Nokia 3G 0800 015 0286 User Manual

Contents

Nokia 3G 0800 015 0286 User Manual Manual pdf 11 page image

CIFCommon Intermediate Format. CIF is a video image format using 352horizontal pixels and 288 vertical lines. The format is adopted in multimediacommunication standards.CIRCUIT SWITCHED SERVICEThis is a data transfer communication service which (as in the case of standardtelephone service) applies circuitswitching for each call to establish a circuitwith the other party and then disconnect that circuit upon call completion.However, circuit-switched services are losing their relevance with thedevelopment of packet-switching as typified by communication over theInternet.CODECCODEC is an amalgam of the terms “Coder” and “Decoder” It generallysignifies the encoding device/module which carries out highly efficientconversion processing from the basic digital signal to a compressed signalduring digitalisation of voice and picture signals. Encoding specifications forthe voice CODEC and image CODEC are stipulated by the G-series and H-series IJU-T recommendations, respectively. In the case of mobilecommunication, encoding specifications are established by the concernedstandardising bodies.CUTTING EDGEEnhanced Data Rates for GMS Evolution, also referred to as GSM384 or UWC-136. EDGE is an evolution of GSM and US-TDMA systems. It provides datarates up to 384 kbit/s.DIGITAL SIGNATUREAn electronic signature. A technology used to guarantee the reliability ofinformation during electronic transactions. Digital signaturing is enabledthrough the application of open key encryption technology, and compriseselectronic data verifying the identity of the user. A digital signature is createdby coding data using an encryption key. Since only the user him/herself is inpossession of the corresponding encryption key, the digital signature isessentially unforgettable. The digital signature is subsequently attached todata transmitted to another party to guarantee that the individual sending themessage really is who he or she claims to be.C-D11