|Originally posted by NightHawk
The gurus on the Denon foum say this is normal because the flages are not yet included in the Dolby EX material. If this is true nobody is auto detecting EX matrerial.
Some DTS ES titles ('Bone Collector'
, 'Pitch Black'
, '102 Dalmations'
) aren't flagged and won't automatically trigger ES (matrix) decoding; however, most ES titles have the correct flag in place. Titles in the DTS ES Discrete 6.1 format haven't had this problem so far.
Flags were a more recent addition to EX soundtracks. Surround EX encoded DVDs started appearing in 1999, but the software to embed flags wasn't released till two years later; and it was some time after
that when studios finally started using the flags. By this time, of course, quite a few of EX encoded DVDs had been released; many initial titles weren't even labelled as EX because some of the studios didn't want to confuse typical consumers with yet another format.
Initially, there was a problem with the way the flagged EX soundtracks reacted with some receivers and pre-pros. The culprit wasn't the flag itself as much as it was the 'change-of-state' data that was included along with the flag. When you switch from one processing mode to another, you probably notice that your reciever mutes for just a moment. However, when the the EX flag was detected and the receiver was told to change its state from DD 5.1 to DD EX, some receivers and processors (like mine) muted and stayed that way.
Oops! Another amusing early goof: the first EX flagged DVD was 'Pearl Harbor'
, which was NOT an EX encoded movie but the DVD's French 5.1 track mistakenly had the flag in place. Doh!!
Since much consumer gear was already out there, that reacted problematically with the flag, Dolby fixed the problem with new software for their professional EX encoders. While I'm sure that studios have started using the corrected flagging software, I have yet to see a list of properly flagged DVDs. It may actually be difficult to to make such a list because studios don't report to Dolby which titles they encode in EX, let alone which they flag. Besides, there seems to be no consistency for what's flagged and what isn't. For example: Dreamworks' 'Minority Report'
and Disney's 'Atlantis:The Lost Empire, Collector's Edition'
are both, strangely enough, auto-flagged for DD EX but not for DTS ES. Go figure!
|Are you guy sure you are auto detecting EX material?
Personally, my last experience with a properly flagged EX soundtrack is when I ordered 'Minority Report'
on pay-per-view (digital cable) from my local cable company (Charter Cable). My processor allows me to set the EX decoding parameter to ON, OFF or AUTO. I had it set to the latter and the movie automatically triggered EX decoding.
If you want to be sure whether a particular DVD has a back-channel encoded into the soundtrack or not, here's the most thorough and accurate EX/ES list
I've seen, plus it is kept very up-to-date. The list has DVD titles separated out by the various back-channel formats: DD EX, DTS ES, DTS ES Discrete 6.1 and even ES 6.1 DTS CDs.