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This version (18 May 2021 08:43) was approved by John Joseph.The Previously approved version (14 Jan 2021 11:01) is available.Diff

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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

NameTypeDescription
———————- ————-- ———————-
InputAudioInput channel

Output

NameTypeDescription
———————- ————-- ———————-
OutputAudioDown sampled output


Configurable Parameters

ADSP-214xx/ADSP-215xx/ADSP-SC5xx

GUI Parameter NameDefaultRangeFunction Description
—————————————- ———————- —————— —————————————-
Factor22,4,8,16,32The input sample rate will be divided by Factor
AntiAliasFilterFalseTrue/FalseEnabled/Disabled the anti-alias filter. If enabled, anti-alias filter will be applied before DownSampling the signal


ADAU145x/ADAU146x

GUI Parameter NameDefaultRangeFunction Description
—————————————- ———————- —————— —————————————-
NumChannels11-20Number of channels
Factor22,3,4,6,8,16The factor at with the input sample rate will be divided


DSP Parameters

NameDescriptionADSP-214xx/215xx/SC5xxADAU145x/ADAU146x
————————— ———————————————————————————- —————————————- ————————--
Factor The factor at with the input sample rate will be dividedFloatFixedPoint8d24
NFilterTaps Number of antialiasing filter coefficientsFloatNA
FIRCoeffs coefficientsFloatNA


resources/tools-software/sigmastudiov2/modules/advanceddsp/downsampling.txt · Last modified: 12 May 2021 13:21 by John Joseph