----- HDTV Magazine Tips List -----
What a fantastic response!
from the link I posted...
Digital Fixed Pixel Brightness
For this technology you are not setting the black level and instead you
are setting the dynamic range of video processing for the panel.
Digital Fixed Pixel Contrast
For this technology you are setting the dynamic range of video
processing for the panel.
All Digital Displays
While some may provide Day and Night settings remember that the
brightness and contrast controls are set for optimal dynamic range not
the viewing environment.
If brightness and contrast are not set right then you will only make
this inherent artifact far easier to see. When set right the maxiumum
number of bits are in play and another reason why we want at least 10
bit processing within the display with 12 and 14 being even better.
As noted, even in the best of circumstances it will show up, in my case
very intermittent and rare, due to the limitations of the standard.
The performance solution is Deep Color...
For the original poster the solution is a calibration!
Richard Fisher
ISF and HAA certified
HD Library is provided by Techservicesusa.com
Publisher
http://www.hdtvmagazine.com/forum/index.php
[email protected] wrote:
> ----- HDTV Magazine Tips List -----
>
> 1. There is not yet a "Digital Video Essentials" Blu-ray edition. There are major problems trying to get the menu structure to work properly and cleanly on a wide variety of players. Joe has had this problem with every edition including the original laserdisc "A Video Standard." Joe hopes to get it resolved soon. He and his associates are diligent in their efforts. They always pursue creation of a product that effectively serves their customers.
> 2. Since consumer video formats use 8-bit video, you can't get rid of the slight contouring ("steps"). It is inherent in having no more than 8-bit video (256 grey-scale steps). It is rather subtle on the grey-scale test pattern (with the 'smoothly' graded grey scale above and below the two 11-step patterns in the vertical center of that test image) on Joe's Samsung SP-A800 projector fed from his HD DVE test patterns (which he demos from his server). If the problem is obvious from other sources, either there is a display setup/image processing issue, or the sources are data-reducing the video and seriously compromising the image quality they are delivering.
> Having more bits in the playback processing won't help unless there is a lot of DSP interpolating the data between successive steps, or the source material is created with a higher color/grey-scale bit depth, and that bit depth is maintained all the way from creation to display.
> David J. Weinberg
> Chair, AES - DC section
>
www.AES.org/sections/dc/
> Manager, SMPTE - DC section
>
www.SMPTEDC.org
> Associate Editor, "Multi Media Manufacturer"
>
www.MultiMediaManufacturer.com
> Editor, "The B A S Speaker"
> (publication of the Boston Audio Society)
>
www.BostonAudioSociety.org
> 10705 E. Nolcrest Drive
> Silver Spring, Maryland 20903-1006
> 301.593.3230
>
[email protected]
>
>
>
> "Alan Crawley" <
[email protected]> wrote:
>
>
>>----- HDTV Magazine Tips List -----
>>
>>
>>Am I missing it, or is there no DME or equivalent calibration DVD for
>>BluRay?
>>
>>And... can it help get rid of the "steps" I see in shades of grey in
>>darkened rooms? (Panasonic TH-50PHD8UK, w/HDMI 8 blade, visible from all
>>material from both DirecTV HR20-700 and Sony PS3 Blu-Ray)
>>
>>Alan
>>
>>
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