HD DVD and Blu-ray Disc as High-Res Music Formats?
Dec 30 - All the talk about HD DVD and Blu-ray Disc has centered on their video capabilities and the unfortunate war between the two competing formats. But written into the specs for each disc is a tantalizing possibility: uncompressed high-resolution multichannel digital audio. The HD DVD spec has a provision for an audio-only disc with up to eight channels of 92kHz/24-bit linear PCM audio. The Blu-ray spec trumps even that, with up to eight channels of 192kHz/24-bit data. Blu-ray's higher data capacity and faster maximum transfer rate compared with HD DVD allow it to offer a higher maximum sampling rate and word length.
The upcoming Consumer Electronics Show (watch for our live coverage beginning January8 on AVguide.com) might provide some insight into the possibility of these new discs becoming high-res music carriers.
Digital audio by the numbers
Stereo MP3: 64kbps - 128kbps (typical)
Stereo Apple Lossless Coding:700kbps (typical)
Stereo CD (44.1kHz/16-bit):1.41Mbps
Dolby Digital:384 - 448kbps (5.1 channels; limited to 448kbps on DVD; up to 640kbps supported by format)
DTS:754kbps - 1.53Mbps (5.1 channels)
Dolby Digital Plus on HD DVD:640kbps - 3Mbps (7.1 channels)
Dolby Digital Plus on Blu-ray Disc:640kbps - 6Mbps (7.1 channels)
Stereo Direct Stream Digital (SACD)5.65Mbps
Dolby TrueHD on HD DVD:Up to 18Mbps (peak, 7.1 channels)
8-Channel 96kHz/24-bit:18.432Mbps (proposed music-only format for HD DVD)
Dolby TrueHD on Blu-ray Disc:Up to 24Mbps (peak, 7.1 channels)
8-Channel 192kHz/24-bit:36.86Mbps (proposed music-only format for Blu-ray Disc)
Notable Audio Quotation
"The surge in popularity of tubed amplifiers has nothing to do with nostalgia and everything to do with sound quality." David Manley, founder of VTL