Dynamic Contrast Ratio Question(s)

[blukibuken]

Hello!

Just wanted to get everyone's opinion on dynamic contrast ratio's.

Do you feel dynamic contrast improves your picture or makes it worse?

Once calibrated do you have it turned on or off?

Is the dynamic contrast ratio something you take into consideration when making a purchase or do you believe it to be a marketing thing?

Feel free to share your opinions! On my set ( A sammy series 6) I have it turned off as I feel it make the image look unnatural.

Greetz!

[Beta Man]

"OFF" for sure here.......


Nice 686s/685s Can't tell which....

[blukibuken]

685's but it's actually just the advertisement pic from B&W, found it to be much more representative than my own crappy camera shots...

[Branden]

dynamic contrast ratios really don't mean anything, they are essentially just 5-10x exaggerations of true contrast ratios to make specs seem more impressive. unfortunately there is no standard for measuring true contrast ratios either, but at least they have a better indication of a TV's performance.
when purchasing, you can essentially ignore DCR. if you can find TCR then great, but still take it with a grain of salt when comparing across different brands.

if your TV has the option to turn dynamic contrast on/off then it's up to you to try it out determine what you like best.

[My_Two_Cents]

Dynamic contrast ratio is NOT a setting. It is the difference between an all white screen and an all black screen, and is used as marketing hype to make LCD displays sound good versus Plasma ANSI contrast numbers. Please read the following article to understand better.

http://www.practical-home-theater-gu...ast-ratio.html

[Branden]

Originally Posted by Ricshoe

Dynamic contrast ratio is NOT a setting. It is the difference between an all white screen and an all black screen, and is used as marketing hype to make LCD displays sound good versus Plasma ANSI contrast numbers. Please read the following article to understand better.

http://www.practical-home-theater-gu...ast-ratio.html

dynamic contrast is the artificial manipulation of the image histogram, it is a setting that can be turned on/off. on my TV it's called Advanced Iris.

[My_Two_Cents]

Originally Posted by Branden

dynamic contrast is the artificial manipulation of the image histogram, it is a setting that can be turned on/off. on my TV it's called Advanced Iris.

Incorrect. Your set may use this term for some kind of contrast manipulation, but that is NOT what dynamic contrast ratio is. Read the article if you choose not to believe me.

[Branden]

Originally Posted by Ricshoe

Incorrect. Your set may use this term for some kind of contrast manipulation, but that is NOT what dynamic contrast ratio is. Read the article if you choose not to believe me.

the article is fine for explaining contrast ratio, but makes no explanation of dynamic contrast or of dynamic vs. true contrast ratio.

if you don't believe me, don't take my word for it (as someone trained in image orthorectification and interpretation), take viewsonic's:


original image:



with DC applied:

source

that graph in the corner is called an image histogram, as you can see it has been manipulated, resulting in a 'cleaner' picture.

[My_Two_Cents]

^^ Branden - I believe we are both right, though talking about different uses of the term "dynamic contrast ratio". I have no reason to doubt what you are saying is correct in the context you are using it. I've never heard it used like that before, but that doesn't mean anything.

As it applies to consumer TV's, the term means what I described above and in the article linked. The simple use of the term "ratio" implies one is comparing something to something else. In this case, an all black screen compared to an all white screen is defined as dynamic CR. Since big numbers tend to attract the uninformed consumer, most LCD manufacturers quote this value, though it means next to nothing in terms of the true contrast ratio (ANSI contrast ratio) of the set where white and black are both displayed at the same time and the light output from each is compared.

Anyway, thanks for the education in the other use of the term. Like I said earlier, I was not aware of that.

[crackinhedz]

Originally Posted by Branden

dynamic contrast is the artificial manipulation of the image histogram, it is a setting that can be turned on/off. on my TV it's called Advanced Iris.

dynamic contrast, as used in the terms by "Viewsonic" is not exactly the same thing as Dynamic Contrast Ratio. One is a setting used to manipulate the picture, the other is an exaggerated ratio.




Just what's so 'dynamic' about contrast ratio anyway?

Vendors want to sell you stuff!