SDI redundant paths required a frame sync to switch in to aid with a seamless switch over to a redundant feed. Not so with IP. The SMPTE ST 2022-7 is the standard for seamless protection which is packet-based, so no frame sync is required. Merrick Ackermans (Principal Engineer, MVA Broadcast Consulting) explains how this works with SMPTE ST 2110 streams.
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