[opendtv] Re: BBC Demonstrates HDTV Broadcasts over SD Channels
- From: Ron Economos <k6mpg@xxxxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Wed, 22 Jun 2005 03:47:50 -0700
Remember that 1080p is really 1088p. The maximum
MPEG-2 sample rate of 62,668,800 samples/sec is
equal to 1920x1088x30.
When H.264 and/or VC-1 is included in ATSC, 1080p@60
will be allowed.
Ron
John Willkie wrote:
>my bad. I would also note that 1080p at 30 fps (I've done the calculaiton)
>has just under (by a hair) the MPEG-2 limitation for video samples per
>second. I was addressing 1080p at > 30fps.
>
>John Willkie
>
>----- Original Message -----
>From: "John Shutt" <shuttj@xxxxxxxxx>
>To: <opendtv@xxxxxxxxxxxxx>
>Sent: Tuesday, June 21, 2005 11:38 AM
>Subject: [opendtv] Re: BBC Demonstrates HDTV Broadcasts over SD Channels
>
>
>
>
>>John,
>>
>>I point you to the infamous table 3 (now A3) of A/53c and note that 1080p
>>
>>
>at
>
>
>>23.976, 24, 29.97, and 30 frames per second are valid compression formats.
>>
>>Nobody ever mentioned 1080p at 60 fps.
>>
>>John
>>
>>----- Original Message -----
>>From: "John Willkie" <JohnWillkie@xxxxxxxxxxxxx>
>>
>>
>>
>>
>>>Uh, tom, just how will those affordable 1080p pictures be delivered to
>>>people? In other words, what type of transport streams?
>>>
>>>Are you familiar with the fact that 1080p uses more samples per second
>>>than
>>>is permitted by MPEG-2 transport streams? (that being just under 63 MM
>>>samples per second)
>>>
>>>Could you point me to the affordable transport streams that will handle
>>>this
>>>format?
>>>
>>>John Willkie
>>>
>>>
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