My guess would be on Blu-ray you will see a track with one of the higher resolution codecs or a lossless PCM track.
My Blu-Ray music recordings:
Elton 60 (not his best performance...)
Tony Bennett (duos with K.D. Lang (and Chris Botti), Barbra Streisand, John Legend, Elton John, Michael Bubble, Diana Krall, Juanes)
Chris Botti Live (duos with Sting, Jill Scott, Paula Cole, Renee Oldstead, Paul Buchanan, Gladys Night)
and coming next week, Celine Dion:*New Day.
PCM Uncompressed 5.1 audio in all cases.
These are Videos in Blu-Ray taped with HD cameras and the image is so clear that you are in the room with the performers.
Audio in PCM 5.1 is better than any DTS recordings I have heard. Somewhat like SACD quality. See present selection at:
http://www.sonybmg.com/blu-ray/