8VSB

8-VSB8-Bit Vestigal SidebandATSCdigital TV
8VSB is the modulation method used for broadcast in the ATSC digital television standard.wikipedia
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ATSC standards

ATSCdigitalATSC standard
8VSB is the modulation method used for broadcast in the ATSC digital television standard.
Key among these is the 8VSB modulation system used for over-the-air broadcasts.

Modulation

modulatedmodulatordigital modulation
8VSB is the modulation method used for broadcast in the ATSC digital television standard.

Single-sideband modulation

SSBsingle sidebandsingle-sideband
8VSB is an 8-level vestigial sideband modulation.
It may also be used in digital transmission, such as the ATSC standardized 8VSB.

16VSB

16-VSB
There are also similar modulations 2VSB, 4VSB, and 16VSB.
Other slower but more rugged forms of VSB include 2VSB, 4VSB, and 8VSB.

Pulse-amplitude modulation

PAMPAM-5pulse amplitude modulated
Vestigial sideband modulation (VSB) is a modulation method which attempts to eliminate the spectral redundancy of pulse-amplitude modulation (PAM) signals.
This system, known as 8VSB, is based on an eight-level PAM.

Digital television

digitaldigital TVDTV
Early 8VSB DTV (digital television) receivers often had difficulty receiving a signal in urban environments.

4VSB

There are also similar modulations 2VSB, 4VSB, and 16VSB.
Other faster but less rugged forms include 8VSB and 16VSB.

2VSB

There are also similar modulations 2VSB, 4VSB, and 16VSB.
Other faster but less rugged forms include 4VSB, 8VSB, and 16VSB.

Digital cable

digitaldigital cable televisioncable
16VSB was notably intended to be used for ATSC digital cable, but quadrature amplitude modulation (QAM) has become the de facto industry standard instead as it is cheap and readily available.
Some MATV systems may carry 8-VSB and QAM signals, mostly in apartment buildings and similar facilities that use a combination of terrestrial antennas and cable distribution sources (such as HITS or "Headend in the Sky", a unit of Comcast that delivers digital channels by satellite to small cable systems).

Orthogonal frequency-division multiplexing

OFDMCOFDMOFDM system comparison table
ATSC and 8VSB modulation is used primarily in North America; in contrast, the DVB-T standard uses COFDM.
The question of the relative technical merits of COFDM versus 8VSB for terrestrial digital television has been a subject of some controversy, especially between European and North American technologists and regulators.

MPH (ATSC)

MPHMobile Pedestrian HandheldMobile-Pedestrian-Handheld (MPH)
Several "enhanced" VSB systems were in development, most notably E-VSB, A-VSB, and MPH.

North America

NorthNorth AmericanNA
ATSC and 8VSB modulation is used primarily in North America; in contrast, the DVB-T standard uses COFDM.

Quadrature amplitude modulation

QAM64-QAM64QAM
16VSB was notably intended to be used for ATSC digital cable, but quadrature amplitude modulation (QAM) has become the de facto industry standard instead as it is cheap and readily available. ATSC and DVB-T specify the modulation used for over-the-air digital television; by comparison, QAM is the modulation method used for cable.

Cable television

cablecable TVcable channel
ATSC and DVB-T specify the modulation used for over-the-air digital television; by comparison, QAM is the modulation method used for cable.

Binary number

binarybinary numeral systembase 2
In essence, it converts a binary stream into an octal representation by amplitude-shift keying a sinusoidal carrier to one of eight levels.

Octal

8base 8Oct
In essence, it converts a binary stream into an octal representation by amplitude-shift keying a sinusoidal carrier to one of eight levels.

Amplitude-shift keying

ASKamplitudeamplitude shift keying
In essence, it converts a binary stream into an octal representation by amplitude-shift keying a sinusoidal carrier to one of eight levels.

Sine wave

sinusoidalsinusoidsine
In essence, it converts a binary stream into an octal representation by amplitude-shift keying a sinusoidal carrier to one of eight levels.

Symbol rate

symbolbaud rateSR
8VSB is capable of transmitting three bits (2 3 =8) per symbol; in ATSC, each symbol includes two bits from the MPEG transport stream which are trellis modulated to produce a three-bit figure.

MPEG transport stream

TStransport streamMPEG-TS
8VSB is capable of transmitting three bits (2 3 =8) per symbol; in ATSC, each symbol includes two bits from the MPEG transport stream which are trellis modulated to produce a three-bit figure.

Trellis modulation

trellis coded modulationTCMTrellis
8VSB is capable of transmitting three bits (2 3 =8) per symbol; in ATSC, each symbol includes two bits from the MPEG transport stream which are trellis modulated to produce a three-bit figure.

Nyquist filter

The resulting signal is then band-pass filtered with a Nyquist filter to remove redundancies in the side lobes, and then shifted up to the broadcast frequency.

Hertz

MHzkHzHz
In the 6 MHz (megahertz) channel used for broadcast ATSC, 8VSB carries a symbol rate of 10.76 megabaud, a gross bit rate of 32 Mbit/s, and a net bit rate of 19.39 Mbit/s of usable data.

Baud

megabaudkilobaudBaud rate
In the 6 MHz (megahertz) channel used for broadcast ATSC, 8VSB carries a symbol rate of 10.76 megabaud, a gross bit rate of 32 Mbit/s, and a net bit rate of 19.39 Mbit/s of usable data.

Bit rate

bitratedata ratedata transfer rate
In the 6 MHz (megahertz) channel used for broadcast ATSC, 8VSB carries a symbol rate of 10.76 megabaud, a gross bit rate of 32 Mbit/s, and a net bit rate of 19.39 Mbit/s of usable data.