I am curious about the sampling modes of the 1DC, and what might explain why the video looks different in them.
The manual says that it has a 1080p internal recording mode taken from a 5184x2916 crop of the sensor, in 4:2:0. That would be a 2.7:1 ratio. What is Canon's image scaling method for this?
Also, in APS-C mode, the camera can record 4096x2160 at 24fps, in 4:2:2, while sending a downsampled 1080i signal to the HDMI port. This might be taken from a second crop of 3840x2160, but the manual doesn't clearly specify that. Is this an exact 2:1 pixel conversion?
Ok, now the real question: is why does the 2:1 downsampling look better than the 2.7:1? Is this due to algorithm choice, and/or is there a reason why the second kind of interpolation is worse? Or is the difference due to color depth?
My apologies if this information is commonly known.
The manual says that it has a 1080p internal recording mode taken from a 5184x2916 crop of the sensor, in 4:2:0. That would be a 2.7:1 ratio. What is Canon's image scaling method for this?
Also, in APS-C mode, the camera can record 4096x2160 at 24fps, in 4:2:2, while sending a downsampled 1080i signal to the HDMI port. This might be taken from a second crop of 3840x2160, but the manual doesn't clearly specify that. Is this an exact 2:1 pixel conversion?
Ok, now the real question: is why does the 2:1 downsampling look better than the 2.7:1? Is this due to algorithm choice, and/or is there a reason why the second kind of interpolation is worse? Or is the difference due to color depth?
My apologies if this information is commonly known.
