The TMC2072 Genlocking Video Digitizer samples and quantizes standard analog baseband composite NTSC or PAL video into its 8-bit digital equivalent. It extracts horizontal and vertical sync signals, from which an on-chip PLL generates a line-locked pixel clock for the on-chip 8-bit A/D converter and a double-speed register clock to transfer data to a subsequent video processing subsystem. A second PLL generates a chroma subcarrier locked to the incoming chroma burst. The chip reports each line's color burst phase and frequency during the next horizontal sync pulse.