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time base correctors
correct the minor errors found on tape but some video sources are out of sync with the studio
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a blimp would be
non-synchronous or wild video source because it could not have a cable from the sync generator on the ground
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Frame synchronizers
like time base correctors with a larger memory, converts lines of analog video signal into digital and stabilizes them
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frame synchronizer gate release signal
vertical sync instead of horizontal sync. when it gets a vertical sync pulse from the house sync generator the frame synchronizer feeds out a field of video information. only non-synchronous video sources can be locked up and integrated to system. expensive but do everything TBCs can do plus lock up non-synchronous sound
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HDTV Production
technology and equipment used to record and create programming
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HDTV broadcasting
method of sending programming through air (cable or satellite) to homes
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HDTV's component system
uses 8, 10, or 12 bit processing. 720 or 1080 scanning lines of 1920 pixels each line. 16:9 aspect ratio, 4:2:2 encoding ratio, scanned at 60 fields/30 frames interlace, 50 fields/25 frames interlace, 30 frames p or 24 frames p per second
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HDTV requires
60 MHz. 30 MHz for Y 15 for R-Y and 15 for B-Y
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the biggest change for HDTV is
16:9 aspect ratio from 4:3
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1998 Advanced Television Systems Committee
standards that can be received and displayed on HDTV & SDTV digital TV sets. digital system still uses 6 MHz bandwidth. supports 18 different digital standards, wide screen.
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two different HDTV options for ATSC High Definition broadcast standards
1) 1080p - 1080 scanning lines with 1920 pixels each. 60 fields/30 frames interlace or 30 fields/24 frames progressive 2) 720 p- 720 scanning lines of 1280 pixels per line. 60, 30, or 24 frames of progressive. (p is easier with computers, 24 frames/sec easy with film)
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Standard Definition Digital Television
digitize the standard NTSC video signal and compress it so 4 or more signals can fit into one standard NTSC 6 MHz bandwidth channel. broadcasters can now send out multiple programs on standard TV channel. future-both SDTV & HDTV
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