The GS9001 implements error detection and handling (EDH) functions according to SMPTE RP165. Interfacing to the parallel port of either the GS9002/GS9022 serial digital encoders or GS9000 decoder, the GS9001 provides EDH insertion and extraction for 4sc NTSC, 4sc PAL and 4:2:2 component standards up to 18 MHz luminance sampling. The GS9001 also generates timing signals such as horizontal sync, vertical blanking, field ID and ancillary data identification. The ancillary data identification aids the extraction of ancillary data from the data stream.