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A hybrid Bald Eagle-Crow Search algorithm for gaussian mixture model optimisation in the speaker verification framework

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Decision Analytics Journal 2024年 10卷

作者： Nirmal, Asmita Jayaswal, Deepak Kachare, Pramod H. Department Electronics and Telecommunication Engineering Datta Meghe College of Engineering Airoli Maharashtra Navi Mumbai 400708 India Department Electronics and Telecommunication Engineering St. Francis Institute of Technology Borivali Maharashtra Mumbai 400103 India Department Electronics and Telecommunication Engineering Ramrao Adik Institute of Technology D.Y. Patil Deemded to be University Nerul Maharashtra Navi Mumbai 400706 India

A mutualism of nature-inspired algorithms, the Bald Eagle Search algorithm (BESA) with the Crow Search algorithm (CSA), is proposed for gaussian mixture model optimisation in the speaker verification framework. BESA simulates bald eagles’ hunting behaviour, whereas CSA simulates crows’ food-hiding behaviour. BESA excels in exploitation but has limitations in exploration, whereas CSA showcases strong exploration capabilities but faces challenges in effective exploitation. BESA's hunting characteristic combines crows’ memory update to generate a hybrid Bald Eagle-Crow Search algorithm (HBE-CSA). The ability of the proposed HBE-CSA is tested on clean speech utterances from the Librispeech dataset and eight real-life noisy conditions from the AURORA dataset at four different Signal-to-Noise Ratios (SNRs). The comparative analysis shows that the proposed HBE-CSA converges with higher log-likelihood than individual search algorithms and the state-of-the-art Expectation Maximisation algorithm. Detection error trade-off curves validate the results of convergence behaviour, indicating that best speaker models are built using the proposed HBE-CSA. The noise analysis shows the smallest equal error rate for the proposed HBE-CSA at different SNRs than competing algorithms. The proposed HBE-CSA holds promise for optimising models not only in speaker verification but also across other areas of speech processing. © 2023 The Author(s)

关键词： Bald Eagle Search algorithm Crow Search algorithm gaussian mixture model hybrid optimisation algorithm Speaker verification

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