industry group, named the DVD Forum has responsibility for establishing the industry standards and formats for DVD. In 1996, The DVD Forum released the DVD-Video format, which was designed to deliver video at a quality exceeding VHS tape with surround sound and better than CD audio. Before defining a DVD format optimized for audio, the DVD Forum sought the opinions of the music industry and audio equipment manufactures. In January 1998, the DVD Forum’s Working Group 4 released a draft DVD-Audio standard. In July 1998, the DVD Forum released the preliminary 0.9 version. In March 1999, the DVD Forum released the final version 1.0 of the DVD-Audio specification.
Ah well, to learn more, check that site...