4VSB
Encyclopedia
4VSB is an abbreviation
Abbreviation
An abbreviation is a shortened form of a word or phrase. Usually, but not always, it consists of a letter or group of letters taken from the word or phrase...

 for 4-level vestigial sideband modulation, capable of transmitting two bits (22=4) at a time. Other faster but less rugged forms include 8VSB
8VSB
8VSB is the modulation method used for broadcast in the ATSC digital television standard. ATSC and 8VSB modulation is used primarily in North America; in contrast, the DVB-T standard uses COFDM....

 and 16VSB
16VSB
16VSB is an abbreviation for 16-level vestigial sideband modulation, capable of transmitting four bits at a time.-How it works:Other slower but more rugged forms of VSB include 2VSB, 4VSB, and 8VSB...

. While 2VSB
2VSB
In telecommunications, 2VSB is an abbreviation for 2-level vestigial sideband modulation, a transmission method capable of transmitting one bit at a time.Other faster but less rugged forms include 4VSB, 8VSB, and 16VSB....

is more rugged, it is also slower.
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