• Proceedings of the Korean Society for Cognitive Science Conference
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• 2005.05a
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• pp.206-211
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• 2005

한국어의 발음은 형태${\cdot}$음운론적 환경에 따라 다양하게 변화하므로 혼란을 일으키는 경우가 많다. 이에 표준발음법을 바탕으로 올바른 발음을 제시하는 한국어 표준 발음 변환기를 구현한다. 특히 본 논문에서는 세계적으로 널리 쓰이는 IPA를 활용하여 발음열을 생성해, 한국어 발음의 미세한 차이까지 표기하고, 모국어 화자뿐만 아니라 외국인 학습자들도 대상으로 하기에 적합하도록 하였다. 형태소 분석 정보, 어절 간 영향 정보 등을 활용하여 발음열 생성하였고. 발음열 생성 정확도는 98.09%였다.

• Proceedings of the Acoustical Society of Korea Conference
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• spring
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• pp.305-308
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• 2000

본 논문에서는 한국어에 나타난 외래어 중에서 외국어(영어/독일어)의 $[\int]$음이 어떻게 인식되고 해석되었는지를 살펴보았다. 특히 본 논문에서는 $[\int]$음의 영어와 독일어 발음과 한국어의 대응되는 분절음이 일대일 대응을 이루고 있지 못하다는 것을 보이고 이런 대응관계를 설명하기 위해 어떤 정보가 필요한지에 대해 살펴보았다. 즉, 독일어와 영어에서 음절의 말음으로 쓰인$[\int]$음이 한국어에서는 [쉬/시]로 인식되는데 반해 본토어에서 $[\int]$음이 음절초음의 일부로 사용된 경우에는 한국어의 외래어에서 (슈)로 화자에게 인식되고 또 문자로 표현된다 따라서 본 논문에서는 음절초음의 일부로 나타나는 외국어의 $[\int]$음과 음절말음으로 나타나는 외국어 $[\int]$음의 음성학적 기호를 분석해보고 한국어에서 서로 다른 표면형을 형성하는 이유가 본토어의 (음절 초음/말음이라는) 음운론적 특성에 기인하는 것인지 혹은 현재까지 우리가 알고 있지 못했던 $[\int]$음의 발음 위치에 따른, 즉 동시조음(coarticulation) 현상 때문에 생긴 변이음 때문인지에 대한 규명을 시도하였다. 외국어 화자의 발성실험을 통해, 한국어에서 /쉬/로 인식되는 독일어와 영어의 $/\int/$음은 /슈/로 인식되는 $/\int/$음보다 마찰소음의 peak frequency가 높거나 지속시간이 길게 나타났다 이런 결과를 근거로 영어와 독일어의 $/\int/$ 음이 한국어의 /쉬/음과 /슈/음으로 구분될 때 사용되는 음성자질은 크게 2가지, 즉 마찰소음의 peak frequency와 지속시간이며, 둘 중 한가지만 있어도 구분은 가능하나 이 2가지가 동시에 존재할 때 /쉬/음과 /슈/음의 구분이 현저히 용이해진다는 가설을 세워보았다.

• The Transactions of the Korea Information Processing Society
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• v.4 no.1
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• pp.280-287
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• 1997

The introduction of phonological knowledge, prosodic information to speech recognition and synthesis systems is very important to build successful spoken language systems. First, related works of computational phonology is overviewed and the theoretical and experimental studies of prosodic structures and boundaries in Korean are summarized. The main focus of this study is to decide which prosodic phrasing trained on a simple recurrent network. The results show information other than phonetic features. This method can be combined with other useful information to predict the boundaries more correctly and to help segmentation, which are vital for the successful speech recognition and synthesis systems.

• Phonetics and Speech Sciences
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• v.15 no.3
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• pp.27-35
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• 2023

This study aimed to investigate the effect of Chinese on the production of Korean rhythm. Korean and Chinese are typologically classified into different rhythmic categories; because of this, the phonological properties of Korean and Chinese are similar and different at the same time. As a result, Chinese can exert both positive and negative influences on the realization of Korean rhythm. To investigate the influence of the rhythm of the native language of L2 learners on their target language, we conducted an acoustic analysis using acoustic metrics like of the speech of 5 Korean native speakers and 10 advanced Chinese Korean learners. The analyzed material is a short paragraph of five sentences containing a variety of syllable structures. The results showed that KS and CS rhythms are similar in %V, VarcoV, and nPVI_S. However, CS, unlike KS, showed characteristics closer to those of a stress-timed language in the values of %V and VarcoV. There was also a significant difference in nPVI_V values. These results demonstrate a negative influence of the native language in the realization of Korean rhythm. This can be attributed to the fact that all vowels in Chinese sentence are not pronounced with the same emphasis due to neutral tone. In this sense, this study allowed us to observe influences of L1 on L2 production of rhythm.

