[Speex-dev] Speex Codec Question

[Jean-Marc Valin]

Le mercredi 19 juillet 2006 à 20:05 +0800, Janus.Wang at QMITW.COM a
écrit :
> Hi Jean-Marc,
> Please read the attachment file for Marvell 8618 datasheet for your reference,

Too much is like not enough. Care to summarize? (speed, arch level, ...)

> BTW, Could you mind to specify the voice computing power for Speex codec?
> 	1. Sample Rate 8K / Bit Rate - 2.15K ~ 24.6Kbps ( NarrowBand)

The CPU requirements can vary a lot as a function of bit-rate. 6 kbps
can be done on a ~80 MHz 7tdmi, while 18.2 kbps requires at least 2x
that.

> 	2. Sample Rate 16K/ Bit Rate - 2.15K ~ 24.6K bps ( NarrowBand)

Nonsense. Please read the manual

> 	3. Sample Rate 8K / Bit Rate - 4~44.2Kbps ( WideBand)

Nonsense. Please read the manual.

	Jean-Marc

>  
> Best Regards
>  
> Janus ( Freedom )
> System Engineering / PLM
> Quanta Microsystems, Inc.
> TEL : +886 (3) 571-5996 # 5217
> Mobile : +886 0953-499071
> Mail : janus.wang at qmitw.com
> MSN : freedom_janus at hotmail.com
> SKYPE : freedom_janus
>  
> 
> -----Original Message-----
> From: Jean-Marc Valin [mailto:Jean-Marc.Valin at USherbrooke.ca] 
> Sent: Wednesday, July 19, 2006 7:09 PM
> To: Janus Wang(王正宇)
> Cc: speex-dev at xiph.org
> Subject: RE: [Speex-dev] Speex Codec Question
> 
> Le mercredi 19 juillet 2006 à 18:42 +0800, Janus.Wang at QMITW.COM a
> écrit :
> > Hi Jean-Marc,
> > We already decided to use Marvell's 88F8618 platform,
> 
> No clue what that chip is.
> 
> > But I have few questions to you and listed it below,
> > 
> > Q1, Can we implement the Speex Codec on Marvell 8618 for non-HW DSP of platform?
> 
> Care to give the specs?
> 
> > Q2, Based on ARM9 CPU core, do you have any information to let me estimation the voice computing power for Speex codec?
> 
> What sampling rate, what bit-rate?
> 
> 	Jean-Marc
> 
> > Sorry to bother your job again....
> >  
> > Best Regards
> >  
> > Janus ( Freedom )
> > System Engineering / PLM
> > Quanta Microsystems, Inc.
> > TEL : +886 (3) 571-5996 # 5217
> > Mobile : +886 0953-499071
> > Mail : janus.wang at qmitw.com
> > MSN : freedom_janus at hotmail.com
> > SKYPE : freedom_janus
> >  
> > 
> > -----Original Message-----
> > From: Jean-Marc Valin [mailto:Jean-Marc.Valin at USherbrooke.ca] 
> > Sent: Saturday, June 03, 2006 7:40 PM
> > To: Janus Wang(王正宇)
> > Cc: speex-dev at xiph.org
> > Subject: Re: [Speex-dev] Speex Codec Question
> > 
> > 
> > > Q1, how much of MIPS we need to reserve the system computing power for
> > > Speex Codec needed?
> > 
> > It greatly depends on your chip. Some numbers I've had on the latest
> > version (svn) are about 30 MIPS on ADI Blackfin and about 40 MIPS for TI
> > C55x and C6x DSPs. That's at 15 kbps narrowband, complexity 1. Other
> > settings will change the complexity.
> > 
> > > Q2, do we need to use the voice DSP for Speex Codec needed?
> > 
> > Sorry, could you rephrase your question?
> > 
> > 	Jean-Marc
> > 
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