View Full Version : Calibration when using a video processor.


John P.
10-28-07, 12:39 PM
My question is simple:

When calibrating brightness, contrast and saturation - you'd want to do that on the video processor, right? So that you could set up different profiles?

But if so - what settings do you set the TV to? I have set the TV to 'middle' (50 on my current set) on all these parameters, thinking that if the TV is set 'neutral' like that, that will make for the best calibration when setting these parameters on the video processor.

But recently I've been thinking; will doing this possibly 'dampen' the picture that the set is capable of showing? Do you in effect cut off some of the available brightness or contrast of the set by doing this for instance, and are only changing the parameters of the image that is being sent to the set?

If so - what would be the best thing to do with the TV's own settings? Should they perhaps be set to max instead, and then the image adjusted down accordingly on the video processor?

Or are the settings on the TV itself only electronic adjustments altering the image coming in anyway, so it wouldn't matter if I did it there or on the video processor?

Hope I'm making myself clear here...

me_myself_and_i
10-28-07, 02:34 PM
When calibrating brightness, contrast and saturation - you'd want to do that on the video processor, right? So that you could set up different profiles?

No, the TV should be calibrated to display the most neutral picture from the video processor (but a little personal prefernce is ok). In case of the VP50Pro there is a test pattern to adjust brightness and contrast on the display. Differences in the sources can be adjusted in the input settings. Saturation (and color calibration in general) is much more complex, maybe someone else can jump in?

But if so - what settings do you set the TV to?

That depends on the TV set... but in most cases the "neutral" setting is way off...

I have a Sony LCD and not only brightness, contrast and saturation have to be adjusted, lots of settings (even shapness!) must be changed to produce a decent picture.

Andreas

John P.
10-28-07, 04:42 PM
No, the TV should be calibrated to display the most neutral picture from the video processor (but a little personal prefernce is ok). In case of the VP50Pro there is a test pattern to adjust brightness and contrast on the display. Differences in the sources can be adjusted in the input settings.

Andreas

Thanks - I'm now very glad I asked!

But, according to the above;

let's say I pick a source (one of them has to be the first) and I calibrate the TV using its settings (with help from the VP50Pro test patterns): should the VP50Pro then be set to neutral first? It would have to be, right?

And then, if another source varied from that first result (it probably would), I would then carefully use the VP50Pro settings in order to rectify the difference in that source?

Am I getting this right?

me_myself_and_i
10-28-07, 06:12 PM
let's say I pick a source (one of them has to be the first) and I calibrate the TV using its settings (with help from the VP50Pro test patterns)

That's the wrong approach... you don't calibrate a source in the first place. The very beginning is to calibrate the display with the VP50Pro test patterns:

1. Reset settings on VP
2. Find native resolution of your display
3. Adjust brightness / contrast
4. Color cablibration

The *MOST IMPORTANT THING* about this: Do that without a source attached, only with the test patterns. You need to have a stable, reproducable output to your display.

After that you can calibrate your inputs, that should be pretty staightforward. But only change the input settings (picture control)...

Andreas

John P.
10-29-07, 05:47 AM
Thanks.

I think you misunderstood me a little bit though; what I meant to say in the part you quoted, was:
let's say I pick a source (one of them has to be the first) and I calibrate the TV using the TV's adjustments (with help from the VP50Pro test patterns)

I could have been clearer in my reply. But I think I get it now.

Thanks for the replies.

Heh - I see now that if I had read the manual a little more closely, I would have known all this.