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Single-step retrieval-augmented generation (RAG) provides an efficient way to incorporate external information for simple question answering tasks but struggles with complex questions. Agentic RAG extends this paradigm by replacing…

Computation and Language · Computer Science 2026-05-08 Yijia Zheng , Marcel Worring

Real-time voice agents face a dilemma: end-to-end models often lack deep reasoning, while cascaded pipelines incur high latency by executing ASR, LLM reasoning, and TTS strictly in sequence, unlike human conversation where listeners often…

Sound · Computer Science 2026-01-29 Wenhao Zou , Yuwei Miao , Zhanyu Ma , Jun Xu , Jiuchong Gao , Jinghua Hao , Renqing He , Jingwen Xu

Retrieval-Augmented Generation (RAG) utilizes external knowledge to augment Large Language Models' (LLMs) reliability. For flexibility, agentic RAG employs autonomous, multi-round retrieval and reasoning to resolve queries. Although recent…

Information Retrieval · Computer Science 2025-11-10 Chao Zhang , Yuhao Wang , Derong Xu , Haoxin Zhang , Yuanjie Lyu , Yuhao Chen , Shuochen Liu , Tong Xu , Xiangyu Zhao , Yan Gao , Yao Hu , Enhong Chen

There has recently been growing interest in conversational agents with long-term memory which has led to the rapid development of language models that use retrieval-augmented generation (RAG). Until recently, most work on RAG has focused on…

Computation and Language · Computer Science 2024-06-06 Nick Alonso , Tomás Figliolia , Anthony Ndirango , Beren Millidge

End-to-end speech-in speech-out dialogue systems are emerging as a powerful alternative to traditional ASR-LLM-TTS pipelines, generating more natural, expressive responses with significantly lower latency. However, these systems remain…

We present an architecture for voice trigger detection for virtual assistants. The main idea in this work is to exploit information in words that immediately follow the trigger phrase. We first demonstrate that by including more audio…

Audio and Speech Processing · Electrical Eng. & Systems 2021-03-03 Siddharth Sigtia , John Bridle , Hywel Richards , Pascal Clark , Erik Marchi , Vineet Garg

Complex dialog systems often use retrieved evidence to facilitate factual responses. Such RAG (Retrieval Augmented Generation) systems retrieve from massive heterogeneous data stores that are usually architected as multiple indexes or APIs…

Information Retrieval · Computer Science 2024-08-01 Ashutosh Joshi , Sheikh Muhammad Sarwar , Samarth Varshney , Sreyashi Nag , Shrivats Agrawal , Juhi Naik

Large language models have enabled agents of all kinds to interact with users through natural conversation. Consequently, agents now have two jobs: conversing and planning/reasoning. Their conversational responses must be informed by all…

Artificial Intelligence · Computer Science 2024-10-14 Konstantina Christakopoulou , Shibl Mourad , Maja Matarić

This technical report details a novel approach to combining reasoning and retrieval augmented generation (RAG) within a single, lean language model architecture. While existing RAG systems typically rely on large-scale models and external…

Large language models (LLMs) are proven to benefit a lot from retrieval-augmented generation (RAG) in alleviating hallucinations confronted with knowledge-intensive questions. RAG adopts information retrieval techniques to inject external…

Computation and Language · Computer Science 2024-10-10 Junda Zhu , Lingyong Yan , Haibo Shi , Dawei Yin , Lei Sha

Retrieval-augmented generation (RAG) extends large language models (LLMs) with external data sources to enhance factual correctness and domain coverage. Modern RAG pipelines rely on large datastores, creating a significant system challenge:…

Distributed, Parallel, and Cluster Computing · Computer Science 2026-05-19 Chien-Yu Lin , Keisuke Kamahori , Yiyu Liu , Xiaoxiang Shi , Madhav Kashyap , Yile Gu , Rulin Shao , Zihao Ye , Kan Zhu , Rohan Kadekodi , Stephanie Wang , Arvind Krishnamurthy , Luis Ceze , Baris Kasikci

Streaming Automatic Speech Recognition (ASR) in voice assistants can utilize prefetching to partially hide the latency of response generation. Prefetching involves passing a preliminary ASR hypothesis to downstream systems in order to…

Computation and Language · Computer Science 2023-05-24 Andreas Schwarz , Di He , Maarten Van Segbroeck , Mohammed Hethnawi , Ariya Rastrow

Speech-to-speech models handle turn-taking naturally but offer limited support for tool-calling or complex reasoning, while production ASR-LLM-TTS voice pipelines offer these capabilities but rely on silence timeouts, which lead to…

Audio and Speech Processing · Electrical Eng. & Systems 2026-03-10 Shangeth Rajaa

Retrieval-Augmented Generation (RAG) enables large language models (LLMs) to access external knowledge sources, but the effectiveness of RAG relies on the coordination between the retriever and the generator. Since these components are…

Computation and Language · Computer Science 2025-09-24 Junlin Wang , Zehao Wu , Shaowei Lu , Yanlan Li , Xinghao Huang

Retrieval-Augmented Generation (RAG) has emerged as the predominant paradigm for grounding Large Language Model outputs in factual knowledge, effectively mitigating hallucinations. However, conventional RAG systems operate under a…

Information Retrieval · Computer Science 2026-01-13 Sergii Voloshyn

We introduce VoxRAG, a modular speech-to-speech retrieval-augmented generation system that bypasses transcription to retrieve semantically relevant audio segments directly from spoken queries. VoxRAG employs silence-aware segmentation,…

Information Retrieval · Computer Science 2025-08-08 Zackary Rackauckas , Julia Hirschberg

Effective human-AI collaboration on complex reasoning tasks requires that users understand and interact with the model's process, not just receive an output. However, the monolithic text from methods like Chain-of-Thought (CoT) prevents…

Audio and Speech Processing · Electrical Eng. & Systems 2025-10-21 Yueqian Lin , Zhengmian Hu , Jayakumar Subramanian , Qinsi Wang , Nikos Vlassis , Hai "Helen" Li , Yiran Chen

Developers spend much time finding information that is relevant to their questions. Stack Overflow has been the leading resource, and with the advent of Large Language Models (LLMs), generative models such as ChatGPT are used frequently.…

Artificial Intelligence · Computer Science 2024-06-21 Davit Abrahamyan , Fatemeh H. Fard

Retrieval-Augmented Generation (RAG) improves factual grounding in large language models but suffers from substantial latency due to synchronous retrieval. While recent work explores asynchronous retrieval, existing approaches rely on…

Computation and Language · Computer Science 2026-05-19 Wuyang Zhang , Shichao Pei

Recent advances in Large Language Model (LLM)-based agents have been propelled by Retrieval-Augmented Generation (RAG), which grants the models access to vast external knowledge bases. Despite RAG's success in improving agent performance,…

Computation and Language · Computer Science 2025-11-06 Shuhang Lin , Zhencan Peng , Lingyao Li , Xiao Lin , Xi Zhu , Yongfeng Zhang
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