We are glad to write the addition of a new frequency asked question article, this time giving a little clarity to what difference between TVL and megapixel, how TVL measurements compare to pixel meassurements in PAL, NTSC and IP CCTV systems. For conventional video surveillance cameras, they are analog cameras which output analog TV signals. Accordingly, TV line is used to refer the image resolution that the camera can capture. The resolution of image mainly depend on equipped CCD/CMOS image sensor. Based on different CCD/CMOS image sensor, analog camera can deliver standard resolution video with 700TVL, 650TVL, 480TVL, 420TVL etc. [...]

It's undeniable that power supply is crucial important to your video security cameras. For ensuring the stability and reliability of your video surveillance system, installers and users should choose high quality power supply. Poor quality power supply can lead to image distortion, flickering, even damage of security camera hardware. Typically, outdoor security cameras utilize 12V DC power supply, and PTZ cameras use 24V AC power supply, some security cameras may use 220V AC power, 5V DC power supply is widely used in indoor security cameras. Power adapters or distribution boxes? All security cameras require some sort of power source. Power [...]

No matter you want to use an IP camera system or a HD camera system, you have to use HDDs for video storage, here comes the question - how many HDDs should the system use? what the capacity size of the HDD should be used? Installers or end-users need to estimate the required storage size according to the time length that the system should keep the video footage. Additionally, sometimes the cost of one piece HDD is equivalent to the entire cost of camera system, hence we don’t want to waste money on HDDs. 1# How to calculate the storage size? To estimate [...]

Cos’è la videosorveglianza: La videosorveglianza è uno dei settori in sviluppo che si occupa di vigilare a distanza un luogo o un bene, attraverso l’uso di telecamere. Inizialmente la videosorveglianza era di tipo analogico ,o ibrido, e nasce da un ingegnere tedesco nel 1942, ma si usa solamente per scopi militari. Successivamente, negli anni ’70, si espanse a livello sociale, per poi arrivare all’utilizzo di videocamere digitali. Componenti di una telecamera: La videocamera è costituita da tre elementi fondamentali: la lente, il sensore, processore o elaboratore d'immagine, e il registratore. L’immagine passa dalla lente e viene catturata dal sensore, che [...]