2The Toolbox
2.1 HD Systems and Cameras, By Roland Sterner
Systems
All video systems with a linearity higher than the standard definition (SD) systems NTSC (525 nominal lines, 485 active lines), PAL and SECAM (625 nominal, 576 active) are named high definition, or HD for short. Sony began development of an HD video system in the early 1970s. It had a linearity of 1125 lines and a frame rate of 30 fps. The image was widened to 16:9 to simulate recent wide screen feature films and their compositions and pictorial language. Transmissions were made using this system from the early 1980s. It was a problem making HDVS a world standard, however, since it was a completely analogue system, and it had to be designed in two electronic specifications – for ...
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