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Old 7th April 2019, 18:02   #28468  |  Link
jdobbs
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Join Date: Oct 2001
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I can probably add a hidden option that will force a new AC3 encode @640Kbs using the TrueHD as it's source if the core is 448Kbs. But, as sneaker_ger said, I'm not sure whether a reencode at 640Kbs would provide a noticeable improvement over the studio authored 448Kbs. Probably so, but I think few people could tell the difference.

A guess might be that they are using the 448Kbs audio that is used in their DVD authoring as their core (since that's the max rate for DVD).

Another guess might be that they are purposely trying to make the TrueHD sound superior to what it truly is by creating a core that would be less than perfect for comparison. Tests have shown that a DD AC3 encode at 640Kbs is indistinguishable from the a lossless original in double-blind tests. Tricks like that aren't unusual. What you typically see is the volume level increased in "HD" audio (compared to standard encode) so people think they are hearing a difference that really isn't there (at least to the human ear).
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Last edited by jdobbs; 7th April 2019 at 18:08.
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