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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korea Multimedia Society
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Korea Multimedia Society
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Volume & Issues
Volume 16, Issue 12 - Dec 2013
Volume 16, Issue 11 - Nov 2013
Volume 16, Issue 10 - Oct 2013
Volume 16, Issue 9 - Sep 2013
Volume 16, Issue 8 - Aug 2013
Volume 16, Issue 7 - Jul 2013
Volume 16, Issue 6 - Jun 2013
Volume 16, Issue 5 - May 2013
Volume 16, Issue 4 - Apr 2013
Volume 16, Issue 3 - Mar 2013
Volume 16, Issue 2 - Feb 2013
Volume 16, Issue 1 - Jan 2013
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Recognition Performance Improvement for Noisy-speech by Parallel Model Compensation Adaptation Using Frequency-variant added with ML
Choi, Sook-Nam ; Chung, Hyun-Yeol ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 905~913
DOI : 10.9717/kmms.2013.16.8.905
The Parallel Model Compensation Using Frequency-variant: FV-PMC for noise-robust speech recognition is a method to classify the noises, which are expected to be intermixed with input speech when recognized, into several groups of noises by setting average frequency variant as a threshold value; and to recognize the noises depending on the classified groups. This demonstrates the excellent performance considering noisy speech categorized as good using the standard threshold value. However, it also holds a problem to decrease the average speech recognition rate with regard to unclassified noisy speech, for it conducts the process of speech recognition, combined with noiseless model as in the existing PMC. To solve this problem, this paper suggests a enhanced method of recognition to prevent the unclassified through improving the extent of rating scales with use of maximum likelihood so that the noise groups, including input noisy speech, can be classified into more specific groups, which leads to improvement of the recognition rate. The findings from recognition experiments using Aurora 2.0 database showed the improved results compared with those from the method of the previous FV-PMC.
Feature Extraction System for High-Speed Fingerprint Recognition using the Multi-Access Memory System
Park, Jong Seon ; Kim, Jea Hee ; Ko, Kyung-Sik ; Park, Jong Won ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 914~926
DOI : 10.9717/kmms.2013.16.8.914
Among the recent security systems, security system with fingerprint recognition gets many people`s interests through the strengths such as exclusiveness, convenience, etc, in comparison with other security systems. The most important matters for fingerprint recognition system are reliability of matching between the fingerprint in database and user`s fingerprint and rapid process of image processing algorithms used for fingerprint recognition. The existing fingerprint recognition system reduces the processing time by removing some processes in the feature extraction algorithms but has weakness of a reliability. This paper realizes the fingerprint recognition algorithm using MAMS(Multi-Access Memory System) for both the rapid processing time and the reliability in feature extraction and matching accuracy. Reliability of this process is verified by the correlation between serial processor`s results and MAMS-PP64`s results. The performance of the method using MAMS-PP64 is 1.56 times faster than compared serial processor.
Face Detection Algorithm Using Color Distribution Matching
Kwon, Seong-Geun ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 927~933
DOI : 10.9717/kmms.2013.16.8.927
Face detection algorithm of OpenCV recognizes the faces by Haar matching between input image and Haar features which are learned through a set of training images consisting of many front faces. Therefore the face detection method by Haar matching yields a high face detection rate for the front faces but not in the case of the pan and deformed faces. On the assumption that distributional characteristics of color histogram is similar even if deformed or side faces, a face detection method using the histogram pattern matching is proposed in this paper. In the case of the missed detection and false detection caused by Haar matching, the proposed face detection algorithm applies the histogram pattern matching with the correct detected face area of the previous frame so that the face region with the most similar histogram distribution is determined. The experiment for evaluating the face detection performance reveals that the face detection rate was enhanced about 8% than the conventional method.
An Objective Image Quality Measurement Considering Skipped & Estimated Positions of Pixels in Image Scaling
Kim, Won-Hee ; Moon, Kwang-Seok ; Kim, Jong-Nam ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 934~942
DOI : 10.9717/kmms.2013.16.8.934
Image scaling is used for a variety of real-life applications. In order to evaluate the performance of transform functions, the image quality are compared together before and after processing. For the objective evaluation of the transform functions, the exact criterion of image quality is required, and various aspects approaches are practically performed. However, few researches have been conducted on image quality measurement considering the position of pixels that are skipped or newly generated in the process of the image scaling. Therefore this paper focuses on the objective image quality measurement for positions of skipped or estimated pixels in the image scaling. The proposed method generated new image quality measure considering the positional changes using a conventional measure and evaluated sensitivity about positional changes. Through this experiments, it is observed that conventional image quality measurement is definitely affected by positional changes of a skipped and estimated pixels. It is also confirmed that the proposed method is an objective criterion to represent image quality for positional changes of skipped or estimated pixels. The proposed method can be used as a criterion to evaluate the performance of image restoration or enhancement functions.
