TANDBERG EN8000, Справочное руководство

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Glossary
Reference Guide: EN8000 MPEG-4 Part 10 (H.264/AVC) Encoders Page A-13
ST.RE.E10233.1
SI Service Information: Digital information describing the delivery system, content and
scheduling (timing) of broadcast data streams. DVB-SI data provides information to enable
the IRD to automatically demultiplex and decode the various streams of programmes within
the multiplex.
Specified in ISO/IEC 13818[1]. (DVB)
Single Packet Burst
Mode A burst of ASI bytes (either 188 or 204, depending on packet length) is contiguously grouped
into an MPEG-2 Transport Stream packet. Stuffing data is added between the packets to
increase the data rate to 270 Mbit/s. See DVB Document A010 rev. 1, Section B3.3, (ASI)
Layer-2 Transport Protocol.
Smart Card A plastic card with a built-in microprocessor and memory used for identification, financial
transactions or other authorising 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 News-Gathering.
SNMP Simple Network Management Protocol.
Spatial Redundancy Information repetition due to areas of similar luminance and/or chrominance characteristics
within a single frame. Removed using DCT and Quantisation (Intra-Frame Coding).
SPI Synchronous Parallel Interface.
Statistical Redundancy Data tables are used to assign fewer bits to the most commonly occurring events, thereby
reducing the overall bit-rate. Removed using Run Length Coding and Variable Length Coding.
TAXI Transparent Asynchronous Tx / Rx Interface: A proprietary high-speed data interface.
TCP / IP Transmission Control Protocol/Internet Protocol: A set of communications protocols that
may be used to connect different types of computers over networks.
TDM Time Division Multiplex: One common, communications channel carrying a number of
signals, each with its own allotted time slot.
TDT Time and Date Table: Part of the DVB Service Information. The TDT gives information
relating to the present time and date.
Temporal Redundancy Information repetition due to areas of little or no movement between successive frames.
Removed using motion estimation and compensation (Inter-Frame Coding).
Time-stamp A term that indicates the time of a specific action such as the arrival of a byte or the
presentation of a presentation unit.
TOT Time Offset Table: This optional SI table supports the use of local offsets as well as the UTC
time/date combination.
The purpose of the table is to list by country the current offset from UTC and the next
expected change to that offset (to track when daylight saving occurs).
The offset resolution is to within 1 minute over a range of
±
12 hours from UTC.