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.

The output is computed on a sample by sample basis according to the formula: $y[n]=\textrm{gain} \times x[n] + \textrm{offset}$

Type Definition

CODE

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

CODE

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

 Arguments:
    NAME - name of the module.