AVC-Intra and AVCHD Codec Videos

Wow...

Could you specify the two camera models used to create these images? I'd be quite curious to hear that.
 
Retrospective said:
XDCAM HD seems to exhibit coloured noise compared to AVC-Intra.
Click to expand...

If XDCamHD looked that bad on motion generally, you wouldn't have seen nearly a hundred of them at the Olympics last summer. Not saying that I don't feel that AVC-Intra 100 is a better codec. We all know it is. But I've seen HDV outperform what I saw in that video...
 
PerroneFord said:
Wow...

Could you specify the two camera models used to create these images? I'd be quite curious to hear that.
Click to expand...
I doubt there were any camera models used to create those images directly; they probably used a live camera head recording SDI to decks. I don't know, but if I was doing this I wouldn't want to be stuck with the position of trying to compare a 1/2" to a 2/3", etc., I'd just take the best camera head I could get (probably a box camera or an F23 or F35, or if it was a camcorder it'd be something like a 3700 or an F950 or something like that) and run the raw SDI output to a deck. That way you isolate the codec and test only the codec, removing any camera head differences from the equation entirely.
 
PerroneFord said:
If XDCamHD looked that bad on motion generally, you wouldn't have seen nearly a hundred of them at the Olympics last summer. Not saying that I don't feel that AVC-Intra 100 is a better codec. We all know it is. But I've seen HDV outperform what I saw in that video...
Click to expand...


Keep in mind the background is a worst case background. The entire screen changes, meaning that the codec is challenged frame by frame. In easier scenarios it isn't so pronounced and frankly judgin the Olympics on this, well there was nothing at the Olympics like this. And keep in mind that you have a whole broadcasting thing inbetween.

So in summary both of these are challenging as the entire frame changes.

Best,

Jan
 
Well, there was something like this during the olympics, and that was the diving competition. I don't know what the camera originals looked like, but the HD broadcast was *horrible*, the MPEG-2 broadcast fell to pieces during the quick pan down and then the splash turned to mush. Actually another that fell to pieces was the water polo; the splashes rendered the HD broadcast to be completely blocky mush.

I'm sure the camera originals held up better than the broadcast (as is always the way) but those are real-world scenarios where, at least in the HD broadcast, MPEG-2 choked hard.
 
PerroneFord said:
I thought the TGV cameras were at the diving platform...
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Actually all of the cameras at the diving platform were Panasonic cameras (I actually was there) and all were fed back to a switcher. There might have been a camera under a cloak that was something other but the majority of the cameras that I saw at the diving event were Panasonic.

The thing is that in broadcasting it really boils down to bandwidth for the broadcast, so it is all crushed again. I saw so many artifacts during the HD broadcasts, I couldn't stand it. Look at the TIFFs, those are the best for the comps.

Best,

Jan
 
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