en:wiki:funktionen:td-functions:phase_extraction
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en:wiki:funktionen:td-functions:phase_extraction [27/06/2016 02:21] – hamish | en:wiki:funktionen:td-functions:phase_extraction [30/06/2016 18:22] (current) – hamish | ||
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- | **This page is not fully translated, yet. Please help completing the translation.** \\ | ||
- | //(remove this paragraph once the translation is finished)// | ||
- | ====== | ||
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====== Phase Extraction ====== | ====== Phase Extraction ====== | ||
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**Description: | **Description: | ||
- | Below the lower limit and above the upper limit specified frequency, the frequency response of the loaded curve is straightened. | + | Below the lower limit and above the upper limit specified frequency, the frequency response of the loaded curve is made flat. |
\\ | \\ | ||
- | **Options: ** \\ | + | **Options: ** |
- | //Minimum phase: // \\ | + | |
- | //Linear phase: // \\ | + | |
- | //Excess phase: // \\ | + | |
- | //Advanced mixed phase:// | + | |
+ | | ||
+ | \\ **Use:** \\ The choice of correction filter for a mixed-pulse response may be due principally to the amount of acceptabe delay. For pure audio reproduction this usually does not matter. In the case of video or live music, a large delay may not be acceptable. Here the shortest lead time is achieved with a minimum phase correction filter. But no excess phase is corrected. | ||
- | \\ | ||
- | **Use:** \\ | ||
A limited band of frequency response can be used for a correction with this function with the frequency response information discarded above or below the selected spectrum (that is, the frequency response output of this funtion is a horizontal straight line below the lower limit and above the higher limit). This function is required, for example to use a near-field recording of frequency response of a speaker driver [[: | A limited band of frequency response can be used for a correction with this function with the frequency response information discarded above or below the selected spectrum (that is, the frequency response output of this funtion is a horizontal straight line below the lower limit and above the higher limit). This function is required, for example to use a near-field recording of frequency response of a speaker driver [[: | ||
- | \\ | + | \\ **Example: |
- | **Example: | + | |
- | In the following example, a correction filter | + | |
- | \\ | + | \\ \\ {{: |
- | \\ | + | |
- | {{: | + | |
- | Made for the next step two possibilities: | + | In this case it is important that the uncorrected range of frequencies above approximately 150hz have the same gain applied by the filter, otherwise it will affect the balance of the channels. So for the next step there are two possibilities: |
- | \\ | + | |
- | {{: | + | |
- | \\ | + | |
- | {{: | + | |
- | \\ | + | |
- | In this example, zoomed into the intersection at about 150HZ and clicked the exact point of intersection with the left mouse button. Then you get on the right side of the program window, the frequency at which the mark has been set.\\ | + | |
- | \\ | + | |
- | \\ | + | |
- | \\ | + | |
- | \\ | + | |
- | \\ | + | |
- | {{: | + | |
- | Now activate the curve 1 on the radio button and select TD Functions> | + | Now activate the curve 1 on the radio button and select TD Functions> |
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- | \\ | + | |
- | \\ | + | |
- | {{: | + | |
- | \\ | + | |
- | After deleting the original | + | |
en/wiki/funktionen/td-functions/phase_extraction.1466994061.txt.gz · Last modified: 27/06/2016 02:21 by hamish