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Text and faces are among the most perceptually salient and practically important patterns in visual generation, yet they remain challenging for autoregressive generators built on discrete tokenization. A central bottleneck is the tokenizer:…

Computer Vision and Pattern Recognition · Computer Science 2026-05-15 Yang Yue , Fangyun Wei , Tianyu He , Jinjing Zhao , Zanlin Ni , Zeyu Liu , Jiayi Guo , Lei Shi , Yue Dong , Li Chen , Ji Li , Gao Huang , Dong Chen

Discretized representations of speech signals are efficient alternatives to continuous features for various speech applications, including automatic speech recognition (ASR) and speech language models. However, these representations, such…

Sound · Computer Science 2026-02-05 Takanori Ashihara , Shota Horiguchi , Kohei Matsuura , Tsubasa Ochiai , Marc Delcroix

The massive growth of self-supervised learning (SSL) has been witnessed in language, vision, speech, and audio domains over the past few years. While discrete label prediction is widely adopted for other modalities, the state-of-the-art…

Audio and Speech Processing · Electrical Eng. & Systems 2022-12-20 Sanyuan Chen , Yu Wu , Chengyi Wang , Shujie Liu , Daniel Tompkins , Zhuo Chen , Furu Wei

Speech codecs serve as bridges between speech signals and large language models. An ideal codec for speech language models should not only preserve acoustic information but also capture rich semantic information. However, existing speech…

Speech tokenization is the task of representing speech signals as a sequence of discrete units. Such representations can be later used for various downstream tasks including automatic speech recognition, text-to-speech, etc. More relevant…

Sound · Computer Science 2024-06-18 Shoval Messica , Yossi Adi

Neural audio codecs, leveraging quantization algorithms, have significantly impacted various speech/audio tasks. While high-fidelity reconstruction is paramount for human perception, audio coding for machines (ACoM) prioritizes efficient…

Sound · Computer Science 2025-08-06 Anastasia Kuznetsova , Inseon Jang , Wootaek Lim , Minje Kim

We study two foundational problems in audio language models: (1) how to design an audio tokenizer that can serve as an intermediate representation for both understanding and generation; and (2) how to build an audio foundation model that…

Sound · Computer Science 2026-02-12 Dongchao Yang , Yuanyuan Wang , Dading Chong , Songxiang Liu , Xixin Wu , Helen Meng

We introduce DiffuseST, a low-latency, direct speech-to-speech translation system capable of preserving the input speaker's voice zero-shot while translating from multiple source languages into English. We experiment with the synthesizer…

We introduce Representation Tokenizer (RepTok), a generative modeling framework that represents an image using a single continuous latent token obtained from self-supervised vision transformers. Building on a pre-trained SSL encoder, we…

Computer Vision and Pattern Recognition · Computer Science 2026-04-22 Ming Gui , Johannes Schusterbauer , Timy Phan , Felix Krause , Josh Susskind , Miguel Angel Bautista , Björn Ommer

Building a unified visual tokenizer is essential for bridging the gap between visual understanding and generation. Yet existing approaches struggle with the inherent conflict between these tasks, as a single token space is forced to support…

Computer Vision and Pattern Recognition · Computer Science 2026-05-19 Yiwei Guo , Shaobin Zhuang , Zhipeng Huang , Canmiao Fu , Chen Li , Jing Lyu , Yali Wang

In recent years, image generation has shown a great leap in performance, where diffusion models play a central role. Although generating high-quality images, such models are mainly conditioned on textual descriptions. This begs the…

Sound · Computer Science 2023-05-23 Guy Yariv , Itai Gat , Lior Wolf , Yossi Adi , Idan Schwartz

Visual tokenizers play a crucial role in diffusion models. The dimensionality of latent space governs both reconstruction fidelity and the semantic expressiveness of the latent feature. However, a fundamental trade-off is inherent between…

Computer Vision and Pattern Recognition · Computer Science 2025-12-18 Qingyu Shi , Size Wu , Jinbin Bai , Kaidong Yu , Yujing Wang , Yunhai Tong , Xiangtai Li , Xuelong Li

Scaling spoken language modeling requires speech tokens that are both efficient and universal. Recent work has proposed syllables as promising speech tokens at low temporal resolution, but existing models are constrained to English and fail…

Audio and Speech Processing · Electrical Eng. & Systems 2026-02-02 Cheol Jun Cho , Nicholas Lee , Alan W Black , Gopala K. Anumanchipalli

Current large speech language models are mainly based on semantic tokens from discretization of self-supervised learned representations and acoustic tokens from a neural codec, following a semantic-modeling and acoustic-synthesis paradigm.…

Sound · Computer Science 2025-10-16 Xue Jiang , Xiulian Peng , Yuan Zhang , Yan Lu

The fusion of speech and language in the era of large language models has garnered significant attention. Discrete speech token is often utilized in text-to-speech tasks for speech compression and portability, which is convenient for joint…

Sound · Computer Science 2025-04-01 Yixing Li , Ruobing Xie , Xingwu Sun , Yu Cheng , Zhanhui Kang

Speech 'in-the-wild' is a handicap for speaker recognition systems due to the variability induced by real-life conditions, such as environmental noise and the emotional state of the speaker. Taking advantage of the principles of…

Audio and Speech Processing · Electrical Eng. & Systems 2022-05-17 Esther Rituerto-González , Carmen Peláez-Moreno

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

Prior motion generation largely follows two paradigms: continuous diffusion models that excel at kinematic control, and discrete token-based generators that are effective for semantic conditioning. To combine their strengths, we propose a…

Computer Vision and Pattern Recognition · Computer Science 2026-03-20 Chenyang Gu , Mingyuan Zhang , Haozhe Xie , Zhongang Cai , Lei Yang , Ziwei Liu

Discrete audio representations are gaining traction in speech modeling due to their interpretability and compatibility with large language models, but are not always optimized for noisy or real-world environments. Building on existing works…

Computation and Language · Computer Science 2025-10-30 Shreyas Gopal , Ashutosh Anshul , Haoyang Li , Yue Heng Yeo , Hexin Liu , Eng Siong Chng

Neural Speech Codecs face a fundamental trade-off at low bitrates: preserving acoustic fidelity often compromises semantic richness. To address this, we introduce SACodec, a novel codec built upon an asymmetric dual-quantizer that employs…

Sound · Computer Science 2025-12-25 Zhongren Dong , Bin Wang , Jing Han , Haotian Guo , Xiaojun Mo , Yimin Cao , Zixing Zhang