COMMUNICATION SYSTEM I

INTRODUCTION

ICT stands for Information and Communications Technology. It is used to describe all devices that can be used to create, communicate, disseminate, store, manage and provide access to information. These devices include radio, television, mobile phones, computers, the Internet, satellite systems etc.

 

TYPES OF INFORMATION AND COMMUNICATIONS TECHNOLOGY (ICT)

There are different types of ICT, which include:

1. Broadcasting
2. Telecommunications
3. Data Networks
4. Information Systems
5. Satellite Communications

BROADCASTING

Broadcasting is the spreading or distribution of audio and video content over a wide area to a large audience through any electronic mass communications medium like radio, television, etc.

In computer networking, broadcasting refers to the simultaneous distribution of the same information to many recipients, which is made possible when a transmitted data packet is received by all network devices.

A data packet means small unit of data. Breaking communication down into packets allows the same data path to be shared among many users in the network.

Types of Broadcasting

There are three basic types of broadcasting, which are:

1. Radio Broadcasting
2. Television Broadcasting
3. Satellite TV System Broadcasting

 

1. Radio Broadcasting: This involves sending or transmitting information or entertainment signals to a large audience, who will receive or listen to it through a radio set. This can be via AM (Amplitude Modulation), FM (Frequency Modulation) or HD (High Definition) radio which transmits digital audio and Data along with AM and FM analog signals.
2. Television Broadcasting: This is the transmission of information or entertainment signals in form of moving images, with or without sound, from a television station to television sets. These signals are transmitted by UHF (Ultra High Frequency) or by VHF (Very High Frequency) waves. Television Program were first transmitted in analog format and now in digital format.
3. Satellite TV System Broadcasting: This is the transmission of audio and video signals from the television station to an orbiting satellite in space, which magnifies the signals and rebroadcasts it back to earth. These signals are captured by dish receivers placed on top of buildings and then converted by decoders to digital TV signals.