Dolby Surround specification

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frozen_fire
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Joined: Thu Feb 27, 2020 9:34 pm

Dolby Surround specification

Post by frozen_fire »

I see "Dolby Surround" as an option for downmixing. In Handbrake 1.3.1, is this the 1974 version or the 2104 version of Dolby Surround?
https://en.wikipedia.org/wiki/Dolby_Pro ... y_Surround

They both share the same name, and the documentation in https://handbrake.fr/docs/en/1.3.0/adva ... sound.html does not specify.

Furthermore, in Handbrake 1.3.1, which version is the Dolby ProLogic II downmixing option?
A) DolbyProLogicII
B) DolbyProLogicIIx
C) DolbyProLogicIIz

rollin_eng
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Re: Dolby Surround specification

Post by rollin_eng »

It’s definitely not the 2104 version :)

frozen_fire
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Joined: Thu Feb 27, 2020 9:34 pm

Re: Dolby Surround specification

Post by frozen_fire »

Apologies. I re-read my post twice, looking for errors.
Correction: In Handbrake 1.3.1, is this the 1974 version or the 2014 version of Dolby Surround?

Furthermore, in Handbrake 1.3.1, which version is the Dolby ProLogic II downmixing option?
A) Dolby ProLogic II
B) Dolby ProLogic IIx
C) Dolby ProLogic IIz

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JohnAStebbins
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Re: Dolby Surround specification

Post by JohnAStebbins »

"Dolby Surround" is the original DolbyProLogic, i.e.the 1987 version.
Dolby ProLogic II is DolbyProLogicII

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JohnAStebbins
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Re: Dolby Surround specification

Post by JohnAStebbins »

Given that Dolby has chosen to re-use old terminology and apply it to it's unrelated Atmos offering, we should consider renaming "Dolby Surround" to "Dolby Pro Logic". Or maybe just remove them all together? Seriously, does anyone use this anymore?

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Rodeo
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Re: Dolby Surround specification

Post by Rodeo »

JohnAStebbins wrote:
Thu Feb 27, 2020 10:42 pm
Or maybe just remove them all together? Seriously, does anyone use this anymore?
+1 HB's implementation was never that good with strongly correlated channels anyway.

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