24fps Content Sources - Blu-ray Forum

geoperknis · 06-26-2007, 04:31 AM

I appeal to the experts. I've been doing a lot of reading for a long time but never has any CE journalist answered the following questions adequately and thoroughly.

Will HD content providers (the movie studios and broadcast/cable/satellite networks) provide BluRay, HD-DVD, and ATSC programming containing true 24fps film content? Or do the tuners, set-top boxes, and disc players "create" a 24fps digital output bitstream "artificially", in which case, what is the point of having the HDTV monitor capable of displaying at 72Hz or 120Hz a tripled or quintupled 24fps bitstream? Is all content available today in actuality clocked at 30Hz or 60Hz "interlaced" or "progressive" frame scan rates (in which case, there is no reason to hold on a display purchase decision until HDTVs can accept a 24fps signal)?

Thank you.

WriteSimply · 06-26-2007, 05:28 AM

Not sure about HD-DVD. Using video processors like DVDO, you can get 24fps using ATSC/NTSC source.

Correct me if I'm wrong here, experts. Film source on BD is encoded at 24fps with 3-2 cadence flags as well. During playback the player checks if you have your video set at 1080p30, 1080i30, 720p30 or 1080p24. If it's 1080p24, the cadence flags are ignored. If it's the others, then the flags are processed.

fuad

06-26-2007, 04:31 AM	#1
geoperknis Junior Member Member since:Jun 2007	24fps Content Sources I appeal to the experts. I've been doing a lot of reading for a long time but never has any CE journalist answered the following questions adequately and thoroughly. Will HD content providers (the movie studios and broadcast/cable/satellite networks) provide BluRay, HD-DVD, and ATSC programming containing true 24fps film content? Or do the tuners, set-top boxes, and disc players "create" a 24fps digital output bitstream "artificially", in which case, what is the point of having the HDTV monitor capable of displaying at 72Hz or 120Hz a tripled or quintupled 24fps bitstream? Is all content available today in actuality clocked at 30Hz or 60Hz "interlaced" or "progressive" frame scan rates (in which case, there is no reason to hold on a display purchase decision until HDTVs can accept a 24fps signal)? Thank you.

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06-26-2007, 05:28 AM	#2
WriteSimply Blu-ray Ninja Member since:Sep 2006 Location:Kuala Lumpur, Malaysia	Not sure about HD-DVD. Using video processors like DVDO, you can get 24fps using ATSC/NTSC source. Correct me if I'm wrong here, experts. Film source on BD is encoded at 24fps with 3-2 cadence flags as well. During playback the player checks if you have your video set at 1080p30, 1080i30, 720p30 or 1080p24. If it's 1080p24, the cadence flags are ignored. If it's the others, then the flags are processed. fuad

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