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Re: What's the minimum resolution for Broadcast quality?

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Re: What's the minimum resolution for Broadcast quality?
on Apr 11, 2004 at 8:44:57 pm

>The 530 lines of resolution you reference are the number of TV lines from top to bottom on your screen.<

The 530TVlpi refered to in camcorder specs is Horiz. resolution, vert. resolution is much less due to the binning of two lines of sensors in each field interlaced video. Also the the 530TVlpi refered is the bandwidth the the recording section of the camcorder is capable of not, the overall resolution of the camcorder, you could be putting 400TVlpi signal on a 530TVlpi capable recorder, because of the lens quality, CCD resolution, signal processing, etc.
Actual Broadcast resolution is about 330TVlpi due to the bandwidth limitations of modulation of the transmitted signal.
Broadcast video needed high resolution camcorders in the past when it was analog due to generation loses in subsuquent stages of video processing, digital video is basically lossless between the camcorder and antenna except for some changes made during editing and conversion for transmission.
The original Broadcast standards were setup with analog in mind, a signal at a certain place in the broadcast chain had to match certain criteria because of the inherent losses of analog.
Broadcast Quality nowadays has more to do with content than quality, if you have a poorly lit vhs camcorder video of an ax murder in action you're probably have air time after they edited out any cleavage showing.

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