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Parameter quantization for Large Language Models (LLMs) has attracted increasing attentions recently in reducing memory costs and improving computational efficiency. Early approaches have been widely adopted. However, the existing methods…

机器学习 · 计算机科学 2024-06-04 Haoyu Wang , Bei Liu , Hang Shao , Bo Xiao , Ke Zeng , Guanglu Wan , Yanmin Qian

This paper provides a comprehensive overview of the principles, challenges, and methodologies associated with quantizing large-scale neural network models. As neural networks have evolved towards larger and more complex architectures to…

机器学习 · 计算机科学 2024-09-19 Yanshu Wang , Tong Yang , Xiyan Liang , Guoan Wang , Hanning Lu , Xu Zhe , Yaoming Li , Li Weitao

Recent end-to-end automatic speech recognition (ASR) models have become increasingly larger, making them particularly challenging to be deployed on resource-constrained devices. Model quantisation is an effective solution that sometimes…

声音 · 计算机科学 2023-09-19 Qiuming Zhao , Guangzhi Sun , Chao Zhang , Mingxing Xu , Thomas Fang Zheng

Vision transformer emerges as a potential architecture for vision tasks. However, the intense computation and non-negligible delay hinder its application in the real world. As a widespread model compression technique, existing post-training…

计算机视觉与模式识别 · 计算机科学 2023-03-28 Yifu Ding , Haotong Qin , Qinghua Yan , Zhenhua Chai , Junjie Liu , Xiaolin Wei , Xianglong Liu

Rotations have become essential to state-of-the-art quantization pipelines for large language models (LLMs) by effectively smoothing outliers in weights and activations. However, further optimizing the rotation parameters offers only…

机器学习 · 计算机科学 2025-09-01 Liulu He , Shenli Zheng , Karwei Sun , Yijiang Liu , Yufei Zhao , Chongkang Tan , Huanrui Yang , Yuan Du , Li Du

Large Language Models (LLMs) suffer severe performance degradation when facing extremely low-bit (sub 2-bit) quantization. Several existing sub 2-bit post-training quantization (PTQ) methods utilize a mix-precision scheme by leveraging an…

机器学习 · 计算机科学 2025-08-07 Jiaqi Zhao , Miao Zhang , Ming Wang , Yuzhang Shang , Kaihao Zhang , Weili Guan , Yaowei Wang , Min Zhang

Large Language Models (LLMs) with multimodal capabilities have revolutionized vision-language tasks, but their deployment often requires huge memory and computational resources. While post-training quantization (PTQ) has successfully…

计算机视觉与模式识别 · 计算机科学 2025-10-28 Shubhang Bhatnagar , Andy Xu , Kar-Han Tan , Narendra Ahuja

Post-training quantization (PTQ) of large language models (LLMs) holds the promise in reducing the prohibitive computational cost at inference time. Quantization of all weight, activation and key-value (KV) cache tensors to 4-bit without…

机器学习 · 计算机科学 2025-02-05 Utkarsh Saxena , Sayeh Sharify , Kaushik Roy , Xin Wang

Post-training quantization (PTQ) is the go-to compression technique for large generative models, such as stable diffusion or large language models. PTQ methods commonly keep the softmax activation in higher precision as it has been shown to…

机器学习 · 计算机科学 2023-09-06 Nilesh Prasad Pandey , Marios Fournarakis , Chirag Patel , Markus Nagel

It is critical to deploy complicated neural network models on hardware with limited resources. This paper proposes a novel model quantization method, named the Low-Cost Proxy-Based Adaptive Mixed-Precision Model Quantization (LCPAQ), which…

计算机视觉与模式识别 · 计算机科学 2024-04-04 Junzhe Chen , Qiao Yang , Senmao Tian , Shunli Zhang

Large transformer models have demonstrated remarkable success. Post-training quantization (PTQ), which requires only a small dataset for calibration and avoids end-to-end retraining, is a promising solution for compressing these large…

