How CDs Work Stefanie Xenakis 2005. History of the CD * Introduced in 1980s Patented by Philip and SONY Goal 1: Large storage space *Goal2: Perfect.

Slides:

Advertisements

Similar presentations

Introduction to Storage Devices

Advertisements

Hard Disk CD-ROM.

Fundamentals of Audio Production. Chapter 6. 1 Fundamentals of Audio Production Chapter Six: Recording, Storing, and Playback of Sound.

CD-Rs. How do you add data to it? Using a CD burner It has a smooth reflective metal layer, which rests on top of a layer of photosensitive dye. When.

DIFFERENCE OF VCD AND DVD

Sound Situation Formats and Foundations. Cassette Tapes Introduced by the Music Industry.

Electronic Signals & Semiconductors by Alec D, Fisher D, & Ethan L.

How Do CD’s Work? By: Garrison Kinney CD’s The disc is 1.2mm thick 120mm in diameter 117mm of data area They can hold 783MB(Mega Bytes) of.

Adapted from CTAE Resource Network – Used with permission. PROFITT Curriculum Basic Computer.

The Basics A life of bumps and grooves. The Spiral Data stored on the disc in a counter-clockwise spiral. This gives it much more code for the space.

CD-ROM. The CD Family GStandards äRed Book (1982) covers CD & CD-DA äYellow Book (1985) covers CD-ROM Ûextended to cover CD-ROM/XA äGreen Book (1988)

Phonograph Invented by Thomas Edison-1877 Recorded sound on a tinfoil sheet that rotated on a cylinder Sound played back through a large horn.

MUSIC LISTENING FORMATS Submitted to: Mr Bouzane Submitted by: Shawna Pritchett.

Computer SCIENCE Data Representation and Machine Concepts Section 1.3

CD-ROM What Is CD-ROM? The CD-ROM (compact disc read-only memory) is a read-only optical storage medium capable of holding 660 megabytes of data (approximately.

How CD’s Work Speros Shepherd The Anatomy of a CD Piece of simple plastic- 4/100 of an inch thick Injection-molded, clear, polycarbonate piece of.

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.

1 Optical Data Storage Lena Lopatina, 4/26/ Outline 1.Analog and digital recording 2.CD Drive and CD Anatomy 3.CD Player construction 4.Data encoding.

 Introduction Introduction  Types of Secondary storage devices Types of Secondary storage devices  Floppy Disks Floppy Disks  Hard Disks Hard Disks.

DVD Vs. CD ECE-E443 Joshua Nguyen. Presentation Agenda Compare DVD and CD disc Overview DVD disc format Compare DVD and CD schematic DVD vs. CD vs. Blue-ray.

ASHIMA KALRA.  Hard disks.Hard disks.  Floppy disks.Floppy disks.  CD ROMs.CD ROMs.  DVDs.DVDs.

Unit 5, Lesson 13 Storage Technologies and Devices AOIT Computer Systems Copyright © 2008–2013 National Academy Foundation. All rights reserved.

How CDs, DVDs, and Video Game Discs are Made and Processed. A project on materials and elements used in making one of mankind’s most used discs by Matthew.

< BackNext >PreviewMain Section 1 Mirrors and Lenses Rays and the Path of Light Waves Because light waves travel in straight lines, you can use an arrow.

Computer Terms. Computer A machine designed to run programs and store information that you create.

Copyright © 2007 Heathkit Company, Inc. All Rights Reserved PC Fundamentals Presentation 17 – The CD-ROM Drive.

STORAGE IN COMPUTER By- Upendra Sharma. STORAGE DEVICE We can use storage device to save data in computer. It is divided in two parts- 1. Primary memory.

A CD is a fairly simple piece of plastic, about (1.2 mm) thick. Most of a CD consists of an injection-moulded piece of clear polycarbonate plastic. During.

Storage Devices: CD-ROM Drives Copyright © Texas Education Agency, All rights reserved. 1 Computer Maintenance.

The CD ROM True or False (Starter). The CD ROM True or False A CD ROM disk stores it’s data on a track in a spiral formation. If you were to unravel this.

Computer Hardware. History of Computing Code breakers in World War I and II developed the world’s first computers. In the 1950s and 1960s computers were.

Chapter 23 Properties of Light. Section 1: Objectives Use ray diagrams to show how light is reflected or refracted. Compare plane mirrors, concave mirrors,

Analogue and Digital Signals SL – Option C.1 HL – Core 14.1.

Compact Discs Rebecca Martin May The CD in General Invented in 1980s Used to hold music, data, or computer software Cheap and easy to distribute.

 Secondary storage (or external memory) - is not directly accessible by the CPU. Secondary storage does not loose the data when the device is powered.

Agenda Last class: Software and extensions Today: Memory –How computers store data –Number systems –Digitization.

STORAGE DEVICES Presentation By: Saurabh Mishra. A data storage device is a device for recording (storing) information (data). CD, Hard Disk and Flash.

