PeakFinder

Overview

Find peaks of input data

Discussion

This module finds a number of peaks per audio block as determined by the value of numPeaks. The module outputs the values of the found peaks and has an optional output pin to output at what index the peaks were found. The module will output peaks in descending order, and ignore nearby values as set by minDistanceSpacing. The output pin will have a block size the size of numPeaks with the same number of channels as the input.

Module Pack

Advanced

ClassID

classID = 1436

Type Definition

typedef struct _ModulePeakFinder
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
INT32 minDistanceSpacing;                     // Number of samples to ignore around found peak
INT32* histSkip;                              // Array indicator that indicies should be skipped when peak searching
} ModulePeakFinderClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
minDistanceSpacing	int	parameter	0	1	0:32
histSkip	int*	state	1	[32 x 1]	Unrestricted

Pins

Input Pins


Name	in
Description	Input Histogram
Data type	float
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real

Output Pins


Name	out
Description	Peak Values
Data Type	float

Matlab Usage

File Name: peak_finder_module.m 
 M = peak_finder_module(NAME) 
 Creates a peak finder module 

 Arguments: 
    NAME - name of the module. 
    NUMPEAKS - number of peaks to detect per audio block 
    INDEXPIN - boolean flag if you want an output pin to give you the 
               index of the peaks detected