DTS is a series of multichannel audio technologies owned by DTS, Inc. (formerly known as Digital Theater Systems, Inc.), a company specializing in digital surround sound formats used for both commercial/theatrical and consumer grade applications.
On the consumer level, DTS is the often-used shorthand for the DTS Coherent Acoustics codec, transportable through S/PDIF and used on DVDs and Laserdiscs. This system is the consumer version of the DTS standard, using a similar codec without needing separate DTS CD-ROM media. Both music and movie DVDs allow delivery of DTS audio tracks, but DTS was not part of the original DVD specification (1997), so early DVD players did not recognize DTS audio tracks at all. The DVD specification was revised to allow optional inclusion of DTS audio tracks. The DVD title must carry one or more primary audio tracks in AC-3 or LPCM format (in Europe, MPEG-1 Layer 2 is also an allowed primary track format). The DTS audio track, if present, can be selected by the user. Modern DVD players can now decode DTS natively with no problem, or pass it through to an external decoder. Nearly all standalone receivers and many integrated ("home theater in a box") DVD player/receivers manufactured today can decode DTS.