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Longest common subsequence ($\mathsf{LCS}$) is a classic and central problem in combinatorial optimization. While $\mathsf{LCS}$ admits a quadratic time solution, recent evidence suggests that solving the problem may be impossible in truly…

Data Structures and Algorithms · Computer Science 2021-11-23 Aviad Rubinstein , Saeed Seddighin , Zhao Song , Xiaorui Sun

Large language models (LLMs) are being used to solve planning problems that require search. Most of the literature uses LLMs as world models to define the search space, forgoing soundness for the sake of flexibility. A recent work, Thought…

Artificial Intelligence · Computer Science 2025-05-29 Daniel Cao , Michael Katz , Harsha Kokel , Kavitha Srinivas , Shirin Sohrabi

Given two sequences $A[1..n]$ and $B[1..m]$ over a totally ordered alphabet, the \emph{Longest Common Bitonic Subsequence} (LCBS) problem asks for a longest common subsequence that is strictly increasing up to a single peak element and…

Data Structures and Algorithms · Computer Science 2026-01-15 Md. Tanzeem Rahat , Md. Manzurul Hasan

Recently, artificial intelligence-based dubbing technology has advanced, enabling automated dubbing (AD) to convert the source speech of a video into target speech in different languages. However, natural AD still faces synchronization…

Audio and Speech Processing · Electrical Eng. & Systems 2026-05-05 Changi Hong , Yoonah Song , Hwayoung Park , Chaewoon Bang , Dayeon Ku , Do Hyun Lee , Hong Kook Kim

Recently, multimodal large language models (MM-LLMs) have achieved significant success in various tasks, but their high computational costs limit widespread application. The main computational burden arises from processing concatenated text…

Computer Vision and Pattern Recognition · Computer Science 2025-02-13 Gaotong Yu , Yi Chen , Jian Xu

We propose a novel Parallel Monte Carlo tree search with Batched Simulations (PMBS) algorithm for accelerating long-horizon, episodic robotic planning tasks. Monte Carlo tree search (MCTS) is an effective heuristic search algorithm for…

Robotics · Computer Science 2022-07-15 Baichuan Huang , Abdeslam Boularias , Jingjin Yu

Test-Time Scaling (TTS) improves the reasoning performance of Large Language Models (LLMs) by allocating additional compute during inference. We conduct a structured survey of TTS methods and categorize them into sampling-based,…

Computation and Language · Computer Science 2025-06-06 Ho-Lam Chung , Teng-Yun Hsiao , Hsiao-Ying Huang , Chunerh Cho , Jian-Ren Lin , Zhang Ziwei , Yun-Nung Chen

Tree of Thoughts (ToT) enhances Large Language Model (LLM) reasoning by structuring problem-solving as a spanning tree. However, recent methods focus on search accuracy while overlooking computational efficiency. The challenges of…

Artificial Intelligence · Computer Science 2025-02-28 Yifu Ding , Wentao Jiang , Shunyu Liu , Yongcheng Jing , Jinyang Guo , Yingjie Wang , Jing Zhang , Zengmao Wang , Ziwei Liu , Bo Du , Xianglong Liu , Dacheng Tao

We introduce Matcha-TTS, a new encoder-decoder architecture for speedy TTS acoustic modelling, trained using optimal-transport conditional flow matching (OT-CFM). This yields an ODE-based decoder capable of high output quality in fewer…

Audio and Speech Processing · Electrical Eng. & Systems 2024-01-11 Shivam Mehta , Ruibo Tu , Jonas Beskow , Éva Székely , Gustav Eje Henter

The speech-to-singing (STS) voice conversion task aims to generate singing samples corresponding to speech recordings while facing a major challenge: the alignment between the target (singing) pitch contour and the source (speech) content…

Audio and Speech Processing · Electrical Eng. & Systems 2023-05-25 Ruiqi Li , Rongjie Huang , Lichao Zhang , Jinglin Liu , Zhou Zhao

Large Language Models (LLMs) are increasingly used in Spoken Language Understanding (SLU), where effective multimodal learning depends on the alignment between audio and text. Despite various fusion methods, no standard metric exists to…

Computation and Language · Computer Science 2025-07-08 Pooneh Mousavi , Yingzhi Wang , Mirco Ravanelli , Cem Subakan

Similarity search in math is to find mathematical expressions that are similar to a user's query. We conceptualized the similarity factors between mathematical expressions, and proposed an approach to math similarity search (MSS) by…

Information Retrieval · Computer Science 2015-06-01 Qun Zhang , Abdou Youssef

With the ever-increasing quantity and variety of data worldwide, the Web has become a rich repository of mathematical formulae. This necessitates the creation of robust and scalable systems for Mathematical Information Retrieval, where…

Information Retrieval · Computer Science 2015-07-23 Richard Zanibbi , Kenny Davila , Andrew Kane , Frank Tompa

Intra-sentence multilingual speech synthesis (code-switching TTS) remains a major challenge due to abrupt language shifts, varied scripts, and mismatched prosody between languages. Conventional TTS systems are typically monolingual and fail…

Sound · Computer Science 2025-10-30 Dharma Teja Donepudi

Neural Architecture Search (NAS) methods, which automatically learn entire neural model or individual neural cell architectures, have recently achieved competitive or state-of-the-art (SOTA) performance on variety of natural language…

Computation and Language · Computer Science 2020-10-12 Ansel MacLaughlin , Jwala Dhamala , Anoop Kumar , Sriram Venkatapathy , Ragav Venkatesan , Rahul Gupta

The problem of keyword spotting i.e. identifying keywords in a real-time audio stream is mainly solved by applying a neural network over successive sliding windows. Due to the difficulty of the task, baseline models are usually large,…

Machine Learning · Computer Science 2018-11-19 Tom Véniat , Olivier Schwander , Ludovic Denoyer

Measuring Sentence Textual Similarity (STS) is a classic task that can be applied to many downstream NLP applications such as text generation and retrieval. In this paper, we focus on unsupervised STS that works on various domains but only…

Computation and Language · Computer Science 2022-10-06 Zihao Wang , Jiaheng Dou , Yong Zhang

In this work, we address the Text-to-Speech (TTS) task by proposing a non-autoregressive architecture called EfficientTTS. Unlike the dominant non-autoregressive TTS models, which are trained with the need of external aligners, EfficientTTS…

Audio and Speech Processing · Electrical Eng. & Systems 2020-12-08 Chenfeng Miao , Shuang Liang , Zhencheng Liu , Minchuan Chen , Jun Ma , Shaojun Wang , Jing Xiao

Multivariate adaptive regression splines (MARS) is a flexible statistical modeling method that has been popular for data mining applications. MARS has also been employed to approxmiate unknown relationships in optimzation for complex…

Optimization and Control · Mathematics 2020-06-30 Xinglong Ju , Jay M. Rosenberger , Victoria C. P. Chen , Feng Liu

3D face alignment is a very challenging and fundamental problem in computer vision. Existing deep learning-based methods manually design different networks to regress either parameters of a 3D face model or 3D positions of face vertices.…

Computer Vision and Pattern Recognition · Computer Science 2024-06-13 Zhichao Jiang , Hongsong Wang , Xi Teng , Baopu Li