[opendtv] ATSC approves synchronization standard
- From: Craig Birkmaier <craig@xxxxxxxxx>
- To: OpenDTV Mail List <opendtv@xxxxxxxxxxxxx>
- Date: Thu, 19 Aug 2004 14:03:32 -0400
The ATSC has approved a standard for synchronized transmission
(SFNs). Here is the boilerplate and a link to the standard
WASHINGTON, D.C., August 19, 2004 - The Advanced Television Systems
Committee (ATSC) has approved a standard designed to facilitate the
construction of single frequency network (SFN) transmission systems
utilizing distributed transmission. The new standard defines the
mechanisms for synchronization of transmitters emitting 8-VSB signals
in accordance with the ATSC DTV Standard (A/53C). It also provides
for adjustment of transmitter timing and other characteristics
through additional information carried within the specified packet
structure. Distributed transmission involves the use of a separate
distribution channel to feed each transmitter in an SFN. This channel
can be a conventional studio-to-transmitter link (STL) for
distributed transmitters, or it can be a different broadcast channel
from that on which the transmitters operate, in the case of
distributed translators.
"Distributed transmission (DTx) holds the potential to greatly
improve the coverage and service areas of DTV transmission," said
ATSC President, Mark Richer. Richer further explained that
"distributed transmission systems must be carefully implemented, so
we (ATSC) are in the process of developing a companion Recommended
Practice on the design of synchronized multiple transmitter networks."
ATSC Standard A/110 can be downloaded from
www.atsc.org/standards.html at no charge. This document includes
several informative sections that explain the distributed
transmission concept in general, and synchronization methods in
particular.
The Advanced Television Systems Committee, Inc. is an international,
non-profit organization developing voluntary standards for digital
television. The ATSC member organizations represent the broadcast,
broadcast equipment, motion picture, consumer electronics, computer,
cable, satellite, and semiconductor industries.
http://www.atsc.org/standards/a_110.pdf
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