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Panasonic EX750 Owners Thread

I've grabbed a couple of shots from some tv I have on the pvr. They demonstrate the anomalies from uncalibrated settings. However, these are just quite minor colour anomalies, compared to some I've seen.

This is default True Cinema. Note the excess blue. This fellow isn't really purple, but reds get skewed to purple by the presence of excess blue originating from the 10% and below luminance.
20200113_121605.jpg


After calibration, note how much more natural everything is.
20200113_121624.jpg


Below 10%, if you put a 5% screen on, the differences are very stark: red gets real low and green is very elevated, with blue sitting somewhere in the middle. You can't calibrate this 5% level and have to get the 10% as close as possible, but that does not solve 5%.
This is why I think Panasonic have tweaked the 20 and 10% part of the gamma - to make it darker, to prevent some of these anomalies being even more troublesome.

The next one is a common one. Some scenes show people's faces and hair in totally different hues if half is in shadow, due to the overwhelming blue at the 10% mark.
However, if you over-correct this, then it can be bluey green instead (the kind of thing you can see in Jaq's hair at the tips to the lower left, but is a lot starker if you don't get the cal right at 10% - and especially if you correct the gamma to 2.4 at this end, which is why I've chosen to recalibrate and leave the 10% gamma at 0). Also note how much blue is added to the greenish interior of the car.
20200113_122744.jpg


Now after calibration, the hair colour is actually correct and the blue and green artefacts have gone.
20200113_122803.jpg


Again, the next shot is from a very old video which is naturally ropy and quite greenish, but note in the first image how much the blues and greens are out of line with each other, and the fellow's hair especially returns to a uniform colour without the exaggerated green. Again, this is especially prevalent if you get your 10% gamma and white balance even one or two clicks out in More Detailed adjustment.
20200113_113716_cr.jpg
20200113_113807_cr.jpg


I hope it illustrates what I mean when I talk of the blue and green anomalies.
 
Last edited:

80sound

Novice Member
Can anyone help?

Playing Netflix on the TV it won't play HDR content in HDR, but will do 5.1 surround.
Playing Netflix on the blu ray player will play in HDR (maybe forced by the player though rather than original signal, I don't know) but won't play in 5.1 surround (stereo only).

Can anyone help with this.

TV: 50EX750
4k Blu ray: UB420
AVR: Denon AVR-7200w

The players video goes straight into the TV and Audio goes straight into AMP. I have no problem when playing discs.

Update: This morning the Audio worked fine but I still don't get HDR from Netflix thought the TV app. Only the Blu ray Player.
 
Is anyone using default settings and not have the excess blue issues in the dark areas?
I ask because I started using calibrated settings very early on essentially to get rid of the blue issue. And I am wondering if others have had this and it went away by itself over time.
Whenever I calibrate the set and get excellent values on the equipment, it raises an inherent issue in the very low greyscale at 5% which cannot be calibrated out. This causes usually minor colour inaccuracies.
However, colour is most stable using default settings, but is interfered with by the blue issue.
I am wondering if a minor tweak, such as Steve Withers's settings (which is quite good apart from the blue thing) might prove after all to be the best setting for this tv (65 inch version), as long as the blue issue solves itself if left for long enough.
 

Cowan86

Active Member
Is the only way to get hdr10 + is by using a Panasonic 4K Blu-ray player? Thinking about getting one how good is the picture quality using one?
 
Is the only way to get hdr10 + is by using a Panasonic 4K Blu-ray player? Thinking about getting one how good is the picture quality using one?
My 820 player is outstanding in terms of picture quality.
The HDR10+ discs I have are great, especially Alien. However, the HDR Optimizer does such a great job anyway that the whole HDR10+ thing has been a bit of a let down in the end.
You really need a Panny BR player to get the best out of your HDR discs on this tv because some discs need to be tamed to prevent clipping. The Optimizer can be set to tone map a 4000 nit disc to this 500 nit tv and that totally transforms the picture from over bright clipped and washed out to something stunning.
It's a no brainer mate!
 

Cowan86

Active Member
My 820 player is outstanding in terms of picture quality.
The HDR10+ discs I have are great, especially Alien. However, the HDR Optimizer does such a great job anyway that the whole HDR10+ thing has been a bit of a let down in the end.
You really need a Panny BR player to get the best out of your HDR discs on this tv because some discs need to be tamed to prevent clipping. The Optimizer can be set to tone map a 4000 nit disc to this 500 nit tv and that totally transforms the picture from over bright clipped and washed out to something stunning.
It's a no brainer mate!
Cheers for the reply, I think you have persuaded me! Does the HDR look brighter or improved?
 
