Editing Inverse mix

Jump to: navigation, search

Warning: You are not logged in.

Your IP address will be recorded in this page's edit history.
The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
Latest revision Your text
Line 5: Line 5:
 
Similar techniques are used in image processing, to remove dust and scratches from scanned pictures or to cover so called hot pixels in digital photography ("dark frame subtraction").
 
Similar techniques are used in image processing, to remove dust and scratches from scanned pictures or to cover so called hot pixels in digital photography ("dark frame subtraction").
  
If you rip a [[Compact Disc Digital Audio|Audio CD]] and receive an error on one track, you may want to do two subsequent rips and compare them with this technique to isolate the position of possible clicks and other flaws.
+
If you rip a [[CD]] and receive an error on one track, you may want to do two subsequent rips and compare them with this technique to isolate the position of possible clicks and other flaws.
 +
 
 +
 
 +
==A Word of Warning==
  
== A Word of Warning ==
 
 
Many uninformed people use inverse mixing to rank the quality of [[psychoacoustic]] [[lossy]] audio encoders. They argue that the quieter the resulting residual (difference), the better the [[codec]]. However, '''this is fundamentally flawed'''. It is the goal of a psychoacoustic lossy encoder to remove all inaudible information from an audio signal. If you were to inverse mix the original and the encoded signal, you would see a large difference, but an ideal encode would still sound the same as the original. On the other hand, the difference could be very small and yet clearly audible.
 
Many uninformed people use inverse mixing to rank the quality of [[psychoacoustic]] [[lossy]] audio encoders. They argue that the quieter the resulting residual (difference), the better the [[codec]]. However, '''this is fundamentally flawed'''. It is the goal of a psychoacoustic lossy encoder to remove all inaudible information from an audio signal. If you were to inverse mix the original and the encoded signal, you would see a large difference, but an ideal encode would still sound the same as the original. On the other hand, the difference could be very small and yet clearly audible.
  

Please note that all contributions to Hydrogenaudio Knowledgebase are considered to be released under the GNU Free Documentation License 1.2 (see Hydrogenaudio Knowledgebase:Copyrights for details). If you do not want your writing to be edited mercilessly and redistributed at will, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource. Do not submit copyrighted work without permission!

Cancel | Editing help (opens in new window)