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Digital Broadcasting is History

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Digital Broadcasting is History

  1. 1. DBSF Caribbean 2012 1 Digits
  2. 2. DBSF Caribbean 2012 2 Digital broadcasting is history Everything takes time to get through the system
  3. 3. DBSF Caribbean 2012 3 Digital broadcasting doesn’t work The system is riddled with errors
  4. 4. DBSF Caribbean 2012 4 Digital broadcasting is too fat It takes up more space than analogue
  5. 5. DBSF Caribbean 2012 5 Digital broadcasting is brilliant as long as … The errors are corrected The data is compressed
  6. 6. DBSF Caribbean 2012 6 Digital errors are only ever … A bit is missing A 1 is mistaken for a 0 A 0 is mistaken for a 1
  7. 7. DBSF Caribbean 2012 7 Digital compression is either… Lossless or Lossy
  8. 8. DBSF Caribbean 2012 8 To compress a balloon into a smaller space, untie the neck and let the air out. Reinflate ( and tie up the neck ) to get back the balloon as good as new. This is LOSSLESS compression
  9. 9. DBSF Caribbean 2012 9 To compress a balloon into a smaller space, prick it with a pin. Reinflation NOT possible but the bits of balloon still look a little like a balloon This is LOSSY compression
  10. 10. DBSF Caribbean 2012 10 To AGAIN compress that balloon into a smaller space, cut off the shredded rubber. Reinflation or repair NOT possible but the wee bit of the balloon still looks a little like a balloon This is CONCATENATED LOSSY compression
  11. 11. DBSF Caribbean 2012 11 Digital broadcasting is brilliant as long as … The errors are corrected The data is compressed
  12. 12. DBSF Caribbean 2012 12 Digits

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