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Browsing Elektrik- Elektronik Mühendisliği by Author "Saraçlar, Murat."

Browsing Elektrik- Elektronik Mühendisliği by Author "Saraçlar, Murat."

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  • An iterative approach to keyword search in sign language 
    Yeşilbursa, Mansur. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    Sign languages are the main medium of communication for the Deaf. However, insufficient retrieval tools for sign languages restrict the Deaf’s access to information. To address this issue, we tackle the problem of keyword ...
  • Applying machine learning and natural language processing techniques to twitter sentiment classification for Turkish and English 
    Ayata, Değer. (Thesis (M.A.) - Bogazici University. Institute for Graduate Studies in the Social Sciences, 2018., 2018.)
    Determining the feelings of a user on a topic is called sentiment analysis. Senti ment analysis is done so as not just to get a sort of feedback data for decision making but also to check the emotions, characteristics and ...
  • Automatic speech recognition system adaptation for spoken lecture processing 
    Fakhan, Enver. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2021., 2021.)
    The recent developments in artificial neural networks has brought significant improvement in Automatic Speech Recognition (ASR). However the performance of the neural network based models mostly depends on the availability ...
  • Automatic topic categorization of Turkish Faxed Bank documents in the presence of OCR errors 
    Öztürk, Seçil. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    The technological advances in the last decades facilitated the easy transfer and storage of huge amounts of scanned soft documents. This improvement brings the challenge of automatically classifying big, unbalanced, ...
  • Bootstrapping a speech recognition system by using video text recognition 
    Som, Temuçin. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    In the broadcast news for the hearing impaired, the information is conveyed by three modalities: speech, sign language and sliding video text. In this work, we propose an HMM-based sliding video text recognition (SVTR) ...
  • Computer-aided transcription tool 
    Akman, Çağdaş Kayra. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2007., 2007.)
    State-of-the-art speech recognition and language processing systems widely use data-driven methods. These methods require large transcribed speech and annotated text corpora. The success of these systems greatly depends ...
  • Design and implementation of a response retrieval and reranking system 
    Deveci, Mustafa Can. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2022., 2022)
    In this master’s thesis, we started with a baseline response retrieval and re ranking system that is composed of two steps: BM25 retrieval and BERT re-ranking. After investigating the effects of several parameters and BERT ...
  • Effects of data duration, model size and session variability on speaker verification performance 
    Dikici, Erinç. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2009., 2009.)
    Speaker verification is one of the most challenging branches of biometric authentication. Covering a wide spectrum from security services to law enforcement, speaker veri cation systems are employed in phone banking, ...
  • Effects of reverberation on monaural speech separation and recognition 
    Kurçenli, Hakan. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Speech recognition is an active area of research with implementations spanning from commercial to medical applications such as hearing aids. Recognition of speech signals is studied for decades and a lot of progress has ...
  • Indexation, retrieval and decision techniques for spoken term detection 
    Can, Doğan. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2010., 2010.)
    Speech Retrieval (SR) systems aim to provide access to large multimedia archives that include a vast amount of spoken media like lecture videos, podcasts, news clips and audio books. To that end, SR integrates two well ...
  • Investigation of automatically derived subword units for Turkish LVCSR 
    Aksungurlu, Tuncay. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2008., 2008.)
    In this thesis, we performed large vocabulary continuous speech recognition (LVCSR) experiments using language models that are built upon different recognition units in order to create a suitable and successful language ...
  • Keyword search by symbolic indexing 
    Sarı, Leda. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    The aim of keyword search (KWS) is to locate written queries in large amount of audio data such as archived news broadcasts, audio/video lectures, recorded customer call-center data or conversational speech. State of the ...
  • Keyword search for low resource languages 
    Gündoğdu, M. Batuhan. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2018., 2018.)
    Retrieval of spoken content is one key endeavor, not only for finding the speech parts of interest, but also for an automated and facilitated speech mining towards better automatic speech recognition (ASR) systems. In ...
  • Keyword search for sign language 
    Tamer, Nazif Can. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    Sign language is the main communication tool for the hearing impaired. However, the information retrieval from sign language is not as easy as in spoken languages. In this thesis, three methods of information retrieval are ...
  • Multimodal representation learning for synchronized speech and videos 
    Köse, Öykü Deniz. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2020., 2020.)
    The amount of multimedia data has been increased rapidly in recent years. While this data growth enables multimodal neural network based studies, it has also resulted in a need for e cient storage and retrieval systems for ...
  • Multivariate modeling and diagnostic classification of pulmonary sounds 
    Şen, İpek. (Thesis (Ph.D.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2013., 2013.)
    Computerized pulmonary sounds analysis has become prevalent in the recent decades as it provides means for quantitative and objective evaluation, contrary to the limited and subjective nature of stethoscope auscultation. ...
  • Pre - filtered dynamic time warping for posteriorgram based keyword search 
    Çetinkaya, Gözde. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2016., 2016.)
    This thesis is motivated by the challange of high computational demand of the dynamic time warping algorithm, which is very prevalent for template based keyword search tasks. The dynamic time warping algorithm su ers from ...
  • Query-by-sing sistem for Turkish sign language broadcasts 
    Kadam, Jülide Gülen. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2019., 2019.)
    Sign based query search system is a specialized type of query by example search system. The main objective of this study is to locate visual query sign from large video dataset. This study is a baseline of a query by sign ...
  • Robust watermarking of compressive sensed measurements under noise attacks 
    Yamaç, Mehmet. (Thesis (M.S.) - Bogazici University. Institute for Graduate Studies in Science and Engineering, 2014., 2014.)
    Traditional methods in data acquisition follow Shannon /Nyquist sampling theorem; one must sample a band-limited signal by at least two times faster than the signal bandwidth to exactly reconstruct the signal. However, ...
  • Searching a website via spoken questions 
    Durukal, Mesut. (Thesis (M.S.)-Bogazici University. Institute for Graduate Studies in Science and Engineering, 2011., 2011.)
    To reach the desired information on a web site can be a very time consuming task when the fact that the site may not even have that information is considered. In addition to the time consuming feature of checking all the ...

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