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Q&A Why often times data compression causes data loss?

I understand data compression as making data structures nearer (if they are mere machine code without any abstract representation) or representing them in less and less abstract computer languages ...

2 answers  ·  posted 3y ago by deleted user  ·  edited 3y ago by deleted user

#2: Post edited by (deleted user) · 2021-04-22T05:49:47Z (over 3 years ago)
  • I understand data compression as making data structures nearer (if they are mere machine code without any abstract representation) or representing them in less and less abstract computer languages (from the "complicated" to the "simple").
  • If so;<br>
  • Why often times data compression causes data loss?<br>
  • I, as a humble webmaster, don't understand why either "removing gaps" to re-organize data better (as in data defragmentation) or a simpler representation (simpler machine code in computer memory) would neccessate data loss.
  • ---
  • I think that my question stands whether the data we work with is "archived" or "not archived".
  • I understand data compression as making data structures nearer (if they are mere machine code without any abstract representation) or representing them in less and less abstract computer languages (from the "complicated" to the "simple").
  • If so;<br>
  • Why often times data compression causes data loss?<br>
  • I don't understand why either "removing gaps" to re-organize data better (as in data defragmentation) or a simpler representation (simpler machine code in computer memory) would neccessate data loss.
  • I think that my question stands whether the data we work with is "archived" or "not archived".
  • ---
  • **Update_note:** Given the answers and the downvotes I guess I misunderstood the little I have read about this topic, as well as confused it with defragmentation.
#1: Initial revision by (deleted user) · 2021-04-19T16:15:28Z (over 3 years ago)
Why often times data compression causes data loss?
I understand data compression as making data structures nearer (if they are mere machine code without any abstract representation) or representing them in less and less abstract computer languages (from the "complicated" to the "simple").

If so;<br>
Why often times data compression causes data loss?<br>
I, as a humble webmaster, don't understand why either "removing gaps" to re-organize data better (as in data defragmentation) or a simpler representation (simpler machine code in computer memory) would neccessate data loss.

---

I think that my question stands whether the data we work with is "archived" or "not archived".