The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Jilei Tian - One of the best experts on this subject based on the ideXlab platform.
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speaker and language independent speech recognition in Mobile Communication systems
International Conference on Acoustics Speech and Signal Processing, 2001Co-Authors: I Viikki, Imre Kiss, Jilei TianAbstract:We investigate the technical challenges that are faced when making a transition from the speaker-dependent to speaker-independent speech recognition technology in Mobile Communication devices. Due to globalization as well as the international nature of the markets and the future applications, speaker independence implies the development and use of language-independent automatic speech recognition (ASR) to avoid logistic difficulties. We propose an architecture for embedded multilingual speech recognition systems. Multilingual acoustic modeling, automatic language identification, and on-line pronunciation modeling are the key features which enable the creation of truly language- and speaker-independent ASR applications with dynamic vocabularies and sparse implementation resources. Our experimental results confirm the viability of the proposed architecture. While the use of multilingual acoustic models degrades the recognition rates only marginally, a recognition accuracy decrease of approximately 4% is observed due to sub-optimal on-line text-to-phoneme mapping and automatic language identification. This performance loss can nevertheless be compensated by applying acoustic model adaptation techniques.
Changseop Park - One of the best experts on this subject based on the ideXlab platform.
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on certificate based security protocols for wireless Mobile Communication systems
IEEE Network, 1997Co-Authors: Changseop ParkAbstract:Mutual authentication and session key exchange protocols based on certificates for the wireless Mobile Communication/computing system are proposed. First, two improved versions for the conventional certificate-based systems are proposed, and an offline authentication mechanism based on the dynamic certificate is introduced. Then, an end-to-end internetwork-authenticated session key exchange protocol, which preserves a private Communication between two Mobile users, is finally proposed. In designing the security protocols proposed, the low computational power of the Mobile stations and the low bandwidth of the wireless networks are considered.
I Viikki - One of the best experts on this subject based on the ideXlab platform.
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speaker and language independent speech recognition in Mobile Communication systems
International Conference on Acoustics Speech and Signal Processing, 2001Co-Authors: I Viikki, Imre Kiss, Jilei TianAbstract:We investigate the technical challenges that are faced when making a transition from the speaker-dependent to speaker-independent speech recognition technology in Mobile Communication devices. Due to globalization as well as the international nature of the markets and the future applications, speaker independence implies the development and use of language-independent automatic speech recognition (ASR) to avoid logistic difficulties. We propose an architecture for embedded multilingual speech recognition systems. Multilingual acoustic modeling, automatic language identification, and on-line pronunciation modeling are the key features which enable the creation of truly language- and speaker-independent ASR applications with dynamic vocabularies and sparse implementation resources. Our experimental results confirm the viability of the proposed architecture. While the use of multilingual acoustic models degrades the recognition rates only marginally, a recognition accuracy decrease of approximately 4% is observed due to sub-optimal on-line text-to-phoneme mapping and automatic language identification. This performance loss can nevertheless be compensated by applying acoustic model adaptation techniques.
Jussi Turtiainen - One of the best experts on this subject based on the ideXlab platform.
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Mobile Communication as a social stage meanings of Mobile Communication in everyday life among teenagers in finland
New Media & Society, 2004Co-Authors: Virpi Oksman, Jussi TurtiainenAbstract:The spread of Mobile Communication among Finnish teenagers has been markedly rapid during the latter half of the 1990s. Young people have created and developed a Communication culture that incorporates many special features, such as a rise in the use of text-based Communication channels. Teenagers’ intersecting and selective use of Communication channels has generated multimedial Communication. From the theoretical standpoint provided by symbolic interactionism, we can ask whether Communication through new media technologies generates new forms of social interaction. If this is the case, how could we describe and analyse these new forms of interaction? The media landscapes created by teenagers serve to articulate their personal space, as well as enabling their presentation of self and defining their relationships to others. This article is based on thematic interview material, and its purpose is to analyse the meanings and use contexts of Mobile Communication and other multimedial Communication culture am...
Takehiro Nakamura - One of the best experts on this subject based on the ideXlab platform.
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wideband cdma radio control techniques for third generation Mobile Communication systems
Vehicular Technology Conference, 1997Co-Authors: S Onoe, K Ohno, K Yamagata, Takehiro NakamuraAbstract:The general requirements for the third-generation Mobile Communication system are to be markedly superior to second-generation systems in terms of services that can be provided and system economy. The wideband-CDMA (W-CDMA) system is a strong candidate for the radio access of the third-generation system. We describe a design approach that makes the most of the merits of W-CDMA, propose radio transmission and system control techniques, and present a performance evaluation of the individual techniques.
