Updated 14/11/2012Home » Video Glossary » HDTV


High Definition TV is high-resolution digital television combined with Dolby Digital surround sound (AC3). HDTV is the highest DTV resolution in the new set of standards. This combination creates a stunning image with stunning sound.

HDTV requires new production and transmission equipment at the HDTV stations, as well as new television equipment for reception by the consumer. The higher resolution picture is the main selling point for HDTV. Of the 18 DTV formats, six are HDTV formats, five of which are based on progressive scanning and one on interlaced scanning. Of the remaining formats, eight are SDTV (four wide-screen formats with 16:9 aspect ratios, and four conventional formats with 4:3 aspect ratios), and the remaining four are video graphics array (VGA) formats. Stations are free to choose which formats to broadcast.