Search found 60 matches

by Arkady Bolotin
28 Jul 2010 14:27
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Re: xvColor and AX2000

I hear you, Steve; you do not have to apologize. Usually I care only for what I did personally but the NX5U/AX2000 isn’t my creation (I wish I would make something similar in my life). I just purchased the camera, why should I defend its design and merits. So, let’s continue our lecture on xvYCC col...
by Arkady Bolotin
28 Jul 2010 11:19
Forum: Panasonic Hi-Definition camcorders
Topic: Panasonic HDC-SDT750 consumer 3D camcorder
Replies: 11
Views: 10246

Re: Panasonic HDC-SDT750 consumer 3D camcorder

In one word – it’s a real disappointment… Common, instead of two lenses for two stand-alone sensors (or one but split-image sensor) Panasonic offers a conversion lens which cuts in half the horizontal resolution and down in 17.5 times the light to the image processor! But above and beyond, the paral...
by Arkady Bolotin
27 Jul 2010 18:07
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Full (Extended) Range vs. Limited Range

I think that the most reason of everyone’s confusion in the previous topic was misunderstanding and misinterpreting of some basic terms and notions of analog and digital video. So, allow me to clear some of them. Let me start with the very basics. Analog video levels are typically measured in IRE. F...
by Arkady Bolotin
27 Jul 2010 00:05
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Re: xvColor and AX2000

To Steve …I'm not sure that it is unless the Sony professional range is going over to consumer microphone sockets like 3.5mm. I doubt that pro users would take that very seriously… Seriously, Steve, have you ever seen the NX5U? The B&H technical site reads about it the following: “The HXR-NX5U h...
by Arkady Bolotin
26 Jul 2010 18:29
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Re: xvColor and AX2000

...only for those colors which are illegal in sRGB - they would ordinarily be clipped, and with xvYCC the saturated reds are redder, the saturated yellows yellower, and so on. As jbeale pointed out, the color properties of sRGB-legal colors are unchanged. Again, from BT.709 to xvYCC, only the satur...
by Arkady Bolotin
26 Jul 2010 18:01
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Re: xvColor and AX2000

Steve, once again, the gradation between colors (bits of quantization) and the amount of colors are absolutely independent parameters, one does not necessarily define another. Let me take an extreme example: imagine only two colors in the picture – black and white (actually, only one color -white). ...
by Arkady Bolotin
26 Jul 2010 12:45
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Re: xvColor and AX2000

Again, Steve, you are talking about the gradation between colors – the number of the intermediate steps between two visually distinguished shades of a given color or two different colors. This gradation is responsible for the smoothness of color gradient. Imagine you’re going to reproduce a transiti...
by Arkady Bolotin
24 Jul 2010 16:44
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Re: xvColor and AX2000

The 16-235 range restriction is a legacy of composite video when used for broadcasting to prevent over modulation. Since digital video and editing has been in general use, there has been the option to spread the (albeit limited) gamut over the full 8 bit (0-255) range. The removal of this unnecessa...
by Arkady Bolotin
24 Jul 2010 15:20
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Re: xvColor and AX2000

... it looks to me like you simply increased color saturation... Very well, you’ve hammered the nail! It’s exactly what it is supposed to look like: this new standard – xvColor (or xvYCC) – is all about more colors: 1.8 times more reds, more greens, more blues! Really, as we know, in HSV Color mode...
by Arkady Bolotin
22 Jul 2010 21:33
Forum: Sony AVCHD - High-end / 3-sensor camcorders - NXCAM
Topic: xvColor and AX2000
Replies: 28
Views: 21512

Re: xvColor and AX2000

Here is the video I shot in xvYCC color space: http://www.vimeo.com/13543487.

Please take a look, watch it, try your monitors and video cards. Tell me the results.

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