The digital spectrum-compatible HDTV system

摘要

The system describes a digital high-definition television (HDTV) system designed for US terrestrial broadcasting but friendly to alternate delivery means. The new system, Digital Spectrum Compatible (DSC-)HDTV, is to be simulcast with NTSC during a multi-year transition period, using all existing television bands. DSC-HDTV uses progressively scanned video at three times the current horizontal line rate, compressed to a data rate that fits in a 6 MHz channel using a mix of two- and four-level symbols.