• Proceedings of the Korea Contents Association Conference
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• 2006.11a
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• pp.21-25
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• 2006

As the mobile computing technologies rapidly develops, the mobile phones are evolving into smart phones capable of higher performance. However, it is inevitable that the mobile phones have limited input/output functions in order to maintain the current portability. Because of the limited input and output, the mobile user interfaces currently adopt the inefficient structures based on sequential search and selection. In this paper, an intelligent and adaptive user interface techniques are proposed in order to surmount the current inefficiency of the static interface and to maximize the user convenience. The proposed techniques, based on the users' previous tasks, automatically generate an intelligent and adaptive user interface in order to make users efficiently utilize the mobile services.

• The Journal of the Korea Contents Association
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• v.16 no.12
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• pp.19-26
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• 2016

Among the various services for mobile banking, user authentication method using bank security card is still very useful. We can use mobile banking easily and safely in case of saving encoded security codes in smart phone and entering codes automatically whenever user authentication is required without bank security card. In this paper automatic recognition algorithm of security codes of bank security card is proposed in oder to enroll the encoded security codes into smart phone using smart phone camera. Advanced adaptive binarization is used for extracting digit segments from various background image pattern and adaptive 2-dimensional layout analysis method is developed for segmentation and recognition of damaged or touched digits. Experimental results of proposed algorithm using Android and iPhone, show excellent security code recognition results.

• Journal of Broadcast Engineering
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• v.27 no.4
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• pp.548-560
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• 2022

Video based Point Cloud Compression (V-PCC) is one of the compression methods for compressing point clouds, and shows high efficiency in dynamic point cloud compression with movement due to the feature of compressing point cloud data using an existing video codec. Accordingly, V-PCC is drawing attention as a core technology for immersive content services such as AR/VR. In order to effectively service these V-PCC contents through a media streaming platform, it is necessary to encapsulate them in the existing media file format, ISO based Media File Format (ISOBMFF). However, in order to service through an adaptive streaming platform such as Dynamic Adaptive Streaming over HTTP (DASH), it is necessary to encode V-PCC contents of various qualities and store them in the server. Due to the size of the 2D media, it causes a great burden on the encoder and the server compared to the existing 2D media. As a method to solve such a problem, it may be considered to configure a streaming platform based on content obtained through V-PCC content encoding based on SHVC. Therefore, this paper encapsulates the SHVC-based V-PCC bitstream into ISOBMFF suitable for DASH service and proposes a configuration method to service it. In addition, in this paper, we propose ISOBMFF encapsulation and DASH configuration method to effectively service SHVC-based V-PCC contents, and confirm them through verification experiments.

• Proceedings of the Korea Information Processing Society Conference
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• 2006.05a
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• pp.493-496
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• 2006

유비쿼터스 프로파일은 유비쿼터스 환경에서 콘텐츠 적응화를 위해 CC/PP를 확장한 프로파일로서, 프로파일을 구성하는 정보들은 네트워크에 분산되어 존재하며, 생성 시 게이트웨이의 프로파일 관리 저장소에서 통합되게 된다. 이와 같이 프로파일들이 네트워크에 분산되어 존재하기 때문에 통합 및 관리에 어려움을 가지고 있다. 본 논문에서는 효율적인 유비쿼터스 프로파일들을 통합 운영할 수 있는 프레임워크를 설계한다. 제안한 프레임워크는 프로파일 운영 아키텍쳐와 프로파일 처리 기능을 중심으로 설계하였으며, 통합 및 관리를 할 수 있는 기능을 포함하고 있다. 프레임워크는 운영되는 장소에 따라 클라이언트 프레임워크(CF), 유비쿼터스 프레임워크(UF), 저장소 프레임워크(RF)로 구분되며, 특성에 맞는 기능을 가지고 있다. 제안된 프레임워크는 프로파일 생성, 전송, 통합 관리 기능을 가지고 있어, 유비쿼터스 프로파일 운용 시스템 구축에 효율적이다.

• The Journal of the Korea Contents Association
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• v.12 no.11
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• pp.1-8
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• 2012

The application of object recognition technology has been increased with a growing need to introduce automated system in industry. However, object transformed by noises and shadows appeared from illumination causes challenge problem in object detection and recognition. In this paper, an illumination invariant object detection using a DoG filter and adaptive threshold is proposed that reduces noises and shadows effects and reserves geometry features of object. And also, rotation invariant object recognition is proposed that has trained with neural network using classes categorized by object type and rotation angle. The simulation has been processed to evaluate feasibility of the proposed method that shows the accuracy of 99.86% and the matching speed of 0.03 seconds on ETRI database, which has 16,848 object images that has obtained in various lighting environment.

