Re: [oc] new project...MP3 (audio) core?

[<asoel@ins.itb.ac.id>]

I would love to join with you team on developing dedicated MP3 hardware.
How far is your current development now ?


On Fri, 20 Jul 2001, Damjan Lampret wrote:

> Hi Rob,
>
> Marko and I are working on MP3 player using GNU GPLed MAD and stripped down
> version of OpenRISC (basically using just the DSP part). Result will be
> available as MP3 player in Xess and probably some other FPGA boards as well
> as ASIC version.
>
> This of course doesn't mean you can't start a dedicated MP3 hardware
> project. But if it would be based around a DSP, it will probably duplicate
> what we are already doing.
>
> I'd be interested if someone would be interested to start a dedicated MPEG4
> decoder hardware project (something more dedicated than just using a
> RISC/DSP processor with MPEG4 SW).
>
> regards,
> Damjan
>
> ----- Original Message -----
> From: "Dautel, Rob" <Dautel@AllAmerican.com>
> To: <cores@opencores.org>
> Sent: Friday, July 20, 2001 1:38 AM
> Subject: RE: [oc] new project...MP3 (audio) core?
>
>
> > Hi all,
> >
> > Thanks for the feedback. I like the idea of the data flow engine as well.
> I
> > have also done a data flow engine before and while I could not use much of
> > that code as it belongs to a company, I've been through the process and am
> > familiar with some of what's needed. The question now is would such a
> > project be duplicating any other core project such as some in the DSP
> group
> > or the audio synthesizer core I read about. If not, it sounds fun.
> comments?
> >
> > -rob.
> >
> > > -----Original Message-----
> > > From: Rudolf Usselmann [mailto:rudi@asics.ws]
> > > Sent: Wednesday, July 18, 2001 7:13 PM
> > > To: cores@opencores.org
> > > Subject: Re: [oc] new project...MP3 (audio) core?
> > >
> > >
> > > on 7/19/01 0:44, lior.shtram@flextronicssemi.com at
> > > lior.shtram@flextronicssemi.com wrote:
> > >
> > > > Hi All,
> > > >
> > > > It is true about the patents that only encoders are charged
> > > with royalties and
> > > > decoders you can make for free. Thinking about this block
> > > for a long time, we
> > > > got to think that a hardware approach should not give such
> > > a good benefit in
> > > > any respect (size, power, speed??, flexibility) but if you
> > > think otherwise I
> > > > would like to hear it. Also it would be nice to support the
> > > other standards
> > > > such as Ogg (which is the free one).
> > > >
> > > > I also wanted to add that there is a nice academic work
> > > that was available
> > > > over the net with VHDL code on implementing a decoder for
> > > MP3 half CPU half
> > > > DSP based - take a look - don't remember where it is.
> > > >
> > > > Lior
> > >
> > > I think what we really should do is a data flow engine that
> > > is micro-programmable and can do MP3 and OGG (?) and perhaps
> > > other specific audio encoding algorithms.
> > >
> > > A data flow engine is a part where you examine the operations
> > > you will have to perform and concentrate on implementing them
> > > as efficient as possible. The control logic for the data path
> > > (typically a hard coded state machine) is replaced with a micro-
> > > programmable state machine. Another way of looking at is to think
> > > of a heavily stripped down DSP ...
> > >
> > > Implementing a data flow engine could reduce the power
> > > enormously and should be much smaller than truly general
> > > purpose hardware such as a CPU. And of course it should
> > > be able to run much faster as well.
> > >
> > > Cheers !
> > > --
> > > rudi
> > >
> > >
> > > --
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