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The voice mode of the Opus audio coder can compress wideband speech at bit rates ranging from 6 kb/s to 40 kb/s. However, Opus is at its core a waveform matching coder, and as the rate drops below 10 kb/s, quality degrades quickly. As the…

Audio and Speech Processing · Electrical Eng. & Systems 2020-08-11 Jan Skoglund , Jean-Marc Valin

Neural audio codecs, neural networks which compress a waveform into discrete tokens, play a crucial role in the recent development of audio generative models. State-of-the-art codecs rely on the end-to-end training of an autoencoder and a…

Sound · Computer Science 2025-03-26 Zineb Lahrichi , Gaëtan Hadjeres , Gael Richard , Geoffroy Peeters

Adversarial perturbations exploit vulnerabilities in automatic speech recognition (ASR) systems while preserving human perceived linguistic content. Neural audio codecs impose a discrete bottleneck that can suppress fine-grained signal…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-11 Jordan Prescott , Thanathai Lertpetchpun , Shrikanth Narayanan

Streaming end-to-end speech recognition models have been widely applied to mobile devices and show significant improvement in efficiency. These models are typically trained on the server using transcribed speech data. However, the server…

The long speech sequence has been troubling language models (LM) based TTS approaches in terms of modeling complexity and efficiency. This work proposes SoCodec, a semantic-ordered multi-stream speech codec, to address this issue. It…

Sound · Computer Science 2024-09-04 Haohan Guo , Fenglong Xie , Kun Xie , Dongchao Yang , Dake Guo , Xixin Wu , Helen Meng

Neural Audio Codecs (NACs) have gained growing attention in recent years as technologies for audio compression and audio representation in speech language models. While mainstream NACs typically require G-level computation and M-level…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-27 Zixiang Wan , Guochang Zhang , Yifeng He , Jianqiang Wei

In this work, we explore the possibility of decoding Imagined Speech brain waves using machine learning techniques. We propose a covariance matrix of Electroencephalogram channels as input features, projection to tangent space of covariance…

Signal Processing · Electrical Eng. & Systems 2021-05-03 Abhiram Singh , Ashwin Gumaste

Speech codecs learn compact representations of speech signals to facilitate data transmission. Many recent deep neural network (DNN) based end-to-end speech codecs achieve low bitrates and high perceptual quality at the cost of model…

Audio and Speech Processing · Electrical Eng. & Systems 2020-08-11 Kai Zhen , Jongmo Sung , Mi Suk Lee , Seungkwon Beack , Minje Kim

As one of the most popular sequence-to-sequence modeling approaches for speech recognition, the RNN-Transducer has achieved evolving performance with more and more sophisticated neural network models of growing size and increasing training…

Computation and Language · Computer Science 2023-10-20 Wei Zhou , Wilfried Michel , Ralf Schlüter , Hermann Ney

Deep biasing improves automatic speech recognition (ASR) performance by incorporating contextual phrases. However, most existing methods enhance subwords in a contextual phrase as independent units, potentially compromising contextual…

Sound · Computer Science 2025-05-30 Zhennan Lin , Kaixun Huang , Wei Ren , Linju Yang , Lei Xie

This paper studies a novel pre-training technique with unpaired speech data, Speech2C, for encoder-decoder based automatic speech recognition (ASR). Within a multi-task learning framework, we introduce two pre-training tasks for the…

Sound · Computer Science 2022-06-22 Junyi Ao , Ziqiang Zhang , Long Zhou , Shujie Liu , Haizhou Li , Tom Ko , Lirong Dai , Jinyu Li , Yao Qian , Furu Wei

Collaborative robots must effectively communicate their internal state to humans to enable a smooth interaction. Nonverbal communication is widely used to communicate information during human-robot interaction, however, such methods may…

Robotics · Computer Science 2024-05-01 Liam Roy , Dana Kulic , Elizabeth Croft

Automatic detection of synthetic speech is becoming increasingly important as current synthesis methods are both near indistinguishable from human speech and widely accessible to the public. Audio watermarking and other active disclosure…

Sound · Computer Science 2024-09-23 Lauri Juvela , Xin Wang

Neural speech codecs are essential for advancing text-to-speech (TTS) systems. With the recent success of large language models in text generation, developing high-quality speech tokenizers has become increasingly important. This paper…

Sound · Computer Science 2025-06-02 Peijie Chen , Wenhao Guan , Kaidi Wang , Weijie Wu , Hukai Huang , Qingyang Hong , Lin Li

This paper introduces a lightweight deep learning model for real-time speech enhancement, designed to operate efficiently on resource-constrained devices. The proposed model leverages a compact architecture that facilitates rapid inference…

Audio and Speech Processing · Electrical Eng. & Systems 2025-09-23 Shuubham Ojha , Felix Gervits , Carol Espy-Wilson

In recent years, the introduction of neural networks (NNs) into the field of speech enhancement has brought significant improvements. However, many of the proposed methods are quite demanding in terms of computational complexity and memory…

Audio and Speech Processing · Electrical Eng. & Systems 2024-04-19 Ernst Seidel , Pejman Mowlaee , Tim Fingscheidt

Image codecs are typically optimized to trade-off bitrate \vs distortion metrics. At low bitrates, this leads to compression artefacts which are easily perceptible, even when training with perceptual or adversarial losses. To improve image…

Computer Vision and Pattern Recognition · Computer Science 2024-03-20 Marlène Careil , Matthew J. Muckley , Jakob Verbeek , Stéphane Lathuilière

The proposed model aims to develop a speech recognition technology for hearing, speech, or cognitively disabled people. All the available technology in the field of speech recognition doesn't come with an interface for communication for…

Sound · Computer Science 2024-07-23 Ritabrata Roy Choudhury

Because of reinforcement learning's (RL) ability to automatically create more adaptive controlling logics beyond the hand-crafted heuristics, numerous effort has been made to apply RL to congestion control (CC) design for real time video…

Networking and Internet Architecture · Computer Science 2025-03-18 Zhengxu Xia , Hanchen Li , Junchen Jiang

The mission of visual brain-computer interfaces (BCIs) is to enhance information transfer rate (ITR) to reach high speed towards real-life communication. Despite notable progress, noninvasive visual BCIs have encountered a plateau in ITRs,…

Human-Computer Interaction · Computer Science 2023-08-28 Nanlin Shi , Yining Miao , Changxing Huang , Xiang Li , Yonghao Song , Xiaogang Chen , Yijun Wang , Xiaorong Gao