Home Theater Forum - View Single Post - Dialog-Normalization & accuracy issues on the HDM lossless codecs?

Roogs Benoit · 04-18-2008, 01:42 PM

Originally Posted by MSmith83:

"I just listened to Shoot 'Em Up. The first thing I noticed is that the MA extension is significantly lower in volume than the core. When cranked to volume match, it is further evident that it's like listening to an entirely different mix. The MA extension has even deeper bass, but the most significant difference was the increased spaciousness of the effects and seemingly better channel separation.

This doesn't make sense. There should be no difference in amplitude between the core track of DTS_HD MA and the full file including the extensions.

Sounds to me like there is a possible set-up issue with the receiver.
Why would the core sound "significant difference was the increased spaciousness of the effects and seemingly better channel separation."

Better channel separation and spaciousness on the core track of DTS, than with the Lossless extensions included?

Something is being overlooked here.

I have found a bug in the DD TRU-HD encoder that under certain circumstances it's not exactly bit for bit. It only affects the surrounds and does not degrade the signal one bit, but it does make the file larger in size and the peak bit-rate higher than it needs to be.

Dolby is currently working on a fix for this.

It won't affect the consumer really, just the people mastering the audio and authoring the discs (IF they notice it).

Roogs

04-18-2008, 01:42 PM	#2 of 5
Roogs Benoit Member Location: Burbank California Join Date: Mar 2002 Local Time: 05:00 AM Local Date: 10-13-2008 Posts: 57	Re: Dialog-Normalization & accuracy issues on the HDM lossless codecs? Originally Posted by MSmith83: "I just listened to Shoot 'Em Up. The first thing I noticed is that the MA extension is significantly lower in volume than the core. When cranked to volume match, it is further evident that it's like listening to an entirely different mix. The MA extension has even deeper bass, but the most significant difference was the increased spaciousness of the effects and seemingly better channel separation. This doesn't make sense. There should be no difference in amplitude between the core track of DTS_HD MA and the full file including the extensions. Sounds to me like there is a possible set-up issue with the receiver. Why would the core sound "significant difference was the increased spaciousness of the effects and seemingly better channel separation." Better channel separation and spaciousness on the core track of DTS, than with the Lossless extensions included? Something is being overlooked here. I have found a bug in the DD TRU-HD encoder that under certain circumstances it's not exactly bit for bit. It only affects the surrounds and does not degrade the signal one bit, but it does make the file larger in size and the peak bit-rate higher than it needs to be. Dolby is currently working on a fix for this. It won't affect the consumer really, just the people mastering the audio and authoring the discs (IF they notice it). Roogs Last edited by Roogs Benoit : 04-18-2008 at 01:55 PM.