20.500.12556/DKUM-66439 A comprehensive noise robust speech parameterization algorithm using wavelet packet decomposition-based denoising and speech feature representation techniques This paper concerns the problem of automatic speech recognition in noise-intense and adverse environments. The main goal of the proposed work is the definition, implementation, and evaluation of a novel noise robust speech signal parameterization algorithm. The proposed procedure is based on time-frequency speech signal representation using wavelet packet decomposition. A new modified soft thresholding algorithm based on time-frequency adaptive threshold determination was developed to efficiently reduce the level of additive noise in the input noisy speech signal. A two-stage Gaussian mixture model (GMM)-based classifier was developed to perform speech/nonspeech as well as voiced/unvoiced classification. The adaptive topology of the wavelet packet decomposition tree based on voiced/unvoiced detection was introduced to separately analyze voiced and unvoiced segments of the speech signal. The main feature vector consists of a combination of log-root compressed wavelet packet parameters, and autoregressive parameters. The final output feature vector is produced using a two-staged feature vector postprocessing procedure. In the experimental framework, the noisy speech databases Aurora 2 and Aurora 3 were applied together with corresponding standardized acoustical model training/testing procedures. The automatic speech recognition performance achieved using the proposed noise robust speech parameterization procedure was compared to the standardized mel-frequency cepstral coefficient (MFCC) feature extraction procedures ETSI ES 201 108 and ETSI ES 202 050. speech parametrization algorithm speech techniques algoritmi parametri govora tehnike govora true true true Angleški jezik Slovenski jezik Znanstveno delo 2017-06-26 12:19:53 2017-06-26 12:20:54 2022-07-11 03:06:58 2019-07-11 15:47:33 2007 0 0 str. 1-20 Letn. 2007 2007 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1687-6172 004.9 5849428 11385622 10.1155/2007/64102 1687-6172 URN:SI:UM:DK:IYT9PUUY EURASIP_Journal_on_Advances_in_Signal_Processing_2007_Kotnik,_Kacic_A_Comprehensive_Noise_Robust_Speech_Parameterization_Algorithm_Using.pdf EURASIP_Journal_on_Advances_in_Signal_Processing_2007_Kotnik,_Kacic_A_Comprehensive_Noise_Robust_Speech_Parameterization_Algorithm_Using.pdf 1 B11834830317136189B6F90E818F907E a4cb8416cf8116ce48db6a20cf6e329d02ba737215fb29d38fb77e759f7b1e45 4ce9c5ef-7c0e-11eb-bb7a-00155d0001ca https://dk.um.si/Dokument.php?lang=slv&id=113131 https://asp-eurasipjournals.springeropen.com/articles/10.1155/2007/64102 1 https://dk.um.si/Dokument.php?lang=slv&id=113130 Fakulteta za elektrotehniko, računalništvo in informatiko 0 0 0