settings arrow_forward more_vert arrow_forward Sound arrow_forward Advance Settings arrow_forward Match Screen and Sound
Adjusts the synchronization of the sound from the operational speaker to coincide with the movement of lips on screen. The closer the value gets set to 60, the greater the delay in holding back the soundtrack (voice output) for the image processing to catch up. Asynchronous sound effect occurs when the dialogue runs faster than the lip movement.
Selecting Bypass will instruct TV to directly process the broadcast signal or the sound from a connected external device without any audio delay. The sound may appear racing ahead of the image on screen on account of the time required for the TV to process the input video signal.
When synchronizing of picture and sound on TV screen does not match (lips moving after words spoken), the viewer can directly adjust the sound sync. User can tweak video’s sync and sound output (TV speaker or SPDIF) by adjusting the Audio Video Synchronization.
There are still a lot of content material out there such as infomercials and old TV advertisements that never got updated with any sound delay to prevent asynchronous issues on televisions displaying much greater resolution than the days of analog broadcast TV.
settings arrow_forward more_vert arrow_forward Sound arrow_forward Addtional Settings arrow_forward HDMI Info Audio Format
You can set the audio format for each HDMI input port. When the voice delivered through HDMI does not appear synchronized, set the input audio format to PCM
Since the introduction of HDTV it is not uncommon to notice very obvious terrible lip synch on screen. These incidents mostly occur during advertisement breaks. Reason being that HDTV requires more processing than its predecessor analog broadcast, the audio portion of the signal having remained virtually the same, now, in HD mode some segments have the voice coming across faster than the image causing bad lip synch effect.
Most broadcasters and some advertisers quickly adapted by forcing the sound signal segment through a delay process so that both synchronized picture and sound appear at the same time on screen.
Should this obvious lip sync situation only be noticeable here and there and mostly on some older advertisements and definitely not always, do not adjust your set. Again, some producers have not yet fully understood the move to digital TV and therefore haven’t adapted the process of introducing some.
[Varies by model] Adjust sync of sound that is outputted from TV’s internal speaker. Speed up sound output when moving cursor towards minus sign (-), delay sound output when moving towards plus sign (+).
Control sound sync from external speakers such as LG Home Theatre System, headphone or Surround Sound System connected to optical digital audio output terminal. Speed up sound output when moving cursor towards minus sign (-), delay sound output when moving towards plus sign (+).
Matches video signal on screen and sound from external audio device to perfect synchronism without any video or audio delay. Again, depending on how long it takes to produce the image on screen the audio signal may jump ahead by a fraction of second and create this very awkward viewing experience.
In Settings Menu arrow_forward Sound arrow_forward Additional Settings arrow_forward AV Sync Adjustment, implement Audio Delay to control AV Sync (range is about 300ms).
Most field environments (depending on various connections, settings risk causing audio delay.
Basically, audio delay during the ARC or Optical Audio output results from various factors such as decoding time, Sound Engine time, output buffer, etc. Also, Audio/Video delay takes place depending on the device connection method.
Audio process time loss can be minimized by directly connecting the audio input device (Blu-ray player, set top box, gaming console, etc.) to the audio output device.
Basically, audio delay during the ARC or Optical Audio output results from various factors such as decoding time, Sound Engine time, output buffer, etc. Also, Audio/Video delay takes place depending on the device connection method.
If the TV is connected to a sound bar or home theater system with an HDMI or optical cable, the sound may be delayed due to the audio processing delays in the sound bar or home theater system. In this case, there is no issue with the TV speakers.
Settings Menu arrow_forward Sound arrow_forward Additional Settings arrow_forward HDMI Input Audio Format and Change format to PCM
Audio process time loss can be minimized since the decoding processing has been changed to a quick mode.
For any individual still experiencing asynchronous audio video (lip sync) issues on their LG Smart TV from hooking up peripheral device to the television and viewing 4K content material, please ensure TV software has been updated to latest version or greater.
Another suggestion is to keep the setup simple and have the Audio Video Receiver or Sound Bar take the role of the entertainment hub instead of the television. To avoid any further aggravation, make sure the external audio equipment’s HDMI output is connected to any HDMI port at the rear of the television at the exception of the ARC port.
The Audio Return Channel (ARC) is designed to get used when all audio video sources are hooked up to the TV for the screen to display the picture while the HDMI ARC input port gets to alter direction sending the audio signal to the external audio device.
If the entertainment hub gets shifted to the audio video receiver or sound bar, there is no point incorporating ARC function in the equation. Instead, every other audio video source such as Internet streaming and/or USB video playability can get to sound to the audio video receiver or sound bar via the Optical Audio Output connection.
Your patience and comprehension in this matter are greatly appreciated
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