| Annex A |
STB | |
| interface between the home television and the cable TV company. |
| New technologies evolving for |
| video games, educational services, database searches, and home |
| shopping. The cable equivalent of the IRD. |
SFN | Single Frequency Network: The SFN technique allows large |
| geographic areas to be served with a common transmission |
| multiplex. All transmitters in the network are synchronously |
| modulated with the same signal and they all radiate on the same |
| frequency. Due to the |
| transmission system (COFDM), signals from several transmitters |
| arriving at a receiving antenna may contribute constructively to the |
| total wanted signal. The SFN technique is not only frequency |
| efficient but also power efficient because fades in the field strength |
| of one transmitter may be filled by another transmitter. |
SI | Service Information: Digital information describing the delivery |
| system, content and scheduling (timing) of broadcast data streams. |
| |
| demultiplex and decode the various streams of programmes within |
| the multiplex. Specified in ISO/IEC 13818[1]. (DVB) |
Single Packet Burst A burst of ASI bytes (either 188 or 204, depending on packet length)
Mode | is contiguously grouped into an |
| Stuffing data is added between the packets to increase the data rate |
| to 270 Mbps. See DVB Document A010 rev. 1, Section B3.3, (ASI) |
| |
Smart Card | A plastic card with a |
| identification, financial transactions or other authorizing data |
| transfer. When inserted into a reader, data is transferred to and from |
| the host machine or a central computer. It is more secure than a |
| magnetic stripe card and it can be disabled if the wrong password is |
| entered too many times. As a financial transaction card, it can be |
| loaded with digital money and used in the same way as cash until |
| the balance reaches zero. The file protocol is specific to its intended |
| application. |
SMATV | Satellite Mast Antenna Television: A distribution system, which |
| provides sound and television signals to the households of a |
| building or group of buildings, typically used to refer to an apartment |
| block. |
SMPTE | Society of Motion Picture and Television Engineers. |
SMS | Subscriber Management System: A system which handles the |
| maintenance, billing, control and general supervision of subscribers |
| to conditional access technology viewing services provided through |
| cable and satellite broadcasting. An SMS can be an automatic (e.g. |
| Syntellect) system where subscribers order entitlements by entering |
| information via a telephone. Alternatively, an SMS can be a manual |
| system, which requires subscribers to speak with an operator who |
| then manually enters their entitlement requests. Some systems |
| support multiple SMSs. |
SNG | Satellite |
SNMP | Simple Network Management Protocol. |
EN/LZT 790 0005 R1A |