The Blu-ray Disc Assn. and the DVD Forum have both selected Digital Theater Systems, Inc.'s (DTS) DTS Coherent Acoustics coding system as a mandatory audio technology for their respective next-generat

The Blu-ray Disc Assn. and the DVD Forum have both selected Digital Theater Systems, Inc.'s (DTS) DTS Coherent Acoustics coding system as a mandatory audio technology for their respective next-generation disc formats, Blu-ray Disc and HD-DVD, or High-Definition Digital Versatile Disc.

Additionally, DTS' extension technologies, known collectively as DTS++ and allowing higher data rates, lossless operation and additional channels, have been approved as optional features on both formats.

As a result, a DTS decoder will be built into every next-generation player that incorporates either HD-DVD or Blu-Ray Disc, according to a statement from DTS president/CEO Jon Kirchner.

DTS Coherent Acoustics was designed to be both extensible and backward compatible. Extensions to the original 5.1-channel format were an additional discrete channel for 6.1-channel audio -- known as DTS-ES -- and a 96 kHz sampling rate for high-resolution audio. DTS audio tracks using either of these enhancements can be played on any existing DTS decoder; advanced decoders can play the added data.

With the extra space and bandwidth offered by HD-DVD and Blu-ray Disc, DTS audio tracks encoded at data rates greater than 1.5 Mbits per second all the way to fully lossless operation -- a bit-for-bit identical soundtrack to the master -- can be delivered.