HDMI to HD-SDI Converter - 3G-SDI & SD-SDI too Converts and sends an HDMI signal to a 3G/HD/SDI signal Supports SDI (SMTP 259M), HD-SDI (SMTP 292M), 3G-SDI (SMTP 424M). Supports audio to LPCM 7.1 Channel. Supports a video signal of 480i, 576i, 720p, 1080i and 1080p. It doesn't support HDMI 480p & 576p.