Ignoring inflated figures from manufacturers and various measurement methods (ANSI versus on/ off) for a second, contrast ratio is essentially the ratio of peak brightness to black level that a television can produce. In a dark room suitable for critical viewing, assuming we peg peak brightness (100% stimulus white) of a TV to SMPTE’s recommendation of 30 foot-Lamberts (too much brighter would look uncomfortable… remember it’s a dark room), it stands to reason that it’s actually the black level that determines the contrast ratio of the television.
The lower the black level, the higher the contrast ratio. The higher the contrast ratio, the greater the dynamic range – here we’re talking about the transition from blacks to shadow detail to midtones to highlight detail and finally to whites – the HDTV can reproduce, which lends more depth and insight to the image.
Strange as it may sound, black level is also critical to colour rendition on a HDTV, simply because the background luminance is irrevocably added to every single colour that needs to be displayed on screen. Think of it this way: greyish blacks will have more “white” than pure blacks. This “white” will be mixed with the colours, decreasing their saturations (for example red may look pink… a bit extreme, but you get the idea) and washing out the image. Only the deepest blacks can allow the colours to flourish with unadulterated richness.
http://translate.google.pl/translate?hl=pl&sl=en&u=http://www.avsforum.com/&ei=0LmiS-_LM8j-sQaUgZXICA&sa=X&oi=translate&ct=result&resnum=1&ved=0CBcQ7gEwAA&prev=/search%3Fq%3Davsforum%26hl%3Dpl%26client%3Dfirefox-a%26hs%3DHE5%26rls%3Dorg.mozilla
l
fficial
I also am the owner of a 50 inch V10. Part of my disgust with Panasonic is the change in response. I first phoned Panasonic in early January. At that time, I spoke with three different people, the last being a "Senior Technical Support" person. All that I spoke with were aware of the problem and I received promises that either there would be some type of fix (to me this admits that this was recognized asa problem) or a replacement for my unit.
When I phoned again in late February for a status update (after the cNet articles), I was told that I do not have a problem and that the set was performing as it should. If they would have sent someone to actually examine the unit, it would be easier to take this type of response. However, when it is a canned response to anyone who now has issues with the picture, this is unacceptable. I stayed on the phone for over an hour attempting to take the issue to someone higher. Everyone read very nicely from the same script.
Jimbo asked if there was a change in picture quality. I can not speak for anyone else, but thereis definitely a change in picture quality that not only I have noticed, but also friends and family. And that has been without prompting. Everyone wants to know if I am trying some new viewing mode with the set.
The picture is not terrible. It is also far from good. It is about on par with my 2006 42px60u. An almost four year old 720p Panasonic plasma. As I said, not bad, but not what I paid $2200.00 for with the intention of keeping the set a minimum of three to four years.
Until Panasonic remedies the problem, they have lost what used to be a very loyal customer who has recomended their equipment to numerous friends and family. I feel worse about my recommendations and other's purchases thn I do my own.
http://news.cnet.com/8601-17938_105...rgetCommunityId=2007&blogId=1&tag=mncol;tback
The lower the black level, the higher the contrast ratio. The higher the contrast ratio, the greater the dynamic range – here we’re talking about the transition from blacks to shadow detail to midtones to highlight detail and finally to whites – the HDTV can reproduce, which lends more depth and insight to the image.
Strange as it may sound, black level is also critical to colour rendition on a HDTV, simply because the background luminance is irrevocably added to every single colour that needs to be displayed on screen. Think of it this way: greyish blacks will have more “white” than pure blacks. This “white” will be mixed with the colours, decreasing their saturations (for example red may look pink… a bit extreme, but you get the idea) and washing out the image. Only the deepest blacks can allow the colours to flourish with unadulterated richness.
http://translate.google.pl/translate?hl=pl&sl=en&u=http://www.avsforum.com/&ei=0LmiS-_LM8j-sQaUgZXICA&sa=X&oi=translate&ct=result&resnum=1&ved=0CBcQ7gEwAA&prev=/search%3Fq%3Davsforum%26hl%3Dpl%26client%3Dfirefox-a%26hs%3DHE5%26rls%3Dorg.mozilla
lfficialI also am the owner of a 50 inch V10. Part of my disgust with Panasonic is the change in response. I first phoned Panasonic in early January. At that time, I spoke with three different people, the last being a "Senior Technical Support" person. All that I spoke with were aware of the problem and I received promises that either there would be some type of fix (to me this admits that this was recognized asa problem) or a replacement for my unit.
When I phoned again in late February for a status update (after the cNet articles), I was told that I do not have a problem and that the set was performing as it should. If they would have sent someone to actually examine the unit, it would be easier to take this type of response. However, when it is a canned response to anyone who now has issues with the picture, this is unacceptable. I stayed on the phone for over an hour attempting to take the issue to someone higher. Everyone read very nicely from the same script.
Jimbo asked if there was a change in picture quality. I can not speak for anyone else, but thereis definitely a change in picture quality that not only I have noticed, but also friends and family. And that has been without prompting. Everyone wants to know if I am trying some new viewing mode with the set.
The picture is not terrible. It is also far from good. It is about on par with my 2006 42px60u. An almost four year old 720p Panasonic plasma. As I said, not bad, but not what I paid $2200.00 for with the intention of keeping the set a minimum of three to four years.
Until Panasonic remedies the problem, they have lost what used to be a very loyal customer who has recomended their equipment to numerous friends and family. I feel worse about my recommendations and other's purchases thn I do my own.
http://news.cnet.com/8601-17938_105...rgetCommunityId=2007&blogId=1&tag=mncol;tback
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