Similarly CC3 and CC4 share the second even field of line 21.
2.
Television sets then recombine the two fields of lines to display a complete picture.
3.
EIA-608 captions are transmitted on either the odd or even fields of line 21 with an odd parity bit in the non-visible active video data area in NTSC broadcasts, and are also sometimes present in the picture user data in transmissions.
4.
Not far behind the pins is a barrier ( called " paraboloa " ) to stop the ball but behind the barrier the actually target area lies, the " marren zelaia " " field of lines " ( " campo de rayas " in Spanish ), 20m wide and 40m long.
5.
However, in any situation where standard-definition video cameras are used, the quality is going to be poor because the maximum pixel resolution of the image chips in most of these devices is 320, 000 pixels ( analogue quality is measured in TV lines but the results are the same ); they generally capture horizontal and vertical fields of lines and blend them together to make a single frame; the maximum frame rate is normally 30 frames per second.
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