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samsung - 50,000 contrast ratio

by polereaper / December 16, 2007 7:13 AM PST

whats the deal with samsungs new line of tv's i read that
one of them has a 50,000:1 dynamic contrast ratio which would equate
to 10,000 true contrast.
is this hype or for real??

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you taking about their LED LCD's?
by givemeaname / December 16, 2007 7:20 AM PST

Yes, the LED back-lights make for a much better picture, not as good as the Pioneer KUDO, but close. In a few years (2-3) someone will put out a tv (LCD, OLED or Plasma) that can produce a true black with great shadow detail.

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Now the hype begins
by dinox64 / December 16, 2007 8:01 AM PST

From here,some one will take this and then post misguided information on another post,the ball gets rolling and grows out of control. Before long people are talking about something that doesn't exist and it's history.

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That 50,000-1 thing stunned me too until...
by RustyDallas / December 16, 2007 8:12 AM PST
In reply to: Now the hype begins

I read the cnet review pasted below. Real world isn't quite as good as it's advertised stats:

quick aside for the geeks: The discrepancy between the Samsung's black levels showing a fully black screen vs. real program material was supported by further testing. For instance, the Samsung's black screen was immeasurable by our KM CS-200. However, when we looked at a standard checkerboard pattern--which includes both white and black, and so better represents actual program material--the Samsung's blacks were not only measurable, but lighter than the Sony's and the Pioneer's. We suspect the main culprit here is blooming (see below), where the bright white squares next to the darker ones spoiled that absolute black. Either way, these objective tests jibe with our subjective experience, which is that the Samsung gets extremely dark on full-black screens, but that performance doesn't translate to the very best black-level performance with most program material.

Back to Transformers: As the sun set on the tarmac after the mysterious chopper lands, we had a good opportunity to appreciate the Samsung's superb shadow detail. For example, we could make out the camo of the shadowed soldiers and details in the Decepticon's jet engine; it all looked quite natural yet packed with the punch only great contrast can deliver.

We did see one small fly in the black-level ointment, however. The LEDs produced what's known as "blooming," when a bright onscreen item exceeds its boundaries and brightens the dark areas immediately adjacent. When the Transformers title came up in a field of black, for example, or when Earth spun around to be cut off by the black letterbox bars, the black areas next to the lettering and the planet brightened in comparison to the other sets in the room, which exhibited no blooming. In most scenes, however, blooming was difficult to detect, especially outside the letterbox bars, and we never found it outright distracting except when we watched the set from off-angle. We also expected the Samsung, since its LEDs do vary in intensity, to fail our black-level retention test, but it passed with aplomb after calibration; the levels of black and near-black remained constant relative to one another regardless of the brightness of other areas of the screen (blooming notwithstanding).

Sounds like a pretty good TV but not for the price.

Rusty

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The simple and true answer is...
by stuntman_mike / December 17, 2007 1:10 AM PST

that it's all hype. Anytime a manufacturer, any manufacturer, touts the contrast ratio of their sets, you can pretty much ignore it.

There are no industry standards for measuring contrast ratio so they can skew numbers in any way that they want.

That's how you get some TVs saying 10,000:1 and others saying 100,000:1. You would think that the 100,000:1 set is better, but it may not be.

And it isn't lying, they just might have a different criteria for measurement than another company.

Best thing you can do is not put too much stock in contrast ratio numbers.

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