Broadcast-safe video (broadcast legal or legal signal) is a term used in the broadcast industry to define video and audio compliant with the technical or regulatory broadcast requirements of the target area or region the feed might be broadcasting to. In the United States, the Federal Communications Commission (FCC) is the regulatory authority; in most of Europe, standards are set by the European Broadcasting Union (EBU). Broadcast safe video Broadcast safe standard-definition video Broadcast safe 625 video Broadcast safe standards for 625 lines of standard-definition (Inaccurately referred to as PAL, a colour encoding that is usually used with such systems) video are: Common name = 625/50i (576i) Commonly used digital SD SDI baseband signal = SMPTE 259M-C, 270 Mbit/s bitrate Commonly used No. of Vertical Lines = 625 (576 visible active video) Commonly used Frame rate = 25 Hz (25 interlaced frame/s) Commonly used TV Resolution = 720 x 576 (576i) Black levels = 0 mV or 0 IRE White levels (Chrominance amplitude): 700 mV p-p or 100 IRE - 100% intensity setting which corresponds to 100.0.100.0 SMPTE color bars. 75% intensity corresponding to 100.0.75.0 color bars, also referred to as EBU Bars. Variants Broadcast safe 525 video Broadcast safe standards for 525 lines of standard-definition (System M, NTSC) video are: Common name = 525/60i (480i) Commonly used digital SD SDI baseband signal = SMPTE 259M-C, 270 Mbit/s bitrate Commonly used Frame rate = 30 frame/s black and white, 29.97 interlaced frame/s color Black level = 7.5 IRE for NTSC in the US, 0 IRE in Japan. Blanking level = 0 IRE White levels = 100 IRE, 714 mV Maximum signal level = 120 IRE Minimum signal level = -20 IRE Variants Broadcast safe High Definition video Digital broadcasting is very different from analog. The NTSC and PAL standards describe both transmission of the signal and how the electrical signal is converted into an image. In digital, there is a separation between the subject of how data is to be transmitted from tower to TV, and the subject of what content that data might contain. While data transmission is likely to be a fixed and consistent affair, the content could vary from High Definition video one hour, to SD multicasting the next, and even to non-video datacasting. In the US, 8VSB transmits the data, while MPEG-2 encodes pictures and sound. Broadcast safe audio Broadcast engineers in North America usually line