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Related papers: U-Codec: Ultra Low Frame-rate Neural Speech Codec …

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Large language models have revolutionized natural language processing through self-supervised pretraining on massive datasets. Inspired by this success, researchers have explored adapting these methods to speech by discretizing continuous…

Machine Learning · Computer Science 2025-10-28 Luca Della Libera , Francesco Paissan , Cem Subakan , Mirco Ravanelli

This paper presents LongCat-Audio-Codec, an audio tokenizer and detokenizer solution designed for industrial grade end-to-end speech large language models. By leveraging a decoupled model architecture and a multistage training strategy,…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-20 Xiaohan Zhao , Hongyu Xiang , Shengze Ye , Song Li , Zhengkun Tian , Guanyu Chen , Ke Ding , Guanglu Wan

Language models (LMs) have recently flourished in natural language processing and computer vision, generating high-fidelity texts or images in various tasks. In contrast, the current speech generative models are still struggling regarding…

Sound · Computer Science 2023-10-13 Xinfa Zhu , Yuanjun Lv , Yi Lei , Tao Li , Wendi He , Hongbin Zhou , Heng Lu , Lei Xie

Voice communication in bandwidth-constrained environments--maritime, satellite, and tactical networks--remains prohibitively expensive. Traditional codecs struggle below 1 kbps, while existing semantic approaches (STT-TTS) sacrifice prosody…

Sound · Computer Science 2025-12-04 Siyu Wang , Haitao Li , Donglai Zhu

Existing Large Language Model (LLM) based autoregressive (AR) text-to-speech (TTS) systems, while achieving state-of-the-art quality, still face critical challenges. The foundation of this LLM-based paradigm is the discretization of the…

Recently, neural networks have proven to be effective in performing speech coding task at low bitrates. However, under-utilization of intra-frame correlations and the error of quantizer specifically degrade the reconstructed audio quality.…

Audio and Speech Processing · Electrical Eng. & Systems 2024-02-05 Linping Xu , Jiawei Jiang , Dejun Zhang , Xianjun Xia , Li Chen , Yijian Xiao , Piao Ding , Shenyi Song , Sixing Yin , Ferdous Sohel

Neural audio codecs have recently enabled high-fidelity reconstruction at high compression rates, especially for speech. However, speech and non-speech audio exhibit fundamentally different spectral characteristics: speech energy…

Audio and Speech Processing · Electrical Eng. & Systems 2025-11-11 Haoran Wang , Jiatong Shi , Jinchuan Tian , Bohan Li , Kai Yu , Shinji Watanabe

Optimization of modern ASR architectures is among the highest priority tasks since it saves many computational resources for model training and inference. The work proposes a new Uconv-Conformer architecture based on the standard Conformer…

Audio and Speech Processing · Electrical Eng. & Systems 2023-03-14 Andrei Andrusenko , Rauf Nasretdinov , Aleksei Romanenko

The Large Language models (LLMs) have demonstrated supreme capabilities in text understanding and generation, but cannot be directly applied to cross-modal tasks without fine-tuning. This paper proposes a cross-modal in-context learning…

Sound · Computer Science 2024-06-17 Dongchao Yang , Haohan Guo , Yuanyuan Wang , Rongjie Huang , Xiang Li , Xu Tan , Xixin Wu , Helen Meng

Neural audio codecs are a fundamental component of modern generative audio pipelines. Although recent codecs achieve strong low-bitrate reconstruction and provide powerful representations for downstream tasks, most are non-streamable,…

Sound · Computer Science 2025-09-22 Luca Della Libera , Cem Subakan , Mirco Ravanelli

We consider the problem of ultra-low bit rate visual communication for remote vision analysis, human interactions and control in challenging scenarios with very low communication bandwidth, such as deep space exploration, battlefield…

Computer Vision and Pattern Recognition · Computer Science 2025-11-03 Weiming Chen , Yijia Wang , Zhihan Zhu , Zhihai He

Learned image compression methods have shown impressive performance but are often highly specialized for either human perception or specific machine vision tasks. This specialization limits their versatility and requires costly retraining…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Jinming Liu , Yuntao Wei , Junyan Lin , Shengyang Zhao , Heming Sun , Zhibo Chen , Wenjun Zeng , Xin Jin

Speech generation models based on large language models (LLMs) typically operate on discrete acoustic codes, which differ fundamentally from text tokens due to their multicodebook structure. At each timestep, models must predict N codebook…

Audio and Speech Processing · Electrical Eng. & Systems 2026-01-26 Roy Fejgin , Paarth Neekhara , Xuesong Yang , Edresson Casanova , Ryan Langman , Jaehyeon Kim , Subhankar Ghosh , Shehzeen Hussain , Jason Li

We propose an audio codec that addresses the low-delay requirements of some applications such as network music performance. The codec is based on the modified discrete cosine transform (MDCT) with very short frames and uses gain-shape…

Multimedia · Computer Science 2016-02-18 Jean-Marc Valin , Timothy B. Terriberry , Gregory Maxwell

Recently, the unified streaming and non-streaming two-pass (U2/U2++) end-to-end model for speech recognition has shown great performance in terms of streaming capability, accuracy and latency. In this paper, we present fast-U2++, an…

Efficiently representing audio signals in a compressed latent space is critical for latent generative modelling. However, existing autoencoders often force a choice between continuous embeddings and discrete tokens. Furthermore, achieving…

Sound · Computer Science 2025-09-15 Marco Pasini , Stefan Lattner , George Fazekas

Multimodal Large Language Models have demonstrated exceptional performance in UI2Code tasks, significantly enhancing website development efficiency. However, these tasks incur substantially higher computational overhead than traditional…

Software Engineering · Computer Science 2025-09-16 Jingyu Xiao , Zhongyi Zhang , Yuxuan Wan , Yintong Huo , Yang Liu , Michael R. Lyu

We propose TQCodec, a neural audio codec designed for high-bitrate, high-fidelity music streaming. Unlike existing neural codecs that primarily target ultra-low bitrates (<= 16kbps), TQCodec operates at 44.1 kHz and supports bitrates from…

The accuracy of end-to-end (E2E) automatic speech recognition (ASR) models continues to improve as they are scaled to larger sizes, with some now reaching billions of parameters. Widespread deployment and adoption of these models, however,…

In low-bitrate speech coding, end-to-end speech coding networks aim to learn compact yet expressive features and a powerful decoder in a single network. A challenging problem as such results in unwelcome complexity increase and inferior…

Audio and Speech Processing · Electrical Eng. & Systems 2023-11-16 Haici Yang , Inseon Jang , Minje Kim