• 제목/요약/키워드: speech inversion

검색결과 6건 처리시간 0.026초

심층신경망을 이용한 조음 예측 모형 개발 (Development of articulatory estimation model using deep neural network)

  • 유희조;양형원;강재구;조영선;황성하;홍연정;조예진;김서현;남호성
    • 말소리와 음성과학
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    • 제8권3호
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    • pp.31-38
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    • 2016
  • Speech inversion (acoustic-to-articulatory mapping) is not a trivial problem, despite the importance, due to the highly non-linear and non-unique nature. This study aimed to investigate the performance of Deep Neural Network (DNN) compared to that of traditional Artificial Neural Network (ANN) to address the problem. The Wisconsin X-ray Microbeam Database was employed and the acoustic signal and articulatory pellet information were the input and output in the models. Results showed that the performance of ANN deteriorated as the number of hidden layers increased. In contrast, DNN showed lower and more stable RMS even up to 10 deep hidden layers, suggesting that DNN is capable of learning acoustic-articulatory inversion mapping more efficiently than ANN.

뇌졸중 환자의 흡인유무에 따른 후두닫힘 지속시간 (Laryngeal Closure Duration in Post-stroke Patients)

  • 박태옥;고도흥
    • 말소리와 음성과학
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    • 제2권2호
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    • pp.79-83
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    • 2010
  • As bolus enters the pharynx during the swallow, laryngeal closure takes place by approximating the epiglottis to the arytenoid Laryngeal Closure Duration(LCD) is the duration of contact between the arytenoids and the epiglottis from the first contact to the last(Logemann et al, 2000). Epiglottic inversion continues pharyngeal swallow stage is completed in order to protect the airway. The purpose of this study is to measure layrngeal closure duration (LCD) in three groups of subjects: a) 10 stroke patients who aspirate before and during the swallow(aspirators), b) 10 stroke patients who do not aspirate during the swallow c)10 normal control subjects. Means and standard deviation of LCD was analyzed in both 5ml and 10 ml thin liquids using 100msec timer in videoflouroscopic swallowing examination. The mean for each group was 0.15 seconds shorter from aspirators to control group. There was a significant difference between aspirators and normal subjects for laryngeal closure duration during the swallow. Laryngeal closure duration after a stroke lead to aspiration. However, only one of this temporal problem may not be enough to aspiration.

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윈도우가 적용된 자기상관에 의한 선형예측부호의 개선 (Improvement of the Linear Predictive Coding with Windowed Autocorrelation)

  • 이창영;이채봉
    • 한국전자통신학회논문지
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    • 제6권2호
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    • pp.186-192
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    • 2011
  • 본 논문은 선형예측부호의 개선을 위한 새로운 과정을 제안한다. 코딩에 따른 오차를 줄이기 위하여, 신호에 윈도우를 적용하는 과정과 선형예측 과정의 순서를 바꾸었다. 이 처방은 윈도우를 적용한 자기상관을 이용하여 선형예측부호를 추출하는 것에 해당한다. 기존의 방법에서는 보다 적은 파라미터에 대해 레빈슨-더빈의 재귀적 계산법을 적용하는 것이 가능한 반면, 본 논문에서 제안된 방법에서는 더 많은 작업 파라미터에 대한 역행렬 계산이 필요하므로, 보다 긴 계산 시간이 요구된다. 하지만, 여러 음성 음소에 대해 테스트한 결과, 제안된 방법에 의하면 기존의 기술에 비해 약 5 % 적은 파워 왜곡이 얻어짐이 밝혀졌다. 따라서 부호화의 신뢰성에 관한 한, 기존의 기술에 비해 본 논문에서 제안된 방법이 더 나은 것으로 사료된다. 40명에 의해 발성된 50 고립단어에 대한 화자종속 음성인식 시험에서도 제안된 방법이 보다 우수한 성능을 보여주었다.

