atledreier
08-15-07, 05:44 AM
Quite a title, eh?
Anyways, I have made some observations and have some questions regarding how image processors treat the input signal in the digital domain.
My HTPC and also my DVD player send out 8bit RGB signals (or Component which is converted to RGB values, I presume).
The RGB Gain and offset controls I have on my projector (BenQ PE7700) have a range of 0-512, implying 9 bit precision.
So far so good.
When I start to calibrate my projector I end up with my red being what I call full range, 0 offset, 512 gain, meaning that my processor send as much red as it can to the chip. Am I right so far?
So my green offset is 14 and gain 425, so that has less signal range, but that equals the same amount of light as the red, so the two primaries are balanced. My blues fall somewhere in between red and green.
Will I have lost signal resolution for my green and blue? Will my green be effectively 7-213?
I have noticed some color banding and posterization with my projector, and I'm wondering if this can be that the processor is running out of precision?
Anyways, I have made some observations and have some questions regarding how image processors treat the input signal in the digital domain.
My HTPC and also my DVD player send out 8bit RGB signals (or Component which is converted to RGB values, I presume).
The RGB Gain and offset controls I have on my projector (BenQ PE7700) have a range of 0-512, implying 9 bit precision.
So far so good.
When I start to calibrate my projector I end up with my red being what I call full range, 0 offset, 512 gain, meaning that my processor send as much red as it can to the chip. Am I right so far?
So my green offset is 14 and gain 425, so that has less signal range, but that equals the same amount of light as the red, so the two primaries are balanced. My blues fall somewhere in between red and green.
Will I have lost signal resolution for my green and blue? Will my green be effectively 7-213?
I have noticed some color banding and posterization with my projector, and I'm wondering if this can be that the processor is running out of precision?