Scanning Lines
Scanning Lines – a) A single, continuous narrow strip of the picture area containing highlights, shadows and half-tones, determined by the process of scanning. b) Horizontal or near-horizontal lines sampling a television image in the vertical direction. In tube-type cameras and displays equipped with CRTs, the scanning lines are caused by electron beam traces. Scanning Lines Per Frame 525 – NTSC 625 – Most non-NTSC broadcast systems 655 – Used for electronic cinematography with 24 frames per second 675 – EIA industrial standard 729 – EIA industrial standard 750 – RCA and International Thomson progressive scanning proposal 819 – CCIR System E (used in France) 875 – EIA industrial standard 900 – International Thomson progressive scanning proposal 945 – EIA industrial standard 1001 – French progressive scanning proposal for NTSC countries 1023 – EIA industrial standard 1029 – EIA industrial standard 1049 – Double NTSC with interlaced scanning 1050 – Double NTSC with progressive scanning, French interlace proposal 1125 – ATSC/SMPTE HDEP standard 1200 – French progressive scanning proposal for non-NTSC countries 1225 – EIA industrial standard 1249 – Double non-NTSC with interlaced scanning 1250 – Double non-NTSC with progressive scanning 1501 – Early BBC proposal 2125 – Early NHK monochrome system 2625 – RCA electronic cinematography proposal
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