1080i
1080i is a video resolution of the television standard High Definition Television . "1080" stands for the vertical resolution, "I" for interlace (line jump method) .
resolution
1080i signals are transmitted typically at 50 or 60 fields per second, each with 1920 × 540, by deinterlacing the Full-HD -resolution of 1920 × 1080 with an aspect ratio of 16: 9 yield and 25 or 30 frames per second. In relation to still images, 1080i has a resolution of 2,073,600 pixels five times as high as the PAL format with 414,720 pixels.
The resolution 1440 × 1080 is less common, which despite the aspect ratio of 4: 3 is reproduced as a picture in the aspect ratio 16: 9 using non-square pixels . Well-known stations that use this resolution are, for example, Sport1 HD , Welt HD , RT HD , Nick HD and MTV HD . Anixe HD is broadcast via Astra 1M with a resolution of 1280 × 1080.
The difference to 1080p is the interlacing or transmission in fields. First the even lines (i.e. line 2, 4, 6, 8 etc.) and then the odd lines (i.e. line 1, 3, 5, 7 etc.) are updated. Half of the time, the image is not complete; this is not perceived by the human eye. At 1080p, on the other hand, the full picture is updated directly, i.e. it always consists of full pictures.
distribution
The resolution 1080i50 is mainly used in television. A 1080p 24 signal (with 24 full frames) is only common for movie productions and the Blu-ray discs recorded with them, but has the same data rate. Most of the international HDTV channels and all HD offshoots of the German-speaking private channels broadcast in the 1080i50 format. According to a recommendation by the European Broadcasting Union , however, some of its members (including all German-speaking public broadcasters) broadcast in 720p format .
Support in standards
ATSC and Digital Video Broadcasting (DVB) support 1080i.
See also
Individual evidence
- ↑ 1080i or 1080p: These are the differences. Retrieved June 20, 2019 .