en:wiki:funktionen:td-functions:reversion
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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 |
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| <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}} |
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| + | {{: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> | ||
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| - | {{: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
