AV Delay - PHABRIX

Although SDI feeds hold both video and audio data, it does not mean that the video and audio are correctly in-sync. Referred to as a Lip Sync Error, or AV Delay, the results can sometimes create a noticeable issue for the viewer, especially in broadcast workflows where feeds are encoded.

There is a potential that any active processing equipment can introduce AV Delay, but compensation for this may only be possible as a system solution not on a unit by unit basis. Therefore, understanding the likely accumulated AV Delay is a priority.

PHABRIX’s AV Delay Generation and Analysis option offers an end-to-end solution for the measurement of Audio to Video differential delay through a broadcast system. AV Delay is available on the handheld SxA, SxD and SxE instruments.

The tool provides a real-time update of the differential delay between the video and the selected audio channel pair
Measure the propagation or pipeline delay of either video or audio
Can be used with all Sx supported video formats and frame rates on SDI and AES interfaces

AV Delay Generation:

The AV Delay Generator produces an adapted EBU Tech 3305 AV Sync ‘clapperboard’ Test Pattern. This is compatible with third-party AV delay analyzers such as the LAWO V_pro8

AV Delay Analysis:

Measurement of two AV Delay test patterns is supported:
– EBU Tech 3305
– LAWO V_line AV Sync test pattern

AV Delay Generation & Analysis: Available on the PHABRIX SxA, SxD & SxE handheld instruments

SxA: Portable 3G/HD/SD Generation, Analysis & Video/Audio Monitoring
SxD: Portable dual-link 3G/HD/SD-SDI Generation, Analysis & Video/Audio Monitoring
SxE: Portable 3G/HD/SD Generation, Analysis & Monitoring with Advanced Physical Layer Analysis

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