Manual Reference Pages - COSINE (1)
cosine - generate a cosine window.
Generate a cosine window on the stdout in binary shorts or floats for a given size.
The size of the window can be given with time units (ms or s) or samples (no units). Time units are converted to samples using the given samplerate option.
The default ("Hamming=off") is a Hann or raised cosine window:
w[n] = 0.5 [ 1 - cos( TWOPI . n/(N-1) ) ]
The "Hamming=on" window is:
w[n] = 0.54 - 0.46 cos( TWOPI . n/(N-1) )
Both windows are defined for 0 <= n <= N-1 and are assumed to be zero otherwise.
A scale factor for the output.
Output datatype ("type=short" or "type=float").
Copyright (c) Applied Psychology Unit, Medical Research Council, 1995
Permission to use, copy, modify, and distribute this software without fee is hereby granted for research purposes, provided that this copyright notice appears in all copies and in all supporting documentation, and that the software is not redistributed for any fee (except for a nominal shipping charge). Anyone wanting to incorporate all or part of this software in a commercial product must obtain a license from the Medical Research Council.
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|SunOS 5.6||COSINE (1)||1 September 1993|