1. BROADCAST SYSTEMS Symmetrical Communication System – same trasmission capabilities in both communication directions a-b,b- a. Eg.Telephones, GSM Asymmetrical Communication System - Client /Server Environments (Client need more data than server) www -Television Setup Box –Movies & Shopping Information (Between Channels) UNIDIRECTIONAL BROADCAST SYSTEMS - High Bandwidth data stream exists from one sender to many receivers -Sender Optimizes the transmitted data for the whole group of user

2. BROADCAST TRANSMISSION

3. Cyclical Repetition of Data Broadcast sender doesn't know when a receiver starts listen to transmission Cyclical representation of data blocks send via broadcast is BROADCAST DISK

4. Digital Audio Broadcasting Single Frequency Network VHF /UHF DQPSK –Modulation FEC & Uses Guard Spaces Two Mechanisms (i) Main Service Channel (Msc) (ii) Fast Information Channel (FIC)

5. DAB Mechanisms

6. DAB SENDER

7. DAB RECEIVER

8. Multimedia Object Transfer Protocol Broad Range of Different Receiver Capabilities Atleast able to recognize all program associated data DAB defines a standard for Data Transmission MOT (to support all data formats)

9. Formats MHEG -> Multimedia&HyperMediaInformation Coding Experts Group JAVA JPEG –> Joint Photographic Experts Group ASCII MPEG -> Moving Pictures Experts Group HTML,HTTP,BMP GIF-> Graphics Interchange Format

10. MOT Structure

11. Digital Video Broadcasting

12. DVB

13. Convergence of Broadcasting and Mobile Communication