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Wyświetlanie 1-6 z 6
Tytuł:
Optimal spoken dialog control in hands-free medical information systems
Autorzy:
Sas, J.
Powiązania:
https://bibliotekanauki.pl/articles/333081.pdf
Data publikacji:
2009
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
rozpoznawanie mowy automatyczne
optymalizacja genetyczna
systemy informacji medycznej
automatic speech recognition
genetic optimization
medical information systems
Opis:
In the paper a method of optimal selection of utterances used as command entry-words for voice controlled application is presented. Voice controlled programs seem to be particularly useful in the area of medical informatics, where a physician interacts with a program by voice while operating the medical device or being involved in examinations requiring manual activities. The proposed method selects command words from sets of proposals defined for each command so as to minimize the overall probability of incorrect command recognition. First the entry-word dissimilarity matrix is calculated. The word dissimilarities are evaluated using HMM models consisting of appropriately trained acoustic models of the phonemes constituting words. The trained HMM is used as the sample utterance generator for the word. The artificially created utterance samples are then recognized by speech recognizers created for pairs of words. The estimation of correct recognition probability is used as the word dissimilarity measure. The word dissimilarities are then used to determine the average assessment of words selections that can be used as commands. Selection is created by choosing single word from sets of candidates defined for each command. Finally, suboptimal selection is found by using genetic algorithm. Experiments carried out prove that suboptimal selection of command entry-words can observably increase the accuracy of spoken commands recognition in many cases.
Źródło:
Journal of Medical Informatics & Technologies; 2009, 13; 113-120
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Automatic recognition of voice commands in a car cabin
Automatyczne rozpoznawanie komend głosowych w kabinie pojazdu
Autorzy:
Mięsikowska, M.
Ruiter de, E.
Powiązania:
https://bibliotekanauki.pl/articles/156597.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
car cabin
in-car speech recognition
acoustics
speech intelligibility
kabina pojazdu
automatyczne rozpoznawanie mowy
warunki akustyczne
zrozumiałość mowy
Opis:
Automatic speech recognition systems are applied in vehicles. It is possible to control a navigation system, an air conditioning system, a media player, and make phone calls using voice commands. The effectiveness of speech recognition systems depends largely on the acoustic conditions in the cabin of a vehicle. In contrast, the recognition accuracy, determines the ability to extend the functionality of the application of speech recognition systems, not only to the basic functions listed above, but also to control the systems that affect the movement of the vehicle. The work shows the preliminary results of research on speech recognition and evaluation of speech intelligibility in the cabin of the vehicle in the presence of noise barriers. These results may be helpful in assessing the speech intelligibility and the results of automatic speech recognition systems in the cabin of the vehicle.
Systemy automatycznego rozpoznawania mowy są aplikowane w pojazdach. Za pomocą komend głosowych możemy sterować nawigacją, systemem klimatyzacji, odtwarzaczem multimediów, oraz wykonywać połączenia telefoniczne. Skuteczność systemów rozpoznawania mowy zależna jest w dużej mierze od warunków akustycznych panujących w kabinie pojazdu. Natomiast dokładność rozpoznawania, warunkuje możliwość rozszerzenia funkcjonalności stosowania systemów rozpoznawania mowy nie tylko do podstawowych funkcji wymienionych wyżej, ale także do sterowania układami mającymi wpływ na poruszanie się pojazdu. Praca pokazuje wstępne wyniki badań w zakresie rozpoznawania mowy oraz oceny zrozumiałości mowy w kabinie pojazdu w obecności ekranów akustycznych. Wyniki badań mogą okazać się pomocne w ocenie zrozumiałości mowy i rezultatów automatycznego rozpoznawania mowy w kabinie pojazdu.
Źródło:
Pomiary Automatyka Kontrola; 2014, R. 60, nr 8, 8; 652-654
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Building compact language models for medical speech recognition in mobile devices with limited amount of memory
Autorzy:
Sas, J.
Powiązania:
https://bibliotekanauki.pl/articles/332971.pdf
Data publikacji:
2012
Wydawca:
Uniwersytet Śląski. Wydział Informatyki i Nauki o Materiałach. Instytut Informatyki. Zakład Systemów Komputerowych
Tematy:
automatyczne rozpoznawanie mowy
medyczne systemy informacyjne
modelowanie języka
automatic speech recognition
medical information systems
language modeling
Opis:
The article presents the method of building compact language model for speech recognition in devices with limited amount of memory. Most popularly used bigram word-based language models allow for highly accurate speech recognition but need large amount of memory to store, mainly due to the big number of word bigrams. The method proposed here ranks bigrams according to their importance in speech recognition and replaces explicit estimation of less important bigrams probabilities by probabilities derived from the class-based model. The class-based model is created by assigning words appearing in the corpus to classes corresponding to syntactic properties of words. The classes represent various combinations of part of speech inflectional features like number, case, tense, person etc. In order to maximally reduce the amount of memory necessary to store class-based model, a method that reduces the number of part-of-speech classes has been applied, that merges the classes appearing in stochastically similar contexts in the corpus. The experiments carried out with selected domains of medical speech show that the method allows for 75% reduction of model size without significant loss of speech recognition accuracy.
