@mirror - bug with DV 23.976 output and LG C8/C9

up side down!
Have a fun

 

We have communicated with dolby. At the same time, dolby and LG engineers also communicated, they confirmed that this is a bug due to LG. And dolby does not recommend us to make compatibility modification to this problem, because it will destroy the compatibility of the HDMI protocol.
Anyway, Before LG fix this problems, we will see if there are any temporary ways to solve it

 

Cool - thank you - So different to the V1 blocks in the LGs - this uses a V0 block:

DV Version: 0
DV DM Version: 2.8
DV Interface: standard DV only
2160p60: supported
YUV422 12bit: not supported
Global Dimming: not supported
Backlight Control: not supported
RED Primary: 0.656, 0.322
GREEN Primary: 0.288, 0.631
BLUE Primary: 0.152, 0.045
MAX/MIN Luminance: 500 / 0.005 nits

 

It is just about vsif

 

Ah right, so definitely an LG thing then - which one?

 

@mirror: Thanks for the good news. We hope for a better DV future

 

Well done, hopefully LG can get it sorted quickly.

 

Yes right LG might firmware fix it for the CX and C9 but everyone else will be SOL.

 

Possibly, they broke HDR mastered at 1,000 nits on C7 and never fixed it ☹️I still think Zidoo might be able to add a simple bypass their end...

 

We need a soluttion for all LG OLED TVs B7/C7(2017), B8/C8(2018), B9/C9(2019), BX9/CX9(2020).

LG will certainly not update the old series 2017/2018.

 

Interesting statement:
- Small companies like Zidoo must solve problems after many years but huge companies like LG don't.
- Small companies must deviate from standards to make interworking with faulty equipment of the big ones work.
If the previous results in incompatibilities with correct implementations of smaller TV manufacturers so what?

Aren't you making your complaints and demands at the wrong door?
Say to LG fix your shit or we never buy your crummy stuff again.

 

Very well put.

 

yes and no, question still remains why other companies products that do LLDV and Dolby Tone mapping don’t have this same problem with LG?

LG may argue their set was compliant with the Dolby Spec when it was released and why are Dolby releasing a processing specification which hasn’t been tested for compatibility?

 

Moment guys, i say LG did not fix a bug in old TVs.

All companies tend to fix problems in new products. This is so.

 

A few remarks on this:
- Yes Dolby Laboratories made a real mess out of DV with the slew of different profiles, many options on those and next LLDV put on top of that.
- When looking at what works and what not this must be done comparing exactly the same video format sources with the same DV profiles and variants being used.
- It is not uncommon these days that manufacturers (their programmers) don't look at the exact specification with all variables and options but instead make it just work. Obvious this may lead to bad products inter-working and the one following the standards not. For me it is far too complex to even guess which is correct and what is not.

Want a perfect example of the last? Just look how NTFS is implemented on Android. They just made it work, but half the features and even structural controls were omitted e.g double FAT is NOT used/controlled just a copy written and Partition support using common variables are ignored totally. Now you understand the many HDD problems experienced regularly.
Oh yes don't blame Zidoo but blame giant Google for that one. In fact Realtek uses the google Android Core implementation as part of their SDK and delivers that as-is to Zidoo (and others).

 

TBH Android is a phone operating system with bolt ons.
Surprised Dolby even got into bed with Android but here we are.

 

Just got the new 2020 Roku Ultra, it runs an RTD1319 SoC, and it has the same exact issue with Dolby Vision and LG TVs. Random blank screen flashes. Seems like Realtek SoCs really don't like LG TVs lol. Maybe now that a larger manufacturer has put out a box with a Realtek SoC with this issue, it might force LG to solve it more quickly.

 

Yes. Roku also found this problem and communicated with Dolby. Dolby also does not recommend making compatibility changes to it until LG solves the problem

 

Still begs the first question I ever asked, how do these Realtek devices get out of Alpha testing like this? LG are the Dolby Vision evangelist’s so what brands are Realtek actually using for testing?