Cascadia Digital video recorder Manual do Utilizador descarregar pdf (Página 40)

CCTV Glossary

Cascadia Video Products LLC

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WAN. - Wide area network.

Waveform monitor. - Oscilloscope used to display the video waveform.

Wavelet. - A particular type of video compression that is especially suitable for CCTV. Offers higher

compression ratio with equal or better quality to JPEG.

White balance. - An electronic process used in video cameras to retain true colors. It is performed

electronically 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 image. It

resides at 0.7 V from the blanking level, whereas the black part is taken as 0 V.

Wow and flutter. - Wow refers to low frequency variations in pitch while flutter refers to high-

frequency variations in pitch caused by variations in the tape-to-head speed of a tape machine.

W-VHS. - A new wide-VHS standard proposed by JVC, featuring a high resolution format and an

aspect ratio of 16:9.

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Cascadia Digital video recorder Manual do Utilizador Página 40