Short-time Energy and Zero Crossing Rate: sgn(x) - File Exchange

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Short-time Energy and Zero Crossing Rate

energy(x,wintype,winamp,winle... ENERGY Short-time energy computation.
sgn(x) SGN Modified signum function.
winconv(x,varargin) WINCONV Discrere time convolution of a sequence with a window.
zerocross(x,wintype,winamp,wi... ENERGY Short-time energy computation.
zcr_ste_so.m
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from Short-time Energy and Zero Crossing Rate by Nabin S Sharma
Compute the short time energy (STE) and short-time zero crossing rate (STZCR) of a signal.

sgn(x)

function y = sgn(x)
%SGN   Modified signum function.
%   For each element of X, SIGN(X) returns 1 if the element
%   is greater than or equal to zero, and -1 if it is
%   less than zero.
%
%   See also SIGN.
%
%   Author: Nabin Sharma
%   Date: 2009/03/15

y = (x>=0) + (-1)*(x<0);

Highlights from Short-time Energy and Zero Crossing Rate

Highlights from
Short-time Energy and Zero Crossing Rate