2 papers
eess.AS2026
SELEBI: Percussion-aware Time Stretching via Selective Magnitude Spectrogram Compression by Nonstationary Gabor Transform
Natsuki Akaishi, Nicki Holighaus, Kohei Yatabe
Phase vocoder-based time-stretching is a widely used technique for the time-scale modification of audio signals. However, conventional implementations suffer from ``percussion smea…
math.OC2025
Sparse Regularization by Smooth Non-separable Non-convex Penalty Function Based on Ultra-discretization Formula
Natsuki Akaishi, Koki Yamada, Kohei Yatabe
In sparse optimization, the norm is widely adopted for its convexity, yet it often yields solutions with smaller magnitudes than expected. To mitigate this drawback, var…