A laser disc is a plastic disk or platter on which text, video and graphic images can be encoded by means of microscopic pits engraved into the disk; also known as videodiscs. Laserdiscs are read by special players that transmit a laser beam onto the disks. Laserdiscs are read by special players that transmit a laser beam onto the disks. laserdisc was used primarily in movies before the introduction of VCDs and the most popular DVDs. The laserdisc (LD) was the first commercial optical disc storage medium, and was used primarily for the presentation of movies. LD had a number of advantages over VHS. It featured a far sharper picture with a horizontal resolution of 400 lines for NTSC and 440 lines for PAL discs, while VHS only offered 250 lines. It could handle analog and digital audio where VHS was analog only, and the NTSC discs could store multiple audio tracks.