Technology Beyond the Standard
In order to better understand the implications of some of the items in the standard, this chapter will provide a bit of additional technical background. The material presented here cannot be considered to be complete, however. The selection of topics is based on many discussions and conversations about MPEG-4 with business-oriented professionals throughout recent years.
4.1. Why Do We Need Compression to Begin With?
Digitizing analog video signals expands physical bandwidth requirements. Physical transmission bandwidth or storage capacity is a natural resource that is scarce and thus expensive. This is where compression of digital data comes into play—to make transmission and storage of digital data economically ...