Speex dev - Feb 2006 - Speex Command line, Changing the LPC order and modifying the codebook

>There's plenty of areas for improvements that don't require
incompatible changes like this one.
can u please tell me what do I do to make it more exact waveform coder for music
rather than speech.
I understand that its meant for speech, but I was just using it for music... I
am interested in getting the residual
as small as possible using speex.
Can you please tell me the areas to look at in speex algorithm for this.
thanks,

devilal




***************************************************************************
Devi Lal Sharma
Final Yr. Dual Degree(Communications)
IIT MADRAS

Mobile: +91-9986423985(I am currently in bangalore)
email: devilal_sharma@yahoo.com, devilal@gmail.com
***************************************************************************
		
---------------------------------
Brings words and photos together (easily) with
 PhotoMail  - it's free and works with Yahoo! Mail.
-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://lists.xiph.org/pipermail/speex-dev/attachments/20060209/59b307ba/attachment.htm

Hi devilal,

You might want to think about, whether this is really what you want.  
Linear prediction codes speech very well because it benefits from the  
signal properties from speech signals. Music does not have these  
properties, so lp does not code music too well.

I don't think twiddling with the LPC order will give you any good  
results. I may be wrong though.

Maybe you'd better look into Ogg Vorbis (http://www.vorbis.com/)  
which is an open source music codec.

Ruotger


Am 09.02.2006 um 11:00 schrieb devilal sharma:
> can u please tell me what do I do to make it more exact waveform  
> coder for music rather than speech.
> I understand that its meant for speech, but I was just using it for  
> music... I am interested in getting the residual
> as small as possible using speex.
---
"Less code is better code" - Wil Shipley

Ruotger Skupin, Mac OS X Software Engineering

ilink Kommunikationssysteme GmbH
M?nzstr. 13; 10178 Berlin - Germany


-------------- next part --------------
An HTML attachment was scrubbed...
URL:
http://lists.xiph.org/pipermail/speex-dev/attachments/20060209/aa16a855/attachment.html

Le jeudi 09 f?vrier 2006 ? 02:00 -0800, devilal sharma a ?crit
:
> can u please tell me what do I do to make it more exact waveform coder for
music rather than speech.
> I understand that its meant for speech, but I was just using it for
music... I am interested in getting the residual
> as small as possible using speex.
I thought I had already discussed this on HA. This is like saying: "I
understand that my car is meant to go on the road, but I just want to
use it to fly. How can I modify it?".
> Can you please tell me the areas to look at in speex algorithm for this.
Well, you could remove the LPC part, the fixed codebook and the adaptive
codebook and replace all that by an MDCT and Huffman coding. You can get
a similar project under the name Vorbis ;-)

	Jean-Marc
> devilal
> 
> 
> 
> ***************************************************************************
> Devi Lal Sharma
> Final Yr. Dual Degree(Communications)
> IIT MADRAS
> 
> Mobile: +91-9986423985(I am currently in bangalore)
> email: devilal_sharma@yahoo.com, devilal@gmail.com
> ***************************************************************************
> 
> 
> ______________________________________________________________________
> Brings words and photos together (easily) with
> PhotoMail  - it's free and works with Yahoo! Mail.
> _______________________________________________
> Speex-dev mailing list
> Speex-dev@xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev