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Thursday, 12 December 2013

Hd Video Wallpaper

Hd Video Wallpaper Biography

Source (google.com.pk)

High-definition video is video of higher resolution than is standard. While there is no specific meaning for high-definition, generally any video image with more than 480 horizontal lines (North America) or 576 lines (Europe) is considered high-definition. 720 scan lines is generally the minimum even though many systems greatly exceed that. Images of standard resolution captured at rates faster than normal (60 frames/second North America, 50 fps Europe), by a high-speed camera may be considered high-definition in some contexts.

The first electronic scanning format, 405 lines, was the first "high definition" television system, since the mechanical systems it replaced had far fewer. From 1939, Europe and the US tried 605 and 441 lines until, in 1941, the FCC mandated 525 for the US. In wartime France, René Barthélemy tested higher resolutions, up to 1,042. In late 1949, official French transmissions finally began with 819. In 1984, however, this standard was abandoned for 625-line color on the TF1 network.

Common high-definition video modes

Video mode - Frame size in pixels (W×H) - Pixels per image1 - Scanning type - Frame rate (Hz)

720p 1,280×720 921,600 - Progressive - (23.976, 24, 25, 29.97, 30, 50, 59.94, 60, 72)

1080i 1,920×1,080 2,073,600 - Interlaced - {25 (50 fields/s), 29.97 (59.94 fields/s), 30 (60 fields/s)

1080p 1,920×1,080 2,073,600 - Progressive - (24 (23.976), 25, 30 (29.97), 50, 60 (59.94)

Ultra high-definition video modes

Video mode Frame size in pixels (W×H) Pixels per image1 Scanning type Frame rate (Hz)

2000p 2,048×1,536 3,145,728 Progressive 24

2160p 3,840×2,160 8,294,400 Progressive 60, 120

2540p 4,520×2,540 11,480,800 Progressive

4000p 4,096×3,072 12,582,912 Progressive

4320p 7,680×4,320 33,177,600 Progressive 60, 120