AES R11-2009 (S2018) PDF Download

The AES Standards Project Report titled "Methods for the Measurement of Audio Video Synchronization Error" addresses the ongoing issue of audio-video synchronization (A-V sync) in television. The report acknowledges that despite the inclusion of timing information in digital television, synchronization errors still persist and can lead to audience dissatisfaction.

The project, AES-X177, aimed to standardize a simple method for measuring lip sync. However, the task proved to be more challenging than initially anticipated, leading to the eventual closure of the project. Despite this, the report brings together two relevant documents produced by the British Broadcasting Corporation (BBC) during the project's duration.

One document focuses on the factors that impact the perception of lip sync, providing insights into the various elements that contribute to synchronization errors. The other document explores the operational practices within a real broadcast chain, shedding light on the practical challenges faced by broadcasters in maintaining A-V sync.