Video CD a few years later) on each side. The Laserdisc provided picture quality nearly double that of VHS tape and analog audio quality far superior to VHS. Philips later teamed up with Sony to develop a new type of disc, the compact disc or CD. Introduced in 1982 in Japan (1983 in the U.S. and Europe), the CD is about in diameter, and is single-sided. The format was initially designed to store digitized sound and proved to be a success in the music industry. A few years later, Philips decided to give CDs the ability to produce video, just like its
Photo CD their film negatives and transparencies. The Kodak Pro Photo CD Master Disc contains 25 images with maximum resolution of 6144 x 4096 pixels (six resolutions per file, Base/16 to 64 Base). This type is appropriate for 120 film, 4x5, but also for small picture film, if highest resolution is required. Separate from the Photo CD format is Kodak's proprietary "Portfolio CD" format, which combines Red Book CD audio and Beige Book PCD with interactive menus and hotspots on PCD images. Some standalone Philips Photo/Audio CD players could play Portfolio CDs, and Windows player application was freely available. The Kodak Portfolio