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Data Representation
- units of data
- Bit, Nibble, Byte, Kilobyte, Megabyte, Gigabyte, Terabyte
- Bit, Nibble, Byte, Kilobyte, Megabyte, Gigabyte, Terabyte
- Binary Numbers
- Binary allows ont two numbers 0 and 1
- Binary allows ont two numbers 0 and 1
- Binary addition
- when adding two numbers there are only 5 possible outcomes
- 0 + 0 = 0
- 0 + 1 = 1
- 1 + 0 = 1
- 1 + 1 = 10
- 1 + 1 + 1 = 11
- 0 + 0 = 0
- when adding two numbers there are only 5 possible outcomes
- overflow
- A CPU with a capacity of 8 bits has a capacity of up to 11111111 in binary. If one more bit was added
there would be an overflow error.
- A CPU with a capacity of 8 bits has a capacity of up to 11111111 in binary. If one more bit was added
there would be an overflow error.
- Hexadecimal numbers
- Hexadecimal is another numbering system, also known as base 16.
- There are 16 available digits - 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E and F.
- There are 16 available digits - 0,1,2,3,4,5,6,7,8,9,A,B,C,D,E and F.
- Hexadecimal is another numbering system, also known as base 16.
- Characters
- ASCII
- ASCII character require only seven bits, needs less storage space but can only store 128 characters
- ASCII character require only seven bits, needs less storage space but can only store 128 characters
- Unicode
- Unicode require 16 bits, needs more storage space but can store 65,536 different characters
- Unicode require 16 bits, needs more storage space but can store 65,536 different characters
- ASCII
- Images
- An image is divided into pixels, each of which is a tiny dot on the screen
- An image is divided into pixels, each of which is a tiny dot on the screen
- Sound
- Sampling rate
- its how often the computer takes a measure of the sound
- higher sampling rate, better sound quality
- higher sampling rate, better sound quality
- its how often the computer takes a measure of the sound
- Bit rate
- its how many bits are used for each samples
- higher bit rate, higher quality of sound
- higher bit rate, higher quality of sound
- its how many bits are used for each samples
- Sampling rate
Anexos de mídia
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