ScaleOffset

Overview

Scales a signal and then adds an offset

Discussion

The ScaleOffset module scales the input signal, and adds a fixed (DC) offset. The module is useful for specific nonlinearities, as well as in dynamics processing, where the scale and offset can occur in the log domain. If the input is complex, the same gain and offset are applied equally to both the real and imaginary parts.

The output is computed on a sample by sample basis according to the formula: y[n]=gain * x[n] + offset

Module Pack

Standard

ClassID

classID = 23

Type Definition

typedef struct _ModuleScaleOffset
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
FLOAT32 gain;                                 // Linear gain.
FLOAT32 offset;                               // DC offset.
} ModuleScaleOffsetClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
gain	float	parameter	0	1	-10:10
offset	float	parameter	0	1	-10:10

Pins

Input Pins


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

Output Pins


Name	out
Description	Output signal
Data Type	float

Matlab Usage

File Name: scale_offset_module.m 
 M=scale_offset_module(NAME) 
 Creates a scale and offset object for use with the Audio Weaver 
 environment. 

 Arguments: 
    NAME - name of the module.