Motivated by the "mess" that has the VPL-HW30ES Sony and the Blu-ray BDP-S790 Sony bought few days ago.
I hope this post for other projectors, plasmas ... and miscellaneous equipment!
Full range (extended) vs. limited range (Normal)
- Levels (values) below the "black video" 16 are called BTB (Blacker Than Black), referring to the levels (values) video between 0 and 15.
- Levels (values) of white above 235 are called WTW (Whiter Than White), referring to the levels (values) video from 236 to 255.
- When instead of calibrating at 16 to 235 is made to 0 - 255/10 which is calibrated RGB levels (normal or reduced).
- In PC environments and photographic uses all the RGB levels given, from 0 to 255, so that the calibration is different (it is at levels of RGB). Therefore, it should see divisions (steps) beyond 16 and 235.
- Note that the DVDs, but are coded levels (values) between 16 - 235, may have information from 0 - 255.
- HD reduced range is used or, as I said above, the levels (values) video 16 -235. The standard Blu-ray and HDTV standard used as the gamut Rec. 709, which, at present, does not allow the use of full range.
When people HDMI (Silicon Image) set the HDMI specification, laid down some ground rules. In accordance with Section 6.6 of the HDMI 1.3 specification document:
The black and white levels in video components will be either "Full Range" or "Limited Range." YCbCr components are always in the limited range while RGB components may be in the full range or limited range
. Using RGB, the limited range is used for all video formats defined in CEA-861-D, with the exception of VGA (640x480) which requires Full Range.
Basically, YCbCr mode, the full signal range (0-255, which can be generated) is not permitted and specifies the values of limited range (16-235 for sources of 8-bit color). At first analog sources and screens were considered 1-15 and 236-255 values, but merely YCbCr 16-235.
That said, we need to download and burn on a blank DVD, this disc
calibration is free. The test time is 1 minute.
With the onscreen menu, go to "Luma Chroma" and select the pattern "BT B". We got to stop the shine and we should see one of the following screens:IMAGE BTB (0 - 255)NO IMAGE BTB (16 - 235)
What are these images?
Before you do anything in a calibration, the first thing is to check the range in which we move, ie, BTB = 0 - 255 or without BTB = 16 to 235 along the entire chain of visualization.
My chain: all sources (configured for the range 16 - 235) entering the AV receiver that I have it in "Through = Pass through (or pass-through)," the AV receiver output enters the Lumagen that I have in video mode (16 - 235); Lumagen outputs go to the projector (this is for free!
) and plasma, respectively.
For example, if I put the Blu-ray what I see NO need to carry BTB. If you have to go back and check where it is misconfigured. This means that all elements must, where possible, set the same way.We go with the Sony BDP-S350Understandably in RGB (0 - 255) is where I have no BTB ... Explain it to me!We go with the Sony BDP-S790Here it is 'pa pee and take no drop
'. There is no way to remove the BTB ... Of court!, Or the projector can (no option) or the player can (look like 2 options have been removed RGB).Come to the Lumagen Radiance XS
These last two images correspond to the reproduction of Sony BDP-S790 with the Lumagen.
As we see We solve "aberration" in the Lumagen changing the video level by the level of PC!!
Look!, The player sends the video signal in the range of PC (0 - 255) that reaches the projector and this, because yes, the switch to low range (16 - 235). Never! had seen the same or similar. What impotence! ...
Yes I have not the Lumagen I do? Or change the player, and to wait for luck, or change your projector to avoid greater evils.I wish that we have the Sony VPL-HW30ES particularly like us to contact each Sony so they know and rectify this anomaly. I remind you that the 'Pearl 2005' had the option to choose the range to solve these problems.Edited by carpantata - 6/27/12 at 12:58pm