Chapter 8
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Chapter 8. Digital Media. Digital Sound. Digital Audio Basics Portable Audio Players MIDI Music Speech Recognition and Synthesis. Digital Audio Basics. Digital representation of sound. Digital Audio Basics. Sampling rate. Digital Audio Basics. Sound cards. Waveform Audio.

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Chapter 8

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Chapter 8

Chapter 8

Digital Media

Chapter 8: Digital Media


Digital sound

Digital Sound

  • Digital Audio Basics

  • Portable Audio Players

  • MIDI Music

  • Speech Recognition and Synthesis

Chapter 8: Digital Media


Digital audio basics

Digital Audio Basics

  • Digital representation of sound

Chapter 8: Digital Media


Digital audio basics1

Digital Audio Basics

  • Sampling rate

Chapter 8: Digital Media


Digital audio basics2

Digital Audio Basics

  • Sound cards

Chapter 8: Digital Media


Waveform audio

Waveform Audio

  • The most popular waveform audio formats include AAC, AIFF, MP3, RealAudio, Wave, and WMA

  • Audio or media player software allows you to record and play waveform audio files

  • You can embed waveform files into a Web page

Chapter 8: Digital Media


Midi music

MIDI Music

  • MIDI (Musical Instrument Digital Interface)

  • MIDI-capable sound cards contain a wavetable

Chapter 8: Digital Media


Midi music1

MIDI Music

MIDI music tends not to have the full resonance of waveform audio.

Chapter 8: Digital Media


Midi music2

MIDI Music

Music composition software

provides tools for entering notes, specifying instruments, printing sheet music, and saving compositions in formats

such as MIDI.

Chapter 8: Digital Media


Speech recognition and synthesis

Speech Recognition and Synthesis

  • Speech synthesis

  • Speech recognition

Chapter 8: Digital Media


Speech recognition and synthesis1

Speech Recognition and Synthesis

Chapter 8: Digital Media


Bitmap graphics

Bitmap Graphics

  • Bitmap Basics

  • Scanners and Cameras

  • Image Resolution

  • Color Depth and Palettes

  • Image Compression

  • Bitmap Graphics Formats

Chapter 8: Digital Media


Bitmap graphics1

Bitmap Graphics

  • Composed of a grid of dots

Chapter 8: Digital Media


Scanners and cameras

Scanners and Cameras

  • Graphics software is used to modify or edit bitmap graphics

  • Can require a lot

    of storage space

Chapter 8: Digital Media


Image resolution

Image Resolution

  • What is image resolution?

Chapter 8: Digital Media


Image resolution1

Image Resolution

  • File size of bitmaps can be reduced by cropping

Chapter 8: Digital Media


Image resolution2

Image Resolution

  • Pixel interpolation

Chapter 8: Digital Media


Color depth and palettes

Color Depth and Palettes

  • Color depth

  • Color palettes

Chapter 8: Digital Media


Color depth and palettes1

Color Depth and Palettes

Chapter 8: Digital Media


Image compression

Image Compression

  • What is image compression?

    • Lossless compression

    • Lossy compression

Chapter 8: Digital Media


Image compression1

Image Compression

Popular file compression

utilities, such as WinZip,

zip one or more files into

a new compressed file

with a .zip extension.

Chapter 8: Digital Media


Bitmap graphic formats

Bitmap Graphic Formats

Chapter 8: Digital Media


Vector and 3 d graphics

Vector and 3-D Graphics

  • Vector Graphics Basics

  • Vector-to-Bitmap Conversion

  • Vector Graphics on the Web

  • 3-D Graphics

Chapter 8: Digital Media


Vector graphics

Vector Graphics

Vector graphics use geometrical primitives, based on mathematical equations, to represent images in computer graphics.

Chapter 8: Digital Media


Vector graphics vs bitmaps

Vector Graphics vs. Bitmaps

  • Resizing

  • Storage space

  • Realism

  • Editing

Chapter 8: Digital Media


Vector graphic basics

Vector Graphic Basics

Chapter 8: Digital Media


Vector to bitmap conversion

Vector-to-Bitmap Conversion

  • Rasterization

  • Tracing software

Chapter 8: Digital Media


Vector graphics on the web

Vector Graphics on the Web

  • SVG (Scalable Vector Graphics) and Flash are vector graphic formats for the Web

  • Advantages of using vector graphics

Chapter 8: Digital Media


3 d graphics

3-D Graphics

  • Stored as a set of instructions

  • Rendering

  • Ray tracing

Chapter 8: Digital Media


3 d graphics1

3-D Graphics

Chapter 8: Digital Media


Digital video

Digital Video

  • Digital Video Basics

  • Video Output

Chapter 8: Digital Media


Digital video basics

Digital Video Basics

  • Uses bits to store color and brightness data for each video frame

  • Different kinds of digital videos:

    • Desktop video

    • Web-based video

  • Desktop, PDA, and Web Video

  • DVD-Video

Chapter 8: Digital Media


Video output

DVD-video

PDA video

Video Output

Chapter 8: Digital Media


Video output1

Video Output

Chapter 8: Digital Media


Digital rights management

Digital Rights Management

  • DRM Basics

  • Signal Scrambling and Digital Watermarks

  • CD Copy Protection

  • DVD DRM

  • DRM for Digital Downloads

Chapter 8: Digital Media


Drm basics

DRM Basics

  • Digital rights management (DRM)

    • Things that are sometimes allowed:

      • Time shifting (like a DVR)

      • Place shifting

      • Format shifting

Chapter 8: Digital Media


Signal scrambling and digital watermarks

Signal Scrambling and Digital Watermarks

  • Signal scrambling

  • Digital watermark

  • Broadcast flag

Chapter 8: Digital Media


Cd copy protection

CD Copy Protection

  • Copy protection

Chapter 8: Digital Media


Dvd drm

DVD DRM

  • Copy generation management

Chapter 8: Digital Media


Dvd drm1

DVD DRM

  • Analog protection system

  • CSS (Content Scramble System)

Chapter 8: Digital Media


Dvd drm2

DVD DRM

  • DVD region code

  • AACS (Advanced Access Content System)

Chapter 8: Digital Media


Drm for digital downloads

DRM for Digital Downloads

  • FairPlay

Chapter 8: Digital Media


Chapter 8 complete

Chapter 8 Complete

Digital Media

Chapter 8: Digital Media


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