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Lattice reduction algorithms, such as the LLL algorithm, have been proposed as preprocessing tools in order to enhance the performance of suboptimal receivers in MIMO communications. In this paper we introduce a new kind of lattice…

Information Theory · Computer Science 2010-01-12 Laura Luzzi , Ghaya Rekaya-Ben Othman , Jean-Claude Belfiore

Recent breakthroughs in zero-shot voice synthesis have enabled imitating a speaker's voice using just a few seconds of recording while maintaining a high level of realism. Alongside its potential benefits, this powerful technology…

Sound · Computer Science 2024-01-09 Guangyu Chen , Yu Wu , Shujie Liu , Tao Liu , Xiaoyong Du , Furu Wei

Short-utterance speaker verification remains challenging due to limited speaker-discriminative cues in short speech segments. While existing methods focus on enhancing speaker encoders, the embedding learning strategy still forces a single…

Audio and Speech Processing · Electrical Eng. & Systems 2026-01-21 Youngmoon Jung , Joon-Young Yang , Ju-ho Kim , Jaeyoung Roh , Chang Woo Han , Hoon-Young Cho

We find that the EPE evaluation metrics of RAFT-stereo converge inconsistently in the low and high frequency regions, resulting high frequency degradation (e.g., edges and thin objects) during the iterative process. The underlying reason…

Computer Vision and Pattern Recognition · Computer Science 2025-05-26 Xiaobao Wei , Jiawei Liu , Dongbo Yang , Junda Cheng , Changyong Shu , Wei Wang

Modeling the speaker variability is a key challenge for automatic speech recognition (ASR) systems. In this paper, the learning hidden unit contributions (LHUC) based adaptation techniques with compact speaker dependent (SD) parameters are…

Audio and Speech Processing · Electrical Eng. & Systems 2023-01-09 Xurong Xie , Xunying Liu , Hui Chen , Hongan Wang

Radio map estimation (RME), also known as spectrum cartography, aims to reconstruct the strength of radio interference across different domains (e.g., space and frequency) from sparsely sampled measurements. To tackle this typical inverse…

Signal Processing · Electrical Eng. & Systems 2025-06-27 Le Xu , Lei Cheng , Junting Chen , Wenqiang Pu , Xiao Fu

In this work, we propose lattice-free MMI (LFMMI) for supervised adaptation of self-supervised pretrained acoustic model. We pretrain a Transformer model on thousand hours of untranscribed Librispeech data followed by supervised adaptation…

Machine Learning · Computer Science 2021-04-07 Apoorv Vyas , Srikanth Madikeri , Hervé Bourlard

Underwater visual localization remains challenging due to wavelength-dependent attenuation, poor texture, and non-Gaussian sensor noise. We introduce MARVO, a physics-aware, learning-integrated odometry framework that fuses underwater image…

Robotics · Computer Science 2025-12-01 Sacchin Sundar , Atman Kikani , Aaliya Alam , Sumukh Shrote , A. Nayeemulla Khan , A. Shahina

Transmit beamforming for underwater acoustic communication is challenging because it requires perfect knowledge of the channel to the receiver in advance. In practice, channel estimates must be learned through feedback and are often noisy…

Signal Processing · Electrical Eng. & Systems 2026-05-15 Diego A. Cuji , Andrew C. Singer , Milica Stojanovic

As deep learning advances in audio generation, challenges in audio security and copyright protection highlight the need for robust audio watermarking. Recent neural network-based methods have made progress but still face three main issues:…

Sound · Computer Science 2025-06-09 Yaoxun Xu , Jianwei Yu , Hangting Chen , Zhiyong Wu , Xixin Wu , Dong Yu , Rongzhi Gu , Yi Luo

Text watermarking has emerged as a pivotal technique for identifying machine-generated text. However, existing methods often rely on arbitrary vocabulary partitioning during decoding to embed watermarks, which compromises the availability…

Computation and Language · Computer Science 2024-06-07 Liang Chen , Yatao Bian , Yang Deng , Deng Cai , Shuaiyi Li , Peilin Zhao , Kam-fai Wong

This paper proposes an oblivious watermarking algorithm with blind detection approach for high volume data hiding in image signals. We present a detection reliable signal adaptive embedding scheme for multiple messages in selective…

Cryptography and Security · Computer Science 2012-07-12 T. S. Das , V. H. Mankar , S. K. Sarkar

Dense vector retrieval is the practical backbone of Retrieval- Augmented Generation (RAG), but similarity search can suffer from precision limitations. Conversely, utility-based approaches leveraging LLM re-ranking often achieve superior…

Information Retrieval · Computer Science 2026-04-27 Rajinder Sandhu , Di Mu , Cheng Chang , Md Shahriar Tasjid , Himanshu Rai , Maksims Volkovs , Ga Wu

Masked Language Models (MLMs) have proven to be effective for second-pass rescoring in Automatic Speech Recognition (ASR) systems. In this work, we propose Masked Audio Text Encoder (MATE), a multi-modal masked language model rescorer which…

Sound · Computer Science 2023-05-26 Jinglun Cai , Monica Sunkara , Xilai Li , Anshu Bhatia , Xiao Pan , Sravan Bodapati

This paper proposes a novel Bayesian reciprocity calibration method that consistently ensures uplink and downlink channel reciprocity in repeater-assisted multiple-input multiple-output (MIMO) systems. The proposed algorithm is formulated…

Signal Processing · Electrical Eng. & Systems 2026-02-06 Shoma Hara , Takumi Takahashi , Hiroki Iimori , Hideki Ochiai , Erik G. Larsson

We study Bayesian inverse problems with mixed noise, modeled as a combination of additive and multiplicative Gaussian components. While traditional inference methods often assume fixed or known noise characteristics, real-world…

Machine Learning · Computer Science 2025-10-17 Paul Hagemann , Robert Gruhlke , Bernhard Stankewitz , Claudia Schillings , Gabriele Steidl

In this paper, a new reversible image authentication technique with tamper localization based on watermarking in integer wavelet transform is proposed. If the image authenticity is verified, then the distortion due to embedding the…

Cryptography and Security · Computer Science 2009-12-04 P. Meenakshi Devi , M. Venkatesan , K. Duraiswamy

The Radiative Transfer Equation (RTE) is essential for solving the spatial distribution of light energy. It plays a crucial role in the link budget analysis of Underwater Wireless Optical Communication (UWOC). However, due to its complex…

Atmospheric and Oceanic Physics · Physics 2025-01-23 YunLong Li , Xiang Yi , ZhuoQi Chen , Peng Yue

In this paper, we propose a new detection technique for multiuser multiple-input multiple-output (MU-MIMO) systems. The proposed scheme combines a lattice reduction (LR) transformation, which makes the channel matrix nearly orthogonal, and…

Information Theory · Computer Science 2014-12-09 L. Arevalo , R. C. de Lamare , R. Sampaio-Neto

Recent multi-bit watermarking methods for large language models (LLMs) prioritize capacity over reliability, often conflating decoding with detection. Our analysis reveals that existing ECC-based extractors suffer from catastrophic false…

Cryptography and Security · Computer Science 2026-05-04 Joeun Kim , HoEun Kim , Dongsup Jin , Young-Sik Kim