Overview
Subband derivative
Discussion
Computes the derivative of frequency domain data individually within each subband. The derivative is defined as:
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The hidden internal array .lastValue stores the previous value x[n-1] between blocks. The length of the array is set by the prebuild function to the number of subbands.
Type Definition
| Code Block |
|---|
typedef struct _ModuleSbDerivative
{
ModuleInstanceDescriptor instance; // Common Audio Weaver module instance structure
FLOAT32 gain; // Additional gain.
FLOAT32* lastValue; // Previous value x[n-1].
} ModuleSbDerivativeClass; |
Variables
Properties
Name | Type | Usage | isHidden | Default value | Range | Units |
gain | float | parameter | 0 | 1 | -10:10 | linear |
lastValue | float* | state | 1 | [32 x 1] | Unrestricted |
Pins
Input Pins
Name: in
Description: audio input
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Sample rate range: Unrestricted
Complex support: Real
Output Pins
Name: out
Description: audio output
Data type: float
MATLAB Usage
File Name: sb_derivative_module.m
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