chapter 8 digital media
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Digital Media
Chapter 8
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Chapter 8: Digital Media 2
Digital Audio Basics Digital representation of sound
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Chapter 8: Digital Media 3
Digital Audio Basics Sound cards are responsible for transforming
bits stored in an audio file into music, sound effects, and narrations– Digital signal processor
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Chapter 8: Digital Media 4
Bitmap Graphics Composed of a grid of dots
– Color of each dot is stored as a binary number
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Chapter 8: Digital Media 5
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???
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Chapter 8: Digital Media 6
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
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Chapter 8: Digital Media 7
Image Compression Any technique that recodes data in an image
file so it contains fewer bits
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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
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Chapter 8: Digital Media 9
Video Transfer Raw, uncompressed formats are ideal for
editing Video capture software can:
– Decrease video display size– Reduce the frame rate– Compress data
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Chapter 8: Digital Media 10
Video Output
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Chapter 8: Digital Media 11
DRM Basics Digital rights management (DRM) is a
collection of techniques used by copyright holders to limit access and use of digital content
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CD Copy Protection Copy protection refers to technologies
designed to prohibit consumers from copying content
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DVD DRM Copy generation management is a digital
watermark that specifies the number of times a content stream can be duplicated
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8 Today’s Fun Thought
Why doesn't glue stick to the inside of the bottle?
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8 Quotable
When deeds speak, words are nothing
African proverb