2.6 Data representation

2.6 Data representation

1. Units of data

   • Bit
   • Nibble
   • Byte
   • etc.

2. Representations

   • Denary (Base 10)
     • Why we use denary
   • Hexadecimal (Base 16)
     • Why engineers use hex
   • Binary (Base 2)
     • Why computers use binary

3. Left and right binary shifts

   • Overflow errors

4. Check digits

   • Parity check
     • Even parity
     • Odd parity

5. Text representation

   • ASCII
   • Extended ASCII
   • UNICODE
   • Character set

6. Image representation

   • Bit depth
   • Resolution
   • Pixel
   • Metadata

7. Sound representation

   • Sample
   • Sampling frequency
   • Sample size
   • Bit rate

8. Logic gates

   • AND
   • OR
   • NOT

9. Compression

   • Lossy
   • Lossless