Normally, when a camera uses infrared LED arrays for wide area illumination at night, you may see the over exposure image when the object is closed to IR camera. Smart IR technology automatically adjusts IR intensity according to proximity, and eliminates object over exposure caused by strong illumination. Smart [...]
Surveillance cameras can be classified as indoor and outdoor models according to installation place. The main difference between two models is whether the camera is weather-proof or not. That is, outdoor camera does completely protect the inner material from weather like wind, rain, moisture, dust, snow, and humidity. Some [...]
DOF (Depth of Field) refers to the range of distance that the subject appears acceptably sharp. DOF is determined by several factors such as aperture size, lens to subject distance, lens focal length, and image sensor size. Generally, the following conditions result in a deep DOF. - small or [...]
ICR (Infrared Cut Filter) is used with color CCD or CMOS image sensors to produce accurate color images. During the day, the camera uses an ICR to reflect or block mid-infrared wavelengths while passing visible lights. However, as light diminishes below a certain level, some cameras can automatically turn [...]
IRE stands for Insitute of Radio Engineers, and represents the composite video signal in percentage terms. That is, 100 IRE equals 100% full signal level which means 714mV amplitude active video signal. Generally, 30 IRE is a minimum value for a detailed and acceptable image. Most cameras represent the [...]
For audio detection, the device (ex. DirectIP camera) calculates the average power of audio signal that is transmitted for specific times (6.5 seconds). If current audio signal’s power is much higher than the power threshold of audio signal (based on the average power of audio signal), then audio detection [...]
Externel IP address means the IP address on the public internet side. Commonly our PC might has the internal IP address range which is assigned from gateway such as NAT(Network address translation). NAT help us to use one public internet IP over many network devices. The reason that you [...]
DDNS is Dynamic DNS(Domain Name System). ISP(Internet Service Provider) is changing periodically a IP address to use limited IP range effectively. To maintain the connectivity with the server anytime, the client has to know the IP address of the server. But it’s not easy to track the IP address [...]
To minimize packet loss, the wiring have to be aligned exactly accoding to the standard. The ordinaly alignment is called 568A and 568B. It was established by TIA(Telecomunications Industry Association)/EIA(Electronic Industries Alliance). Cable alignment 568A and 568B are below. Pin T568A Color T568B Color Pins on patch cord 1 [...]
On several anti-virus programs, IDIS Discovery tool has been detected as a malware and Trojan virus. This is due to one of the files in IDIS Discovery is decreased in size as it runs, and it gives a misunderstanding to some anti-virus software. If you are experiencing such a [...]
