4VSB is an abbreviation for 4-level vestigial sideband modulation, a type of radio transmission capable of transmitting two bits of information (2=4) at a time. Other faster but less rugged forms include 8VSB and 16VSB. While 2VSB is more rugged, it is also slower.
References
- M. Sablatash (1994). "Error-Control Coding, Modulation, and Equalization for All-Digital Advanced Television: State of the Art and Future Possibilities". In L. Stenger; L. Chiariglione; M. Akgun (eds.). Signal processing of HDTV, V. International Workshop on HDTV '93, Ottawa, Canada, October 26-28, 1993. Amsterdam: Elsevier. p. 307. ISBN 978-1-4832-9851-1. OCLC 896825877.
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