Cees Alons
Senior HTF Member
- Joined
- Jul 31, 1997
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- Cees Alons
David,
On standard TV sets, it's virtually impossible to mix up the odd and even fields, because of the frame sync pulse. In fact, the image would be really terrible when odd and even frames were not "recognized" as such, because the TV set physically draws on odd and even lines, intermittently (which is achieved by having an odd number of lines, so half a frame starts at half a line).
So, in my perception, the 2:2 pull-down is rather straight-forward (both fields belonging to one and the same film frame) and it's the 3:2 pull down that presents a real problem - if the (full-)frame sync isn't supported properly. But, honestly, I never observed a DVD frame with odd and even lines transposed.
Cees
On standard TV sets, it's virtually impossible to mix up the odd and even fields, because of the frame sync pulse. In fact, the image would be really terrible when odd and even frames were not "recognized" as such, because the TV set physically draws on odd and even lines, intermittently (which is achieved by having an odd number of lines, so half a frame starts at half a line).
So, in my perception, the 2:2 pull-down is rather straight-forward (both fields belonging to one and the same film frame) and it's the 3:2 pull down that presents a real problem - if the (full-)frame sync isn't supported properly. But, honestly, I never observed a DVD frame with odd and even lines transposed.
Cees