| Annex A |
| Encryption | Encoding of a transmission to prevent access without the |
| appropriate decryption equipment and authorization. |
| EPG | Electronic Programme Guide: |
| thumbnail pictures and/or text. |
| Ethernet | 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 |
| ETS | European Telecommunications Standard. |
| ETSI | European Telecommunications Standards Institute. |
| FBAS | German for CVBS |
| FCC | Federal Communications Commission. |
| FDM | Frequency Division Multiplex: A common communication channel for |
| a number of signals, each with its own allotted frequency. |
| FEC | 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. |
| FFT | Fast Fourier Transformation: A fast algorithm for performing a |
| discrete Fourier transform. |
| FIFO | 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 |
| synchronized - i.e. they not sending and receiving at exactly the |
| same rate. |
FM | Frequency Modulation: Analogue modulation procedure |
| Footprint | 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. |
| FTP | 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 |
| 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. |
| G.703 | The |
| characteristics of hierarchical digital interfaces. |
| GOP | Group of Pictures: MPEG video compression works more effectively |
| by processing a number of video frames as a block. The Ericsson |
| AB Encoder normally uses a 12 frame GOP; every twelfth frame is |
| an I frame. |
EN/LZT 790 0005 R1A |