This document describes the system discovery and signaling architecture for the ATSC 3.0 physical layer. Broadcasters anticipate providing multiple wireless-based services, in addition to conventional broadcast television in the future. Such services may be time-multiplexed together within a single RF channel. The bootstrap provides a universal entry point into a broadcast waveform. The bootstrap employs a fixed configuration (e.g., sampling rate, signal bandwidth, subcarrier spacing, time-domain structure) known to all receiver devices and carries information to enable processing and decoding the wireless service associated with a detected bootstrap. This capability ensures that broadcast spectrum can be adapted to carry new services and/or waveforms for the public interest to continue to be served in the future.
Download current version: A/321:2023-03, “System Discovery and Signaling”, 31 March 2022. This version of the Standard is normatively referenced in A/300:2023-03.
There are multiple versions of this document. Please be sure to download the desired version. For amendments, the text includes a list of changes, the rationale for the changes, and compatibility considerations.
Download A/321:2016, “System Discovery and Signaling”, approved 23 March 2016. This document is referenced by A/300:2019, A/300:2020, and A/300:2021.
A/321:2016, dated 23 March 2016, was approved and adopted by reference into the U.S. FCC Rules 47 CFR § 73.682. In subsequent versions of A/321, normative and informative references to other ATSC standards and recommended practices have been updated to reference current version documents. No other changes have been made.
Download A/321:2022-03, “System Discovery and Signaling”, 31 March 2022. This version of the Standard is normatively referenced in A/300:2022-04.
Subscribe to The Standard, our monthly newsletter, to stay up-to-date with ATSC news and events around the world.
Advanced Television Systems Committee, Inc.
1300 I Street NW, Suite 400E
Washington, DC 20005
Do you have questions about ATSC?
The Advanced Television Systems Committee, Inc., is an international, non-profit organization developing voluntary standards and recommended practices for digital terrestrial broadcasting. ATSC member organizations represent the broadcast, broadcast equipment, motion picture, consumer electronics, computer, cable, satellite, and semiconductor industries. ATSC also develops digital terrestrial broadcasting implementation strategies and supports educational activities on ATSC standards.