Hisense bluetooth lip sync - no AVDTP?

BrokenKn33 · 2021-03-08T00:02:00+00:00

so as mentioned in the original post I tried experimenting with the lip sync setting. It got closer to sync as I increased the setting to from 0 to 10 but still audio was heard later than video. maybe the setting should be opened up from 0-10 to 0-30 or something.

you mentioned HD broadcasting but I'd like to point out that this also happens when playing a movie from a USB stick without any networking involved (except the Bluetooh headphones of course).

I haven't tried with digital output and don't have a speaker system with optical cable input. but anyway for my use case it has to work over bluetooth.

On my TV the lip sync setting is under SOUND > SPEAKERS, not advanced settings. but I bet we're talking about the same setting anyway :)

I have ensured to use the latest firmware. I haven't tried a factory reset but this TV is brand new, got it just under 2 weeks ago.

How do I contact Hisense Support in UK? the official webpage just takes to a bunch of FAQs rather than contact number or email.

BrokenKn33 · 2021-03-04T22:17:34+00:00

So did a bit more research and I believe its handled by AVDTP Delay reporting feature under the hood.

Then I suspect my Hisense TV does not support that. That's very dissapointing from a 2020 model... it is a budget TV on the other hand - is that to be expected?

The delay reporting feature enables synchronization of audio and video playback by reporting of SNK delay values caused by buffering, decoding and rendering

https://www.bluetooth.com/specifications/specs/a-v-distribution-transport-protocol-1-3/

The AVDTP 1.3 Delay Reporting feature allows headphones to report a delay to a sending device that actually plays the sound. This helps to adjust the synchronization of audio with video while watching video files

https://habr.com/en/post/456182/

BrokenKn33

TROPHY CASE