ULEAD VIDEOSTUDIO USER GUIDE 149HD DVD (High Density Digital Versatile Disc) Developed as a standard forhigh-definition DVD, HD DVD is similar to the Blu-ray Disc, which also uses a 120mm diameter optical data storage media and 405 nm wavelength blue laser.Digital Versatile Disc (DVD) is popular in video production because of itsquality. Not only does it guarantee superb audio and video quality, it can also holdseveral times more data than VCDs and SVCDs. DVDs make use of the MPEG-2format, which has a much bigger file size than MPEG-1, and can likewise beproduced as single or dual-sided, and single and dual-layered. They can be playedon stand-alone DVD players or on the DVD-ROM drive of your PC.Video Compact Disc (VCD) is a special version of a CD-ROM that uses theMPEG-1 format. The quality of the exported movie is almost the same, but usuallybetter than VHS tape-based movies. A VCD can be played back on a CD-ROMdrive, VCD player, and even on a DVD player.Super Video CD (SVCD) is commonly described as an enhanced version of VCD.It is based on MPEG-2 technology with Variable Bit Rate (VBR) support. The typicalrunning time of an SVCD is about 30-45 minutes. Although you could extend thisto 70 minutes, you will have to compromise sound and image quality. SVCDs canbe played back on stand-alone VCD/SVCD players, most DVD players, and all CD-ROM/DVD-ROM with a DVD/SVCD player software.
