[Speex-dev] RE: Speex-dev Digest, Vol 41, Issue 6

[Shridhar Joshi]

Hi,

I am running speex wideband for speech. While doing that I am getting
Hissing sound during silence. If you want I can give you input and
output files.

Thanks,
Shridhar

-----Original Message-----
From: speex-dev-bounces at xiph.org [mailto:speex-dev-bounces at xiph.org] On
Behalf Of speex-dev-request at xiph.org
Sent: Tuesday, October 09, 2007 12:30 AM
To: speex-dev at xiph.org
Subject: Speex-dev Digest, Vol 41, Issue 6

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Today's Topics:

   1. Re: Speex on DSPic, violation of license? (David Willmore)
   2. Re: Speex on DSPic, violation of license? (Jean-Marc Valin)
   3. Floating point implementation (Matt Bucknall)


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

Message: 1
Date: Sun, 7 Oct 2007 15:30:40 -0400
From: "David Willmore" <davidwillmore at gmail.com>
Subject: Re: [Speex-dev] Speex on DSPic, violation of license?
To: "Jean-Marc Valin" <jean-marc.valin at usherbrooke.ca>
Cc: speex-dev at xiph.org
Message-ID:
	<1cddf4cc0710071230r2620f413o583b776e0cb3a2db at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

On 10/1/07, Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> wrote:
> I'm aware of Microchip's closed-source port of Speex to the dsPIC. As
> far as I know (haven't checked the details), this is perfectly legal,
> even though I think it's a dumb decision for a company that's in the
> business of selling chips. I say it's dumb because by not contributing
> the changes back, they ended up not benefiting from significant
> improvements I made to Speex since their forked. Had they done so, the
> memory requirement for Speex on dsPIC would be smaller than what they
> have now and the quality would likely be better. In case there are any
> dsPIC developers around, you should know that the current Speex
svn/git
> version (or 1.2beta2) now has small enough RAM requirement to fit on
the
> dsPIC, so it probably wouldn't be too hard to create an open-source
port
> that's actually better (and of course cheaper) than what Microchip
sells.

There are a couple of us working on it.  We're both also radio amateurs,
so
we hope to keep our work completly free--so it can be used in open
standard
software for amateur radio--as well as whatever else people feel like
using
it in.  Our code will make its way back into the main tree.

Jean-Marc,  all of your hard work in reducing memory footprint and CPU
usage
is wonderful.  Thank you, very much.

Cheers,
David n0ymv


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

Message: 2
Date: Mon, 08 Oct 2007 09:31:18 +1000
From: Jean-Marc Valin <jean-marc.valin at usherbrooke.ca>
Subject: Re: [Speex-dev] Speex on DSPic, violation of license?
To: David Willmore <davidwillmore at gmail.com>
Cc: speex-dev at xiph.org
Message-ID: <47096C46.1010804 at usherbrooke.ca>
Content-Type: text/plain; charset=ISO-8859-1

Hi David,

Glad to know you're working on this? What's the status of that? Does it
run on a dsPIC yet? Do you have any code yet that is worth merging? It's
good when things can be merged early; otherwise it takes much more
effort as the codebases diverge. In some cases, I actually don't even
mind merging code that doesn't work/compile -- as long as it's
platform-specific code that doesn't break things that worked before.

	Jean-Marc

David Willmore wrote:
> On 10/1/07, Jean-Marc Valin <jean-marc.valin at usherbrooke.ca> wrote:
>> I'm aware of Microchip's closed-source port of Speex to the dsPIC. As
>> far as I know (haven't checked the details), this is perfectly legal,
>> even though I think it's a dumb decision for a company that's in the
>> business of selling chips. I say it's dumb because by not
contributing
>> the changes back, they ended up not benefiting from significant
>> improvements I made to Speex since their forked. Had they done so,
the
>> memory requirement for Speex on dsPIC would be smaller than what they
>> have now and the quality would likely be better. In case there are
any
>> dsPIC developers around, you should know that the current Speex
svn/git
>> version (or 1.2beta2) now has small enough RAM requirement to fit on
the
>> dsPIC, so it probably wouldn't be too hard to create an open-source
port
>> that's actually better (and of course cheaper) than what Microchip
sells.
> 
> There are a couple of us working on it.  We're both also radio
amateurs, so
> we hope to keep our work completly free--so it can be used in open
standard
> software for amateur radio--as well as whatever else people feel like
using
> it in.  Our code will make its way back into the main tree.
> 
> Jean-Marc,  all of your hard work in reducing memory footprint and CPU
usage
> is wonderful.  Thank you, very much.
> 
> Cheers,
> David n0ymv
> 
> 


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

Message: 3
Date: Mon, 08 Oct 2007 17:38:34 +0100
From: Matt Bucknall <matt at mattbucknall.com>
Subject: [Speex-dev] Floating point implementation
To: speex-dev at xiph.org
Message-ID: <470A5D0A.30701 at mattbucknall.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

Hi,

I'm fairly new to Speex, so please forgive me if this question has an 
obvious answer. I'm currently studying the source code to understand how

Speex works and wondered, is there still a floating-point implementation

I could look at as the fixed-point stuff makes it a little difficult to 
see what the code is doing.

Regards,
Matt.



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

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