Amoretti와 Sonnets from the Portuguese의 율격 비교 (A Comparison of Meter in Amoretti and Sonnets from the Portuguese)

  • 손일권
    • 대한음성학회지:말소리
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    • 제63호
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    • pp.23-46
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    • 2007
  • The purpose of this paper is to compare linguistic features of meter in Amoretti and Sonnets from the Portuguese. Amoretti was composed in the 16th century and Sonnets from the Portuguese in the 19th century. Two poems are very strict in satisfying $^*<_I$(LS that makes a lexical stress matched on a strong position. But they allow a peaked monosyllabic word to be matched on a weak position only if it does not violate $^*(\dot{\sigma}\;{\sigma})$. Syntactic inversions which are found in two poems occur to satisfy metrical constraints and rhyme. Particularly, syntactic inversions for rhyme are mainly found in Amoretti, but are rare in Sonnets from the Portuguese which includes many enjambment lines. Furthermore, this paper shows that syntactic inversions can be explained by the interaction of constraints, such as metrical constraints, SCI, and Binary Foot.

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Gram-Schmidt 직교화를 이용한 affine projection 알고리즘의 근사적 구현 (An approximated implementation of affine projection algorithm using Gram-Scheme orthogonalization)

  • 김은숙;정양원;박선준;박영철;윤대희
    • 한국통신학회논문지
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    • 제24권9B호
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    • pp.1785-1794
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    • 1999
  • Affine projection 알고리즘은 RLS보다 적은 계산량으로 LMS보다 우수한 수렴성능을 나타낸다. 그러나 affine projection 알고리즘은 역행렬 연산을 필요로 하기 때문에 여전히 LMS에 비해 과중한 계산을 필요로 한다. 본 논문에서는 affine projection 알고리즘을 분석하여 이 알고리즘이 Gram-Scheme 구조로 해석될 수 있음을 보이고 이를 이용하여 NLMS와 비슷한 계산량으로 affine projection 알고리즘을 근사적으로 구현할 수 있는 새로운 알고리즘을 제안하였다. 제안한 방법은 NLMS와 비슷한 계산량을 가지면서 기존의 affine projection 알고리즘과 비슷한 수렴성능을 나타내었다.

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노인성치매(老人性痴呆)에 대(對)한 문헌적(文獻的) 고찰(考察) (The bibliographical study on the senile dementia)

  • 김현아;정지천;이원철
    • 대한한방내과학회지
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    • 제13권2호
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    • pp.57-69
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    • 1992
  • The study has been carried out to investigate of the senile dementia by referring to 35 literratures. The results were as follows ; 1. In oriental medical science, senile dementia is belong to the category of dullness(매病), insanity(癲狂證), weak(虛勞), amnesia(健忘), etc. 2. The cause of senile dementia summarize the phlegm preventid-heart hole(痰迷心竅), marrow lack(髓海不足), aged follow weaking of body and disfunction of the internal organs(年老體弱과 臟腑機能 失調), the bad blood with vatal block(氣滯血瘀), feeling inharmony, etc in the view of oriental medical science and make the vanishment of the cerebral atrophy and the cerebral cell but havn't indicated the remarkable cause in that of western medical science. The diseases with cause make a point of Alzheimer's dementia, frequent infarction dementia, etc and psychological and environmental factor too. The marrow lack is related to Alzheimer's dementia, the feeling inharmony, psychologic and environmental factor, the phlegm prevented-heart hole and bad blood with vatal block, frequent infarction dementia. 3. The senile dementia is related cleary to the function of the internal organs in oriental medical sciences respect Especially in relation to kidney and marrow, it is presented new cause view to solve the cure problem of western medical science is studying its cause only the anatomic pathology with cerebrum and is thinking to solve cure possibility. 4. The symptom of senile dementia is as follows. The obstacle of a aspect of the Language, Emotion, Behavior. mute, speech inversion, sometimes a laugh sometimes a cry, behavior strange, failure of memory etc. 5. The treatment of senile dementia is follows. The methodes of cure apply phlegm changed-mud(豁痰化濁), self-kidney and added marrow(補腎益髓), self-energy and nutritive blood(益氣補血), vital blood(祛瘀活血), peace of mind and relief(安神情志). The medicines of cure make the most of (sesimtang, jwagui-hwan, tonggwuhwalhuel tang) add and subtract, daeboweonjeon, guibitang, and so on.

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