What does Lip synchronisation mean?
Lip synchronisation is the timing relationship between the picture and matching sound. A constant early or late offset differs from drift that grows over the course of playback and may require a different investigation.
Why it matters
Players, televisions, receivers and wireless audio routes can each introduce delay. A correction in one device can interact with another, so change one control at a time. Use a visible speaking scene or a sharp matching action, not distant crowd sound, as the reference. Delay controls use different signs and may not support advancing audio when it is already late.
A practical example
If speakers are in sync but wireless headphones are not, note the route difference before saving a global correction. A setting that fixes headphones may make normal television sound wrong, particularly on a shared device used with several output configurations.
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Related terminology: Linear television, Live edge.
For practical setup and troubleshooting, browse the journal or support guides.