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.tor.

Type Definition

CODE

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

CODE

 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.