PERFORMANCE OF MULTIMEDIA BROADCASTING THROUGH ISDB TRANSMISSION-SYSTEM

Multimedia broadcasting has the benefits of versatile information repr esentation, intelligent viewing environments, and economical systems. Integrated Services Digital Broadcasting (ISDB) presents a concept for future digital broadcasting systems, Full-scale multimedia broadcasti ng services can be realized by ISDB. There are two aspects in multimed ia broadcasting from the viewpoint of ISDB. One is ''transmission mult imedia'' and another is ''presentation multimedia.'' The former means that ISDB provides services by exploiting the characteristics of vario us types of broadcast channels, It also integrates all broadcast netwo rks and is interoperable with communications and package media, The la tter means that ISDB can flexibly combine and send various types of re presentation media that most appropriately convey the information. Mul timedia broadcasting by ISDB is expected to achieve interactive viewin g and to raise individual viewer satisfaction, ISDB will also make it possible to set up multiple small-scale broadcast stations and to prov ide a many-to-many information linking environment for transmitting in formation between an unspecified number of individuals.