Video Asylum

I've heard the same "propaganda" from another source.....

68.166.203.160

oscar

In Reply to: RE: You really ought to be careful about cavalierly calling people liars, Jazz... posted by racerguy on December 06, 2007 at 11:52:51

that TrueHD may not be as "transparent" to the master as Dolby would have you believe. That would normally be pretty hard to believe until you consider Dolby employs some nonsense called "Dialog normalization" which to me implies digital volume control and screwing around with the original audio presentation.

Follow Ups:

Dolby Digital has always had Dialog Normalization metadata - racerguy 20:19:18 12/06/07 (1)
TrueHD also has dialnorm. It's never been a problem in the past, so I wouldn't be so quick to blame problems on the TrueHD codec like some people are trying to do. Rather, it's more likely that problems people are experiencing are due to crappy implementations of the TrueHD decoder, and player limitations, especially on Blu-ray players.
As I noted in a previous post about TrueHD on the Panasonic players, 'if you playback TrueHD on the Panasonic DMP-BD10 and BD10A players via the analog outs, the player overrides speaker size/distance settings, making them all "large" and equidistant. Also, if the number of speakers doesn't match what the soundtrack is configured for (i.e. it's a 7.1 and you only have 5.1), you'll lose information.'
That could certainly cause "transparency" problems. I suspect the Panasonics aren't the only players to have these kinds of implementation issues.

Edits: 12/06/07 12/06/07 12/06/07
- True, I trust my LG's decoding implementation not at all... - oscar 06:03:49 12/07/07 (0)
  I can live with dialnorm for lossy DD, but I'm far less sure about it for an alleged lossless audio format. While I don't have any direct experience on the subject, I've heard from a couple of sources, the use of dialnorm during the TrueHD encoding process results in a decoded end-result which may not be transparent to the master (and it can't be bit for bit if it actually screws around with the volume levels). How much of this is FUD and/or improperly-implemented decoding in the players has yet to come out.

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