The authors demonstrate the first fully homomorphic encryption pipeline that computes STFT, Mel, MFCC, and gammatone features directly from raw audio, with approximate variants that improve accuracy in some private audio tasks.
an efficient algorithm for the cal- culation of a constant q transform
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Quantized Approximate Signal Processing (QASP): Towards Homomorphic Encryption for audio
The authors demonstrate the first fully homomorphic encryption pipeline that computes STFT, Mel, MFCC, and gammatone features directly from raw audio, with approximate variants that improve accuracy in some private audio tasks.