Is CD-i propietary?
Developers of CD-i software do not need a license, from a software point-of-view, CD-i is an open standard. Of course, as with all CD-types, the normal CD-pressing license fees need to be payed, but this is to be taken care of by the CD pressing plant. Manufacturers of CD-i (compatible) players need a license from Philips and Microware. 1.4 What is the Green Book Green Book is the informal name of the Compact Disc Interactive Full Functional Specification, as laid down by Philips, Sony and Microware. It is named after the green cover of the book, and it is in line with the other CD-systems which also bear their own “color”-identification (such as red for CD-Audio, yellow for CD-ROM and white for Video-CD). It sometimes also refered to as FFGB or Full Functional Green Book. The Green Book consitsts of the CD-i specification and the Microware OS-9 2.4 Technical Manual. In contrast to other CD-systems such as CD-Audio and Video-CD, the Green Book not only specifies the disc-format of the
