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Digital multimedia elements - Coggle Diagram
Digital multimedia elements
video
factors affecting the quality
frame size
VCD : 352*288
DVD:720*576
compression method
VCD:MPEG-1
DVD:MPEG-2
Ipad and psp:MEPG-4
ONLINE:WMV/RealMedia
duration
TIME
frame rate
30 fps
colour depth
VCD/DVD: 24/32 bits
HARDWARE
TV tuner card
video capture card
format example
WMV
MPEG-1
MPEG-2
MPEG-4
MP4
MOV
digital video and web cams
charge-coupled deviced
graphics
bitmap
pixel
the number of bits representing
colour depth
1 /8 / 24 bits
resolution
measured in pixel per inch(ppi)
large in size
digital images
75 to 95 ppi
photograph printing
200 - 400 ppi
JPEG , BMP ,GIF
application
digital photographs
scanned pictures
software tools
adobe photoshop., Corel Photolmpact, CorelPoint
vector graphic
Shapes . lines or text
application
line arts
Illustrations
simple chart
software tools
Freehand
Adobe Flash
Adobe illustrator
Corel Draw
Audio
audio type
Voice over telephone
16-bit
sampling rate(Hz):22050
FM broadcast
16-bit
sampling rate(Hz):22050
Compact disc
8-bit
sampling rate(Hz):11025
DVD
24-bit
sampling rate(Hz):96000
hardware
sound card
electronic circuit board
for conversation
file format example
WAV
MP3
WMA
RA
Higher sampling rate
closer the original audio
determined
sampling rate
the bit resolution(number of bits per sample)
the number of channel
silicon chips
Analog-to-digital converter
digital to analogue converter
analogue data and digital data
Way of measurement
digital data
usually text or 0/1
analogue data
continuous signals
Efficiency on data storage
analogue data
Smaller size
VCR
digital data
Larger size
DVD
Accuracy of information
Replication
analogue data
Nearly impossible
digital data
error-free
Mode of data access
digital data
direct access
analogue data
sequential access
Efficiency on data analysis
analogue data
low
digital data
high
conversion between analogue and digital data
digitization
sampling
quantization
applications
binary forms
example
graphics
audio
video
computer programs
make efficient
storage
transmission
manipulation
duplication