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The standard NTSC video image contains some lines (lines 1–21 of each field) that are not visible (this is known as the Vertical Blanking Interval, or VBI); all are beyond the edge of the viewable image, but only lines 1–9 are used for the vertical-sync and equalizing pulses. The remaining lines were deliberately blanked in the original ...
The eight regions each correspond to a value which is a power of 2: Region 1 corresponds to 1 (2 0), Region 2 to 2 (2 1), Region 3 to 4 (2 2), and so on through Region 8, which corresponds to 128 (2 7). The values of each region that the disc is not encoded for are added together to give the value in the file. For example, a disc that is ...
This is the standard broadcast frame rate for countries with an NTSC history—mainly the US, Canada, Japan and South Korea. This was the standard format of American TVs due to the displaying of CRT screens which were common place before the wide spread use of digital monitors. Alternating currents are used to time each scan, by which two scans ...
Perhaps the most technically challenging conversion to make is the PAL and SÉCAM to NTSC conversion. PAL and SÉCAM use 625 lines at 50 fields/s or 25 frames/s; NTSC uses 525 lines at 59.94 fields/s (60000/1001) or 30 frames/s; The NTSC standard is temporally and spatially incompatible with both PAL and SÉCAM.
NTSC-J or "System J" is the informal designation for the analogue television standard used in Japan. The system is based on the US NTSC standard with minor differences. [1] While NTSC-M is an official CCIR [2] [3] [4] and FCC [5] [6] [7] standard, NTSC-J or "System J" are a colloquial indicators.
Analog TV systems global map, with System M in red. CCIR System M, [1] [2] [3] sometimes called 525–line, NTSC, NTSC-M, or CCIR-M, [4] [5] is the analog broadcast television system approved by the FCC (upon recommendation by the National Television System Committee - NTSC) [6] for use in the United States since July 1, 1941, [7] [8] replacing the 441-line TV system introduced in 1938. [8]
1940: The American Federal Communications Commission, (), holds public hearings about television; 1941: First television advertisements aired. The first official, paid television advertisement was broadcast in the United States on July 1, 1941, over New York station WNBT (now WNBC) before a baseball game between the Brooklyn Dodgers and the Philadelphia Phillies.
Analog broadcasting systems—PAL/SECAM and NTSC—were historically limited in the set of moving image formats they could transmit and present. PAL/SECAM can transmit 25 Hz and 50 Hz material, and NTSC can only transmit 30 Hz and 60 Hz material (later replaced by 30/1.001 and 60/1.001 Hz).