DVB is an acronym for "Digital Video Broadcasting". DVB was set up by the EBU (European Broadcast Union) to set the standards for digital video transmission. They have published these via ETSI (European Telecommunications Standards Institute) who also set standards for devices such as GSM telephones. In fact there are several DVB standards for different transmission media.Some of these are:
DVB-S Satellite
DVB-C Cable
DVB-T Terrestrial
DVB-SI Specification for Service Information
DVB-CI Common Interface for conditional access