Adtec digital mediaHUB-HD 422 (version 1.01.10_M_2) Manual - Manual (Page 96)

DVB ASI Asynchronous Serial Interface. This is a standard DVB interface for a transport stream
DVB-C
Digital Video Broadcasting-Cable. The DVB standard for broadcasting digital TV signals by cable. The RF
spectrum in digital cable TV networks has a frequency range of (approx) 46MHz to 850MHz
DVB-S
Digital Video Broadcasting-Satellite. The DVB standard for broadcasting digital TV signals via satellite DVB
SPI - Synchronous Parallel Interface. This is a standard DVB interface for a transort stream. DVB-T - Digital
Video Broadcasting-Terrestrial. The DVB standard for broadcasting digital terrestrial TV signals ECM -
Entitlement Control Message. ECMs carry private conditional access information that allows receivers to
decode encrypted information
EIT (ATSC)
Event Information Table. This table is part of the ATSC PSIP. It carries the TV guide information including
titles and start times for events on all the virtual channels within the transport stream. ATSC requires that
each system contain at least 4 EIT table, each representing a different 3-hour time block. The PIDs for these
tables are identified in the MGT
EIT Actual
(DVB)
Event Information Table. This table is part of the DVB SI. It supplies the list of events corresponding to each
service and identifies the characteristics of each of these events. Four types of EITs are defined by DVB : 1)
The EIT Actual Present/Following supplies information for the present event and the next or following event
of the transport stream currently being accessed. This table is mandatory and can be found on PID=0x0012.
2) The EIT Other Present/Following defines the present event and the next or following events of other
transport streams in the system that are not currently being accessed by the viewer. This table is optional.
3)The EIT Actual Event Schedule supplies the detailed list of events in the form of a schedule that goes
beyond what is currently or next available. This table supplies a schedule of events for the transport stream
currently being accessed by the viewer. 4) The EIT Other Event Schedule supplies the detailed schedule of
events that goes beyond what is currently or next available. This table supplies a schedule of events for
other transport streams in the system that are not currently being accessed by the viewer. The EIT Schedule
tables are optional
EMM
Entitlement Management Message.EMMs specify authorization levels or services of specific decoders. They
are used to update the subscription options or pay-per-view rights for an individual subscriber or for a group
of subscribers
EPG
Electronic Program Guide. This guide represents a broadcasting data structure that describes all programs
and events available to the viewer. It functions like an interactive TV guide that allows users to view a
schedule of available programming and select what they want to watch.
Elementary
Stream A bit stream that includes video, audio or data. It represents the preliminary stage of the Packetized
Elementary Stream (PES)
ETR ETR - ETSI Technical Report
ETR 290 ETR 290 - ETSI recommendation regarding measurement of MPEG-2 DVB transport streams
ETSI ETSI - European Telecommunication Standard Institute
ETT
ETT - Extended Text Table. This table is part of the ATSC PSIP. It carries relatively long text messages for
additional descriptions of events and channels. There are two types of ETTs, the Channel ETT, which
describes a channel, and the Event ETT, which describes individual events in a channel. The PID for this
table is identified in the MGT
Event
A collection of elementary strean\ms with a common time base and an associated start time and end time.
An event is equivalent to the common industry usage of “television program”
Frame Lines of spatial information for a video signal
FEC
Forward Error Correction. This method adds error control bits before RF modulation. With these bits, errors
in the transport stream may be detected and corrected prior to decoding
Group of
Pictures
(GOP)
a set of pictures usually 12-15 frames long used for temporal encoding of MPEG-2 video.
HDTV - High Definition Television. HDTV’s resolution is approximately twice as high as that of Standard
Definition Television (SDTV) for both horizontal and vertical dimensions. HDTV has an aspect ratio of 16x9
as compared to the 4x3 aspect ratio of SDTV
IEC International Electrotechnical Commission.
IEEE Institute of Electrical and Electronics Engineers.
I/F Interface
I-frame
Intra-coded frame, or a picture encoded without reference to any other picture. I-frames provide a reference
for Predicted and Bidirectionally predicted frames in a compressed video stream.
www.adtecdigital.com