[opendtv] Re: Fw: [Mp4-tech] Which Codec implementation is better [ software basedor Hardware Based ]
- From: "Keith Jack" <kjack2@xxxxxxxxxxxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 9 Feb 2005 11:49:09 -0800
If you're doing on it on a chip, then changing video codecs can be simply
loading new microcode from DRAM after saving a few values. No OS or HDD
dependencies involved.
BTW, if you use more than 50% of your CPU/DSP today to handle A/V decoding,
you'll likely run out of CPU cycles next year. Market requirements are
changing fast.
> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx
> [mailto:opendtv-bounce@xxxxxxxxxxxxx] On Behalf Of Ralph P. Manfredo
> Sent: Wednesday, February 09, 2005 10:59 AM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: Fw: [Mp4-tech] Which Codec
> implementation is better [ software basedor Hardware Based ]
>
> Hi Shanmugam T:
>
> While that is true, A/V sync is more difficult using software
> and requires a
> dedicated CPU or a high performance CPU and/or both if you want to do
> anything other than decode a TV program. Also, if changing
> to a program
> that is compressed using a different algorithm, such as from MPEG-4 to
> MPEG-2, unless the software is very complex, a new decoder
> will have to be
> loaded and started, which will take a little time based on
> the OS, hard disk
> performance, etc. We have done some significant tests and a software
> decoder has never beat a hardware decoder in performance in both video
> quality, A/V sync and in speed of coming on line.
>
> Regards,
>
> Ralph
>
> Ralph P. Manfredo
> President and CEO
>
> rmanfredo@xxxxxxxx
>
> **************************************************************
> **********
> BroadBand Networks Corporation
> 2530 Berryessa Road, No. 237
> San Jose, CA 95050
>
> Phone: 408.988.2060
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>
> www.bbnc.com
>
> Leaders in MPEG-2 and MPEG-4 video over ATM and IP Networks
> **************************************************************
> **********
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>
> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx
> [mailto:opendtv-bounce@xxxxxxxxxxxxx] On
> Behalf Of Donald Koeleman
> Sent: Wednesday, February 09, 2005 5:07 AM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Fw: [Mp4-tech] Which Codec implementation
> is better [
> software basedor Hardware Based ]
>
> >From the mp4 tech list:
> ----- Original Message -----
> From: "Shanmugam T" <Shanmugam.T@xxxxxxxxxxxxxxx>
> To: "Prashant Desai" <prashant.desai@xxxxxxxxxx>
> Cc: <mp4-tech-bounces@xxxxxxxxxxxxxxxx>; <mp4-tech@xxxxxxxxxxxxxxxx>
> Sent: Wednesday, February 09, 2005 5:24 AM
> Subject: Re: [Mp4-tech] Which Codec implementation is better
> [ software
> basedor Hardware Based ]
>
>
> > Hi Prashant,
> >
> > Software based codec has following advantages,
> > i) Code can be ported across many platforms
> without any change or
> > with minor modifications if required. It gives better
> re-usability and
> > time-to-market
> > ii) General DSP or RISC processor in a system, can
> be used for
> > other codecs (audio etc) also.
> > iii) Software updating will be easier than hardware
> modification.
> >
> >
> > Please correct me if my understanding is wrong!
> >
> > Regards
> > Shanmugam T
> >
> >
> >
> > Prashant Desai <prashant.desai@xxxxxxxxxx>
> > Sent by: mp4-tech-bounces@xxxxxxxxxxxxxxxx
> > 08/02/2005 04:54 PM
> >
> >
> > To: mp4-tech@xxxxxxxxxxxxxxxx
> > cc:
> > Subject: [Mp4-tech] Which Codec
> implementation is better
> [ software based or
> > Hardware Based ]
> >
> >
> >
> > Hello All
> >
> > i am new to this digital content would , i would like to know and
> > understand the Pros/Cons of different methods of
> implementation of the
> > MPEG -4 , MPEG-2 decoder is better compared to the other .
>
>
>
>
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