CDs and DVDs  Are types of optical storage media that consists of a flat, round, portable disc made of metal plastic and lacquer.  Store software, data,

DVDs what they are and how they work. DVDs DVD originally stood for: D V D igital isc ideoVersatile?

Parts of the Computer. Monitor A monitor is a screen that displays a computer’s output. It is the most common output device. A monitor looks like a TV.

1 Introduction to Computers By Masseta ICT Dept. Mzumbe University.

HOW CDs WORK ? By Attapon Ashinetongkhum Paveen Suwannawat Surawut Suntalodom Pipat Shutishupibul Pipatpong Tuntivaranon.

Describing Storage Devices  Storage terms  Media is the material storing data  Storage devices manage the media  Magnetic devices use a magnet  Optical.

Digital technology Topic 14.1: Analogue and digital signals.

Storage Hardware Devices Presented by Hector Arreola Valentin Kifumbi Keely Ritchie-Boland.

CGMB113/ CITB 123: MULTIMEDIA TECHNOLOGY

People to People Communication Technology Education.

Components of CD Drives Drive head Actuator It is the unit that holds the main components of head together. It is responsible for movement of head. It.

Multimedia Devices Chapter 8. Multimedia Overview The term multimedia has different meanings for people because there are many types of multimedia devices.

Chapter4: Memory External Memory (2).

Digital Technology 14.1 Analogue and Digital Signals.

Multimedia CES Industries, Inc. Lesson 11.  Mass storage device which stores information optically instead of magnetically. CD-ROM CES Industries, Inc.

CD Player Control & Tracking Ece-e 443 Kai Chung Wong.

CSIT 301 (Blum)1 CD’s. CSIT 301 (Blum)2 The medium has changed, but the geometry is the same (almost) CD-ROMs are random access devices. CD, compact discs,

CD and DVD Technology using laser light to reproduce music and movies.

Engr: Sajida Introduction to computing Optical storage The storage devices which use laser to read data from or write data to the reflective surface store.

Unit 2 Lesson 3 Sound Technology

Presented by: Lalit mohan (Ece 3rd year)

McGraw-Hill Technology Education

Secondary Storage Devices

Unit 3 Lesson 6 Electronic Technology

Chapter I, Digital Imaging Fundamentals: Lesson IV

Digital Technology Topic 14.

CD-ROM CSC 370 (Blum).

Introduction to Storage Devices

How is sound captured for a CD

Lightwave Engineering

GCSE OCR 4 Storage Computer Science J276 Unit 1

Technology 4 Storage.

Unit-II Audio Systems -12 Marks.

Presentation transcript:

How CDs Work Stefanie Xenakis 2005

History of the CD * Introduced in 1980s *Patented by Philip and SONY *Goal 1: Large storage space *Goal2: Perfect Copies

CD Material *Mostly polycarbonate plastic *Impressed with microscopic bumps *Bumps arranged on CD as a spiral

*Order of materials: 1) Polycarbonate plastic 2)Thin reflective aluminum layer 3) Acrylic layer for protection CD Material (cont…)

CD Spiral *Starts from inside and goes to outside *Data track 0.5microns wide *1 micron= 1 millionth mm

*1.6microns separate one track from each other other *Stretched spiral is 3 miles CD Spiral (cont...)

CD Bumps/Pits *Minimum.83microns long *125 nanometers high *Nanometer=1 billionth of a meter *”Pits” from our view on aluminum side *”Bumps” at laser’s view

CD Components *CD player reads data *Disc drive has 3 important components that each have a job

1)Drive motor- spins disc( rpm) 1st Important Component

2)Laser/lens system-focus in on and reads bumps 2nd Important Component

3)Tracking system-aligns laser to follow track 3rd Important Component

Laser Focus *Passes plastic layer, reads bumps *Reflects off aluminum to receptor AKA optic-electronic device *Receptor detects changes in reflectivity

*Reflectivity on bumps is read differently than the CD lands *Reads 0s and 1s AKA digital signal *Digital signal enters DAC *DAC=digital analouge converter Laser Focus (cont…)

*DAC turns digital signal into sound waves *Sound waves go through AMP to boost sound through speakers *AMP=amplifier

Before the CD

Floppies

Records *Simpler version of CD *Instead of laser there’s a needle *Needle called a stylus *Stylus held in place by arm *Spirals are visible to eye

*Amplified through speakers like CD *speed must be exact * Too slow=pitch drops;Too fast=pitch rises Records (cont…)

Bibliography How CDs Work. May 3, Tsun-Hui, Yao Tang. Conpact Discs(CDs). May 3, 2005.

Bibliography What is a CD. May 3, Turntable History. May 3, 2005.

About Me My name is Stefanie Xenakis and I am thirteen years old. I am Greek and have been to Greece about 7 times. My birthday is October 28, 1991 and my favorite animal is a monkey. I have three dogs and one cat. All of my dogs are poodles. There names are Tina, Rocky, and Lucy. I play the flute and my favorite sports are volleyball and basketball.