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T U V
WAN. Wide Area
An oscilloscope used to display the video waveform, usually having
a line counter built in to trigger
and display only one line of a video image.
Wavelet. A particular
type of video compression that is especially suitable for CCTV.
higher compression ratio with equal
or better quality to JPEG.
White balance. An
electronic process used in video cameras to retain true colours.
performed electronically and is
set on the basis of a white object in the picture.
White level. This
part of the video signal electronically represents the white part of an
is a voltage of 1V peak to peak (assuming a sync of 0.3V) or 100 IRE
black level is
0.3V peak to peak or 0 IRE.
Wow and flutter. Wow
refers to low frequency variations in pitch while flutter refers to
higher-frequency variations in
pitch caused by variations in the tape-to-head speed
W-VHS. A new Wide-VHS
standard proposed by JVC, featuring a high resolution format
aspect ratio of 16:9.