This type of lens has the capability of varying its focal length in order to zoom in on images. An auto iris feature is required in order to achieve this. Variofocal lenses are contrasted with fixed focal lenses, which are less expensive and often allows more light to pass through them at their set length, enabling better detection in low light circumstances.
The number of horizontal lines resolved in a picture is called the vertical resolution, and is determined by the television scanning method, be it NTSC, PAL, or some other format.
A device that activates when it detects vibrations in its detection zone, and then activates a specific surveillance camera is known as a vibration sensor.
This device boosts the strength of a video signal.
The frequency band width utilized to transmit a composite video signal.
This technique (often a MPEG format) compresses video into lower bit rates for easier Internet transmission, often along narrower bandwidths. Video or audio is compressed to shrink file size, ensuring acceptable transfer speed. Compressed video can sometimes be of a noticeably lower quality, but still clear enough to be useful. AVC is the successor to MPEG as the new video compression standard.
Video distribution amplifier
This amplifier is able to boost signal strength and also to create multiple video signal outputs.
Used at door entryways, this system utilizes audio and video for communication or movement control of people.