09_M1

Mere som dette

Policy Profession

af angie main

Pedagogy & Technology DigCompEdu Framework

af Michael Bennett

Outils numériques

af Abdelaziz Lakhmour

PRESENT SIMPLE (INDICATIVO PRESENTE)

af Saidi Rayan

Broadcasting systems

Radio

2 Types of Radio

Digital Radio

4. DRM ( Digital Radio Mondiale )

3. ISDB-TSB ( Intergated Services Digital Broadcasting - Terrestrial Sound Broadcasting )

2. DAB ( Digital Audio Broadcasting )

1. IBOC ( In- Band-On-Channel )

Analogue radio

2. FM ( Frequency Modulation

E.g Class95FM, 98.7FM, Gold90.5FM

1. AM (Amplitude Modulation)

Television

Internet

Digital Satellite Broadcasting

Digital Television

3 Types of digital Terrestrial Television Standards

ISDB-T (Integrated Services Digital )

DVB ( Digital Video Broadcasting )

ATSC ( Advanced Television Systems Committee )

Analogue Television

3 Types of Colour Transmission Standards

SECAM ( Sequential Couleur avec Memoire ) Countries like: etc. Syria, Benin.

NTSC ( National Television System Committee ) Counteries like: etc. North America, South Korea, Taiwan, Japan

PAL ( Phase Alternating Line ) Countries like: etc. Australia, China, India, New Zealand

Cable television

Analogue Waves

Frequency determines high or low pitch of the sound waves

Amplitude determines the intensity of sound waves

Sound wave is a analogue waves

Electromagnetic waves: 1. Radio waves 2. Microwaves 3. Infrared waves 4. Visible light 5. Ultraviolet-waves 6. X-rays 7. Gamma-rays

Period - Time taken to complete one wave cycle.

Frequency -Is the number of complete waves per unit of time.

WaveLength - Its period is measured between two successive wave crest, or 2 successive troughts

Amplitude -Refers to height of the signal, a distance from rest to crest.