The server side logic of the "Services Discovery" process, which can either be implemented by a dedicated server or it can reside on an IPTV Application server (thus be collected with other IPTV functions).

See satellite digital audio radio service.

Synchronous Digital Hierarchy

Abbreviation for synchronous data link control. A proprietary, code-independent, link-control protocol.

Standards Development Organization

1. Service Delivery Platform,
2. Session Description Organization.

Software Defined Radio

Standard Definition Television

Service Enablers

1. A checksum, which may be cryptographic, computed over some data to provide integrity for that data [ECMA138].
2. A cryptographic checkvalue that supports integrity but does not protect against forgery by the recipient (i.e., it does not support non-repudiation). When a seal is associated with a data element, that data element is 'sealed' [10181-1].