Analogue and Digital. Digital and Analogue 1.What change is happening between 2008 and 2012? 2.List some of the ways that digital TV can be sent. 3.List.

Slides:

Advertisements

Similar presentations

REVISION What wave is missing and how does its frequency compare with gamma waves?(2)

Advertisements

Technology ICT Option: Data Representation. Data Representation In our everyday lives, we communicate with each other using analogue data. This data takes.

Analogue and Digital Signals We seem to live in an analogue world – things can be louder or quieter, hotter or colder, longer or shorter, on a “sliding.

WHAT’S THIS? ….. WHAT CHANGES? Uptown Funk 1 Uptown Funk 2. Uptown Funk 3.

Eee116j1 1 Digital Information Engineering Science EEE116J1 Prof Paul Maguire w.

27 March 2012Digital Signals C/W 27 th Mar 2012 Recap - Electromagnetic waves for communicating Keywords: optical fibre carrier wave modulation Objectives:

Chapter 4 - The World Was Once Analog Introduction Sound, Vibrations, And Analog Recording (phonograph record) - An analog device maintains an exact physical.

Comp 1001: IT & Architecture - Joe Carthy 1 Review Floating point numbers are represented in scientific notation In binary: ± m x 2 exp There are different.

DIGITAL COMMUNICATIONS.  The modern world is dependent on digital communications.  Radio, television and telephone systems were essentially analog in.

IT Systems Why Digital? EN230-1 Justin Champion C208 –

1 A Balanced Introduction to Computer Science, 2/E David Reed, Creighton University ©2008 Pearson Prentice Hall ISBN Chapter 12 Data.

P1f(ii) Data Transmission You will learn about: How Optical Fibres are used How interference is reduced

Analogue and Digital Signals SL – Option C.1. Signals When talking about electronics we will talk about ‘signals’ –This is simply the transfer of information.

Digital Revolution LOs: Describe an analogue and digital signal Contrast analogue and digital waves Argue whether digital is better than analogue Key words:

Representation of Data in Computer Systems

Sound Editing Techniques & Programs Combine Images with Audio.

CSCI-235 Micro-Computers in Science Hardware Part II.

Computers and Scientific Thinking David Reed, Creighton University Data Representation 1.

Multimedia def. Many forms Multimedia Text Hyperlinks Images Audio Animation Video Text Hyperlinks Images Audio Animation Video.

Data Types and Representation CS French Chapter 6 + Chapter 7 – Number Bases.

3 SIGNALLING Analogue vs. digital signalling oRecap advantages and disadvantages of analogue and digital signalling oCalculate signal transmission rates.

Analogue vs Digital. Analogue  Lots of different frequencies, lots of different amplitudes  Wave recorded as it is.

AS LEVEL ICT2 Processing Different Types of Information.

Jeopardy Vocabulary Which code? 34 Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy.

MULTIMEDIA DEFINITION OF MULTIMEDIA

CIS-325: Data Communications1 CIS-325 Data Communications Dr. L. G. Williams, Instructor.

Chapter 3. Lesson Objectives Equations Chapter

Binary! Why do computers use binary? Easy to detect the state of a switch – they’re either on or off! Using another base makes.

Types of Data. Numbers Text Pictures Sound Video.

M404 Multimedia Elements Form 4.

Multimedia ITGS. Multimedia Multimedia: Documents that contain information in more than one form: Text Sound Images Video Hypertext: A document or set.

Agenda Last class: Memory, Digitizing Numbers Today: Digitizing: Text

AGENDA Pick Up Quiz from the Side of the Room

Unit P3 – Waves Lesson 01 – Reflection and Refraction Aims: Understand that light is reflected from a mirror in a predictable way Understand the laws of.

Digital Broadcasting Future Development Directions Vincent Brulia Noah Ludington.

Introduction to Digital Media. What is it? Digital media is what computers use to; Store, transmit, receive and manipulate data Raw data are numbers,

1 IGCSE Physics Waves. 2 Lesson 8 – TIR and optical fibres Aims: To recall the meaning of critical angle c To recall and use the relationship between.

Unit 4, Lesson 12 How VoIP Communication Works AOIT Principles of Information Technology.

