From: Matt Porter <mporter@kernel.crashing.org>
To: Bora ?ahin <bora.sahin@ttnet.net.tr>
Cc: Torben Vinther Schmidt <mariachi@itcampus.dk>,
linuxppc-embedded@ozlabs.org
Subject: Re: [linux-cirrus] Re: Cirrus Logic MaverickCrunch support
Date: Tue, 1 Feb 2005 09:33:52 -0700 [thread overview]
Message-ID: <20050201093352.A30421@cox.net> (raw)
In-Reply-To: <3116599689.20050201160957@ttnet.net.tr>; from bora.sahin@ttnet.net.tr on Tue, Feb 01, 2005 at 04:09:57PM +0200
On Tue, Feb 01, 2005 at 04:09:57PM +0200, Bora ?ahin wrote:
> Hi,
>
> Torben> I'm fairly sure that decoding of
> Torben> mpeg2 video in most cases would be too slow to consider without the help
> Torben> of some kind of graphical decoder chip.
>
> Unless you use some powered CPU. As it would require to give an example, MPC8540(667-800 MHz) from
> PPC family seems ideal for it as a SoC solution...
Even then, this depends completely on what else the platform has to
do as well as what profile/level of MPEG-2 you are decoding. Something
like a ~800Mhz e500 core has no chance of handling a main profile high
level MPEG-2 stream for playback (typically 720p/1080i video). A high-end
(1.45Ghzish) 7457 with an optimized altivec mpeg2 software decode library
and a video card with iDCT assist is about the minimum PPC for these
applications.
This is why most consumer products are using something with a decoder,
like the integrated one in the IBM STBxxxx chips or the Sigma Designs
decoders.
-Matt
next prev parent reply other threads:[~2005-02-01 16:33 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <528646bc0501191635b1d318a@mail.gmail.com>
[not found] ` <41EF3626.4060502@kegel.com>
[not found] ` <528646bc05012715092fd0c5ad@mail.gmail.com>
[not found] ` <1849856903.20050130181456@ttnet.net.tr>
[not found] ` <528646bc05013107535a422f16@mail.gmail.com>
[not found] ` <opslg6nunu49uzoa@localhost>
[not found] ` <16211604486.20050201144642@ttnet.net.tr>
[not found] ` <opslirxnwd49uzoa@localhost>
2005-02-01 14:09 ` Re[4]: [linux-cirrus] Re: Cirrus Logic MaverickCrunch support Bora Þahin
2005-02-01 16:33 ` Matt Porter [this message]
2005-02-01 17:03 ` Stefan Nickl
2005-02-01 18:19 ` Re[2]: " Bora Þahin
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