Analog Devices VISUALDSP++ 3.5 Manual page 484

DSP Run-Time Library Reference
gen_hanning
generate hanning window
Synopsis
#include <window.h>
void gen_hanning_fr16(w,a,N)
fract16 w[];
int a;
int N;
Description
This function generates a vector containing the Hanning window. The
length of the window required is specified by the parameter
stride parameter
vector . The length of the output vector should therefore be
w
window is also known as the Cosine window.
Algorithm
= −
w [ n ] 0 5 . 0 5 . cos
where n = {0, 1, 2, ..., N-1}
Domain
a > 0; N > 0
4-68
/* Window vector
/* Address stride in samples for window vector */
/* Length of window vector
is used to space the window values within the output
a
π
2 n
 
 
−
N 1
 
VisualDSP++ 3.5 C/C++ Compiler and Library Manual
, and the
N
. This
N*a
for ADSP-219x DSPs
*/
*/