Cheers for the reply, I think you have persuaded me! Does the HDR look brighter or improved?
It stops white clipping - which means areas that are very bright will be just as bright as before but will reveal the detail. E.g. clouds in a bright sky will look like clouds, instead of a single whited out sheet. You will see lots of detail you never saw before and colours will be richer. But it won't be any brighter - it can't make your tvs panel go any higher.
Basically it corrects what the tv cannot unless you turn the contrast way down on the tv to about 79. That's what I had to do before I got the optimizer.
You will definitely see on discs that are very contrasty that they look much much better.
 

Cowan86

Active Member
It stops white clipping - which means areas that are very bright will be just as bright as before but will reveal the detail. E.g. clouds in a bright sky will look like clouds, instead of a single whited out sheet. You will see lots of detail you never saw before and colours will be richer. But it won't be any brighter - it can't make your tvs panel go any higher.
Basically it corrects what the tv cannot unless you turn the contrast way down on the tv to about 79. That's what I had to do before I got the optimizer.
You will definitely see on discs that are very contrasty that they look much much better.
Heard it’s very good at upscaling blu rays.
 

Lionsy

Novice Member
Once you get your player it may be worth taking a short term membership of somewhere like Cinema Paradiso (think it was the old Love Film) There are only about 30 Blu Rays that have HDR10+ and Cinema Paradiso have around half of them that you can rent. It only costs about £6 a month for 2 disks a month, so once you have exhausted the HDR10+ titles you can simply cancel the membership. Worth having a look around eBay for any HDR10+ films as I picked up Journey to the South Pacific for about £10 that shows off what the TV can do quite nicely.
 
Heard that hdr10+ benefits low nit TVs.
Yes, that's what I was trying to explain.
Our tv has just over 500 nits of brightness. But most HDR discs are mastered to 1000 or more. This means that the tv cannot handle the full range of light output on the disc.
So it has to cap the light at 500 nits.
To do so, it maps the light level over 500 nits down to what it can manage.
It does ok at the 1000 nit level, but any discs mastered at above 1000 will clip. That means it will be overly bright and blow out detail in very bright areas.
The Br820s Optimizer can map discs at way above 1000 nits far more accurately than the tv can down to either 1000 nits or 500 nits. You get a choice in the setup.
You can let the player map to 500 nits and the tv doesn't have to do any work. Or you can map to 1000 nits and the tv will further map it down to 500.
The beauty is with discs like Starship Troopers which are a few thousands nits, it can map it down to 500 without distortion at the bright levels.
It's essentially the same principle in video as the dynamic range compression on av equipment which will limit loudness of very loud audio. However, unlike audio gates or compressors or DRC, which just limit volume that wouldn't ordinarily 'clip' or distort - the HDR video will distort and clip at extremely bright parts.
This is why I am saying the 820 is a no-brainer for this tv. Because it's a low nit tv - 500 nits - it is essential if you want to watch any number of HDR discs without the cliiping distortion that is caused by the tv being unable to output the brightness level of the input.
 

Cowan86

Active Member
Yes, that's what I was trying to explain.
Our tv has just over 500 nits of brightness. But most HDR discs are mastered to 1000 or more. This means that the tv cannot handle the full range of light output on the disc.
So it has to cap the light at 500 nits.
To do so, it maps the light level over 500 nits down to what it can manage.
It does ok at the 1000 nit level, but any discs mastered at above 1000 will clip. That means it will be overly bright and blow out detail in very bright areas.
The Br820s Optimizer can map discs at way above 1000 nits far more accurately than the tv can down to either 1000 nits or 500 nits. You get a choice in the setup.
You can let the player map to 500 nits and the tv doesn't have to do any work. Or you can map to 1000 nits and the tv will further map it down to 500.
The beauty is with discs like Starship Troopers which are a few thousands nits, it can map it down to 500 without distortion at the bright levels.
It's essentially the same principle in video as the dynamic range compression on av equipment which will limit loudness of very loud audio. However, unlike audio gates or compressors or DRC, which just limit volume that wouldn't ordinarily 'clip' or distort - the HDR video will distort and clip at extremely bright parts.
This is why I am saying the 820 is a no-brainer for this tv. Because it's a low nit tv - 500 nits - it is essential if you want to watch any number of HDR discs without the cliiping distortion that is caused by the tv being unable to output the brightness level of the input.
Does it do the same for Netflix?
 
