User Tools

Site Tools


en:wiki:funktionen:td-functions:reversion

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
en:wiki:funktionen:td-functions:reversion [02/01/2021 18:40]
hamish
en:wiki:funktionen:td-functions:reversion [02/01/2021 18:42] (current)
hamish
Line 26: Line 26:
 <font 14px/Arial, sans-serif;;​initial;;#​ffffff>​The purely min-phase loudspeaker becomes a purely excess-phase filter. If you convolve or filter the loudspeaker with this reversed pulse, the result is purely linear-phase,​ i.e. mirror-inverted. This can also be seen here in the inverted phase of both, as curve 2 (green) behaves more or less like a compensation filter:</​font>​ <font 14px/Arial, sans-serif;;​initial;;#​ffffff>​The purely min-phase loudspeaker becomes a purely excess-phase filter. If you convolve or filter the loudspeaker with this reversed pulse, the result is purely linear-phase,​ i.e. mirror-inverted. This can also be seen here in the inverted phase of both, as curve 2 (green) behaves more or less like a compensation filter:</​font>​
  
-<font 14px/Arial, sans-serif;;​initial;;#​ffffff></​font>​+{{:​en:​wiki:​funktionen:​td-functions:​reversion6us5b.png?​nolink&​500x265}} 
 + 
 +{{:​en:​wiki:​funktionen:​td-functions:​reversion_phasebts4f.png?​nolink&​500x261}}
  
 <font 14px/Arial, sans-serif;;​initial;;#​ffffff>​(in the example above, both pulses were rotated on sample 0)</​font>​ <font 14px/Arial, sans-serif;;​initial;;#​ffffff>​(in the example above, both pulses were rotated on sample 0)</​font>​
  
 <font 14px/Arial, sans-serif;;​initial;;#​ffffff>​In practice, however, the filter will be cleaned of amplitude and minphase beforehand in order to correct the pure excess phase distortion of the loudspeaker. This is done with "TD Functions - Extract Phase - Excess Phase" **after** the impulse has been windowed to a reasonable level beforehand (via Frequency Dependent Window).</​font>​ <font 14px/Arial, sans-serif;;​initial;;#​ffffff>​In practice, however, the filter will be cleaned of amplitude and minphase beforehand in order to correct the pure excess phase distortion of the loudspeaker. This is done with "TD Functions - Extract Phase - Excess Phase" **after** the impulse has been windowed to a reasonable level beforehand (via Frequency Dependent Window).</​font>​
- 
-{{:​en:​wiki:​funktionen:​td-functions:​reversion_phasebts4f.png?​nolink&​500x261}} 
  
  
en/wiki/funktionen/td-functions/reversion.txt · Last modified: 02/01/2021 18:42 by hamish