Edje-2000
Real Time MPEG 2 Streaming Encoder
Version 1.3
Adtec Digital, Inc. USA
Page 45 of 45
PTS -
Presentation Time Stamp. This stamp indicates the time at which an element in the
transport stream must be presented to the viewer. PTSs for audio and video are
transmitted at least every 0.7 seconds. The Pts is found in the PES header.
QAM -
Quadrature Amplitude Modulation. This type of modulation for digital signals used in CATV
transmission (DVB-C). Amplitude and phase of a carrier are modulated in order
to carry information.
QPSK -
Quadrature Phase Shift Keying. A type of modulation for digital signals used in satellite
transmission (DVB-S).
RRT -
Rating Region Table. An ATSC PSIP table that defines ratings systems for different
regions or countries. The table includes parental guidelines based on Content
Advisory descriptors within the transport stream.
RS -
Reed-Solomon Protection Code. This refers to the 16 bytes of error control that can be
added to every transport packet during modulation.
RST -
Running Status Table. A DVB-SI table that indicates a change of scheduling information
for one or more events. It saves broadcasters from having to retransmit the
corresponding EIT. This table is particularly useful if events are running late. It
is located on PID 0x0013.
SDT -
Service Description Table. This DVB SI table describes the characteristics of available
services. It is located on PID 0x0011. Two types of SDTs are specified by DVB,
the SDT Actual and the SDT Other. The SDT Actual is a mandatory table that
describes the services within the transport stream currently being accessed. The
SDT other describes the services contained in other transport streams in they
system.
SDTV -
Standard Definition Television. SDTV refers to television that has a quality equivalent to
NTSC or PAL.
Section -
A syntactic structure used for mapping PSI/SI/PSIP tables into transport packets of 188
bytes.
Service -
A collection of one or more events under the control of a single broadcaster. Also known
as a Program.
SFN -
Single Frequency Network (DVB-T).
SI -
Service Information. This DVB protocol specifies all the data required by the receiver to
demultiplex and decode the programs and services in the transport stream.
Mandatory DVB SI tables include TDT, NIT, SDT and EIT.
SMPTE -
Society of Motion Picture and Television Engineers.
SNG -
Satellite News Gathering. This refers to the retransmission of events using mobile
equipment and satellite transmission.
SNMP -
Simple Network Management Protocol. This is the standard protocol for system and
network administration.
SPI -
Synchronous Parallel Interface. This is a standard DVB interface for a transport stream.
SPTS -
Single Program Transports Stream. An MPEG-2 transport stream that contains one unique
program.
ST -
Stuffing Table. An optional DVB-SI table that authorizes the replacement of complete
tables due to invalidation at a delivery system boundary such as a cable
headend. This table is located on PID 0x0014.
STB -
Set-top box. A digital TV receiver (IRD).
STD -
See System Target Decoder.
STT -
System Time Table. An ATSC PSIP table that carries time information needed for any
application requiring schedule synchronization. It provides the current date and
time of day and is located on PID 0x1FFB.