• The Journal of the Korea Contents Association
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• v.6 no.12
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• pp.89-95
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• 2006

The performance of blind source separation(BSS) using independent component analysis (ICA) declines significantly in a reverberant environment. A post-processing method proposed in this paper was designed to remove the residual component precisely. The proposed method used modified NLMS(normalized least mean square) filter in frequency domain, to estimate cross-talk path that causes residual cross-talk components. Residual cross-talk components in one channel is correspond to direct components in another channel. Therefore, we can estimate cross-talk path using another channel input signals from adaptive filter. Step size is normalized by input signal power in conventional NLMS filter, but it is normalized by sum of input signal power and error signal power in modified NLMS filter. By using this method, we can prevent misadjustment of filter weights. The estimated residual cross-talk components are subtracted by non-stationary spectral subtraction. The computer simulation results using speech signals show that the proposed method improves the noise reduction ratio(NRR) by approximately 3dB on conventional FDICA.

• Proceedings of the Korea Contents Association Conference
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• 2015.05a
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• pp.255-256
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• 2015

한국과 일본은 사회문화적 환경이 지구상에서 가장 유사하며, 근접한 국가이다. 특히, 두나라는 공통적으로 고령화의 진전속도가 매우 급속히 이루어졌으며, 국가적으로도 유사한 형태로 진행되어 왔다. 본 연구는 시대적 요청에 의해 인접한 두 국가의 다양한 고령기 대책을 마련하기 위한 전략모색과 초고령 한국사회에 대비하여 노인문제를 앞서 경험한 일본의 시사점을 통하여 대응방안의 기초를 마련하고자 한다. 본 연구는 한국과 일본 두 국가에서 각각 노인복지관, 시니어클럽, 고령자봉사센터 등을 통하여 양국가의 언어로 번역된 설문지조사로 실시되었다. 본 연구를 토대로 고령사회는<얼마나 오래사느냐>가 아니라, <어떻게 잘 사느냐>에 초점을 두고, 인간의 행복과 존엄의 가치에 입각하여 미래사회의 성장잠재력, 세대간의 조화, 성공적 노화적응에 준비하고자 한다.

• The Journal of the Korea Contents Association
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• v.4 no.4
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• pp.65-70
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• 2004

In this paper, I propose a new extraction method of Individual Pitch Pulse in order to accommodate the changes in each pitch interval and reduce pitch errors in Speech Coding. The extraction rate of individual pitch pulses was $96\%$ for male voice and $85\%$ for female voice respectively. This method has the capability of being applied to many fields, such as speech coding, speech analysis, speech synthesis and speech recognition.

• The Journal of the Korea Contents Association
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• v.6 no.2
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• pp.59-64
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• 2006

In this paper, 1 propose a new method of Multi-Pulse Coding(IP-MPC) use individual pitch pulses in order to accommodate the changes in each pitch interval and reduce pitch errors. The extraction rate of individual pitch pulses was $85\%$ for female voice and $96\%$ for male voice respectively, 1 evaluate the MPC by using pitch information of autocorrelation method and the IP-MPC by using individual pitch pulses. As a result, 1 knew that synthesis speech of the IP-MPC was better in speech quality than synthesis speech of the MPC.

• Proceedings of the Korea Contents Association Conference
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• 2012.05a
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• pp.169.1-169.1
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• 2012

최근 높은 관심과 기술적 이슈를 끌어내고 있는 빅 데이터는 과학기술 분야에도 무수히 존재한다. 위성사진, 동영상을 비롯하여 링크드 데이터 (Linked Data)에 이르기까지 데이터 유형과 무관하게 처리해야 할 대상은 계속 늘어가고 있는 실정이다. 최근 몇 년동안 과학기술 문헌을 대상으로 시맨틱 기술과 자연어처리 기술을 이용하여 기술 동향을 분석하고 예측하는 연구를 수행해 온 KISTI는 빅 데이터 환경에 맞추어 분석 플랫폼을 분산/병렬화하는 동시에 모바일 서비스 플랫폼을 통해 신속한 의사 결정을 지원하는 전략을 취하고 있다. 또한, 법무부, 국방기술품질원, 관세청에 적용한 분석 기술을 더욱 고도화하여 사용자 적응형 가이드 서비스를 개발하고 이를 통해 연구 개발 전략 수립을 실제적으로 지원할 수 있도록 노력하고 있다.