A radio frequency (RF) modulation technique specified by the Advanced Television Systems Committee (ATSC) for use in digital television (DTV), including both high definition television (HDTV) and standard definition television (SDTV). 8-VSB employs 8 levels of amplitude modulation (AM) to achieve a bit rate of 19.28 Mbps over a 6 MHz terrestrial broadcast channel. See also AM, ATSC, bit rate, broadcast, channel, DTV, HDTV, RF, SDTV, and VSB.