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DVD
Authoring Pre-production for DVD
is more complicated than pre-production for CD because so many more factors must be
considered. It is not just
There are several DVD formats, involving different combinations of layers of data and sides of the disc. The most common formats are:
The different formats involve different capacities.
The microscopic pits used to encode the material are of slightly different sizes depending on which type of DVD disc is being made. Pit lengths for a two-layer DVD disc (DVD-9, DVD-18) are somewhat longer than those for a single-layer disc to make up for any interference in reading the two layers. (Thus a single-layer, double-side disc has a greater capacity than a double-layer, single-side disc.)
Through its many alliances in the replication industry, Optical Disc Solutions can help you choose the best authoring source for your project. Once all the authoring decisions have been made, the master must be made.
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a matter of taking the raw data, digitizing it,
premastering, and inputting it. Many choices first must be made about which data will be
used and how they will be presented. Which format is best? How many audio tracks will
there be, and of which type? Will there be on-screen menus, and what will they describe?
How interactive will the disc be? These are just some of the questions that must be
addressed in the authoring process. 
A key concept in
the DVD authoring process is tradeoffs. The enormous data capacity of DVD allows for many
features - and they all use data. The person who wants to create a DVD disc must decide
how many, and which, features to include. Balancing the needs of audio, video, picture
quality, playback time, and subpictures is critical to the DVD authoring process.
