topic Betreff: KD-55XE8596 frame stutter on 50hz content in Android TV

KD-55XE8596 frame stutter on 50hz content

Salty_Wagyu — Thu, 19 Apr 2018 22:41:09 GMT

a number of Sony TVs can't view 1080i @ 50hz correctly. XE8596, XE9005 and probably some others are affected, which you can see a huge thread at AVForums discussing it at length - https://www.avforums.com/threads/sony-xe90-frame-repeats-drops-on-50-59-94-native-content-49xe9005.2132939

Sometimes a stutter can be observed as soon as the camera changes. The only workaround is to use game mode, but this is unacceptable for a premium TV as a lot of television programmes in the UK is broadcasted at 50hz. Why hasn't it been fixed? Absolutely shocking I paid £900 for a larger TV that comes with faults, when an other brand TV I purchased in 2011 for £300 does not have this issue.

I have uploaded a slow motion recording showing this, you can see it at 0:03 and 0:16 seconds.

Betreff: KD-55XE8596 frame stutter on 50hz content

Kuschelmonschter — Fri, 20 Apr 2018 06:07:44 GMT

Interesting. Rtings.com stated that it is exclusive to the XE90, see here:

That’s certainly very interesting. I was able to recreate the same frame drops and cadence issues on our 55” X900E. What’s also interesting is that it appears to be specific to the X900E (our X850E and X930E don’t appear to show the same issues).

That actually puzzled me. Judging from your report I think that it might be due to the level of post processing done by the 2017 line and the weaker X1 (non-Extreme) image processor built into XE85 and XE90.

There is also another Motionflow issue that motion interpolation does not work under specific circumstances (Cinemascope content played via apps, see here). I think that the image processor has simply been maxxed out in recent years.

Betreff: KD-55XE8596 frame stutter on 50hz content

Salty_Wagyu — Fri, 20 Apr 2018 08:46:12 GMT

Yeah I have no idea why rtings say this, I can't reply to that as they do not allow anyone outside the united states to post.

I also checked the back of the TV to make sure it's an XE85 and it is https://imgur.com/a/bWRupP7

Re: KD-55XE8596 frame stutter on 50hz content

Salty_Wagyu — Wed, 25 Apr 2018 16:17:07 GMT

Could Sony or a Sony representative respond on this issue please, thank you

Re: KD-55XE8596 frame stutter on 50hz content

Kuschelmonschter — Wed, 25 Apr 2018 16:29:15 GMT

The Japanese haven‘t arrived in the new information and communication age yet. There is also a rather big thread on German forums, see here. Actually rtings.com stated that Sony is not looking into the issue as there is a solution with the Game mode which disables some motion processing. Well that‘s today‘s Sony.

Re: KD-55XE8596 frame stutter on 50hz content

Sean_Mc — Thu, 26 Apr 2018 15:28:16 GMT

Hi there,

Sony are aware of all of the above including the proposed solution of changing picture mode to "game mode", and are currently investigating this issue.

Cheers,

Sean Mc

Re: KD-55XE8596 frame stutter on 50hz content

Kuschelmonschter — Fri, 27 Apr 2018 08:32:16 GMT

Problem has first been reported to Sony beginning of November 2017, so half a year ago. This is a quote by rtings.com:

Sony explicitly told us they won’t fix the 50Hz frame drop since they mentioned it is hard to fix and there is a workaround (game mode).

Game mode is no workaround in my opinion. It disables lots of valuable video post processing.

I am not happy with this answer after half year. It is just about holding people off. New members might still fall for it. I have been a Sony customer for 2 years and know how stuff works around here...

Re: KD-55XE8596 frame stutter on 50hz content

sijere — Sun, 29 Apr 2018 08:57:53 GMT

Hi,

I have the same problem on my KDL-50W755C TV set. The problem started after the last update (Nougat). When I watch sports particularly Formula 1 (DVB-T S2 1080i @ 25Hz) the fault is constantly visible. With Motinflow on (Standard, Smooth etc.) is much worse. The "game mode" solution is a joke. First passthrough and now this.

Can the failure be included in the list: Android TV - Bugs and Issues. Tnx.

Cheers.

Re: KD-55XE8596 frame stutter on 50hz content

stormyuk — Mon, 18 Jun 2018 14:46:31 GMT

@Sean_Mc wrote:
Hi there,

Sony are aware of all of the above including the proposed solution of changing picture mode to "game mode", and are currently investigating this issue.

Cheers,

Sean Mc

Was there ever an update to thi? Game mode isn't really a suitable work around as if the source is an interlaced source, then the picture "flickers" because it appears that game mode either doesn't or struggles to de-interlace the picture. Photo modes do a slightly better job but its still a kludge.

Re: KD-55XE8596 frame stutter on 50hz content

batee5 — Wed, 20 Jun 2018 13:45:49 GMT

Hi,

The latest update is that Sony UK is still investigating this issue and looking into possible solutions. Has anyone here have this issue and actually tried the game mode setting? If so, did the stutter stop completely?

