function BlackmanHarris(const Src: TVec; WindowMode: TSignalWindowMode): TVec;
Blackman-Harris window.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Src | TVec | |
| 2 | WindowMode | TSignalWindowMode |
Returns: TVec
Remarks:
Applies BlackmanHarris window to Src. Window functions are applied to the signal prior to conversion to frequency domain with the FFT algorithm, to reduce the spectral leakage. Their side-effect is a lower frequency resolution.
w[n] := 0.42323 - 0.49755*cos(2*Pi*n/(n-1)) + 0.07922*cos(4*Pi*n/(n-1))
0 <= n <= M - 1
Indexed: function BlackmanHarris(const Src: TVec; WindowMode: TSignalWindowMode; Index: Integer; Len: Integer): TVec;
Blackman Harris window.
| # | Name | Type | Description |
|---|---|---|---|
| 1 | Src | TVec | |
| 2 | WindowMode | TSignalWindowMode | |
| 3 | Index | Integer | start index |
| 4 | Len | Integer | element count |
Returns: TVec
Remarks:
Applies exact Blackman Harris window to Src vector from element at Index to element at Index + Len - 1.