HDV@Work

Published Thursday, February 13, 1997

Just What is 1080i? Part 2 In the last HDV@Work newsletter we learned that “1080i” can have horizontal pixel counts that range from 960 to 1920 — a whopping 2:1 range. However, the one constant was that there were always 1080 pixels vertically. Alas, both vertical resolution and horizontal resolution are not as high as these numbers suggest. To convert the number of horizontal pixels to “horizontal lines of resolution” we must consider the Kell Factor. The Kell Factor was first measured by Ray Kell in 1934, who was working with an all electronic, 240-line, progressive ...

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