ANSI SCTE-164-2009 pdf download Emergency Alert Metadata Descriptor
1.0 SCOPE AND INTRODUCTION This document defines a container usable by cable system operators for the delivery of Emergency Alert (EA) metadata into the consumer domain. This metadata is designed to support cable set-top terminals which function as servers of “commercial video services” (CVS) into the home network, by providing preformatted XML-based EA data required by such Digital Media Servers (DMS) in the home. The container, specified as being in the form of an ANSI J-STD-042-A [2] descriptor, is defined only for carriage within the emergency alert signaling message defined in ANSI J-STD-042-A [2]. The metadata carried in the descriptor includes metadata elements conforming to ANSI J-STD-070 [1], which is the standard delivery format for XML-formatted EA data in the home network. Users of this standard should be aware that EAS is a topic which is subject to regulation and is currently under consideration by the Federal Emergency Management Agency (FEMA).
2.0 NORMATIVE REFERENCES The following documents contain provisions, which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreement based on this standard are encouraged to investigate the possibility of applying the most recent editions of the documents listed below.
4.0 DEFINITIONS AND ACRONYMS
4.1 Acronyms
The following definitions and acronyms are used in this document:
ANSI American National Standards Institute
ATIS Association for Telecommunications Industry Solutions
CEA Consumer Electronics Association
DMS Digital Media Server
DTV Digital Television
EA Emergency Alert
EAS Emergency Alert System
IEC International Electrotechnical Commission
IIF IPTV Interoperability Forum
IP Internet Protocol
IPTV IP Television
STB Set Top Box
UCS Unicode Conversion Support
uimsbf unsigned integer most significant bit first
UTF-8 8-bit UCS/Unicode Transformation Format
XML eXtensible Markup Language
4.2 Numerical Formats
This document uses the conventions shown in Table 1 for the representation of numerical values.