PTP (IEEE 1588)

PTP (Precision Time Protocol), defined by IEEE 1588, synchronizes the clocks of devices across a network to sub-microsecond precision. In IP-based broadcast facilities it provides the common timing reference that keeps separate audio and video streams aligned, and it underpins standards like SMPTE ST 2110 and AES67. It solves clock drift between sources, though not processing latency, which must be managed separately.