Does it do the same for Netflix?
Yes. The optimizer will work if set to 500 nits. But if set at 1000 it doesn't do anything because the Netflix output is 1000 nits.
But I've not seen any issue with Netflix through the tv as far as clipping goes. I therefore don't use the player for Netflix. The advantage to using the player would be its better colour processing. In which case I do think the player is slightly better. but I usually can't be bothered to engage the player for the slight uptick to colour.
The player also can convert SD to HDR. So if you prefer that, you can watch your HD Netflix in HDR with rec2020 colour gamut. That's ok for some content but not all, so I don't bother with that anymore. I prefer to watch shows as the director intended.
I tend to prefer a darker image, which is unlike yourself. The rec709 SMPTE standard for HD is actually 100 nits, which is backlight at about 11-13 (depending on your calibration settings), in a dark room with 5 nits ambient light. That's what I have my night settings at, and it generally improves the image - makes it more cinematic. But it's a bit dull for daytime, so I have one setting for day at 120 nits.
 

svenjolly

Novice Member
very helpful from a German Specialist:

(You can use the Google Translator)

excerpt:
„...So if you want to get the best picture out of your equipment, there is no way around calibration. However, the measurement sensors and the correct operation of the software or the correct interpretation of the measured values are the key to success. Good sensors also cost a lot of money, which the private person is usually not willing to spend, dealing with the topic also requires a lot of time to familiarize and understand colors in order to achieve the desired result, after all, the picture should be better afterwards and not look worse. Calibration is certainly not a must, but it is definitely worth recommending for the best picture. However, we can only advise against hobby calibration with uncalibrated sensors. It is imperative that a professional - with great expertise - who knows what he is.....“
 

tymspy

Member
Good evening just wondering if someone can give me a little help with this set. I have recenlty purchased a radeon 570 and since buying that card I have had troubles with the TV and HDR. I have my xbox one x plugged into HDMi one and my PC plugged into HDMi two the card supports HDR as does the one X but when using the xbox it no longer shows and when using the pc I regularly have to use the modeswitching option as the picture is all blurry but once I change it to mode 2 then 1 then 2 again it fixed is. The xbox sometimes shows HDR but not always I only seem to have had this issue since getting the new card any ideas?
 

ArcticWolf710

Active Member
Good evening just wondering if someone can give me a little help with this set. I have recenlty purchased a radeon 570 and since buying that card I have had troubles with the TV and HDR. I have my xbox one x plugged into HDMi one and my PC plugged into HDMi two the card supports HDR as does the one X but when using the xbox it no longer shows and when using the pc I regularly have to use the modeswitching option as the picture is all blurry but once I change it to mode 2 then 1 then 2 again it fixed is. The xbox sometimes shows HDR but not always I only seem to have had this issue since getting the new card any ideas?
How does HDR behave from your X Box if you disconnect the PC from HDMI 2 altogether?

Do you still get the blurring and/or need to keep switching from mode 2, to 1 and back to mode 2 to clear it without the PC connected?
 

ozsat

Active Member
Just tried it on the Amazon 4K/HDR Firestick and got the super HDR10+ logo
 

Lionsy

Novice Member
As Ozsat says, all good on the 4K Firestick but NOT on 4K Apple TV, UB820 Blu-Ray, built in TV app or Xbox One X.
If anyone finds any other programmes/films that are showing in HDR10+ please be kind enough to share them with us.
Great find Cornish Pete, did you stumble across it or did you find the info somewhere on the net?
 

CornishPete

Active Member
As Ozsat says, all good on the 4K Firestick but NOT on 4K Apple TV, UB820 Blu-Ray, built in TV app or Xbox One X.
If anyone finds any other programmes/films that are showing in HDR10+ please be kind enough to share them with us.
Great find Cornish Pete, did you stumble across it or did you find the info somewhere on the net?
Cant take credit for the find, although i found it digging through this forum:-Amazon Forum .
Now i have seen it working, i will search prime more thoroughly and will definitely be looking at getting the Panny 820 player.
 

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