Archive

Archive for the ‘Glossary’ Category

DVB

Digital Video Broadcasting (DVB) is a suite of internationally accepted open standards for digital television. DVB standards are maintained by the DVB Project, an international industry consortium with more than 270 members, and they are published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC) and European Broadcasting Union (EBU).



Frequency

The number of complete cycles a signal executes in a unit of time. Usually measured in Hertz (cycles per second).



4G

4th Generation Mobile Network. 4G will be available in 2012 – 2015. There is no formal definition for what 4G is; however, 4G will be a fully IP-based integrated system. 4G will be capable of providing between 100 Mbit/s and 1 Gbit/s speeds both indoors and outdoors, with premium quality and high security.



GmbH

Gesellschaft mit beschrankter Haftung



GIS

Geographical Information System



2G

2nd Generation Mobile Network. 2G network uses digital signal to transmit voice. Compared with analog signal, digital signal is more accurate, reliable, and scalable. The 2G network can carry text messages (SMS, Short Messaging Service) along with voice. In addition, a 2G mobile phone often integrates a data modem. It can connect to the internet by making modem calls to certain dial-up service numbers provided by the carrier. A 2G mobile phone can also browse the internet.



1G

1st Generation Mobile Network. 1G network is only capable of transmitting voice via analog signals. The handsets are big, heavy, and expensive. Those 1G mobile phones are “dumb” voice-only terminals. 1G networks and mobile phones have been phrased out in most parts of the world.



3G

3rd Generation Mobile Network. 3G network provides very fast data access to the phones. You can stream audio/video contents on a 3G mobile phone.



GLONASS

Russian Global Orbiting Navigation Satellite System



GNSS

Global Navigation Satellite System