PitchKeywordExtractor: Prosody-based Automatic Keyword Extraction for Speech Content
Yurij Lezhenin, Artyom Zhuikov, Natalia Bogach, Elena Boitсova, Evgeny Pyshkin · Annals of Computer Science and Information Systems · 2017
Keyword extraction is widely used for information indexing, compressing, summarizing, etc. Existing keyword extraction techniques apply various text-based algorithms and metrics to locate the keywords.At the same time, some types of audio and audiovisual content, e. g. lectures, talks, interviews and other speech-oriented information, allow to perform keyword search by prosodic accents made by a speaker.This paper presents PitchKeywordExtractor -an algorithm with its software prototype for prosody-based automatic keyword extraction in speech content.It operates together with a third-party automatic speech recognition system, handles speech prosody by a pitch detection algorithm and locates the keywords using pitch contour cross-correlation with four tone units taken from D. Brazil discourse intonation model.