ATSC digital television system

摘要: This disclosure describes a flexible digital transmission system that improves upon the ATSC A/53 HDTV signal standard. The includes television transmitter for generating first Advanced Television Systems Committee (ATSC) standard 8-VSB bit stream and, an encoded new capable of transmitting high priority information bits, wherein symbols are being transmitted according to mode selected from group comprising: 2-VSB mode, 4-VSB and hierarchical-VSB (H-VSB) mode. Each respective 2-VSB, 4-VSB, H-VSB is characterized as having mapped possible symbol values alphabet comprising respectively, {−7, −5, 5, 7}, {7, 3, −3, −7}, −7}. may be simultaneously over terrestrial channel broadcaster defined bit-rate ratio.