IPB

Welcome Guest ( Log In | Register )

LAME 3.93.1 vs 3.90.3
ye110man
post May 11 2003, 11:51
Post #1





Group: Members
Posts: 90
Joined: 27-April 03
Member No.: 6233



LAME 3.93.1 using --preset standard -Z: 6,563,619 bytes
LAME 3.90.3 using --alt-preset standard (-Z is default): 6,775,038 bytes

why? is there a quality difference?
Go to the top of the page
+Quote Post
 
Start new topic
Replies
Dibrom
post May 12 2003, 21:06
Post #2


Founder


Group: Admin
Posts: 2958
Joined: 26-August 02
From: Nottingham, UK
Member No.: 1



QUOTE (amano @ May 12 2003 - 12:56 PM)
QUOTE (Echizen @ May 11 2003 - 09:18 AM)
Hm... the presets are optimized for 3.90.2 and because of different routines 3.93.1 uses they'll probably result in bad quality.

hmm. probability is just a guess, too.

formerly gabriel stated that the alt-presets shouldn't be affected by the changes (by design).

I don't see, why we shouldn't believe in that, until the contrary is proven.

The alt-presets can seen to be affected by the simple fact that the resulting bitrate differs between the two rounding modes. This will affect quality on some level. The question is whether it is detectable or not, and how often.

I don't know where Gabriel made this statement, or why (or even if -- I don't remember seeing this at least), but it's incorrect and misleading.

Also, as I've stated in the past, I have heard a difference between using an ICL compile (with the rounding mode I tuned for) vs. an MSVC compile (with a rounding mode I didn't tune for) in at least one case. The chance for there to be more differences certainly is very real.
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



RSS Lo-Fi Version Time is now: 24th April 2014 - 13:44