机器学习 · 计算机科学 2024-02-09 Zhikai Li , Xuewen Liu , Jing Zhang , Qingyi Gu

Supervised fine-tuning is a standard method for adapting pre-trained large language models (LLMs) to downstream tasks. Quantization has been recently studied as a post-training technique for efficient LLM deployment. To obtain quantized…

机器学习 · 计算机科学 2025-06-09 Quan Wei , Chung-Yiu Yau , Hoi-To Wai , Yang Katie Zhao , Dongyeop Kang , Youngsuk Park , Mingyi Hong

The ever-growing computational complexity of Large Language Models (LLMs) necessitates efficient deployment strategies. The current state-of-the-art approaches for Post-training Quantization (PTQ) often require calibration to achieve the…

计算与语言 · 计算机科学 2024-05-24 Alireza Ghaffari , Sharareh Younesian , Vahid Partovi Nia , Boxing Chen , Masoud Asgharian

Recently, quantization has been widely used for the compression and acceleration of large language models (LLMs). Due to the outliers in LLMs, it is crucial to flatten weights and activations to minimize quantization error with equally…

计算与语言 · 计算机科学 2025-08-12 Yuxuan Sun , Ruikang Liu , Haoli Bai , Han Bao , Kang Zhao , Yuening Li , Jiaxin Hu , Xianzhi Yu , Lu Hou , Chun Yuan , Xin Jiang , Wulong Liu , Jun Yao

Post-training quantization (PTQ) is a primary approach for deploying large language models without fine-tuning, and the quantized performance is often strongly affected by the calibration in PTQ. By contrast, in vision-language models…

计算机视觉与模式识别 · 计算机科学 2026-02-10 Zhenhao Shang , Haizhao Jing , Guoting Wei , Haokui Zhang , Rong Xiao , Jianqing Gao , Peng Wang

Quantizing the activations of large language models (LLMs) has been a significant challenge due to the presence of structured outliers. Most existing methods focus on the per-token or per-tensor quantization of activations, making it…

计算与语言 · 计算机科学 2024-06-28 Jinguang Wang , Yuexi Yin , Haifeng Sun , Qi Qi , Jingyu Wang , Zirui Zhuang , Tingting Yang , Jianxin Liao

Catastrophic forgetting poses a fundamental challenge in continual learning, particularly when models are quantized for deployment efficiency. We systematically investigate the interplay between quantization precision (FP16, INT8, INT4) and…

机器学习 · 计算机科学 2025-12-23 Michael S. Zhang , Rishi A. Ruia , Arnav Kewalram , Saathvik Dharmapuram , Utkarsh Sharma , Kevin Zhu

Multimodal Large Language Models (MLLMs) have shown strong reasoning ability, but their high computational and memory costs hinder deployment in resource-constrained settings. While Post-Training Quantization (PTQ) and vision token pruning…

计算机视觉与模式识别 · 计算机科学 2026-04-06 Xinhao Wang , Zhonyu Xia , Zhiwei Lin , Zhe Li , Yongtao Wang

Emergent Large Language Models (LLMs) use their extraordinary performance and powerful deduction capacity to discern from traditional language models. However, the expenses of computational resources and storage for these LLMs are stunning,…

计算与语言 · 计算机科学 2024-06-25 Yifei Gao , Jie Ou , Lei Wang , Yuting Xiao , Zhiyuan Xiang , Ruiting Dai , Jun Cheng

Rotation-based Post-Training Quantization (PTQ) has emerged as a promising solution for mitigating activation outliers in the quantization of Large Language Models (LLMs). Global rotation methods achieve inference efficiency by fusing…

计算机视觉与模式识别 · 计算机科学 2026-05-29 Suyoung Kim , Sunghyun Wee , Hyeonjin Kim , Kyomin Hwang , Hyunho Lee , Nojun Kwak