Authoring: CD-I process
- Developing a CD-I application involves many steps.
- The two main ones
are to assemble all the multimedia components and then to put together
the CD-I application and disc.
- Assembling components:
- Each media form is prepared and edited using a special editor.
- Key media forms include graphics, audio, text, and programs.
- Media forms are represented in a variety of format, each of which
supports different operations and has different space and processing
requirements. Thus text can be repesented as an ASCII string or as
a bitmap of a page image.
- CD-I graphics must be compact, and so uses RGB with 5 bits/pixel for
each color; or a small Color Look Up Table, or DYUV encoding for
- CD-I audio uses ADPCM compression
- CD-I systems run the CD-RTOS operating system and allow fine control
of real-time programs.
- Preparing application and disc:
- CD-I application authors must develop a score that gives
the sequencing and interaction.
- Direct testing can take place with CD-I hardware playing from a
hard drive, but the timing will be better than from a CD-I disc.
- Hence, an emulator allows a fast disk to look like a slow CD-I
system, by adding in delays. This helps with testing.
- An image of a CD-I disk must be prepared by running special
programs, which, for example, will interleave streams for faster
- A master disk results from the pre-mastering process, and then
many copies can be produced from the resulting stampers.
This info was taken from http://ei.cs.vt.edu/~mm/gifs/CDIauthor.html