| The Glossary An all inclusive glossary of security lingo is provided for your convenience. This list will undoubtedly be helpful when delving in to the realm of security. |
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| W: 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. |
Courtesy of CCTV Labs and CCTV focus magazine
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