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Search: Keyword(s): ; Posts Made By: sspears
Forum: LCD Flat Panel Displays   05-24-2016, 11:29 AM
Replies: 19,767
Views: 1,496,817
Posted By sspears
In Joe's (Kane) Home Theater Geeks podcast he...

In Joe's (Kane) Home Theater Geeks podcast he talks about seeing banding in PQ and thinks that 10-bit SDR is better. I am wondering if it is because he has the HDMI UHD Color set to off. I am hoping...
Forum: LCD Flat Panel Displays   05-23-2016, 09:20 AM
Replies: 19,767
Views: 1,496,817
Posted By sspears
To qualify my comment about the gamut being...

To qualify my comment about the gamut being compressed. In HDR, most displays correctly remap the gamut outside of their capability into their capability with a roll-off / remap. (No standard for...
Forum: Display Calibration   05-16-2016, 09:07 AM
Replies: 898
Views: 69,084
Posted By sspears
Just to add to what Ted said, in a worst case you...

Just to add to what Ted said, in a worst case you would need a memory for:

SDR HD 709 and SDR UHD 709. Same memory should work for both
SDR UHD 2020
HDR10 UHD 2020
Dolby Vision
Forum: Display Calibration   05-15-2016, 03:02 PM
Replies: 898
Views: 69,084
Posted By sspears
HDR changes everything. For SDR UHD, it can be...

HDR changes everything. For SDR UHD, it can be 709 or 2020. For 709, current disc mostly works. The Sharpness pattern is being scaled, which makes it more difficult to use.

CalMAN supports HDR as...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-25-2016, 04:54 PM
Replies: 348
Views: 13,076
Posted By sspears
If you are asking if a consumer display can use...

If you are asking if a consumer display can use the same technique as Dolby to achieve greater bit depth than the native, then yes, of course.
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-25-2016, 04:30 PM
Replies: 348
Views: 13,076
Posted By sspears
The demo was on the Dolby PRM, which is a grading...

The demo was on the Dolby PRM, which is a grading monitor. It's around $40k. The Pulsar is not for sale and is only loaned out to studios to use.
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-25-2016, 04:04 PM
Replies: 348
Views: 13,076
Posted By sspears
The Dolby PRM, and Pulsar, can modulate the...

The Dolby PRM, and Pulsar, can modulate the backlight to produce a higher bitdepth. When they demonstrated ICtCp, at HPA, they were able to show how 10-bit ICtCp is equal to 12-bit YCbCr and its an...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-25-2016, 02:37 PM
Replies: 348
Views: 13,076
Posted By sspears
It may have been covered earlier, the threads...

It may have been covered earlier, the threads long, that having a 10-bit panel is not enough. You need high quality processing from start to finish. The gradient on the Samsung is not not nearly as...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-23-2016, 05:05 PM
Replies: 348
Views: 13,076
Posted By sspears
That is probably them trying to keep it as simple...

That is probably them trying to keep it as simple as possible for the masses. There is always that line between what you expose for the masses vs. what you give the enthusiasts who love to turn knobs.
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-23-2016, 05:00 PM
Replies: 348
Views: 13,076
Posted By sspears
It all depends on how fixed function some of...

It all depends on how fixed function some of their processing is. Not sure how willing they are to go back to old displays and make feature changes. First we need the press to write reviews and call...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-23-2016, 04:11 PM
Replies: 348
Views: 13,076
Posted By sspears
Hi Richard, What would you like me to...

Hi Richard,

What would you like me to elaborate more on?

If you look at a display, you have the panel and then all of the electronics in the pipeline of that panel. There are various chips...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-23-2016, 02:29 PM
Replies: 348
Views: 13,076
Posted By sspears
While it is a form of compression, it is not...

While it is a form of compression, it is not quantised compression like MPEG. It is compression via image resizing. If you look at this article and scroll down to the big buck bunny sample image, you...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-23-2016, 02:15 PM
Replies: 348
Views: 13,076
Posted By sspears
This is probably just a typo, but ST2084 is an...

