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This paper introduces DeCAL, a new method for tokenwise compression. DeCAL uses an encoder-decoder language model pretrained with denoising to learn to produce high-quality, general-purpose compressed representations from the encoder. DeCAL…

Computation and Language · Computer Science 2025-10-23 Sameer Panwar

We introduce Diffusion-based Audio Captioning (DAC), a non-autoregressive diffusion model tailored for diverse and efficient audio captioning. Although existing captioning models relying on language backbones have achieved remarkable…

Computation and Language · Computer Science 2025-06-03 Manjie Xu , Chenxing Li , Xinyi Tu , Yong Ren , Ruibo Fu , Wei Liang , Dong Yu

We present GRAFX, an open-source library designed for handling audio processing graphs in PyTorch. Along with various library functionalities, we describe technical details on the efficient parallel computation of input graphs, signals, and…

We propose Hierarchical Audio Codec (HAC), a unified neural speech codec that factorizes its bottleneck into three linguistic levels-acoustic, phonetic, and lexical-within a single model. HAC leverages two knowledge distillation objectives:…

State-of-the-art audio captioning methods typically use the encoder-decoder structure with pretrained audio neural networks (PANNs) as encoders for feature extraction. However, the convolution operation used in PANNs is limited in capturing…

Sound · Computer Science 2023-04-11 Feiyang Xiao , Jian Guan , Qiaoxi Zhu , Wenwu Wang

We present VCNAC, a variable channel neural audio codec. Our approach features a single encoder and decoder parametrization that enables native inference for different channel setups, from mono speech to cinematic 5.1 channel surround…

The emergence of audio language models is empowered by neural audio codecs, which establish critical mappings between continuous waveforms and discrete tokens compatible with language model paradigms. The evolutionary trends from…

Audio and Speech Processing · Electrical Eng. & Systems 2025-02-28 Yidi Jiang , Qian Chen , Shengpeng Ji , Yu Xi , Wen Wang , Chong Zhang , Xianghu Yue , ShiLiang Zhang , Haizhou Li

Large language models (LLMs) have significantly advanced audio processing through audio codecs that convert audio into discrete tokens, enabling the application of language modelling techniques to audio data. However, traditional codecs…

Sound · Computer Science 2024-12-02 Haohe Liu , Xuenan Xu , Yi Yuan , Mengyue Wu , Wenwu Wang , Mark D. Plumbley

We introduce Gull, a generative multifunctional audio codec. Gull is a general purpose neural audio compression and decompression model which can be applied to a wide range of tasks and applications such as real-time communication, audio…

Audio and Speech Processing · Electrical Eng. & Systems 2024-06-10 Yi Luo , Jianwei Yu , Hangting Chen , Rongzhi Gu , Chao Weng

The number of bandwidth-hungry applications and services is constantly growing. HTTP adaptive streaming of audio-visual content accounts for the majority of today's internet traffic. Although the internet bandwidth increases also…

Multimedia · Computer Science 2018-03-20 Anatoliy Zabrovskiy , Christian Feldmann , Christian Timmerer

Understanding shock-solid interactions remains a central challenge in compressiblefluiddynamics. WepresentJAX-Shock: afully-differentiable,GPU-accelerated, high-order shock-capturing solver for efficient simulation of the compressible…

Fluid Dynamics · Physics 2026-01-09 Bo Zhang

Existing Audio Deepfake Detection (ADD) systems often struggle to generalise effectively due to the significantly degraded audio quality caused by audio codec compression and channel transmission effects in real-world communication…

Audio and Speech Processing · Electrical Eng. & Systems 2026-05-12 Haohan Shi , Xiyu Shi , Safak Dogan , Saif Alzubi , Tianjin Huang , Yunxiao Zhang

Recent advancements in audio generation have been significantly propelled by the capabilities of Large Language Models (LLMs). The existing research on audio LLM has primarily focused on enhancing the architecture and scale of audio…

Audio and Speech Processing · Electrical Eng. & Systems 2024-11-28 Zhen Ye , Peiwen Sun , Jiahe Lei , Hongzhan Lin , Xu Tan , Zheqi Dai , Qiuqiang Kong , Jianyi Chen , Jiahao Pan , Qifeng Liu , Yike Guo , Wei Xue

Real-time streaming joint audio-video generation for character animation requires a generator to speak the requested transcript, maintain visual identity across chunks, and run within a strict playback budget. These requirements are…

Computer Vision and Pattern Recognition · Computer Science 2026-05-26 Linrui Tian , Qi Wang , Bang Zhang

The open-source CARFAC (Cascade of Asymmetric Resonators with Fast-Acting Compression) cochlear model is upgraded to version 2, with improvements to the Matlab implementation, and with new Python/NumPy and JAX implementations -- but C++…

Audio and Speech Processing · Electrical Eng. & Systems 2024-04-29 Richard F. Lyon , Rob Schonberger , Malcolm Slaney , Mihajlo Velimirović , Honglin Yu

This paper introduces a novel neural audio codec targeting high waveform sampling rates and low bitrates named APCodec, which seamlessly integrates the strengths of parametric codecs and waveform codecs. The APCodec revolutionizes the…

Sound · Computer Science 2024-09-25 Yang Ai , Xiao-Hang Jiang , Ye-Xin Lu , Hui-Peng Du , Zhen-Hua Ling

In our effort to facilitate machine learning-assisted computational fluid dynamics (CFD), we introduce the second iteration of JAX-Fluids. JAX-Fluids is a Python-based fully-differentiable CFD solver designed for compressible single- and…

Fluid Dynamics · Physics 2024-02-09 Deniz A. Bezgin , Aaron B. Buhendwa , Nikolaus A. Adams

On-device speech recognition requires training models of different sizes for deploying on devices with various computational budgets. When building such different models, we can benefit from training them jointly to take advantage of the…

Computation and Language · Computer Science 2021-07-15 Varun Nagaraja , Yangyang Shi , Ganesh Venkatesh , Ozlem Kalinli , Michael L. Seltzer , Vikas Chandra

Audio and speech coding lack unified evaluation and open-source testing. Many candidate systems were evaluated on proprietary, non-reproducible, or small data, and machine learning-based codecs are often tested on datasets with similar…

Audio and Speech Processing · Electrical Eng. & Systems 2025-08-04 Jozef Coldenhoff , Niclas Granqvist , Milos Cernak

Neural audio codecs (NACs), which use neural networks to generate compact audio representations, have garnered interest for their applicability to many downstream tasks -- especially quantized codecs due to their compatibility with large…

Audio and Speech Processing · Electrical Eng. & Systems 2025-08-13 Ryo Aihara , Yoshiki Masuyama , Gordon Wichern , François G. Germain , Jonathan Le Roux