Data compression : Advantages and disadvantages

ADVANTAGES OF DATA COMPRESSION :

  • Less disk space (more data in reality) (*)
  • Faster writing and reading (*)
  • Faster file transfer
  • Variable dynamic range
  • Byte order independent
    To obtain these advantages the compression and decompression must be carried out directly by writing and reading programs e.g. AS PART OF A STANDARD FILE FORMAT

DISADVANTAGES OF DATA COMPRESSION :

  • Added complication
  • Effect of errors in transmission
  • Slower for sophisticated methods (but simple methods can be faster for writing to disk.)
  • "Unknown’’ byte / pixel relationship (+)
  • Need to decompress all previous data (+)
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