What is DTS and how different from SACD 5.1/DVD-A

DTS is just another flavor of audio for DVDs--that is, video DVDs. Like Dolby Digital (and MP3s), it uses lossy compression (i.e., low resolution). These days, I think most AV receivers can read both DTS and DD soundtracks, so you're covered.

DVD-A and SACD are high-resolution audio-only formats. Completely different beasts, for which you need a DVD player that can read either, or both.

one article I read said: DTS regards the compression for the rear/surround channel information, it is higher quality than other compression schemes available.

For a good description go to dtsonline.com.

Mike