Broadcasting

BROADCASTING

BY:- KOMAL CHOUDHARY

WHAT DOES IT MEAN??? USED TO DESCRIBE COMMUNICATION

CARRIES INFORMATION FROM ONE POINT TO ALL OTHERS

ONE SENDER AND MANY RECEIVERS

HISTORY

TERM ADOPTED BY EARLY RADIO ENGINEERS FROM MIDWESTERN US

VERY LARGE SEGMENT OF MASS MEDIA

COMPOSED OF ANALOG SIGNALS USING ANALOG TRANSMISSION

TYPES OF BROADCASTING

TELEPHONE BROADCASTING(1881-1932) RADIO BROADCASTING(1906-1920) TELEVISION BRAODCASTING(1925-1930) CABLE RADIO & TELEVISION(1928) DIRECT BROADCAST SATELLITE WEBCASTING

ROLE OF SATELLITE

ALLOWS RADIO, TELEVISION & TELEPHONE TRANSMISSION

TO BEND THE SIGNALS ROUND THE EARTH

LIVE BROADCASTING

LIVE BROADCASTING

LIVE TELEVISION LIVE RADIO INTERNET TELEVISION INTERNET RADIO LIVE BLOGGING STREAMING MEDIA

LIVE TELEVISION

BROADCAST IN REAL TIME

USED FOR ATTRACTING VIEWERS THROUGH:

1. ENTERTAINMENT2. NEWS3. TV EPISODES4. SPORTS

LIVE RADIO

BROADCAST WITHOUT DELAY

USED TO LISTEN:1. DRAMAS2. COMEDIES 3. QUIZ SHOWS4. CONCERTS

INTERNET TELEVISION

ONLINE TV

CONNECTED THROUGH INTERNET

DIGITAL DISTRIBUTION OF TELEVISION

VIDEO STREAMING TECHNOLOGY

INTERNET RADIO

AUDIO SERVICE THROUGH INTERNET.

MUSIC STREAMING ON INTERNET (WEBCASTING)

ACCESSIBLE FROM ANYWHERE

LIVE BLOGGING

Blog  post which is intended to provide a rolling textual coverage of an ongoing event.

Increased in usage by news organization.

Similar to live television or radio.

STREAMING MEDIA

PROCESS OF DELIVERING MEDIA.

RECEIVED BY USER AND DELIVERED BY PROVIDER.

STREAMING OF VIDEO AND AUDIO.

Digital audio broadcasting Analog radio system still

follow basic principle of frequency modulation.

Transmission quality varies greatly depending upon multi-path effects and interference.

It provides clear sound quality, immune to interference and multi-path propagation effects.

ADVANTAGES

Better signal to noise ratio.

Reduced interference

Possible signal frequency networks.

Less multi-path distortion.

Automatic tuning

Auxiliary data services.

TRANSPORT MECHANISMS1. Main service channel (MSC): Carries all user data, i.e audio,

multimedia data. Consists of common interleaved frames.2. Fast information channel: Contains fast information blocks. Controls all information required for

interpreting the configuartion and content of MSC.

COMPONENTS OF DAB sender

DIGITAL VIDEO BROADCASTING 1991 foundation of the

ELG (European Launching Group)goal: development of digital television in Europe

1993 renaming into DVB (Digital Video Broadcasting)goal: introduction of digital television based on satellite transmission cable network

technology later also terrestrial

transmission

DVB DATA BROADCASTING

1. Data pipe: Simple,

asynchronous, end to end delivery of data.

2. Data streaming: Streaming oriented,

asynchronous, synchronized, end to end data delivery.

3. Multiprotocol encapsulation:

Transport of data network protocol on MPEG-2 transport stream.

4. Data and object carousels:

Periodic transmission of data and objects, platform independent

DVB FOR HIGH SPEED INTERNET

Can be used for high-bandwidth, asymmetrical access.

An information provider.

User request for data.

With the help of satellite provides data to user.