IT 380 A+: EXAM 2 ENGAGING THE LATEST UPDATE OF
QUESTIONS AND ANSWERS.
Reasons for using multimedia
Education, Training, Entertainment, Business
Education
teach potent skills
Training
teaching protocols
Entertainment
TV sets or monitors with user inputs
Business
presentations, marketing, advertisements
Digital audio
Bit depth determines sample size; stored as thousands of samples
MIDI
small (quick load and playtime); length can be changed without affecting pitch or
degrading audio quality
Sampling
converting analog sound to digital sound
How does sampling affect size?
the higher the sampling rate, the higher the quality and file size
Quantization
value of each sample is rounded to the nearest integer
How does quantization affect size?
reduces
Sampling rate
number of samples per second
Playback
the reproduction of previously recorded sounds or moving images
Quality
, accuracy, fidelity, or intelligibility of audio output
Clipping
occurs when min or max values are reached
Reasons for editing
get rid of unwanted noise, increase sound quality, fix timing
Ways to reduce file size
reduce number of channels, sample rate, bit depth, and apply compression
Red book standard for CD quality
16 bits at 44.1 kHz
Considerations of sound within a presentation
Determine end users sound capabilities, file formats must be compatible with
multimedia authoring software being used, sound playback capabilities offered by end
users' system must be studied
Reasons for using video
It's an excellent tool for delivering multimedia
Requirements for video
Places the highest performance demand on a computer and its memory storage
Overscan
used to make sure the edge of an image is always bounded by a screen
Safe title areas
rectangular area in which graphic or text can be shown neatly
Interlaced scan
used to provide good visual quality with narrow bandwidth
Progressive scan
each refresh updates the entire screen
Deinterlacing
used to convert interlaced to progressive
Codecs
the algorithm used to compress a video for delivery
Considerations of text in video
use large font; adjust the white balance
QUESTIONS AND ANSWERS.
Reasons for using multimedia
Education, Training, Entertainment, Business
Education
teach potent skills
Training
teaching protocols
Entertainment
TV sets or monitors with user inputs
Business
presentations, marketing, advertisements
Digital audio
Bit depth determines sample size; stored as thousands of samples
MIDI
small (quick load and playtime); length can be changed without affecting pitch or
degrading audio quality
Sampling
converting analog sound to digital sound
How does sampling affect size?
the higher the sampling rate, the higher the quality and file size
Quantization
value of each sample is rounded to the nearest integer
How does quantization affect size?
reduces
Sampling rate
number of samples per second
Playback
the reproduction of previously recorded sounds or moving images
Quality
, accuracy, fidelity, or intelligibility of audio output
Clipping
occurs when min or max values are reached
Reasons for editing
get rid of unwanted noise, increase sound quality, fix timing
Ways to reduce file size
reduce number of channels, sample rate, bit depth, and apply compression
Red book standard for CD quality
16 bits at 44.1 kHz
Considerations of sound within a presentation
Determine end users sound capabilities, file formats must be compatible with
multimedia authoring software being used, sound playback capabilities offered by end
users' system must be studied
Reasons for using video
It's an excellent tool for delivering multimedia
Requirements for video
Places the highest performance demand on a computer and its memory storage
Overscan
used to make sure the edge of an image is always bounded by a screen
Safe title areas
rectangular area in which graphic or text can be shown neatly
Interlaced scan
used to provide good visual quality with narrow bandwidth
Progressive scan
each refresh updates the entire screen
Deinterlacing
used to convert interlaced to progressive
Codecs
the algorithm used to compress a video for delivery
Considerations of text in video
use large font; adjust the white balance
