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DVB-Professional Interfaces: TTV Lan search shows – DVB Physical Interfaces Technical Earth: Ensures that all equipment chassis within a rack are at the same potential, usually by connecting a wire between the Technical earth terminal and a suitable point on the rack. This is sometimes known as a Functional earth. Protective Earth: Used for electric shock protection. This is sometimes known as a safety earth. European Broadcast Union. Entitlement Control Message. Ethernet Data Input Electronics Industries Association (USA). Event Information Table: Equipment: A component of the DVB-Service Information (SI) stream generated within an Encoder, containing information about events or programmes such as event name, start time, duration, etc. System: EIT (Present/Following) contains the name of the current and next event. It may include an optional descriptor (synopsis) giving brief details of content. EIT (Schedule) is used to produce a full EPG. The EIT is the only DVB-SI table, which can be encrypted. A generic term for a coded bit-stream, be it video, audio or other. Electromagnetic Compatibility. Entitlement Management Message. Encoding of a transmission to prevent access without the appropriate decryption equipment and authorisation. Electronic Programme Guide: On-screen programme listing using thumbnail pictures and/or text. The most widely used local area network (LAN) defined by the IEEE as the 802.3 standard. Transmission speeds vary according to the configuration. Ethernet uses copper or fibre-optic cables. European Telecommunications Standard. European Telecommunications Standards Institute. Federal Communications Commission. Frequency Division Multiplex: A common communication channel for a number of signals, each with its own allotted frequency. Forward Error Correction: A method of catching errors in a transmission. The data is processed through an algorithm that adds extra bits and sends these with the transmitted data. The extra bits are then used at the receiving end to check the accuracy of the transmission and correct any errors. Fast Fourier Transformation: A fast algorithm for performing a discrete Fourier transform. First In, First Out: A data structure or hardware buffer from which items are taken out in the same order they were put in. Also known as a shelf from the analogy with pushing items onto one end of a shelf so that they fall off the other. A FIFO is useful for buffering a stream of data between a sender and receiver that are not synchronised - i.e. they not sending and receiving at exactly the same rate. The area of the Earth’s surface covered by a satellite’s downlink transmission. Also (generally) the area from which the satellite can receive uplink transmissions. File Transfer Protocol: A protocol used to transfer files over a TCP/IP network (Internet, UNIX, etc.). For example, after developing the HTML pages for a Web site on a local machine, they are typically uploaded to the Web server, using FTP. Unlike e-mail programs in which graphics and program files have to be attached, FTP is designed to handle binary files directly and does not add the overhead of encoding and decoding the data. The ITU-T standard which defines the physical and electrical characteristics of hierarchical digital interfaces. Group of Pictures: MPEG video compression works more effectively by processing a number of video frames as a block. The TANDBERG Television Encoder normally uses a 12 frame GOP; every twelfth frame is an I frame. Graphical User Interface: The use of pictures rather than just words to represent the input and output of a program. A program with a GUI runs under a windowing system and has a screen interface capable of displaying graphics in the form of icons, drop-down menus and a movable pointer. The on-screen information is usually controlled / manipulated by a mouse or keyboard. High Definition Television. High Power Amplifier: Used in the signal path to amplify the modulated and up-converted broadcast signal for feeding to the uplink antenna. Horizontal (line) SYNCs. A device in a multipoint network at which branch nodes interconnect. Page A-4 Instruction Manual: TT1260 Standard Definition Professional Receiver/Decoder ST.TM.E10100.1 Glossary Glossary IEC IF Interframe Coding Intraframe Coding IP I-picture; I-frame IPPV IRD IRE ISDN ISO ISOG ITS ITT ITU-R ITU-T JPEG kbit/s Kbit Ku-band LAN L-band LED LNB Integrated Conditional Access Module: Embedded in the IRD and responsible for descrambling, plus packet filtering and reception. It also contains the physical interface to the subscriber’s viewing card. International Electrotechnical Committee. Intermediate Frequency: Usually refers to the 70 MHz or 140 MHz output of the Modulator in cable, satellite and terrestrial transmission applications. Compression coding involving consecutive frames. When consecutive frames are compared, temporal redundancy is used to remove common elements (information) and arrive at difference informatio...
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