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EdgeSync Manual rev 1 | 63
SMPTE Profile
SMPTE 2059 is a standard from the Society of Motion Picture and Television Engineers (SMPTE) that
describes how to synchronize video equipment over an IP network. The standard is based on IEEE
1588-2008. SMPTE 2059 is published in two parts on 9 April 2015:
•
SMPTE 2059-1 – Defines signal generation based on time information delivered by the IEEE
1588 protocol.
•
SMPTE 2059-2 – Defines an operating profile for the IEEE protocol optimized to the needs of
media synchronization.
The new television standard as specified by ATSC 3.0 uses SMPTE and for synchronization via IEEE
1588 v2. ATSC 3.0, also known by the moniker NextGen TV, is a major version of the ATSC standards
for television broadcasting created by the Advanced Television Systems Committee (ATSC).
In PTP::Clock page, additional configuration parameters are provided that are specific to Power Utility
profile as shown below.
Figure 39 SMPTE Profile - additional configuration parameters
Synchronous Ethernet (SyncE)
What is Synchronous Ethernet?
Synchronous Ethernet feature is to help in providing frequency syntonization over packet based
networks using Ethernet. It provides a mechanism to distribute frequency from Ethernet packet
network to Time Division Multiplexed (TDM) circuits and nodes. For this, the (natively asynchronous)
Ethernet physical layer is utilized in a fashion like (natively synchronous) SONET/SDH networks, with
clock recovery and the assist of a new IEEE 802.3 slow-protocol packet called Ethernet
Synchronization Messaging Channel (ESMC). This ESMC message is to convey the reference clock
quality and traceability information in the form of Quality Level (QL). The SyncE feature is considered a
physical layer characteristic unlike PTP which is in higher-layer software.
