Record and playback systems for 1.2 Gb/s HDTV digital VTR

Some of the essential technology of the record/playback system of a 1.2 Gb/s digital VTR are described. The VTR can record the full bandwidth of 1125/60 HDTV signals, namely, 30 MHz for luminance, and 15 MHz for each of the two color difference signals. Integrated detection and a 5-tap transversal filter appropriate to the developed head-tape systems with a cross-shaped multilayered amorphous head and metal particle tape, and a special PLL to cope with stunt motion are studied. At a high data rate of 148.5 Mb/s and a high linear density of 0.345 mu m per bit, the recorder confirms reliable operation with a word error rate of less than 10/sup -4/.