CCTV Hardware Compression: Both Capturing Video Signal and Compressing Video Signal are done by DSP chipset integrated on DVR Board. It doesn’t need the computer’s CPU to do this work. It’s a low cost of CPU and RAM resources. In this system the computer CPU’s task focus on answering network request, streaming the video/audio to network and saving recorded data to local hard disk.
CCTV Software Compression: The DVR Board only capture video signal but doesn’t compress it, it is the computer CPU and RAM to do this compression work. It’s a high cost of CPU and RAM resources. In this system, the computer CPU and RAM are often overloaded. It is easier to crash than hardware compression system.