Data Representation

Binary
1. Unsigned
  1. 00101011 = 43
    1. 0------- => Most Significant Bit (MSB)
    2. -------1 => Least Significant Bit (LSB)
    3. 2^n -1
      1. 8-Bit 0-255 (256 values)
2. Signed
  1. Sign and magnitude
    1. -43 = 10101011
      1. MSB = Signed Bit (1 = - , 0 = +)
      2. Rest = positive number
  2. 2s compliment
    1. binary number (59) l 00111011 one's compliment l 11000100 ................................+1................ two's compliment = 01000101 (-59)
3. Binary Coded Decimal
  1. 123 => 1 = 0001, 2 = 0010 , 3 = 0011
  2. -37 = 1011 , 0000 , 0011 , 0111
  3. Every digit has it's own binary representation
4. Binary Arithmetic
  1. Addition
    1. 10011101 + ------------------- 11001110 ------------------- 01101011
  2. Subtraction
    1. 43 +- (20) 43 = 00101011 ..........20 = 00010100 .........-20 = 11101100 ........43-20 = 00101011 + ..................11101100 ................X00010111
      1. X = Arithmetic Flow
  3. Multiplication
    1. 11100 * 101 ------------------- 111100 ------------------- 1000000 ------------------- 1110000 ------------------- 10001100
      1. Long Multiplication
Representation of chars
1. ASCII (8-bit)
2. UNICODE (16 - bit)
  1. ASCII into Unicode (will work) Unicode into ASCII(won't since file is bigger)
3. Unicode used more in general purpose computers but because ASCII is smaller it is used in micro-computers like an Arduino board
Representation of Images
1. Raster
  1. Stored in pixels
  2. Ex: 320 * 200 (8 bit) = 64000 * 1 byte (if 16 -bit *2 bytes)
  3. Storage depends on resolution
  4. (jpeg, gif, bmp, tiff, png)
    1. supports transparancy (kaxex bojod u grizi)
2. Vector
  1. stored in shapes
  2. Image only resized quality is not restored
  3. (wmf , CAD)
Representation of Sound
1. Wave for Audio
  1. MP3
  2. sampling rate directly proportional to quality (24bit - 48k quality)
2. MIDI
  1. Stores as a series of instrument and sounds on soundcard
  2. Synthesizers, soundcards (Mother and Father to baby Wub)
Hexadecimal
1. 0-9 read as integers
  1. 10-15 read as A-F
2. Bin- Hex Hex - Bin
  1. Kemm taqsamom go 4-bit
3. 23c= 16^2*2 + 16^1 + *3 16^0 * 12 572 -------
4. Dec - Hex
  1. 350
    1. 21r l E 1 r .l 5 0 r l 1
      1. ans = 15E

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	Erstellt von aiden williams vor fast 9 Jahre