Date → Monday, 23 April 2018
HD Channels ,list of HD channels
HDTV, HD - High-Definition Television - TV standard, which provides a better picture quality compared to existing analog and digital TV standards. HDTV transmission in the coded signal is packed (compressed) digital. Compressing video for a specific formulas and laws of the compression standard is much reduced bandwidth transmission (with a 1.485 Gb / s to 8-25 Mbit / s), and the image quality decreases slightly, but for the audience it is not noticeable.
Encoding and video transmission systems, satellite and cable TV set format MPEG-2 and MPEG-4/AVC, with channel width (15-25 Mbit / s MPEG-2 or 8-12 Mbit / s MPEG-4 - depending on the degree of compression).
most popular and standards applied broadcast HD:
1080i: 1920x1080 , the letter i in the designation of the standard - interlaced, 16:9 aspect ratio, frequency - 25 or 30 frames / sec.
1080p: 1920x1080 , the letter p in the designation of the standard - Progressive Scan, 16:9, frequency - 24, 25 or 30 frames / sec.
720p: 1280x720 , progressive (progressive) scan, 16:9, frequency - 50 or 60 frames / sec
See also :