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The success of the multilingual automatic speech recognition systems empowered many voice-driven applications. However, measuring the performance of such systems remains a major challenge, due to its dependency on manually transcribed…

Computation and Language · Computer Science 2023-04-04 Shammur Absar Chowdhury , Ahmed Ali

Automatic speech recognition (ASR) systems are predominantly evaluated using the Word Error Rate (WER). However, raw token-level metrics fail to capture semantic fidelity and routinely obscures the `diversity tax', the disproportionate…

Machine Learning · Computer Science 2026-03-06 Ting-Hui Cheng , Line H. Clemmensen , Sneha Das

The Word Error Rate (WER) is the common measure of accuracy for Automatic Speech Recognition (ASR). Transcripts are usually pre-processed by substituting specific characters to account for non-semantic differences. As a result of this…

Computation and Language · Computer Science 2024-09-20 Korbinian Kuhn , Verena Kersken , Gottfried Zimmermann

Measuring the performance of automatic speech recognition (ASR) systems requires manually transcribed data in order to compute the word error rate (WER), which is often time-consuming and expensive. In this paper, we continue our effort in…

Audio and Speech Processing · Electrical Eng. & Systems 2020-08-11 Ahmed Ali , Steve Renals

Automatic Speech Recognition (ASR) offers significant potential to reduce the workload of medical personnel, for example, through the automation of documentation tasks. While numerous benchmarks exist for the English language, specific…

Computation and Language · Computer Science 2026-01-29 Thomas Schuster , Julius Trögele , Nico Döring , Robin Krüger , Matthieu Hoffmann , Holger Friedrich

Evaluating automatic speech recognition (ASR) systems is a classical but difficult and still open problem, which often boils down to focusing only on the word error rate (WER). However, this metric suffers from many limitations and does not…

Computation and Language · Computer Science 2026-05-01 Thibault Bañeras-Roux , Mickaël Rouvier , Jane Wottawa , Richard Dufour

Word error rate (WER) and character error rate (CER) are standard metrics in Speech Recognition (ASR), but one problem has always been alternative spellings: If one's system transcribes adviser whereas the ground truth has advisor, this…

Computation and Language · Computer Science 2023-06-08 Shigeki Karita , Richard Sproat , Haruko Ishikawa

Automatic speech recognition (ASR) is a core component of human--computer interaction and an increasingly important front-end for LLM-based assistants and agents. However, most current ASR systems still follow a single-pass paradigm, which…

Artificial Intelligence · Computer Science 2026-05-29 Zixuan Jiang , Yanqiao Zhu , Peng Wang , Qinyuan Chen , Xinjian Zhao , Xipeng Qiu , Wupeng Wang , Zhifu Gao , Xiangang Li , Kai Yu , Xie Chen

While Automatic Speech Recognition (ASR) is typically benchmarked by word error rate (WER), real-world applications ultimately hinge on semantic fidelity. This mismatch is particularly problematic for dysarthric speech, where articulatory…

Audio and Speech Processing · Electrical Eng. & Systems 2026-01-30 Xiuwen Zheng , Sixun Dong , Bornali Phukon , Mark Hasegawa-Johnson , Chang D. Yoo

Text encodings from automatic speech recognition (ASR) transcripts and audio representations have shown promise in speech emotion recognition (SER) ever since. Yet, it is challenging to explain the effect of each information stream on the…

Automatic speech recognition (ASR) outcomes serve as input for downstream tasks, substantially impacting the satisfaction level of end-users. Hence, the diagnosis and enhancement of the vulnerabilities present in the ASR model bear…

Computation and Language · Computer Science 2024-01-29 Seonmin Koo , Chanjun Park , Jinsung Kim , Jaehyung Seo , Sugyeong Eo , Hyeonseok Moon , Heuiseok Lim

Word error rate (WER) as a metric has a variety of limitations that have plagued the field of speech recognition. Evaluation datasets suffer from varying style, formality, and inherent ambiguity of the transcription task. In this work, we…

The most commonly used metrics for evaluating automatic speech transcriptions, namely Word Error Rate (WER) and Character Error Rate (CER), have been heavily criticized for their poor correlation to human perception and their inability to…

Computation and Language · Computer Science 2026-05-06 Thibault Bañeras-Roux , Mickael Rouvier , Jane Wottawa , Richard Dufour

Speech separation has been successfully applied as a frontend processing module of conversation transcription systems thanks to its ability to handle overlapped speech and its flexibility to combine with downstream tasks such as automatic…

Audio and Speech Processing · Electrical Eng. & Systems 2021-07-06 Jian Wu , Zhuo Chen , Sanyuan Chen , Yu Wu , Takuya Yoshioka , Naoyuki Kanda , Shujie Liu , Jinyu Li

Automatic evaluation remains an open research question in Natural Language Generation. In the context of Sentence Simplification, this is particularly challenging: the task requires by nature to replace complex words with simpler ones that…

Computation and Language · Computer Science 2021-04-19 Thomas Scialom , Louis Martin , Jacopo Staiano , Éric Villemonte de la Clergerie , Benoît Sagot

The performances of automatic speech recognition (ASR) systems are usually evaluated by the metric word error rate (WER) when the manually transcribed data are provided, which are, however, expensively available in the real scenario. In…

Computation and Language · Computer Science 2020-09-01 Kai Fan , Jiayi Wang , Bo Li , Shiliang Zhang , Boxing Chen , Niyu Ge , Zhijie Yan

Speech enhancement (SE) systems are typically evaluated using a variety of instrumental metrics. The use of automatic speech recognition (ASR) systems to evaluate SE performance is common in literature, usually in terms of word error rate…

Audio and Speech Processing · Electrical Eng. & Systems 2026-05-13 Danilo de Oliveira , Tal Peer , Timo Gerkmann

Although modern automatic speech recognition (ASR) systems can achieve high performance, they may produce errors that weaken readers' experience and do harm to downstream tasks. To improve the accuracy and reliability of ASR hypotheses, we…

Audio and Speech Processing · Electrical Eng. & Systems 2022-01-11 Jing Du , Shiliang Pu , Qinbo Dong , Chao Jin , Xin Qi , Dian Gu , Ru Wu , Hongwei Zhou

Nowadays, speech is becoming a more common, if not standard, interface to technology. This can be seen in the trend of technology changes over the years. Increasingly, voice is used to control programs, appliances and personal devices…

Human-Computer Interaction · Computer Science 2019-09-10 Abraham Glasser

In recent years, speech-based self-supervised learning (SSL) has made significant progress in various tasks, including automatic speech recognition (ASR). An ASR model with decent performance can be realized by fine-tuning an SSL model with…

Audio and Speech Processing · Electrical Eng. & Systems 2023-08-30 Zhisheng Zheng , Ziyang Ma , Yu Wang , Xie Chen