Definition: In what appears to be a response to Dolby's ProLogic IIz and Audyssey's DSX surround sound formats, DTS unveiled a new 11.1 channel surround sound format that they have labeled DTS Neo:X. This format does not require studios to mix soundtracks specifically for the 11.1 channel soundfield, however, they do have the ability to do so, if desired. However, DTS Neo:X takes cues already present in either 5.1 or 7.1 channel soundtracks and creates height and wide channels that are distributed to added height and wide speakers, enabling a more enveloping "3D" sound listening environment.
In order to experience the maximum benefit of DTX Neo:X processing, it is best to have 11 speakers, with 11 channels of amplification, and a subwoofer.
DTS Neo:X is being incorporated into a number of home theater receivers that have 11 channels of amplification, or provide 9 channels of built-in amplification with preamp outputs for connection of external amplifiers that add the needed extra channels. For more details, check out the Official DTS Neo:X Page
Additional Note: Although DTS Neo:X is designed as an 11.1 channel processing system, it can be modified to work with a 9.1 or 9.2 channel configuration - refer to the specifications of home theater receivers that incorporate the DTS Neo:X processing system.