The White Book refers to a standard of compact disc that stores not only sound but also still pictures and motion video.
These discs, most commonly found in Asia, are usually called "Video CDs" (VCD).
Several extensions to the White Book were published in later years: VCD 2.0 in 1995, VCD-Internet in 1997, and Super Video CD (SVCD) in 1998.
[2] The White Book also defines the more general CD-i Bridge format (also called CD-Bridge or simply "bridge discs"), which are CD-ROM XA discs with an additional Green Book CD-i specific application program.
Bridge discs must conform to both the CD-ROM XA and Green Book CD-i specifications.