What exactly does, ‘core dts track’ mean?

Curious about what that means. Thanks.

 

Some context would help.

 

I’ve seen it mentioned related to hi def tracks on blu ray discs. Sorry about the vagueness.

 

Perhaps they're referring to the DTS version of the original album the release is based on, bonus tracks, b-sides, live material and other goodies aside...?

 

To make dts backwards compatible, the audio encoding is separated into 'core' and 'extensions'. Thus, any DTS decoder can decode the core but only up to date decoders will be able to handle the extensions.

For example, an old dts decoder can play dts-HD MA but only as lossy standard dts, since it only decodes the 'core' data.