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Bridge Technologies introduces multi-service AV synchronisation to VB440

Bridge Technologies has announced a new enhancement to the AV Sync function contained within its VB440 production probe. The new multi-service AV sync comparison feature enables frame-accurate synchronisation assessment across multiple delivery paths of the same service.

Designed for live IP production environments where redundancy is critical, but applicable in a range of contexts, the new capability allows engineers to assess and compare multiple flows carrying the same service - for instance, across satellite, SRT, or other IP routes - so that seamless, glitch-free switching can occur when it matters most.

This added functionality builds upon the core of the VB440’s AV Sync Generator feature. Its original function was to act as an innovative “first line of defence” approach to synchronisation between audio and visual components within a single service. In this function, rather than relying solely on packet timestamps, the system embeds machine-readable electronic markers directly into the audio and video signals themselves.

When the complete service is reconstructed at the client, these physical markers are analysed to assess frame-accurate alignment between audio and video in real time. This ensures that synchronisation is measured on the content itself, not just the transport layer. More recently, this capability was expanded to include ancillary data synchronisation, allowing the client to precisely visualise the delta between video and audio and the metadata, including immersive audio. Additional visualisation tools such as rolling shutter simulation, blink-and-beep reference cues, enhance ease-of-use and confidence in synchronisation.

The newly introduced multi-service comparison capability builds on this foundation. In scenarios common to live sport and premium broadcast - where the same service may be delivered via multiple, genuinely independent paths for resilience - those paths inevitably arrive with different timing characteristics. With the VB440, users can now place multiple incoming services onto a shared timeline within the sync client, visually stacking and comparing them against a chosen reference.

Engineers can instantly see frame-accurate offsets between flows, and use this information to adjust delays accordingly, ensuring that switching between sources can happen without interruption. As with all of the VB440, the UI has been designed to facilitate in-the-moment decision making with a seamless workflow: new services can be added to the timeline with the click of a button, where they are stacked in an intuitive workspace so that engineers can undertake even complex multi-path alignment quickly. The addition of APIs also means that users can develop further automation tools to perform alignment, drawing frame-accurate data from the probe to facilitate other sync-related processes.

(Photo: Bridge Technologies)

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