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Advanced High-Quality Resampler #258

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6 tasks
MineCake147E opened this issue Jun 20, 2022 · 0 comments
Open
6 tasks

Advanced High-Quality Resampler #258

MineCake147E opened this issue Jun 20, 2022 · 0 comments
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@MineCake147E
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Feature: Signal Processing 🎛️ Something related to signal processing Kind: Enhancement 📈 New feature or request Priority: Moderate 🚃 Something that is moderately prioritized Status: Working ▶️ Work in progress
Projects
1.0 Release

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@MineCake147E
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Background and motivation

Current SplineResampler has no optimization for down-sampling at all, relying on slow BiQuad LPF.
We need another resampler for down-sampling.

Ideas

  • Apply SIMD-friendly LPF
    • Wavelets like CDF 9/7 Wavelet
    • Further optimization of BiQuad filter might also be needed
  • Dynamic resolution scaling
    • Decimate or interpolate samples down or up to the maximum power-of-two multiple of source frequency less than target frequency, by wavelets.
  • Use existing SplineResampler for final interpolation
@MineCake147E MineCake147E added Kind: Enhancement 📈 New feature or request Feature: Signal Processing 🎛️ Something related to signal processing Status: Working ▶️ Work in progress Priority: Moderate 🚃 Something that is moderately prioritized labels Jun 20, 2022
@MineCake147E MineCake147E self-assigned this Jun 20, 2022
@MineCake147E MineCake147E added this to To do in 1.0 Release via automation Jun 20, 2022
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@MineCake147E MineCake147E

Labels
Feature: Signal Processing 🎛️ Something related to signal processing Kind: Enhancement 📈 New feature or request Priority: Moderate 🚃 Something that is moderately prioritized Status: Working ▶️ Work in progress
Projects
1.0 Release
  
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@MineCake147E