Upsampler

Overview

Multi-channel upsampler that inserts zeros between samples

Discussion

Multi-input upsampling module that expands the signal by a factor of L. The module uses the zero-padding method, i.e. when upsampling by a factor of L, the module will insert L-1 zeros between each sample. No filtering is incorporated within the module. It is expected that the user will incorporate the filters of their choice to systems that incorporate upsampling.

Module Pack

Advanced

ClassID

classID = 1351

Type Definition

typedef struct _ModuleUpsampler
{
ModuleInstanceDescriptor instance;            // Common Audio Weaver module instance structure
INT32 L;                                      // Interpolation factor. L-1 zeros inserted between each sample.
} ModuleUpsamplerClass;

Variables

Properties

Name	Type	Usage	isHidden	Default Value	Range	Units
L	int	const	0	2	1:1:1024

Pins

Input Pins


Name	in
Description	Input signal
Data type	{float, int, fract32}
Channel range	Unrestricted
Block size range	Unrestricted
Sample rate range	Unrestricted
Complex support	Real

Output Pins


Name	out
Description	Output signal
Data Type	{float, int, fract32}

Matlab Usage

File Name: upsampler_module.m 
 M=upsampler_module(NAME, L) 
 Creates a multi-input upsampler module for use in the Audio Weaver 
 environment. This module expands the signal by a factor of L by inserting 
 L-1 zeros between each sample. 

 Arguments: 
    NAME - name of the module. 
    L - interpolation factor. 

 The interpolation factor is set at construction time and cannot be changed 
 during tuning.