HDSDI at 4:2:2 versus HDCAM 3:1:1

 
down load HDSDI Wide shot Toys


Below HDCAM Wide shot Toys

 
Technical details
The HDSDI image recorded from Evertz adapter on f900 direct to HDSDI input on Xpri edit system. Frame grab then taken from disk,
HDCAM image taken with f900 (a hour later hence the cell phone continuity!) HDCAM tape played into xpris from HDW 2000M deck. Frame grab taken from Xpri.
Burnt onto CD, imported into imac cut and pasted without grading on Adobe photo deluxe.
You will notice that there is luminance difference between the HDSDI and HDCAM. This should be taken into consideration in a first glance comparison. It is possible to tweak either images to match. The cause was a combination of slightly different exposure and output from HDSDI.
This was not a scientific test, but a means of creating some interest in the difference between HDCAM and HDSDI. With SR recording possible soon what is the difference between 4:2:2 and 3:1:1 will it be worth it? SR will be compressed.
Also there is a difference between watching a frame grab on a computer monitor and watching a moving picture either on a monitor or transferred to film!
However whatever medium the audience watch, the important issues are;
Color Depth: what is the difference between 4:2:2 and 3:1:1?
Resolution: HDCAM is sampled from 1920 to 1440 then compressed, whereas HDSDI is one to one no sampling or compression.
Compression artifacts: HDCAM is compressed HDSDI is not...how does this appear on screen?
 4:4:4 Will Sony SR 4:4:4 really be worth the effort?
 

Enlargements
Broadband users only! these are large 6mb Tiff files that will be downloaded. Open them in an application that can deal with Tiff images
The blow-ups below compare compression, detail and keying issues of section of the frame.
Kangaroos compared
Lions compared
 



Fuji Monitor Calibration

the above was shot on film and graded.



trouble downloading? here are JPEGS of HDSDI shots.
 
email with your thoughts.