Michael Osadciw
Screenwriter
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- Jun 24, 2003
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- Michael Osadciw
Bare with me here, this post is loaded and may not be entirely clear with how I'm saying it:
Some of the things I've been thinking about regarding the new HD formats is in relation to the frame rate the movie will be delivered in.
24fps - if films are transferred at 24 frames per second, that means there will be no doubling up every other frame to get to 30fps as we've been messing around with on NTSC. But I've seen writings that are talking 1080/30i output on players (Toshiba). So the question is are the discs encoded with 1080/24p and the player is adding a few extra frames to bring it up to 30fps? It doesn't stop there. What about the audio?
If an HD film is transferred at native 24fps that means movies will have a slightly shorter runtime than what we are used to on NTSC DVD. That also means we'll hear the audio at it's original speed matching 24fps because it's slowed down ever so slightly for NTSC to match with 30fps. I guess that would have to mean that if an HD-disc is encoded in 24fps and the user sets the player to output for example 1080/30i, the player will have to slow the audio down to match the additional frames that I'm assuming the player will create.
I'd assume that having a film transferred at its native 24 frames per second is ideal for HD disc because adding additional frames on the disc before user-selectable options to change resolutions and frame rates to match a different scan rate is NOT the film as intended. This way, if I have a display capable of accepting 1080/24p I should be able to have that viewing option from the disc.
Many upcoming HD-disc releases could potentially have different frame rates on the one disc. A film could be 24fps and special features could be 480/30i (video camera "on location" making of special features) and 1080/30i (interviews with an HD cam). With different formats, could an HD-player have a "native" output option that sends all video out as originally encoded (leaving it to the display to sync to) or maybe the player will upconvert it all to a single output? If there is only a single-output option, I can't imagine that working if the selection is 1080/24p). Do you understand were I'm getting at? Am I correct on these assumptions?
There has been a lot of talk about HD and resolution, but I thought I'd throw out the frame rate question for some clarification if anyone has any input.
Mike
Some of the things I've been thinking about regarding the new HD formats is in relation to the frame rate the movie will be delivered in.
24fps - if films are transferred at 24 frames per second, that means there will be no doubling up every other frame to get to 30fps as we've been messing around with on NTSC. But I've seen writings that are talking 1080/30i output on players (Toshiba). So the question is are the discs encoded with 1080/24p and the player is adding a few extra frames to bring it up to 30fps? It doesn't stop there. What about the audio?
If an HD film is transferred at native 24fps that means movies will have a slightly shorter runtime than what we are used to on NTSC DVD. That also means we'll hear the audio at it's original speed matching 24fps because it's slowed down ever so slightly for NTSC to match with 30fps. I guess that would have to mean that if an HD-disc is encoded in 24fps and the user sets the player to output for example 1080/30i, the player will have to slow the audio down to match the additional frames that I'm assuming the player will create.
I'd assume that having a film transferred at its native 24 frames per second is ideal for HD disc because adding additional frames on the disc before user-selectable options to change resolutions and frame rates to match a different scan rate is NOT the film as intended. This way, if I have a display capable of accepting 1080/24p I should be able to have that viewing option from the disc.
Many upcoming HD-disc releases could potentially have different frame rates on the one disc. A film could be 24fps and special features could be 480/30i (video camera "on location" making of special features) and 1080/30i (interviews with an HD cam). With different formats, could an HD-player have a "native" output option that sends all video out as originally encoded (leaving it to the display to sync to) or maybe the player will upconvert it all to a single output? If there is only a single-output option, I can't imagine that working if the selection is 1080/24p). Do you understand were I'm getting at? Am I correct on these assumptions?
There has been a lot of talk about HD and resolution, but I thought I'd throw out the frame rate question for some clarification if anyone has any input.
Mike