– The first of five components in the Physical Layer transmission standard for ATSC 3.0 has been elevated to “Candidate
The ATSC’s Technology Group developing ATSC 3.0 has voted to approve
elevation of “System Discovery and Signaling” technology to
Standard status. This so-called “bootstrap signal” portion
Physical Layer (A/321 Part 1) will be important to the future evolution
of ATSC 3.0.
“The Candidate Standard process for ATSC 3.0 is officially under
said ATSC President Mark Richer. He said the core elements of
the Physical Layer—including the modulation system, error
algorithms, constellations and other aspects—are expected to be
balloted for ATSC Candidate Standard status this summer. (See “ Q&A: Mark Richer on ATSC 3.0 Progress. ”
The ATSC is in the process of developing the next-generation ATSC 3.0
terrestrial television broadcast standard with advanced performance and
functionality made possible by new technologies and strategies. This
next-generation standard must provide improvements in performance,
functionality and efficiency that are significant enough to warrant the
challenges of a transition to a new system.
The bootstrap signal for ATSC 3.0 transmission will remain a Candidate
Standard for nine months while prototype equipment may be built and
tested in advance of balloting for the entire system. The TG3 Candidate
Standard ballot for this portion of the Physical Layer was issued April
with a May 5 voting deadline.
“Simply put, the bootstrap is a low-level signal that tells a
to decode and process wireless services multiplexed in a broadcast
channel. It’s designed to be a very robust signal and detectable even
at low signal levels,” Richer said.
The bootstrap signal provides a universal entry point into a broadcast
waveform. It employs a fixed configuration (such as sampling rate,
signal bandwidth, subcarrier spacing and time-domain structure) known to
all receiver devices and carries information to enable processing and
decoding the wireless service associated with a detected bootstrap
signal, as well as a flag which indicates that an Emergency Alert is in
“Many other services, at least some of which have likely not yet even
been conceived, could also be provided by a broadcaster and identified
within a transmitted signal through the use of a bootstrap signal
associated with each particular service. This new capability ensures
that broadcast spectrum can be adapted to carry new services in the
years ahead,” Richer said.
The Candidate Standard for the first part of the ATSC 3.0 Physical Layer
precedes next week’s ATSC 3.0 Boot Camp and 2015 ATSC Broadcast
Television Conference, planned for May 13 and 14
at the Reagan
International Commerce Center in Washington.
ATSC 3.0 Boot Camp will be an ideal place for a deep technical dive on
the current status of the standardization effort, from Candidate
Standards that will face real-world trials to remaining elements that
must be investigated and evaluated as the full ATSC 3.0 standard is
finalized this year,” Richer said. The business- and policy-focused
ATSC Broadcast Television Conference, “Tune In to the
review how TV technology is evolving to better serve viewers,
broadcasters, and related industries.
“As a standards-setting organization, we have scores of experts
now to set the standard for ATSC 3.0, the broadcast TV standard that
over-the-air broadcasters will use to deliver new content, reach more
viewers on the go, and enhance the viewing and listening experience with
4K Ultra HD video, immersive audio and mobile services. We fully expect
ATSC 3.0 to be more flexible for broadcasters and more useful to a
connected consumer,” Richer said.
Please let TV Technology know what questions you have about this component of ATSC 3.0.