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Ch.4 Digital Multimedia Elements - Coggle Diagram
Ch.4 Digital Multimedia Elements
Graphics
Bitmap
Vector graphics
Audio
Digitised data of music , speech \ audio signals
Bit resolution + Sampling rate = quality of digital audio file
Bit resolution
amplitude of audio signals = no. bits.
Higher no. bits = precise amplitude
Smapling rate
Samples taken during conversion
Hz
Higher sampling rate = better quality
Types of audio
Stereo Audio
left sound track
Right sound track
Mono Audio
1 sound track
Compressed Audio
Uncompressed Audio
Video
sequence of full-motion images + sound tracks
Factor affects Video file size
Frame size
Frame rate
Duration
Compression method
Colour depth
Higher Fame size\frame rate = Better Video quality
Analogue & digital data
Characteristics
Way of measurement
Efficiency of data storage
Efficiency on transmission
Accuracy of information
Replication
Applications
Transfer data
Duplicate data
Store data
Transfer processed data
output data
Conversion
Converting analogue data into digital data
Sampling
Quantization
Data --> Digital Code (predefined scale)
Conversion of Multimedia elements
Audio
Processed by : ADC , DAC
Quality is determined by the sampling rate , bit resolution , no. channels
Video
Video capture Card
TV tunner card
Charged-coupled devices (CCD) converts analogue video -> Digital video data
Image
Resolution
Colour depth
Colour model
File format recommended
Compression
There's Always information lost in the process