[opendtv] Re: Samsung Rep admits HDMI won't support 1080p until v.1.3
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: opendtv@xxxxxxxxxxxxx
- Date: Thu, 10 Nov 2005 18:50:48 -0500
At 4:12 PM -0500 11/10/05, John Golitsis wrote:
>I've got a dual 2.5 G5 with a 2.1TB XServe RAID, so I'm okay on the
>hardware side. For source material, I'd generate a Maya sequence to
>1920x1080 resolution.
>
>I have a ready-to-go 1 minute sequence with test clips from
>Panasonic, so I'm just now rendering that out to H.264 at 1920x1080
>at 15Mbps.
>
Cool.
So the Apple h.264 codec will let you encode 1080@60P?
This could be interesting.
Regards
Craig
>On 10-Nov-05, at 7:29 AM, Craig Birkmaier wrote:
>
>> An interesting question.
>>
>> There is no interframe codec that will support 1920 x 1080@60P that I
>> am aware of, so you would need to use either uncompressed files or
>> some form of intraframe compression to lower the bit rate to storage.
>>
>> Today you can work with 1920 x 1080 sources in FCP, at multiple frame
>> rates. But I am not aware of any configuration that could actually
>> play 1080@60P at speed. Currently you need a top of the line G5 with
>> fiber channel arrays to support real time play out of 1920 x 1080@24P.
>>
>> The most common codec for HD quality source in FCP is the Panasonic
>> DVCPro HD codec that has a bitrate of 100 Mbps; this codec can
>> support 1920 x 1080 @30i/P. But most people are converting their HD
>> source to uncompressed when they are editing in FCP.
>>
>> So 1920 x 1080 x 60 = 1.24 billion samples per second to storage. If
>> each sample (Y, R-Y and B-Y) are 10 bits you are looking at something
>> in excess of 3 Gb per second for storage. With H.264 you may be able
>> to bring this down to a few hundred Mbps without any visible
>> artifacts, however I do not know if Apple will let you use the H.264
>> codec at this level of resolution.
>>
>
>
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