Service Description Table
metadata used in Digital Video Broadcasting
Service Description Table (SDT) is a metadata table used in Digital Video Broadcasting systems to describe the television, radio or other services contained in MPEG transport streams provided by the system. The purpose and format of the table is defined in ETSI EN 300 468: Specification for Service Information (SI) in DVB systems.
An MPEG transport stream consists of a sequence of packets. SDTs are contained in packets identified by the packet ID (PID) 0x0011. Such packets may alternatively contain a Bouquet Association Table (BAT) or a Stuffing Table (ST). The type of information carried in the packet is identified using a table ID. The table ID 0x42 identifies the SDT providing information about services contained in the same transport stream as the SDT itself. The table ID 0x46 identifies SDTs providing information about services contained in other transport streams in the same network or system.
The SDT provides the following information about each service:
the transport stream id.
the service id.
whether or not programme schedules are provided in the transport stream.
The public source identifies “Service Description Table” as metadata used in Digital Video Broadcasting. This brief keeps that definition visible, then builds a research path around Service, Description and Table.
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This entry incorporates text from “Service Description Table” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.