[Speex-dev] Re: Speex-dev Digest, Vol 35, Issue 24

Tue May 1 00:03:26 PDT 2007

hi,
i am using AVTransmit3.java for transmitting audio,
how can i implement JSpeex or speex for compression and encoding.
please give me some idea about this.

shankar.s

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Today's Topics:

   1. problem decoding file (Damien Guiserix)
   2. Re: problem decoding file (Jean-Marc Valin)
   3. Re: problem decoding file (Damien Guiserix)
   4. Speex on a Blackfin DSP (Damien Guiserix)
   5. Re: Speex on a Blackfin DSP (Jean-Marc Valin)
   6. 11025kHz and framesizes question (Dave Findlay)

----------------------------------------------------------------------

Message: 1
Date: Mon, 30 Apr 2007 16:21:30 +0200
From: "Damien Guiserix" 
Subject: [Speex-dev] problem decoding file
To: speex-dev at xiph.org
Message-ID:
 <96fd86e70704300721l6c1312f7s44fe8068bea90cf at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hello,

I encode a file with speex so i get a .spx file

but i want to decode the same file
i get only one second of my file and nothing

Some idea why?

Thanks
Damien
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Message: 2
Date: Tue, 01 May 2007 00:35:00 +1000
From: Jean-Marc Valin 
Subject: Re: [Speex-dev] problem decoding file
To: Damien Guiserix 
Cc: speex-dev at xiph.org
Message-ID: <4635FE94.2080101 at usherbrooke.ca>
Content-Type: text/plain; charset=ISO-8859-1

What tool do you use for encoding and decoding? If the answer isn't
speexenc/speexdec, then try those.

 Jean-Marc

Damien Guiserix a écrit :
> Hello,
> 
> I encode a file with speex so i get a .spx file
> 
> but i want to decode the same file
> i get only one second of my file and nothing
> 
> Some idea why?
> 
> Thanks
> Damien
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Speex-dev mailing list
> Speex-dev at xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev

------------------------------

Message: 3
Date: Mon, 30 Apr 2007 16:37:17 +0200
From: "Damien Guiserix" 
Subject: Re: [Speex-dev] problem decoding file
To: "Jean-Marc Valin" ,
 speex-dev at xiph.org
Message-ID:
 <96fd86e70704300737s7bb67b90od562d942131ed9c4 at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

i already use speexenc/speexdec on cygwin

2007/4/30, Jean-Marc Valin :
>
> What tool do you use for encoding and decoding? If the answer isn't
> speexenc/speexdec, then try those.
>
>         Jean-Marc
>
> Damien Guiserix a écrit :
> > Hello,
> >
> > I encode a file with speex so i get a .spx file
> >
> > but i want to decode the same file
> > i get only one second of my file and nothing
> >
> > Some idea why?
> >
> > Thanks
> > Damien
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Speex-dev mailing list
> > Speex-dev at xiph.org
> > http://lists.xiph.org/mailman/listinfo/speex-dev
>
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Message: 4
Date: Mon, 30 Apr 2007 17:09:37 +0200
From: "Damien Guiserix" 
Subject: [Speex-dev] Speex on a Blackfin DSP
To: speex-dev at xiph.org
Message-ID:
 <96fd86e70704300809o4de0cbd6leb751e957a3c4fe0 at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

Hello,
i want to use speex on a Blackfin DSP to make CELP compression

I want to know how many MIPS are necessary to make Speex to work?

Thanks

Damien
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Message: 5
Date: Tue, 01 May 2007 01:21:09 +1000
From: Jean-Marc Valin 
Subject: Re: [Speex-dev] Speex on a Blackfin DSP
To: Damien Guiserix 
Cc: speex-dev at xiph.org
Message-ID: <46360965.8060706 at usherbrooke.ca>
Content-Type: text/plain; charset=ISO-8859-1

Last I heard (results from David Rowe), the encoder could go as low as
25 MIPS for 15 kbps (complexity 1). I expect there's potential to reduce
that to around 10-15 MIPS through better optimisation (and a better
compiler).

 Jean-Marc

Damien Guiserix a écrit :
> Hello,
> i want to use speex on a Blackfin DSP to make CELP compression
> 
> I want to know how many MIPS are necessary to make Speex to work?
> 
> Thanks
> 
> Damien
> 
> 
> ------------------------------------------------------------------------
> 
> _______________________________________________
> Speex-dev mailing list
> Speex-dev at xiph.org
> http://lists.xiph.org/mailman/listinfo/speex-dev

------------------------------

Message: 6
Date: 30 Apr 2007 16:26:32 -0000
From: "Dave Findlay" <5bto2703 at sneakemail.com>
Subject: [Speex-dev] 11025kHz and framesizes question
To: speex-dev at xiph.org
Message-ID: <886-49183 at sneakemail.com>

I have been using the Speex NB mode with an 11025 kHz signal, without adjusting the framesize, and it's been sounding just fine to me. However I was wondering what the best way to make 11025kHz would be. I also have an audio driver that uses 2kB buffers, and the NB framesize of 160 doesn't divide evenly into that so I end up having to shovel tails of buffers around which isn't too efficient.

So I wondered if there was a clean way I could change the NB mode buffer size to be 256, which would be a little closer 20ms at 11025 but also be divisible by 2048.

Should I add a new custom mode to the modes array or should I mess with the NB mode? Any advice on what I should do with subFrameSize and the other parameters in SpeexNBMode (if anything) if I change the framesize to be 256?

Thanks,
Dave

------------------------------

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End of Speex-dev Digest, Vol 35, Issue 24
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