Publication

Correcting Confusion Matrices for Phone Recognizers

2007
Reports

Abstract

Modern speech recognition has many ways of quantifying the misrecognitions a speech recognizer makes. The errors in modern speech recognition makes extensive use of the Levenshtein algorithm to find the distance between the labeled target and the recognized hypothesis. This algorithm has problems when properly aligning substitution confusions due to the lack of knowledge about the system. This work addresses a shortcoming of the alignment provided by speech recognition analysis systems (HTK specifically) and provides a more applicable algorithm for aligning the hypothesis with the target. This new procedure takes into account the systematic errors the recognizer will make and uses that knowledge to produce correct alignments.

Official source

https://infoscience.epfl.ch/entities/publication/89c08257-2ebe-419b-b27f-dd700268107d

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2007
Reports

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/89c08257-2ebe-419b-b27f-dd700268107d

About this result

Related concepts (29)

Speech recognition

Speech recognition is an interdisciplinary subfield of computer science and computational linguistics that develops methodologies and technologies that enable the recognition and translation of spoken language into text by computers. It is also known as automatic speech recognition (ASR), computer speech recognition or speech to text (STT). It incorporates knowledge and research in the computer science, linguistics and computer engineering fields. The reverse process is speech synthesis.

Speech synthesis

Speech synthesis is the artificial production of human speech. A computer system used for this purpose is called a speech synthesizer, and can be implemented in software or hardware products. A text-to-speech (TTS) system converts normal language text into speech; other systems render symbolic linguistic representations like phonetic transcriptions into speech. The reverse process is speech recognition. Synthesized speech can be created by concatenating pieces of recorded speech that are stored in a database.

Speech processing

Speech processing is the study of speech signals and the processing methods of signals. The signals are usually processed in a digital representation, so speech processing can be regarded as a special case of digital signal processing, applied to speech signals. Aspects of speech processing includes the acquisition, manipulation, storage, transfer and output of speech signals. Different speech processing tasks include speech recognition, speech synthesis, speaker diarization, speech enhancement, speaker recognition, etc.

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