[opendtv] Re: 1080p@60 for MPEG-2
- From: "Hughes Gary-DJWV76" <ghughes@xxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 12 Nov 2007 09:08:33 -0500
> -----Original Message-----
> [mailto:opendtv-bounce@xxxxxxxxxxxxx] On Behalf Of John Willkie
> Sent: Saturday, November 10, 2007 5:29 PM
> Subject: [opendtv] Re: 1080p@60 for MPEG-2
>
> Main Profile@ Main Level (MP@ML) and Main Profile at High
> Level (MP@HL) are existing combinations. The former is
> sometimes called "EDTV" (by some) and the latter is called
> "HDTV". Maximum permissible bit rates (per 13818-1) are
> classified by profile and level. Nothing new is contained in
> this paragraph.
1080p60 exceeds the luma sample rate limit in MP@HL, so you cannot do
1080p60 and be MPEG2-legal without a new level. I'd say that someone has
figured out that their existing codec silicon can run at the necessary
clock rates.
With CE manufacturers scrambling to slap a 1080p label ("I don't know
what that means, but I totally want it") on everything, it isn't too
surprising. If bandwidth is not a major issue, 1080p MPEG2 is probably a
useful option. It would certainly require a lot less computes, draw less
power, generate less heat than 1080p AVC.
gary
Gary Hughes
Video Architect, Advanced Engineering
Motorola On Demand Solutions, MA34
80 Central St.
Boxborough, MA 01719
Email: ghughes@xxxxxxxxxxxx
Office: 978 266 7269
Mobile: 978 339 3615
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