S3 INNOVATION SENDING SIGNALS. STARTER – IN YOUR GROUPS… Apart from speaking give three examples of ways that information can be sent from one place to.

CSCI-100 Introduction to Computing Hardware Part II.

Mobile Phones and Communications The History of Mobiles Phones I owned! – Mr. Marsh.

Processes Creation and Threads. Shared Resource Example The console is just a place where text can be printed by the application currently running. Program.

Analog and Digital Signals Binary Code 7th Grade Science.

ISNE101 – Introduction to Information Systems & Network Engineering WEEK 2.

Electromagnetic spectrum. Learning today – copy The main features and characteristics of the Electromagnetic spectrum The uses and dangers of EM spectrum.

Processing Data. Representing Numbers  Recap on Binary Numbers  Binary digit (1 or 0) – known as a ‘bit’, short for BInary digiT – bits generally grouped.

DATA REPRESENTATION: SOUNDS GCSE Computing. Learning Objective ■ To understand how sounds are represented in Binary ■ To be able to convert a sound wave.

Information in Computers. Remember Computers Execute algorithms Need to be told what to do And to whom to do it.

Data Representation. In our everyday lives, we communicate with each other using analogue data. This data takes the form of: Sound Images Letters Numbers.

Sound QUIZ. Representing Sound Files Name as many sound files as you can What is a benefit of switching from analogue to digital radio and TV? What does.

DATA Unit 2 Topic 2. Different Types of Data ASCII code: ASCII - The American Standard Code for Information Interchange is a standard seven-bit code that.

Data Representation: Sound

Image and Sound Representation

Data representation – Sound.

Level 3 Extended Diploma Unit 19 Computer Systems Architecture

physics-chemistry-interactive-flash-animation

Learning Objectives Be able to explain how sound can be sampled and stored in digital form. Understand how sampling rate affects digital audio quality.

Multimedia: Digitised Sound Data

KS4 Waves: Total Internal Reflection and Communication

Folders out, planners out…

Web Design and Development

Summer Term Year 10 Slides

Final Study Guide Arts & Communications.

KS4 Waves: Total Internal Reflection and Communication

Analogue and Digital Signals

Option: Data Representation

Option: Data Representation

WJEC GCSE Computer Science

Presentation transcript:

Analogue and Digital

Digital and Analogue 1.What change is happening between 2008 and 2012? 2.List some of the ways that digital TV can be sent. 3.List two advantages of digital television compared to analogue television. 4.How are analogue signal sent? 5.How are digital signals sent?

Analogue Radio

Analogue Signals

Digital Radio

The sound is ‘sampled’ The values are send using binary numbers Lets learn to count in binary

Counting in Binary There are 10 types of people in this world, those that understand binary and those who don’t.

Digital Signals

Are these digital or analogue? 1.A light switched on or off. 2.A CD (information stored as hole or no hole) 3.A light with a dimmer switch. 4.A continuous variable. 5.A discrete variable. 6.An AM radio signal. 7.A DAB radio signal.

Digital Music The binary data you are about to see is the result from breaking down 1 millisecond of CD quality music (The Beatles — Let It Be). 5 seconds worth at the same font size would have taken over 1000 pages, so try to imagine how much data is stored on a CD containing 20 tracks, each 4 minutes long!!!

Advantages of Digital Signals Digital signals are less prone to interference than analogue.

Why don’t digital signals suffer from interference?

Adding Noise

Advantages of Digital Signals Digital signals can be easily be processed by computers. –Text (SMS) messages –Picture (Bitmap) editing –Sound (Wave -.wav) editing Digital signals are less prone to interference than analogue.

Bitmaps Jpegs, Gifs and Tiffs are bitmaps. These are essential ‘paint by numbers’ The picture is made up of picture elements –Shortened to Pixels Each pixels has a number associated with it which refers to a colour

Advantages of Digital Signals Digital signals can send information faster –More information in the same amount of time –Interactive TV Digital signals are less prone to interference than analogue. Digital signals can be easily be processed by computers.

Tele-Text

Multiplexing We can send digital information quicker than its needed for real time communications This allows us to use the same wire to send more than one phone call, for example

What are the advantages of Digital Signals Digital signals are less prone to interference than analogue. Digital signals can be easily be processed by computers. Digital signals can send information faster