Coding Systems (AQA A-Level Computer Science): Flashcards
📚Flashcards
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Practise the cards
10 cards from this deck
ASCII: full name & bit count
ASCII: full name & bit count
American Standard Code for Info Interchange; 7-bit (128 chars)
How Unicode relates to ASCII codes
How Unicode relates to ASCII codes
ASCII codes integrated in Unicode; ASCII code for A stays same
Purpose of parity bit
Purpose of parity bit
Added to binary data to detect errors during transmission
What is a pixel?
What is a pixel?
Picture element; tiny dot on monitor display
Define colour depth
Define colour depth
Amount of memory allocated to each pixel
ADC acronym meaning
ADC acronym meaning
Analogue to Digital Converter
DAC acronym meaning
DAC acronym meaning
Digital to Analogue Converter
Define sampling (sound context)
Define sampling (sound context)
Converting analogue sound waves into digital form
Nyquist's Theorem: sampling rate rule
Nyquist's Theorem: sampling rate rule
Sample at least twice the highest frequency
Lossless vs lossy compression difference
Lossless vs lossy compression difference
Lossless: no data lost; Lossy: some data degradation