This version (18 May 2021 08:43) was approved by John Joseph.The Previously approved version (14 Jan 2021 11:01) is available.
Table of Contents
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Down Sampling
Description
The Down Sampling module is mainly used to get the input samples to a lower the process and sampling rate. For example the bass portion of the audio need not to be processed at higher sampling rates as the frequencies associated with bass are low.
This module takes the DownSample factor from the GUI parameters and down-samples the input accordingly.
Targets Supported
| Name | ADSP-214xx | ADSP-215xx/SC5xx | ADAU145x/146x |
|---|---|---|---|
| —————————— | ——————-- | ——————————-- | —————————- |
| Down-Sampler | B | B | S |
Pins
Input
| Name | Type | Description |
|---|---|---|
| ———————- | ————-- | ———————- |
| Input | Audio | Input channel |
Output
| Name | Type | Description |
|---|---|---|
| ———————- | ————-- | ———————- |
| Output | Audio | Down sampled output |
Configurable Parameters
ADSP-214xx/ADSP-215xx/ADSP-SC5xx
| GUI Parameter Name | Default | Range | Function Description |
|---|---|---|---|
| —————————————- | ———————- | —————— | —————————————- |
| Factor | 2 | 2,4,8,16,32 | The input sample rate will be divided by Factor |
| AntiAliasFilter | False | True/False | Enabled/Disabled the anti-alias filter. If enabled, anti-alias filter will be applied before DownSampling the signal |
ADAU145x/ADAU146x
| GUI Parameter Name | Default | Range | Function Description |
|---|---|---|---|
| —————————————- | ———————- | —————— | —————————————- |
| NumChannels | 1 | 1-20 | Number of channels |
| Factor | 2 | 2,3,4,6,8,16 | The factor at with the input sample rate will be divided |
DSP Parameters
| Name | Description | ADSP-214xx/215xx/SC5xx | ADAU145x/ADAU146x |
|---|---|---|---|
| ————————— | ———————————————————————————- | —————————————- | ————————-- |
| Factor | The factor at with the input sample rate will be divided | Float | FixedPoint8d24 |
| NFilterTaps | Number of antialiasing filter coefficients | Float | NA |
| FIRCoeffs | coefficients | Float | NA |
resources/tools-software/sigmastudiov2/modules/advanceddsp/downsampling.txt · Last modified: 12 May 2021 13:21 by John Joseph