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Speculative decoding accelerates autoregressive speech generation by letting a fast draft model propose tokens that a larger target model verifies. However, for speech LLMs that generate acoustic tokens, exact token matching is overly…

音频与语音处理 · 电气工程与系统科学 2026-01-23 Moran Yanuka , Paul Dixon , Eyal Finkelshtein , Daniel Rotman , Raja Giryes

Speculative generation has emerged as a promising technique to accelerate inference in large language models (LLMs) by leveraging parallelism to verify multiple draft tokens simultaneously. However, the fundamental limits on the achievable…

计算与语言 · 计算机科学 2025-12-15 Sergey Pankratov , Dan Alistarh

Speculative Decoding is a widely used technique to speed up inference for Large Language Models (LLMs) without sacrificing quality. When performing inference, speculative decoding uses a smaller draft model to generate speculative tokens…

机器学习 · 计算机科学 2025-02-06 Minghao Yan , Saurabh Agarwal , Shivaram Venkataraman

The auto-regressive architecture, like GPTs, is widely used in modern Text-to-Speech (TTS) systems. However, it incurs substantial inference time, particularly due to the challenges in the next-token prediction posed by lengthy sequences of…

音频与语音处理 · 电气工程与系统科学 2025-02-11 Bohan Li , Hankun Wang , Situo Zhang , Yiwei Guo , Kai Yu

Speculative decoding (SD) has emerged as an effective technique to accelerate large language model (LLM) inference without compromising output quality. However, the achievable speedup largely depends on the effectiveness of the drafting…

计算与语言 · 计算机科学 2025-11-04 Min Fang , Zhihui Fu , Qibin Zhao , Jun Wang

Sampling is a common strategy for generating text from probabilistic models, yet standard ancestral sampling often results in text that is incoherent or ungrammatical. To alleviate this issue, various modifications to a model's sampling…

计算与语言 · 计算机科学 2024-01-08 Clara Meister , Tiago Pimentel , Luca Malagutti , Ethan G. Wilcox , Ryan Cotterell

Large Language Model (LLM) collaborative decoding techniques improve output quality by combining the outputs of multiple models at each generation step, but they incur high computational costs. In this paper, we introduce Collaborative…

计算与语言 · 计算机科学 2025-05-30 Jiale Fu , Yuchu Jiang , Junkai Chen , Jiaming Fan , Xin Geng , Xu Yang

Speculative decoding (SD) has been demonstrated as an effective technique for lossless LLM inference acceleration. Retrieval-based SD methods, one kind of model-free method, have yielded promising speedup, but they often rely on incomplete…

计算与语言 · 计算机科学 2024-12-17 Yuxuan Hu , Ke Wang , Xiaokang Zhang , Fanjin Zhang , Cuiping Li , Hong Chen , Jing Zhang

Speculative decoding (SD) accelerates language model inference by drafting tokens from a cheap proposal model and verifying them against an expensive target model via rejection sampling. Because rejection truncates the draft block at the…

The practice of speculative decoding, whereby inference is probabilistically supported by a smaller, cheaper, ``drafter'' model, has become a standard technique for systematically reducing the decoding time of large language models. This…

计算与语言 · 计算机科学 2025-10-03 Jameson Sandler , Ahmet Üstün , Marco Romanelli , Sara Hooker , Ferdinando Fioretto

Speculative Decoding (SD) accelerates autoregressive large language model (LLM) inference by decoupling generation and verification. While recent methods improve draft quality by tightly coupling the drafter with the target model, the…

机器学习 · 计算机科学 2026-04-14 Jingwei Song , Xinyu Wang , Hanbin Wang , Xiaoxuan Lei , Bill Shi , Shixin Han , Eric Yang , Xiao-Wen Chang , Lynn Ai

Speculative decoding (SD) accelerates large language model inference by allowing a lightweight draft model to propose outputs that a stronger target model verifies. However, its token-centric nature allows erroneous steps to propagate.…

计算与语言 · 计算机科学 2026-04-17 Kiran Purohit , Ramasuri Narayanam , Soumyabrata Pal

Large Language Models (LLMs) have become an indispensable part of natural language processing tasks. However, autoregressive sampling has become an efficiency bottleneck. Multi-Draft Speculative Decoding (MDSD) is a recent approach where,…

计算与语言 · 计算机科学 2025-02-27 Zhengmian Hu , Tong Zheng , Vignesh Viswanathan , Ziyi Chen , Ryan A. Rossi , Yihan Wu , Dinesh Manocha , Heng Huang

Speculative decoding reduces the inference latency of a target large language model via utilizing a smaller and faster draft model. Its performance depends on a hyperparameter K -- the candidate length, i.e., the number of candidate tokens…

计算与语言 · 计算机科学 2025-07-14 Kaixuan Huang , Xudong Guo , Mengdi Wang

Speculative decoding accelerates large language model (LLM) inference by using a lightweight draft model to propose tokens that are later verified by a stronger target model. While effective in centralized systems, its behavior in…

分布式、并行与集群计算 · 计算机科学 2025-11-18 Jingwei Song , Wanyi Chen , Xinyuan Song , Max , Chris Tong , Gufeng Chen , Tianyi Zhao , Eric Yang , Bill Shi , Lynn Ai

Speculative decoding accelerates language model inference by separating generation into fast drafting and parallel verification. Its main limitation is drafter-verifier misalignment, which limits token acceptance and reduces overall…

机器学习 · 计算机科学 2025-11-14 Frédéric Berdoz , Peer Rheinboldt , Roger Wattenhofer

Speculative decoding accelerates Large Language Models via draft-then-verify, where verification can be framed as an Optimal Transport (OT) problem. Existing approaches typically handle multi-draft and multi-step aspects in isolation,…

计算与语言 · 计算机科学 2026-05-07 Yepeng Weng , Qiao Hu , Takehisa Yairi

Transformer-based autoregressive sampling has been the major bottleneck for slowing down large language model inferences. One effective way to accelerate inference is \emph{Speculative Decoding}, which employs a small model to sample a…

机器学习 · 计算机科学 2024-11-05 Ming Yin , Minshuo Chen , Kaixuan Huang , Mengdi Wang

Speculative decoding has been widely used to accelerate auto-regressive (AR) text generation. However, its effectiveness for visual AR models remains limited due to token selection ambiguity, where multiple tokens share similarly low…

计算机视觉与模式识别 · 计算机科学 2025-03-28 Sihwan Park , Doohyuk Jang , Sungyub Kim , Souvik Kundu , Eunho Yang

Slice sampling is a well-established Markov chain Monte Carlo method for (approximate) sampling of target distributions which are only known up to a normalizing constant. The method is based on choosing a new state on a slice, i.e., a…

统计计算 · 统计学 2025-12-22 Kevin Bitterlich , Daniel Rudolf , Björn Sprungk