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Mobile Communication Broadcast System Jochen Schiller

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Sonali Chauhan
Sonali Chauhan

Unidirectional broadcast systems like radio and television distribute information to many users regardless of individual needs. As these systems transition to digital formats, they will be able to transmit multimedia content like audio, video and images at low cost alongside traditional broadcasts. Digital Audio Broadcasting (DAB) uses orthogonal frequency-division multiplexing (OFDM) and other techniques to transmit digital signals by radio.

TechnologieBusiness
1 von 24
6.Broadcast Systems Sonali C. UDIT - M.Sc (IT) 2008-09
INTRODUCTION ,[object Object],[object Object],[object Object],[object Object],[object Object]
UNIDIRECTIONAL DISTRIBUTION SYSTEM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Cont

UNIDIRECTIONAL DISTRIBUTION SYSTEM ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Cont

UNIDIRECTIONAL DISTRIBUTION SYSTEM ,[object Object],[object Object],[object Object],[object Object],[object Object],Cont

BROADCAST TRANSMISSION sender receiver receiver receiver unidirectional distribution medium A A A A A A A B B B B optimized for expected access pattern of all users individual access pattern of one user ï‚č
CYCLICAL REPETITION OF DATA ,[object Object],[object Object],[object Object],[object Object]
CYCLICAL REPETITION OF DATA Structuring transmissions – broadcast disks ,[object Object],[object Object],[object Object],Cont
 Every block is transmitted at regular interval of time Average Waiting time is same Favor one or more data block by repeating Distribute blocks more often than others in cyclic pattern Minimize delay if user wants to access Incr probability of receiving repeated locks..if corruped frst time A B C A B C flat disk A A B C A A skewed disk A B A C A B multi-disk
CYCLICAL REPETITION OF DATA Structuring transmissions – broadcast disks ,[object Object],[object Object],[object Object],[object Object],Cont

DAB:DIGITAL AUDIO BROADCASTING ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],DAB-Transport Mechanism Cont

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],DAB-Transport Mechanism Cont

DAB- Transmission frame Cont
 synchronization channel SC main service channel FIC MSC null symbol phase reference symbol data symbol data symbol data symbol . . . . . . symbol T u frame duration T F guard interval T d L 0 0 1 2 L-1 1 L fast information channel FIC DAB Frame structure
DAB- Sender Cont
 Trans- mitter Trans- mission Multi- plexer MSC Multi- plexer ODFM Packet Mux Channel Coder Audio Encoder Channel Coder DAB Signal Service Information FIC Multiplex Information Data Services Audio Services Radio Frequency FIC: Fast Information Channel MSC: Main Service Channel OFDM: Orthogonal Frequency Division Multiplexing 1.5 MHz f carriers
DAB- Receiver Cont
 Packet Demux Audio Decoder Channel Decoder Independent Data Service Audio Service Controller Tuner ODFM Demodulator User Interface FIC Control Bus (partial) MSC
MULTI-MEDIA OBEJCT TRANSFER PROTOCOL ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
MOT Structure ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],header core header extension body 7 byte
DIGITAL VIDEO BROADCASTING ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DIGITAL VIDEO BROADCASTING SDTV EDTV HDTV Multimedia PC B-ISDN, ADSL,etc. DVD, etc. Terrestrial Receiver Cable Multipoint Distribution System Satellites DVB Digital Video Broadcasting Integrated Receiver-Decoder DVB-S DVB-C DVB-T
DVB Container ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
multimedia data broadcasting MPEG-2/DVB container single channel high definition television MPEG-2/DVB container HDTV multiple channels standard definition MPEG-2/DVB container SDTV multiple channels enhanced definition MPEG-2/DVB container EDTV
Example- High Speed internet Access ,[object Object],DVB-S adapter PC Internet TCP/IP leased line service provider information provider satellite provider satellite receiver DVB/MPEG2 multiplex simultaneous to digital TV
Convergence of broadcasting and mobile comm. ,[object Object],[object Object],[object Object]
mobile terminal DVB-T, DAB (TV plus IP data) GSM/GPRS, UMTS (IP data) MUX Internet TV broadcaster ISP mobile operator TV data broadcast interaction channels

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Mobile Communication Broadcast System Jochen Schiller

  • 1. 6.Broadcast Systems Sonali C. UDIT - M.Sc (IT) 2008-09
  • 2.
  • 3.
  • 4.
  • 5.
  • 6. BROADCAST TRANSMISSION sender receiver receiver receiver unidirectional distribution medium A A A A A A A B B B B optimized for expected access pattern of all users individual access pattern of one user ï‚č
  • 7.
  • 8.
  • 9.
  • 10.
  • 11.
  • 12.
  • 13. DAB- Transmission frame Cont
 synchronization channel SC main service channel FIC MSC null symbol phase reference symbol data symbol data symbol data symbol . . . . . . symbol T u frame duration T F guard interval T d L 0 0 1 2 L-1 1 L fast information channel FIC DAB Frame structure
  • 14. DAB- Sender Cont
 Trans- mitter Trans- mission Multi- plexer MSC Multi- plexer ODFM Packet Mux Channel Coder Audio Encoder Channel Coder DAB Signal Service Information FIC Multiplex Information Data Services Audio Services Radio Frequency FIC: Fast Information Channel MSC: Main Service Channel OFDM: Orthogonal Frequency Division Multiplexing 1.5 MHz f carriers
  • 15. DAB- Receiver Cont
 Packet Demux Audio Decoder Channel Decoder Independent Data Service Audio Service Controller Tuner ODFM Demodulator User Interface FIC Control Bus (partial) MSC
  • 16.
  • 17.
  • 18.
  • 19. DIGITAL VIDEO BROADCASTING SDTV EDTV HDTV Multimedia PC B-ISDN, ADSL,etc. DVD, etc. Terrestrial Receiver Cable Multipoint Distribution System Satellites DVB Digital Video Broadcasting Integrated Receiver-Decoder DVB-S DVB-C DVB-T
  • 20.
  • 21. multimedia data broadcasting MPEG-2/DVB container single channel high definition television MPEG-2/DVB container HDTV multiple channels standard definition MPEG-2/DVB container SDTV multiple channels enhanced definition MPEG-2/DVB container EDTV
  • 22.
  • 23.
  • 24. mobile terminal DVB-T, DAB (TV plus IP data) GSM/GPRS, UMTS (IP data) MUX Internet TV broadcaster ISP mobile operator TV data broadcast interaction channels