Signal Resampling

Summary

• Plugin name : Signal Resampling
• Version : 2.0
• Author : Quentin Barthelemy
• Company : Mensia Technologies SA
• Short description : Resamples and re-epochs input signal to chosen sampling frequency
• Documentation template generation date : Apr 20 2022

Description

The input signal is resampled, down-sampled or up-sampled, at a chosen sampling frequency and then re-epoched.

This plugin can apply a downsampling or an upsampling, to/from any sampling frequency, including non-integer sampling rate conversion.
The signal is low-pass filtered with a FIR filter to avoid spectral aliasing, using a sinc function-based fractional delay filter bank.

If the sampling rate is badly conditioned, this plugin can induce latency.

Inputs

1. Input signal

An input multichannel signal \( X \in \mathbb{R}^{C \times N_1} \), composed of \( C \) channels and \( N_1 \) temporal samples, at the sampling frequency \( F_1 \).

• Type identifier : Signal (0x5ba36127, 0x195feae1)

Outputs

1. Output signal

An output multichannel signal \( Y \in \mathbb{R}^{C \times N_2} \), composed of \( C \) channels and \( N_2 \) temporal samples, at the sampling frequency \( F_2 \).

• Type identifier : Signal (0x5ba36127, 0x195feae1)

Settings

1. New Sampling Frequency

New sampling frequency \( F_2 > 0 \). No processing is applied if \( F_2 = F_1 \).

• Type identifier : Integer (0x007deef9, 0x2f3e95c6)
• Default value : [ 128 ]

2. Sample Count Per Buffer

Number of temporal samples \( N_2 > 0 \) per resampled buffer.

• Type identifier : Integer (0x007deef9, 0x2f3e95c6)
• Default value : [ 8 ]

3. Low Pass Filter Signal Before Downsampling

Low-pass filtering activation, to avoid spectral aliasing.

• Type identifier : Boolean (0x2cdb2f0b, 0x12f231ea)
• Default value : [ true ]

Examples

Miscellaneous