The aspect ratios of ordinary cameras are 16:9,5:4 or 4:3 and an example of 16:9 is shown below, from which we can see the walls occupy a large area, while generally the walls have nothing worthy to be monitored. The corridor part that is the really valuable area takes only about 25% of the total picture, which is a...

With the popularity of international standard video codec algorithms and the constant updates of video and audio processing technologies, video editing applications have become rather mature, which promote the reverse encoding and video tampering threats. Therefore, the integrity of video data and the security of da...

A video file is comprised of continuous images. Each image is called a frame. If a one-second video file is composed of 25 continuous images, the frame rate is 25 fps. With the phase alternating line (PAL) standard, a frame rate of 25 fps provides vivid display. If the frame rate is lower than 25 fps, motions in a v...

Power over Ethernet technology is no longer new, it has been widely used in many network applications, including the popular network video surveillance system. Utilizing PoE technology is quite simple, you just need to choose the right switch which complies IEEE standard for PoE.