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Discussion Groups | Audio Signal Processing | Digital Voice channel Mixing(conferencing) - Doubt in the Requirements!

Technical discussions related to Audio Signal Processing (digital effects, acoustics, noise reduction, musical signal processing, etc).

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Digital Voice channel Mixing(conferencing) - Doubt in the Requirements! - Ulrich Prakash - Aug 7 2:39:00 2002

Hi all,

We are going to undertake a project on "Implementation of a Voice Channel 
Mixer using DSP".

In this project,we try to conference 2 or more voice channels.These voice 
channels are first converted into digital(using A/D).Then they are 
digitally mixed and reproduced at the user-end(D/A is done here).
Here we propose to implement this Digital MIXER using DSP.

As we are new to DSP,we require some help.
For this,I have a few queries on the MINIMUM Requirements(equipments) for 
this...

1) Is Fixed point DSP sufficient to implement this or Is a floating point 
DSP required?

2) What is the minimum RAM that we require in the DSP Kit(we should buy)to 
implment/run this Mixer code?

3) Is the C5416 DSP Starter Kit enough to do our project?
(http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TMS320VC5416)

Please give your suggestions,which would help us in starting the project,
as we have not yet decided which Kit to buy so far........

Thanks in advance,
Prakash.

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Re: Digital Voice channel Mixing(conferencing) - Doubt in the Requirements! - Al Clark - Aug 7 11:01:00 2002

At 01:39 AM 8/7/2002, Ulrich Prakash wrote:
>Hi all,
>
>We are going to undertake a project on "Implementation of a Voice Channel
>Mixer using DSP".
>
>In this project,we try to conference 2 or more voice channels.These voice
>channels are first converted into digital(using A/D).Then they are
>digitally mixed and reproduced at the user-end(D/A is done here).
>Here we propose to implement this Digital MIXER using DSP.
>
>As we are new to DSP,we require some help.
>For this,I have a few queries on the MINIMUM Requirements(equipments) for
>this...
>
>1) Is Fixed point DSP sufficient to implement this or Is a floating point
>DSP required?
>
>2) What is the minimum RAM that we require in the DSP Kit(we should buy)to
>implment/run this Mixer code?
>
>3) Is the C5416 DSP Starter Kit enough to do our project?
>(http://focus.ti.com/docs/prod/productfolder.jhtml?genericPartNumber=TMS320VC5416)
>
>Please give your suggestions,which would help us in starting the project,
>as we have not yet decided which Kit to buy so far........
>
>Thanks in advance,
>Prakash.
>

16 bits fixed point is fine for speech applications. Most speech 
applications are done this way. We have products that may be very suitable 
for your application. Our DSP-8300 modules consist of an ADI ADSP-2186M, a 
stereo AC'97 audio codec, and a flash based loader. Details are on our web 
site.
	Al Clark
Danville Signal Processing, Inc.
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