[opendtv] Re: wm trials at different telcos using wm series
- From: "John Willkie" <JohnWillkie@xxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Wed, 18 May 2005 10:41:41 -0700
I'd suggest you start with the SMPTE, since at about that time they were
pondering the VC-1 course of work.. They don't publish much on the public
web, but members get much.
Prashant, there aren't all that many U.S. standards groups in this space:
maybe four.
John Willkie
----- Original Message -----
From: "Prashant Desai" <prashant.desai@xxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Tuesday, May 17, 2005 8:27 PM
Subject: [opendtv] Re: wm trials at different telcos using wm series
>
> A certain US standards group ran a "golden eye" test between H.264
> and VC-1 last year. They tested at HD, SD and sub-SD resolutions.
> In all the video sequences tested, H.264 was either equivalent to VC-1
> or slightly better than VC-1.
> However, my spies at NAB have told me that /all/ of the current H.264
> silicon decoders are buggy. Whichever codec you chose, you should
> start evaluating decoder silicon ASAP.
>
> ..............
>
> Can any one point me to the link where results of these tests have been
> published ......
>
>
> Warm regards,
> Prashant
>
>
> -----Original Message-----
> From: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx]
On
> Behalf Of Gary Hughes
> Sent: Wednesday, May 18, 2005 7:35 AM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: wm trials at different telcos using wm series
>
> That pretty much matches what I saw/heard at NAB too. They
> cost too much and don't work too well (encoders and decoders)
> =20
> My reply to this same discussion on another m/l was:
> =20
> The only demos I've seen were live encoders (HD) showing
> VC1 and AVC side by side at the same bit rate. To my eyes, the
> AVC encoders looked a little better, but they were certainly
> in the same league. Both seemed to be approaching twice the
> performance of MPEG-2.
>
> I've never seen any other claim that VC1 was twice as efficient as
> AVC. Maybe you could make that claim against MPEG-4 part 2 video
> (I'm beginning to wish AVC was MPEG-something-other-than-4), but
> I'd be sceptical about that too.
>
> As to why there are few if any live deployments of VC1 or AVC in
> telcos... no one is shipping set tops in quantity yet and current
> unit prices are on the high side. The cable world is not hurting
> for bandwidth enough to make the transition; the telco guys will
> likely make the leap first (although they are also facing sticker
> shock for set tops and real time encoders).
>
>
> gary
> =20
> Gary Hughes
> Director, Media Engineering
> Broadbus Technologies, Inc.
> ghughes@xxxxxxxxxxxx
> (979)264 7919
> =20
>
> ________________________________
>
> From: opendtv-bounce@xxxxxxxxxxxxx on behalf of Ron Economos
> Sent: Tue 5/17/2005 7:24 PM
> To: opendtv@xxxxxxxxxxxxx
> Subject: [opendtv] Re: wm trials at different telcos using wm series
>
>
>
>
> Ron
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