16VSB is an abbreviation for 16-level vestigial sideband modulation, capable of transmitting four bits (24=16) at a time.
Other slower but more rugged forms of VSB include 2VSB, 4VSB, and 8VSB.
16VSB is capable of twice the data capacity of 8VSB; while 8VSB delivers 19.39 Mbit/s (Megabits per second) in a 6-MHz television channel, 16VSB could deliver 38.78 Mbit/s, while making the sacrifice of being more prone to transimission error.
While 8VSB is the ATSC digital broadcast modulation format (used in the United States and a few other countries), 16VSB was planned for cable distribution. 16VSB is about twice as susceptible to noise, therefore less suitable than 8VSB for broadcast, but well suited to the signal-to-noise ratio of hybrid fiber-coax distribution, allowing twice as much programming in a 6-MHz channel.
However, as of 2004, cable companies have 16VSB chosen to extend their existing quadrature amplitude modulation-based systems to carry digital television rather than adopting any form of VSB. This choice by the cable industry is one factor raised to explain the slow take-up of broadcast digital television in the U.S.
Electronics Topics
The field of electronics is the study and use of systems that operate by controlling the flow of electrons or other electrically charged particles in devices such as thermionic valves and semiconductors. The design and construction of electronic circuits to solve practical problems is part of the fields of electronic engineering, and the hardware design side of computer engineering. The study of new semiconductor devices and their technology is sometimes considered as a branch of physics.
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