Technical Terms

Explaining H.264 can be a bit technical. To put it in a simple way, H.264 is an industry standard for video compression, the process of converting digital video into a format that takes up less capacity when it is stored or transmitted. Video compression or video coding is an essential technology for applications such as Continue Reading

Frame rate, FPS of CCTV Camera package (also known as frame frequency) is the frequency (rate) at which an imaging device produces unique consecutive images called frames. The term applies equally well to computer graphics, video cameras, film cameras, and motion capture systems. Frame rate is most often expressed in frames per second (FPS), and Continue Reading

CIF, which stands for Common Intermediate Format, also known as FCIF (Full Common Intermediate Format), is a format used to standardize the horizontal and vertical resolutions in pixels of YCbCr sequences in video signals. Usually, in home and business CCTV camera world, terms also used are CIF, 2CIF (2x CIF), and 4CIF (4× CIF). The Continue Reading

Door Access Accessories Package Includes: 1. Power Supply and Backup Battery – To provide stable direct current and stable current to support access controls and electromagnet locking hardware. A rechargeable lead-acid battery is included to retain security for short-term power outages 2. Electromagnetic Lock (EM Lock) – A locking device that consists of an electromagnet Continue Reading

At SafeTrolley.com, all the video footage is stored in your CCTV-DVR harddisk. You can always review the footage video anytime, anywhere you want. (Read Personalized Website for Realtime Viewing of CCTV Cameras to know how to remotely view the video) The size of harddisk we provide ranges from 500GB to 2TB, which allows you to Continue Reading

All our CCTV cameras package comes with the smartphone viewing function. You can use your iPhone, Android or Window Mobile operated smartphone to view the real time video. At SafeTrolley.com, no additional software is required to view the video. (it’s good, right? Cause you definitely don’t want to get your smartphone crashed because you install Continue Reading

At Safetrolley.com, we always try to provide the best and most value-added service for our clients. That is why we specially come out with our own and top-level domain name http://www.safetrolley-cctv.com, for your use, whenever and wherever you want to login and view what is happening in your monitored area. The domain name is easy Continue Reading

At SafeTrolley.com, you can set our CCTV camera package in two recording mode: – You can record the video footage consistently – You can also record the footage only when there is a movement/motion in front of the camera, which is called Motion Detection Although the first mode is used by most of the customers, Continue Reading

TV Line, or Television line (TVL), is a specification of an analog camera’s or monitor’s horizontal resolution power. It is alternatively known as Lines of Horizontal Resolution (LoHR), aka lines of resolution. The TVL is one of the most important resolution measures in a video system. To put it to a simple explanation, the more Continue Reading

Terms “varifocal” and “Auto Iris” refer to CCTV Camera lens functions. A varifocal lens is a camera lens with variable focal length in which focus changes as focal length (and magnification) changes, as compared to parfocal (“true”) zoom lens, which remains in focus as the lens zooms (focal length and magnification change). Many so-called “zoom” Continue Reading