نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه لرستان، گروه مهندسی
2 گروه برق، دانشگاه لرستان/ خرم آباد/لرستان
3 گروه مهندسی برق، دانشکده فنی و مهندسی، دانشگاه مازندران، بابلسر، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
As a widely used technique in signal processing, Sparse representation has gained significant attention in various fields, including data compression, noise reduction in speech and image signals, pattern recognition, and other signal processing-related issues. In such representations, signals are linearly combined using a small number of dictionary atoms, leading to data dimensionality reduction and improved signal processing efficiency. To accurately represent speech data, an appropriate dictionary is required to effectively represent speech signals' characteristics. In this paper, dictionaries are trained using dictionary learning algorithms and sparse representations such as MOD, K-SVD, RAMC, UD4-MOD, and OMP, in the time, time-frequency, and wavelet transform domains. The performance of the obtained dictionaries is evaluated using various time-frequency metrics such as RE, MSE, fwSegSNR, SegSNR, PESQ, and STOI. The results demonstrate that employing the K-SVD dictionary learning algorithm in conjunction with the OMP sparse representation algorithm in the STFT domain achieves promising results for speech signal reconstruction.
کلیدواژهها [English]
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