EfficientLEAF: A Faster LEarnable Audio Frontend of Questionable Use
Abstract
In audio classification, differentiable auditory filterbanks with few parameters cover the middle ground between hard-coded spectrograms and raw audio. LEAF (arXiv:2101.08596), a Gabor-based filterbank combined with Per-Channel Energy Normalization (PCEN), has shown promising results, but is computationally expensive. With inhomogeneous convolution kernel sizes and strides, and by replacing PCEN with better parallelizable operations, we can reach similar results more efficiently. In experiments on six audio classification tasks, our frontend matches the accuracy of LEAF at 3% of the cost, but both fail to consistently outperform a fixed mel filterbank. The quest for learnable audio frontends is not solved.
Keywords
Cite
@article{arxiv.2207.05508,
title = {EfficientLEAF: A Faster LEarnable Audio Frontend of Questionable Use},
author = {Jan Schlüter and Gerald Gutenbrunner},
journal= {arXiv preprint arXiv:2207.05508},
year = {2022}
}
Comments
Accepted at EUSIPCO 2022. Code at https://github.com/CPJKU/EfficientLEAF