Źródło:
Journal of Medical Informatics & Technologies; 2012, 20; 111-119
1642-6037
Pojawia się w:
Journal of Medical Informatics & Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pipelined language model construction for Polish speech recognition
Autorzy:
Sas, J.
Żołnierek, A.
Powiązania:
https://bibliotekanauki.pl/articles/329841.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
automatic speech recognition
hidden Markov model
adaptive language model
automatyczne rozpoznawanie mowy
model Markova ukryty
model językowy adaptacyjny
Opis:
The aim of works described in this article is to elaborate and experimentally evaluate a consistent method of Language Model (LM) construction for the sake of Polish speech recognition. In the proposed method we tried to take into account the features and specific problems experienced in practical applications of speech recognition in the Polish language, reach inflection, a loose word order and the tendency for short word deletion. The LM is created in five stages. Each successive stage takes the model prepared at the previous stage and modifies or extends it so as to improve its properties. At the first stage, typical methods of LM smoothing are used to create the initial model. Four most frequently used methods of LM construction are here. At the second stage the model is extended in order to take into account words indirectly co-occurring in the corpus. At the next stage, LM modifications are aimed at reduction of short word deletion errors, which occur frequently in Polish speech recognition. The fourth stage extends the model by insertion of words that were not observed in the corpus. Finally the model is modified so as to assure highly accurate recognition of very important utterances. The performance of the methods applied is tested in four language domains.
Źródło:
International Journal of Applied Mathematics and Computer Science; 2013, 23, 3; 649-668
1641-876X
2083-8492
Pojawia się w:
International Journal of Applied Mathematics and Computer Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Recognition of speaker’s age group and gender for a large database of telephone-recorded voices
Autorzy:
Staroniewicz, Piotr
Powiązania:
https://bibliotekanauki.pl/articles/2202432.pdf
Data publikacji:
2022
Wydawca:
Politechnika Poznańska. Instytut Mechaniki Stosowanej
Tematy:
speech processing
automatic age recognition
przetwarzanie mowy
automatyczne rozpoznawanie wieku
Opis:
The paper presents the results of the automatic recognition of age group and gender of speakers performed for the large SpeechDAT(E) acoustic database for the Polish language, containing recordings of 1000 speakers (486 males/514 females) aged 12 to 73, recorded in telephone conditions. Three age groups were recognised for each gender. Mel Frequency Cepstral Coefficients (MFCC) were used to describe the recognized signals parametrically. Among the classification methods tested in this study, the best results were obtained for the SVM (Support Vector Machines) method.
Źródło:
Vibrations in Physical Systems; 2022, 33, 2; art. no. 2022203
0860-6897
Pojawia się w:
Vibrations in Physical Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Behavioral features of the speech signal as part of improving the effectiveness of the automatic speaker recognition system
Autorzy:
Mały, Dominik
Dobrowolski, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/27323689.pdf
Data publikacji:
2023
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
automatic speaker recognition
automatic speaker recognition systems
physical features
behavioral features
speech signal
automatyczne rozpoznawanie mówiącego
sygnał mowy
system automatycznego rozpoznawania mówiącego
cecha behawioralna
cecha fizyczna
Opis:
The current reality is saturated with intelligent telecommunications solutions, and automatic speaker recognition systems are an integral part of many of them. They are widely used in sectors such as banking, telecommunications and forensics. The ease of performing automatic analysis and efficient extraction of the distinctive characteristics of the human voice makes it possible to identify, verify, as well as authorize the speaker under investigation. Currently, the vast majority of solutions in the field of speaker recognition systems are based on the distinctive features resulting from the structure of the speaker's vocal tract (laryngeal sound analysis), called physical features of the voice. Despite the high efficiency of such systems - oscillating at more than 95% - their further development is already very difficult, due to the fact that the possibilities of distinctive physical features have been exhausted. Further opportunities to increase the effectiveness of ASR systems based on physical features appear after additional consideration of the behavioral features of the speech signal in the system, which is the subject of this article.
Źródło:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2023, 4; 26--34
2450-1859
2450-8721
Pojawia się w:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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