• Annual Conference on Human and Language Technology
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• 2006.10e
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• pp.183-188
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• 2006

본 논문에서 위치 정보 데이터란 텔레메틱스 분야의 응용을 위하여 웹상에서 수집한 Point-of-Interest (POI) 데이터로서 행정구역 및 지명 인명, 상호명과 같은 위치 검색에 사용되는 어휘로 구성된다. 본 논문은 음성 인식 시스템을 구성하는 발음 사전의 개발에 관한 것으로 250k 위치 정보데이터로부터 운율어를 이용하여 불규칙 발음과 발음 변이를 포함하는 가능한 모든 발음을 생성하는 방법을 제안하는 것을 목적으로 한다. 원래 모든 POI 는 한 번씩만 데이터에 포함되어 있으므로, 그 가운데 불규칙 발음을 포함하는 POI를 검출하거나 발음을 생성하기 위해서는 각각의 POI 하나하나를 일일이 검토하는 방법밖에 없는데, 대부분의 POI 가 복합명사구로 이루어졌다는 점에 착안하여 운율어를 이용한 결과, 불규칙 발음 검출과 다중 발음 생성을 효율적으로 수행할 수 있었다. 이러한 연구는 음성처리 영역에서는 위치정보데이터의 음성인식 성능을 향상하는 데 직접적인 기여를 할 수 있고, 무엇보다도 음성학과 음운론 이론을 음성 인식 분야에 접목한 학제적 연구로서 그 의미가 있다고 할 수 있다.

• The Journal of the Acoustical Society of Korea
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• v.20 no.2
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• pp.35-43
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• 2001

Many speech recognition systems have used pronunciation lexicon with possible multiple phonetic transcriptions for each word. The pronunciation lexicon is of often manually created. This process requires a lot of time and efforts, and furthermore, it is very difficult to maintain consistency of lexicon. To handle these problems, we present a model based on morphophon-ological analysis for automatically generating Korean pronunciation variants. By analyzing phonological variations frequently found in spoken Korean, we have derived about 700 phonemic contexts that would trigger the multilevel application of the corresponding phonological process, which consists of phonemic and allophonic rules. In generating pronunciation variants, morphological analysis is preceded to handle variations of phonological words. According to the morphological category, a set of tables reflecting phonemic context is looked up to generate pronunciation variants. Our experiments show that the proposed model produces mostly correct pronunciation variants of phonological words. Then we estimated how useful the pronunciation lexicon and training phonetic transcription using this proposed systems.

• Journal of the Korean Institute of Telematics and Electronics C
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• v.34C no.5
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• pp.55-65
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• 1997

In many cases, a dialogue system can't extract the correct analysis information of a user's spoken utterance, because of its own ungrammatical components. Therefore, in order to perform a correct before it performs the syntactic processing. In this paper, we use a real dialogue corpus and classify these ungrammatical errors as 4 categories : phonological, syntactic, semantic errors that consist of speech reparis and inversions, and propose an algorithm to detect and correct the errors. In short, this paper proposes a method to detect and correct the speech repairs and inversions that are classified as the phonological and syntactic errors to implement a robust dialogue system. And, through the test of real dialogue data, this paper shows an efficiency of the proposed algorithm.

• MALSORI
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• no.25_26
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• pp.38-51
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• 1993

Korean phonology has not recognised metrical foot as a phonological unit to account for certain phonological processes. This paper, however, suggests that an optional h-deletion process in Korean should require the notion of metrical foot as an independent phonological domain. The previous analyses rely on the notion of speech speed to explain optional h-deletion : i. e. an intervocalic h is deleted in fast speech, but in slow speech it remains. This paper claims that the notion of speech speed should be reinterpreted in terms of metrical foot : i.e. foot-internal t is deleted, but foot-initial h remains. Such analysis provides evidence that metrical foot constitutes a phonological unit in Korean phonology. With the notion of metrical foot, it enables us to achieve more detailed and accurate analysis of the optional h-deletion process in Korean.

• Korean Linguistics
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• v.79
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• pp.63-89
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• 2018

This study explores contrastive relation among voiced bilabial fricative [${\ss}$], voiceless bilabial stop [p] and glide [w] in Middle Korean consonant system based on Probabilistic Model. Preceding researches about voiced bilabial fricative [${\ss}$] proposed two influential arguments. One is voiced bilabial fricative [${\ss}$] was an independent phoneme, the other is it was not an independent phoneme but an allophone of voiceless bilabial stop [p] in Middle Korean. This study applies Probabilistic Phonological Relationship Model (PPRM) for solving the problem of dichotomy about contrastive and allophonic relations. The analysis result of the contrastive entropy by PPRM suggests that voiced bilabial fricative [${\ss}$] was just an allophone of voiceless bilabial stop [p] or glide [w] in Middle Korean. Comparing the entropies between [p] and other consonants with the entropies between [${\ss}$] and other consonants, a continuum defined in terms of entropy reveals that [${\ss}$] in Middle Korean was more allophonic than phonemic.

• The Journal of the Acoustical Society of Korea
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• v.21 no.7
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• pp.656-664
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• 2002

We present a statistical analysis of Korean phonological variations using a Grapheme-to-Phoneme (GPT) system. The GTP system used for experiments generates pronunciation variants by applying rules modeling obligatory and optional phonemic changes and allophonic changes. These rules are derived form morphophonological analysis and government standard pronunciation rules. The GTP system is optimized for continuous speech recognition by generating phonetic transcriptions for training and constructing a pronunciation dictionary for recognition. In this paper, we describe Korean phonological variations by analyzing the statistics of phonemic change rule applications for the 60,000 sentences in the Samsung PBS Speech DB. Our results show that the most frequently happening obligatory phonemic variations are in the order of liaison, tensification, aspirationalization, and nasalization of obstruent, and that the most frequently happening optional phonemic variations are in the order of initial consonant h-deletion, insertion of final consonant with the same place of articulation as the next consonants, and deletion of final consonant with the same place of articulation as the next consonant's, These statistics can be used for improving the performance of speech recognition systems.