Images resolution that are 1080x720 are considered HD (high definition). In the video surveillance world there is analog high definition and digital high definition. Analog are usually older cameras that use coaxial cable and Digital cameras are IP or network based. 960H DVRs and cameras are at a resolution of 960x480 and technically do not belong the high definition category but often marketed as HD. True HD cameras start at 2MP and up. Do not be mistaken IP high definition camera provide resolution and image quality when compared to analog HD cameras.