Lip-Sync Tolerance Cheat Sheet

One page: ITU-R BT.1359, EBU R37, ATSC IS-191 thresholds with the sign convention, plus the frame conversions at 24/25/30 fps.

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Book cover: Audio for Video, Volume 5 of the Fora Soft Video Engineering Handbook

The book · Volume 5 of 7

Audio for Video: A Complete Guide to Sound in Video Products: From Jitter Buffers and Lip Sync to Atmos, Quality Metrics, and Neural Codecs

This lip-sync tolerance cheat sheet lists ITU-R BT.1359, EBU R37 and ATSC IS-191 thresholds with frame conversions at 24, 25 and 30 fps. Volume 5 explains why offsets appear and how to hold them: lip sync, timestamps and clock domains, jitter buffers and NetEq, and drift through the delivery chain. Written by Nikolay Sapunov, CEO at Fora Soft.

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