Resolution determines the number of pixels within a given video image, which in turn determines the amount of definition possible within the video image.
1080P has a resolution of 1920x1080. 1080P image resolution is two times larger than 960H and double the size of 720P.
BNC is a type of connector used on many CCTV products such as HDCVI cameras and recorders. BNC is also available on some recorders as a monitor output, allowing for a non HD signal to be displayed by a composite television or monitor.