TRANSPORT STRUCTURE FOR INTEGRATED SERVICES DIGITAL BROADCASTING

We discuss ISDB (Integrated Services Digital Broadcasting) which has a transport structure to meet the technical requirements such as the fl exibility and the extensibility of broadcasting in the future. The bas ic configuration of the ISDB transmission signal for distribution into various transmission channels is shown. Hybrid multiplexing, which us es common fixed-length packets and structured transmission units calle d ''slots,'' is introduced to construct a transmission signal for low- cost signal processing in ISDB receivers. We show that a fixed packet length of 40-240 bytes results in high transmission efficiency in a di verse range of service arrangements. Furthermore, we use transmission control methods, which show the relationship between programs and pack et IDs, to select the desired program with certainty and ease.