I don't either, at least in MPEG-2 with real time encoders for broadcast. The best way to compare is probably not by wondering if 1080p is more efficient than 1080i but instead contrast it to 720p/60 which is already used and can already have some problems on fast motion with high detail at full ATSC bandwidth.
Now it is probably true that doubling the number of pixels per frame from 720p to 1080p won't really give twice the detail with current lenses and video cameras but it still would be substantially more data and I don't think it would work.
However if MPEG-4/AVC is truly twice as efficient as MPEG-2 then it should more than do the job, with quality more or less matching today's 720p/60 but higher rez (once we actually capture that much).
- Tom John Willkie wrote:
Correction: I wasn't able to find a public document that mentions work on incorporating 1080.60p into A/53, and I believe that it couldn't be done using MPEG-2 codecs within 18-and-change mb/seconds. (Have to reservebandwidth for audio, PSI/PSIP and over-runs.)John Willkie -----Mensaje original----- De: opendtv-bounce@xxxxxxxxxxxxx [mailto:opendtv-bounce@xxxxxxxxxxxxx] En nombre de John Willkie Enviado el: Saturday, November 10, 2007 2:29 PM Para: opendtv@xxxxxxxxxxxxx Asunto: [opendtv] Re: 1080p@60 for MPEG-2 I think that the ITU is actually something of a laggard on this, in the sense that the ATSC has already announced work on incorporating 1080x1920x60p into A/53. 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. John Willkie, who is "fairly certain" that he has read about the A/53 work program in a public document detailing future ATSC work plans.----------------------------------------------------------------------You can UNSUBSCRIBE from the OpenDTV list in two ways:- Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.
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