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PAL (Phase Alternate Line)
PAL is a TV broadcast standard which was developed by the Telefunken Company of
Germany in 1967. The PAL method is a broadcast method with a scanning rate of 25
frames per second. It has fewer frames compared to NTSC but it has a greater number of
straight scanning lines, with 625. It also has better resolution, with its use of high bandwidth.
The advantage of this method is that it is not affected by phase fluctuation. However the
disadvantage is that it cannot be viewed on black & white TVs. Currently Europe, Australia,
China, North Korea and others have adopted this method
USB (Universal Serial Bus)
USB is a kind of serial port for connecting computer peripheral devices. USB has the
function to control several peripheral devices (HDD, CD-ROM drive, keyboard,
printer, etc.) and is an interface supporting Plug & Play technology.
SMTP (Simple Mail Transfer Protocol)
SMTP is a standard protocol used in Internet e-mail transmission.
Frame
A frame is a complete screen view, made by interlacing, in a TV. A field scanned twice
completes a single frame. The NTSC method shows 30 frames per second, in contrast the
PAL method shows 25 frames per second.
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