This is probably just a typo, but ST2084 is an EOTF and not an OETF. There is a big difference between them. :) This actually caused a problem with the HEVC spec that will be updated in the next rev....
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   04-23-2016, 01:57 PM
Replies: 348
Views: 13,076
Posted By sspears
There are not looking in the wrong place, but I...

There are not looking in the wrong place, but I have only shared the luminance version of the prototype patterns. You really need luma and chroma to get a full picture. There are various chroma...
Forum: LCD Flat Panel Displays   04-14-2016, 09:12 PM
Replies: 31
Views: 1,504
Posted By sspears
One thing they should start discussing is the...

One thing they should start discussing is the number of zones. VIZIO R65 has 384 zones, which is nice. the LG has over 6-million zones since each pixel is its own zone on an OLED. They should also...
Forum: AVS Forum Podcasts   04-08-2016, 07:12 PM
Replies: 47
Views: 3,236
Posted By sspears
So I wanted to chime in. One of the questions...

So I wanted to chime in. One of the questions that Scott asked Tyler was about light output of current HDR displays based on window size.
...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   03-16-2016, 10:00 AM
Replies: 75
Views: 3,652
Posted By sspears
I have asked which brand it was. Have not heard...

I have asked which brand it was. Have not heard back yet.
Forum: Display Calibration   03-16-2016, 09:58 AM
Replies: 898
Views: 69,084
Posted By sspears
That will have no impact on the black crushing. ...

That will have no impact on the black crushing.

Three things can impact what is described.
1. Gamma. The lower the gamma value (2.2, 2.1, etc...) the faster you come out of black and the more...
Forum: Display Calibration   03-15-2016, 09:52 PM
Replies: 898
Views: 69,084
Posted By sspears
I will respond in more detail tomorrow when I am...

I will respond in more detail tomorrow when I am in front of a computer.

Could be gamma. Coming out too slow and therefore black seems crushed.

What is your backlight set at? How did you set...
Forum: Display Calibration   03-15-2016, 11:52 AM
Replies: 898
Views: 69,084
Posted By sspears
The current disc has 480, 720p and 1080p scaling...

The current disc has 480, 720p and 1080p scaling test patterns that test for three things.
1. Linear light scaling
2. Non-ringing scaling
3. Edge adaptive scaling

It was first attempt at a...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   03-14-2016, 10:29 PM
Replies: 75
Views: 3,652
Posted By sspears
Today we had a customer complain about a couple...

Today we had a customer complain about a couple of pattern generators saying they were not outputting correct levels. He was complaining that Cb and Cr were coming out as 516 instead of 512. After we...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   03-14-2016, 10:40 AM
Replies: 75
Views: 3,652
Posted By sspears
Some MPEG encoder and decoders do clip, but most...

Some MPEG encoder and decoders do clip, but most do not these days. During HD DVD, if you can recall that format, GDMX was doing test encodes of the first five minutes of several movies. Ned Price...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   03-14-2016, 10:11 AM
Replies: 75
Views: 3,652
Posted By sspears
Section 2.2 of BT.656 mentions that only 254 of...

Section 2.2 of BT.656 mentions that only 254 of the 256 8-bit words are usable (or 1016 in 10-bit) to express a signal value.
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   03-14-2016, 08:07 AM
Replies: 75
Views: 3,652
Posted By sspears
I had no trouble sending 1-254 over SDI from the...

I had no trouble sending 1-254 over SDI from the output of a DVD player. (480i) I had both an RP82 and RP56 modified to send 8-bit SDI. This was to a DVD VP50 Pro about 10 years ago. All values came...
Forum: High Dynamic Range (HDR) & Wide Color Gamut (WCG)   03-13-2016, 09:41 AM
Replies: 75
Views: 3,652
Posted By sspears
8-bit gets shifted to 10-bit when transmitted...

8-bit gets shifted to 10-bit when transmitted over SDI, so 1 becomes 4 and 254 becomes 1016, so you have the four SAV and EAV bytes.



I agree with you. Those defining new standards don't seem...
Showing results 1 to 25 of 982

 
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