Speex dev - Aug 2004 - reommended settings for low bitrate voicecom codec ?

Without seeing some examples of your Speex implementation, it would be
difficult to comment.  I can tell you that you need to make that the
conversion between floating point and fixed is done properly.  This seems to
be a common problem.

Also, I am confident that TeamSpeak is using LHACM.ACM and distributing it.
While HawkVoice is being distributed, it doesn't appear to be used at all.

-----Original Message-----
From: owner-speex-dev@xiph.org [mailto:owner-speex-dev@xiph.org] On Behalf
Of Peter Kirk
Sent: Tuesday, May 13, 2003 11:55 AM
To: speex-dev@xiph.org
Subject: Re: [speex-dev] reommended settings for low bitrate voicecom codec
?

Am Dienstag, 13. Mai 2003 03:22 schrieb Allen Drennan:
> Hello,
>
> HawkVoice doesn't have a 6.3kbps codec for CELP, it has a 4.5kbps CELP
> codec and I do not believe it is being used by TeamSpeak.  The 6.4kbps
CELP
> being used in TeamSpeak, to which you are referring I believe comes from
> Lernout & Hauspie's LHACM.ACM file which it appears you are
redistributing
> (I assume TeamSpeak has a license and permission to do this).  The only
> people I thought had this license was Microsoft for Netmeeting 3.
Well,

im very sure teamspeak only uses hawkvoice codecs currently. It might very 
well be that the 4.5 kbps Cepl from HawkVoice comes to be 6.3 with the 
overhead...
>
> From my experience, the Speex codec is much better than the 4.5kbps CELP
> codec in HawkVoice, and on par with various L&H CELP codecs.  It is
tricky
> to implement though, and if you don't do it right - it won't sound
correct.

So, then (as teamspeak currently doesnt use L&H) speex should sound better
not 
worse ? What might there be wrong ? 
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-- 
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Am Dienstag, 13. Mai 2003 03:22 schrieb Allen Drennan:
> Hello,
>
> HawkVoice doesn't have a 6.3kbps codec for CELP, it has a 4.5kbps CELP
> codec and I do not believe it is being used by TeamSpeak.  The 6.4kbps CELP
> being used in TeamSpeak, to which you are referring I believe comes from
> Lernout & Hauspie's LHACM.ACM file which it appears you are
redistributing
> (I assume TeamSpeak has a license and permission to do this).  The only
> people I thought had this license was Microsoft for Netmeeting 3.
Well,

im very sure teamspeak only uses hawkvoice codecs currently. It might very 
well be that the 4.5 kbps Cepl from HawkVoice comes to be 6.3 with the 
overhead...
>
> From my experience, the Speex codec is much better than the 4.5kbps CELP
> codec in HawkVoice, and on par with various L&H CELP codecs.  It is
tricky
> to implement though, and if you don't do it right - it won't sound
correct.
So, then (as teamspeak currently doesnt use L&H) speex should sound better
not
worse ? What might there be wrong ? 
> --- >8 ----
> List archives:  http://www.xiph.org/archives/
> Ogg project homepage: http://www.xiph.org/ogg/
> To unsubscribe from this list, send a message to
> 'speex-dev-request@xiph.org' containing only the word
'unsubscribe' in the
> body.  No subject is needed. Unsubscribe messages sent to the list will be
> ignored/filtered.

-- 
Shick's Law:
	There is no problem a good miracle can't solve.

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Am Mittwoch, 14. Mai 2003 06:45 schrieb Allen Drennan:
> Without seeing some examples of your Speex implementation, it would be
> difficult to comment.  I can tell you that you need to make that the
> conversion between floating point and fixed is done properly.  This seems
> to be a common problem.
>
> Also, I am confident that TeamSpeak is using LHACM.ACM and distributing it.
> While HawkVoice is being distributed, it doesn't appear to be used at
all.
It is not. REALY.

Anyway: As I am not the coder guy I have no access to the source :(...however, 
as I said before, I could get you a client to listen to it ? If you are 
interested, contact me in irc @ qnet (irc.de.quakenet.org) in channel 
#teamspeak - my name would be AD|pwklinuxfan. Hope to see you there.

Peter


-- 
Our informal mission is to improve the love life of operators worldwide.
		-- Peter Behrendt, president of Exabyte

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