Eun-Seo Lee

Chung-Ang University, Sŏul, Seoul, South Korea

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Publications (7)1.53 Total impact

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    ABSTRACT: Interoperability is one of the fundamental functions of a home network because such networks must support many different types of devices and services. Interoperability can be realized by converting messages among different middleware with rules. However, it is very difficult to define common rules to accommodate all differences among various middleware. In addition, most interoperability approaches only address the conversion of the message format and schema, and occasionally these are not enough for a semantic conversion. In this paper, we propose a systematic approach to solve the interoperability problem. For this, we classify three interoperability types, i.e., schema, profile, and procedure, and define the rules for each type. We called this interoperability scheme the Multiple stage Approach for Home network Interoperability (MAHI). In this paper, we present the design and implementation of MAHI for a three-stage conversion process. Finally, we illustrate some experimental and quantitative results. In the experiments, MAHI can provide efficient interoperability among different middleware and MAHI will be a method to deal with a complex home network interoperability.
    No preview · Article · Dec 2014 · IEICE Transactions on Communications
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    ABSTRACT: An MPEG-2 AAC Huffman decoding method based on the fixed length compacted codeword tables, where each codeword can contain multiple number of Huffman codes, was proposed. The proposed method enhances the searching efficiency by finding multiple symbols in a single search, i.e., a direct memory reading of the compacted codeword table. The memory usage is significantly saved by separately handling the Huffman codes that exceed the length of the compacted codewords. The trade-off relation between the computational complexity and the amount of memory usage was analytically derived to find the proper codeword length of the compacted codewords for the design of MPEG-2 AAC decoder. To validate the proposed algorithm, its performance was experimentally evaluated with an implemented MPEG-2 AAC decoder. The results showed that the computational complexity of the proposed method is reduced to 54% of that of the most up-to-date method.
    No preview · Article · Jul 2014 · Journal of Electrical Engineering and Technology
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    Eun-Seo Lee · Hark-Jin Lee · Kwangil Lee · Jun-Hee Park
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    ABSTRACT: Home appliance manufacturers have recently been trying to provide smart products capable of various Internet services. For example, one health care manufacturer provides a Wi-Fi-capable scale. Once users register their information with the manufacturer's server, their weight and body fat records are automatically uploaded to the server whenever they measure their weight. The users can then watch and check their weight log easily using a smart device, such as a smartphone or tablet. One of the biggest problems, however, is that the initial configuration of the appliances and the user registration process may be quite complicated to typical users who are unfamiliar with such IT devices. This paper proposes an autoconfiguration system structure and protocol for Internet-capable home appliances, which supports the initial configuration and remote maintenance service of the device with only little user effort. Manufacturers can develop their own information appliances and provide differentiated services using the proposed system and protocol.
    Preview · Article · Dec 2013 · Etri Journal
  • Eun-Seo Lee · Jae-Sik Lee · Kyou-Jung Son · Tae-gyu Chang
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    ABSTRACT: This paper proposes a new MPEG-2 AAC Huffman decoding algorithm which is designed to find multiple symbols in a single search. The analysis and experimental results show that the computational complexity of the proposed method is lower by more than 46% when compared with those of the up-to-date methods.
    No preview · Conference Paper · Jan 2013
  • Eun-Seo Lee · O. Urhan · Tae-Gyu Chang
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    ABSTRACT: Combination of multiplication-free one-bit transform based block estimation with the diamond sparse search pattern is presented is this paper. Unification of sparse search patterns with low-bit representation motion estimation methods are rarely investigated and therefore one-bit transform based approaches are executed using full-search approach mostly. Our experiments show that such a combination can be carried out with acceptable performance fall.
    No preview · Conference Paper · Jul 2007
  • Hwa-Yong Oh · Eun-Seo Lee · Dong-Hwan Kim · Tea-Gyu Chang
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    ABSTRACT: This paper describes a digital convergence platform (DCP), which is implemented based on the MPEG-21 multimedia framework. The DCP is a newly proposed solution in this research for the convergence service of future home multimedia environment. The DCP is a common platform designed to have the feature of configurability, via means of S/W, which is needed for the convergence service of diverse digital media. A distributed peer to peer service and transaction model is also a new feature realized in the DCP using the MPEG-21 multimedia framework. A prototype DCP is implemented to verify its functions of multimedia service and transactions. The developed DCPs are networked with IP clustering storage systems for the distributed service of multimedia. Successful streaming services of the MPEG-2/4 video and audio are verified with the implemented test-bed system of the DCP.
    No preview · Conference Paper · Feb 2006
  • Byoung-Il Kim · Eun-Seo Lee · Tae-Gyu Chang
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    ABSTRACT: This work presents a new structure of MPEG-4 AAC encoder. The proposed encoder directly shapes quantization noise distribution according to the energy distribution and thereafter performs adjustment of the offset level of the noise distribution to meet the target bit rate. The direct noise shaping and the bit rate matching scheme significantly alleviate the problem of processing burden of the conventional encoder related with the precise modeling of the psychoacoustics and iteration intensive quantization.
    No preview · Conference Paper · Feb 2005