Originally Posted by Sanctuary
Hi, guys. I am new to the forum. I am an owner of OPPO BDP 103 EU. Recently I bought Iron Maiden's album Dance of death on dvd-audio. When I play the dvd in my laptop it says there are three audio streams: dts, dd and stereo. When I play it in the oppo I can only choose between 5.1 surround and stereo. When I choose the 5.1 stream I can see on the display of my AVR Denon 4520 multi channel in. There is no dts or dd option (Inspite of that the sound is awesome). Why is that? Anything else on the disc plays fine.
P.s. Sorry for my poor English
Your English is pretty darn good. Don't worry about it
Originally Posted by rdgrimes
Your laptop is only able to play the DVD-Video content on the disc. The Oppo is playing the DVD-Audio content, which typically has only high-red stereo and high-res 5.1 audio. The Oppo outputs LPCM from DVD-A discs.
rdGrimes is dead right - but just to expand on this a bit with some background that will make his answer easier to understand...
DTS and DD both provide a way to cram a 5.1 soundtrack into the space available on a DVD-Video that is carrying the video for a movie around on it. The video for a movie takes up a lot of space on a DVD, and there is only a little bit of room left of the audio. They are part of the DVD-Video spec, and when you do surround sound on a normal DVD-Video, it is usually encoded using one or the other of these codecs. These codecs represent a trade-off between space and quality. The designers did a great job, and the quality still is pretty darn high...but if you don't NEED to make the trade-off...
The catch is that when you have no video (are at least very little of it), you have plenty of space to include all 6 channels of surround without having to "cram" anything. You can place all 6 channels on the disc with no compression and very little processing ... and that is the difference between your experience of playing on the PC (which is playing the "dvd-video" part of the disc - and hence the DTS/DD for surround) vs. on the Oppo (which is basically playing the DVD-Audio part of the disc, and hence does not NEED DTS/DD for surround).
You should note that there are later generations of DTS and Dolby, mostly for blu-ray, that take advantage of the space available and result in much-less of a trade-off between source quality and space.