Non-intrusive Quality Evaluation of Speech Processed in Noisy and Reverberant Environments (2021)
Abstract / truncated to 115 words
In many speech applications such as hands-free telephony or voice-controlled home assistants, the distance between the user and the recording microphones can be relatively large. In such a far-field scenario, the recorded microphone signals are typically corrupted by noise and reverberation, which may severely degrade the performance of speech recognition systems and reduce intelligibility and quality of speech in communication applications. In order to limit these effects, speech enhancement algorithms are typically applied. The main objective of this thesis is to develop novel speech enhancement algorithms for noisy and reverberant environments and signal-based measures to evaluate these algorithms, focusing on solutions that are applicable in realistic scenarios. First, we propose a single-channel speech enhancement algorithm ... toggle 8 keywordsspeech processing – dereverberation – noise reduction – beamforming – spectral gain – speech quality – model tree – LSTM
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