Regards,

Batee5

Re: KD-55XE8596 frame stutter on 50hz content

stormyuk — Wed, 20 Jun 2018 14:39:09 GMT

@batee5 wrote:
Hi,

The latest update is that Sony UK is still investigating this issue and looking into possible solutions. Has anyone here have this issue and actually tried the game mode setting? If so, did the stutter stop completely?

Regards,
Batee5

Yes, game mode (and for external devices photo mode(s)) removes the frame repeat issue completely (at least on my 49XE9005), the problem is for interlaced sources game mode is awful because it doesn't de-interlace properly so you are left with a flicker on the picture, most noticable on fixed egdes, text, or news tickers. So not a fix.

Photo modes don't allow half the picture processing options or motionflow to be enabled so again, not a fix unfortunately.

Neither is a fix, both are temporary work arounds at best. This has apparently been under investigation for a long time, it was first reported in the 4th quarter of 2017 it appears.

Re: KD-55XE8596 frame stutter on 50hz content

Silverfr — Wed, 27 Jun 2018 09:05:11 GMT

Try to turn On AV/SYNC.

From AVS Forum, this fix the problem:

Hey guys,

in german board "hifi-forum.de" the member gm-film found a solution to fix the 50hz bug. There seems to be a problem with the A/V Sync option for Bluetooth devices that causes the frame repeat/drops (doesn't matter if you actually use bluetooth devices or not). To fix the bug you need to go to the home menu -> settings -> sound -> AV Sync -> "On". -> By using this workaround the frame repeat/drops should be fine.

Re: KD-55XE8596 frame stutter on 50hz content

stormyuk — Wed, 27 Jun 2018 09:12:51 GMT

Yeh, hearing a few reports this fixes it, really good news, really! I have yet to try it out but so far it seems it is a fix.

Re: KD-55XE8596 frame stutter on 50hz content

imcgarry — Thu, 28 Jun 2018 21:55:41 GMT

So having suffered the frame drop ssue i have treid this fix.

I report after watching the football world cup this evening this works!!!

Picture is much smoother like really noticabily.

I can now watch in normal pic mode and everything is so much better.

Word of warning i tried this by just enabling this and foud no improvement. I reset the TV and enabled this then i properly shut the TV down (long press power button on remote) adn then watched TV and magic.

KUDO the the german forums for finding the real fix before Sony!!

Re: KD-55XE8596 frame stutter on 50hz content

stormyuk — Fri, 29 Jun 2018 08:12:06 GMT

Worked fine for me without resetting anything. What I dont like is Sony now blaming user settings, there is still a bug here which needs fixing. Its still a work around.

Re: KD-55XE8596 frame stutter on 50hz content

rickyburlingham — Tue, 21 May 2019 14:34:15 GMT

My KD-55XF8096 has a problem when a camera angle changes during watching programmes (especially BBC one) through a SKY HD box there is a slow motion like movement for a second before picture corrects itself and continues. Has anyone got any ideas how to fix this? I've tried with motion plus on and off with no improvement.

this dont seem to happen on Netflix and programmes and channels with better quality picture than BBC.

Any ideas?

Re: KD-55XE8596 frame stutter on 50hz content

chelsMan88 — Mon, 27 Feb 2023 18:19:57 GMT

Sorry to reply to an old thread but I just changed A/V sync setting from auto to on and it has rectified the problem with frame repeat so I am more than happy. My TV is a Sony X95J 2021 model. It was driving me crazy and I was blaming my Android box lol. Thanks so much.

Re: KD-55XE8596 frame stutter on 50hz content

pabulous — Fri, 19 May 2023 18:36:00 GMT

I can’t believe this is still an issue on Sony TVs. I got the X90S a few weeks ago, a 2022 model, and it is still happening on all built in apps. AV Sync fortunately works, but it is not a practical solution as it significantly increases input lag in games. Why does AV Sync even affect the TV speakers when It is intended for Bluetooth headphones? Sony really need to address this.

Re: KD-55XE8596 frame stutter on 50hz content

Anonymous — Mon, 22 May 2023 15:22:50 GMT

What's mentioned in the thread video stuttering and it's a 2018 thread.
What you mention is related to AV Sync, and that's related to lip sync between audio and video ''if I'm not mistaken''.
So I recommend either staring a new thread with the issue you're facing, or give us more information about what actually is happening, and what's the connected devices to the TV.

Re: KD-55XE8596 frame stutter on 50hz content

pabulous — Thu, 01 Jun 2023 22:09:27 GMT

Yes, AV Sync is intended to correct lip sync, but turning it on has the effect of correcting a video stutter issue.

I have nothing connected to the TV at the moment. I’m just using the integrated apps, and they all have terrible frame drop issues, which are corrected by turning on AV Sync.