In the NTSC world, a true classification of “D1” entails 720×480 pixels. They are the relevant formats to network video since video encoders provide like-wise resolutions when they digitize signals from the transmissions received from analog cameras. NTSC (National Television System Committee) and PAL (Phase Alternating Line) resolutions are two respected analog video standards. CCTV systems use an analog video signal which derives from television specifications. Vertical and horizontal TVL (television lines)Ī CCTV cameras resolution is measured in vertical and horizontal TVL (television lines) dimensions and often limited by the capabilities of both the camera and the recorder.