Alignment of Speech to Highly Imperfect Text Transcriptions

Details Alignment of Speech to Highly Imperfect Text Transcriptions Alignment of Speech to Highly Imperfect Text Transcriptions

2006-12-28

arxiv.org/abs/cs/0612139v1

Computer Science

Sound

Scientific paper

We introduce a novel and inexpensive approach for the temporal alignment of speech to highly imperfect transcripts from automatic speech recognition (ASR). Transcripts are generated for extended lecture and presentation videos, which in some cases feature more than 30 speakers with different accents, resulting in highly varying transcription qualities. In our approach we detect a subset of phonemes in the speech track, and align them to the sequence of phonemes extracted from the transcript. We report on the results for 4 speech-transcript sets ranging from 22 to 108 minutes. The alignment performance is promising, showing a correct matching of phonemes within 10, 20, 30 second error margins for more than 60%, 75%, 90% of text, respectively, on average.

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