An abbreviation (from Latin brevis, meaning short) is a shortened form of a word or phrase.
In radio communications, single-sideband modulation (SSB) or single-sideband suppressed-carrier modulation (SSB-SC) is a type of modulation, used to transmit information, such as an audio signal, by radio waves.
16VSB is an abbreviation for 16-level vestigial sideband modulation, capable of transmitting four bits (24.
4VSB is an abbreviation for 4-level vestigial sideband modulation, a type of radio transmission capable of transmitting two bits of information (22.
8VSB is the modulation method used for broadcast in the ATSC digital television standard.