[Nielo TM]

Could someone please explain how contrast ratio, gamut and color depth combine to create a picture?


I mean, consumer LCDs are 24bit (8 bit per shade) native, that means it can display maximum of 16.7m colors. Now, if you were to increase the quality of the backlight from standard CCFL to LED/WGC-CCFL, you would increase the color range (gamut), but wouldn't that also increase the color depth? So does this mean the LCD can display more then 24bit natively?


How does contrast ratio impact the image? I know it represents the darkest to the brightest color of the image but, the contrast ratio increases when an 8bit image is up-sampled to 12bit. So how is this different from the panel's contrast ratio?




This so confusing! Could someone please explain all this to me lol?


Thank you very much!

 

[PooperScooper]

Contrast ratio has nothing to do with number of colors. Contrast ratio is the light output of the brightest white divided by the light output of black. This will not change if you use 8bits per color component or 50 bits per color component .


larry

 

[Nielo TM]

oh I see! But, up-sampling color depth from 8bit to 12bit allows us to see more detail in a scene, what would call that?


Also, can you please inform me about the first part of the query

 

[Targus]



Quote:
up-sampling color depth from 8bit to 12bit allows us to see more detail in a scene,

Where does that 'extra' detail come from?

 

[Nielo TM]

That's what I want to know! I had a Panasonic DVD recorder with 12bit processor and was connected to SKY STB (8bit). After powering up the recorder, the difference was noticeable. I was able see more detail then then previously could. It was the same with DVD videos.

 

[Targus]



Quote:
That's what I want to know!

If you have 8 bit resolution, and up sample to 12 bit, you're either adding zero data, or interpolating existing data to 'create' new data....there is NO additional detail.

 

[Nielo TM]

The effect was something like this!

 

[irkuck]



Quote:
Originally Posted by XVN5 /forum/post/0


The effect was something like this!

No display at present can show more than 8 bits.

10-bit displays were just shown at the CES.

 

[Gigabit256]



Quote:
Originally Posted by irkuck /forum/post/0


No display at present can show more than 8 bits.

10-bit displays were just shown at the CES.

8 bits per channel you mean? that's 8x3=24 bits total. If they were only 8 bits total, they could only show 256 colors. But 8 bits per channel allows 256 levels each of red, green, and blue for 256^3=16,777,216 total colors.