Chapter 8 Digital Media

Digital Media

Chapter 8

8

Chapter 8: Digital Media 2

Digital Audio Basics Digital representation of sound

8


Digital Audio Basics Sound cards are responsible for transforming

bits stored in an audio file into music, sound effects, and narrations– Digital signal processor

8


Bitmap Graphics Composed of a grid of dots

– Color of each dot is stored as a binary number

8


Scanners and Cameras Graphics software is used to modify or edit

bitmap graphics– Modify individual pixels to

• Retouch photographs• Wipe out red eye• MANY other fixes!

• Ethics of digital editing???

8


Image Resolution Expressed as the number of horizontal and

vertical pixels– Higher resolutions contain more data (larger file

size) and are higher quality Bitmaps do not have a fixed physical size

8


Image Compression Any technique that recodes data in an image

file so it contains fewer bits

8


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– DVD-video– PDA video

8


Video Transfer Raw, uncompressed formats are ideal for

editing Video capture software can:

– Decrease video display size– Reduce the frame rate– Compress data

8


Video Output

8


DRM Basics Digital rights management (DRM) is a

collection of techniques used by copyright holders to limit access and use of digital content

8


CD Copy Protection Copy protection refers to technologies

designed to prohibit consumers from copying content

8


DVD DRM Copy generation management is a digital

watermark that specifies the number of times a content stream can be duplicated

8 Today’s Fun Thought

Why doesn't glue stick to the inside of the bottle?

8 Quotable

When deeds speak, words are nothing

African proverb

Chapter 8 Digital Media

Technology

Transcript of Chapter 8 Digital Media