A1 HDV vs. Uncompressed Color

I think its D3 signal. That is 1440x1080 on the analog component, the XHG1 gives 1920x1080 on the SDI.
 
The difference in color contrast is alot better in the uncompressed one. Notice the difference between the girls face and the red toy, both have alot of red, but the uncompressed one looks like two totally different shades of red. Whereas the hdv one looks kinda mushy-the-same.
 
I've noticed improved reproduction of reds, in particular, with uncompressed capture. What you're looking at is a photojpeg 4:2:2 frame from a Sheer capture. (uncompressed quality)

But I gotta say, the HDV is pretty dang good for how compressed it actually is.
 
Thanks for posting this. I do agree, the HDV is really good. I do think the analog is a little more film-like but only because I'm analyzing a still frame. If I wasn't watching a "still", the differences would be unnoticeable.
 
You can definitely push the analog footage in CC to more extremes, but again, the HDV holds up well enough for most situations that extreme adjustments aren't necessary.

I will say that you can certainly pull a clean greenscreen key more easily with a true 4:2:2 capture, but even the HDV keys well if you know what you're doing.
 
So.. its not 1440, its pixelshifted and then send -streched- to the analog component as 1920? It probably is.
I need to take another look at it. Page 93 user manual shows a picture with the component terminal out that is D3 1440x1080. Letterbox off. An anamorphic signal that is streched by the device, that was my thirst reaction.

Canon uses a 1440 *1080i CCD clocked at 48hz scanned progressive = 1440*540 24hz. Pixelshifted up to 1920*810 processed 1920*1080 (and stored 1440*1080)

I watched today a live shoot over the analog component on a 42" Tatung LCD tv and it looks stunning. But its 1080i, its not progressive on the analog component. That is what the monitor says. So it looks like the component out digital or analog is 1080i and yes it passed the pixelshift processing. It is streched by the device, the cam itself.
 
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Elton said:
These are uncorrected btw. There is a slight brightness difference between the two for some reason. You'll especially notice it in the reds.

HDV:

1168189847.jpg


Analog Uncompressed:

1168189950.jpg
Click to expand...

elton my man,

you are the only one that has done the magic test of component and hdv comparison with the canon A1 that i can find on this forum

but the links to the images are old and broken

i am thinking of going down that route on a project that will take place all indoors and mostly with a lot of dark areas that will need to be pushed in post color

please if the images are still around, could you post them again

thanks
 
That solution is very interesting. You could probably record Blackmagic MJPEG 422 or DVCPRO HD to an internal 7200 rpm laptop drive. Much cheaper than a AJA I/O HD and less burdensome...although I would definitely find a way to house the card externally.
 
They were just frame grabs, and I don't have them on my system anymore. I do have XL-H1 SDI 4:2:2 clips on my iDisk which is basically the same imaging as the A1's analog uncompressed.
 
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