Sony's variant of the DV (Digital Video) format. Developed for professional use, DVCAM improves quality by increasing the tape speed and track pitch. The increased track size uses more tape because DV tracks are recorded on the diagonal (see helical scan). In addition, it "locks the audio," which prevents the audio from drifting out of sync with the video. DVCAM uses the same metal evaporated (ME) tape as does DV, and DVCAM cassettes can be played in DVCAM and DVCPRO tape decks. DVCAM VTRs can also play and record DV cassettes. See HDCAM, DV, DVCPRO and SD formats.