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Question: What is progressive scan?
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| Answer: Progressive scanning is the ability to generate a picture in one pass (as with a computer monitor). Conventional interlaced scanning requires two passes to generate a picture, the first pass for the odd-numbered scan lines, the second for the even-numbered scan lines. Conventional analog TV, as we know it, is interlaced scanning with a (complete picture) refresh rate of 30 times per second, while progressive scanning is twice that at 60 times per second.
The HDTV format is a prime example of progressive scanning. |
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