A Study on Improvement of AODV for Hybrid Wireless Mesh Networks
Kim, Ho-Cheal ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 943~953
DOI : 10.9717/kmms.2013.16.8.943
By the enormous increase in mobile nodes and diverse service requests on wireless networks, wireless mesh network(WMN) takes an interest as the solution for such requests. However, lots of issues which should be solved to deploy WMN are still remained. In the network layer, the performance improvement of routing protocols is the major issue of nowadays researches. WMN can be easily deployed by use of protocols for mobile ad-hoc networks(MANET) because it is much similar with MANET in multi-hop wireless routing and which node plays as host and router concurrently. Unfortunately, most routing protocols for MANET have drawbacks such as large traffic overhead and long delay time for route discovery due to the network extension. They are major factors of performance degradation of WMN and most researches are focused on them. In this paper, domain-based AODV which is amended AODV to be applied in hybrid WMN is proposed. The proposed scheme divides a hybrid WMN as several domains and performs route discovery by header layer domain. Therefore it can reduce the distance for route discovery as much as average hop count between domain header and member nodes. From the simulation, domain-based AODV was showed slowly increasing delay time due to the network extension.
A Study on Countermeasure for CCN Interest Flooding Attack
Kim, DaeYoub ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 954~961
DOI : 10.9717/kmms.2013.16.8.954
To enhance the efficiency of network, content-centric networking (CCN), one of future Internet architectures, allows network nodes to temporally cache transmitted contents and then to directly respond to request messages which are relevant to previously cached contents. Also, since CCN uses a hierarchical content-name, not a host identity like source/destination IP address, for request/response packet routing and CCN request message does not include requester`s information for privacy protection, contents-providers/ network nodes can not identify practical requesters sending request messages. So to send back relevant contents, network nodes in CCN records both a request message and its incoming interfaces on Pending Interest Table (PIT). Then the devices refer PIT to return back a response message. If PIT is exhausted, the device can not normally handle request/response messages anymore. Hence, it is needed to detect/react attack to exhaust PIT. Hence, in this paper, we propose improved detection/reaction schemes against attacks to exhaust PIT. In practice, for fine-grained control, this proposal is applied to each incoming interface. Also, we propose the message framework to control attack traffic and evaluate the performance of our proposal.
Smart-clothes System for Realtime Privacy Monitoring on Smart-phones
Park, Hyun-Moon ; Jeon, Byung-Chan ; Park, Won-Ki ; Park, Soo-Hyun ; Lee, Sung-Chul ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 962~971
DOI : 10.9717/kmms.2013.16.8.962
In this paper, we propose a method to infer the user`s behavior and situation through collected data from multi-sensor equipped with a smart clothing and it was implemented as a smart-phone App. This smart-clothes is able to monitor wearer users` health condition and activity levels through the gyro, temp and acceleration sensor. Sensed vital signs are transmitted to a bluetooth-enabled smart-phone in the smart-clothes. Thus, users are able to have real time information about their user condition, including activities level on the smart-application. User context reasoning and behavior determine is very difficult using multi-sensor depending on the measured value of the sensor varies from environmental noise. So, the reasoning and the digital filter algorithms to determine user behavior reducing noise and are required. In this paper, we used Multi-black Filter and SVM processing behavior for 3-axis value as a representative value of one.
The Direction of Improvement Non-linear Editing Software
Park, Sung-Dae ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 972~981
DOI : 10.9717/kmms.2013.16.8.972
Non-linear editing is an editing method that, unlike linear editing, enables users to insert a new frame between existing frames. Non-linear editing systems are systems that support such method, and are composed of a computer, a software and a capture board that inputs/outputs video signals. Non-linear editing is used for modern television broadcasts and movie productions. Recorded footage and various graphic sources are combined into one visual content through a non-linear editing system. In this paper, we will look into functions of various non-linear editing softwares (mainly the most common of all; Adobe Premiere) as well as their merits and demerits during the editing process, and will also discuss their future Improvement direction.
An Empirical Research on Success Factors of One-person Creating Company of Mobile App Industry in the Busan Region
Cheon, Phyeong-Uk ; Chung, Dong-Seop ; Ock, Young-Seck ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 982~993
DOI : 10.9717/kmms.2013.16.8.982
Currency crisis, in order to solve the problem of the polarization of economic and serious youth unemployment rate, to prepare for the smart new economic era, and like to support and nurture the one-persion creating company of mobile app industry of central and local government people policies are underway. To be able to contribute to the establishment of the success of mobile app One-person creating company, to target the mobile app One-person creating company int the Busan region, we conducted an empirical study of success factors, and thus, support these solutions, more effective and efficient in an attempt to try to seek the support measures, was carried out this research. In this study, results derive a research three hypotheses about the success factors of One-person creating company through literature discussion, were investigated on the basis of empirical data of the mobile app one-persion creative company of Busan region of 51 individual, establishment of company period is longer, the number of organizations employee is large and attract a lot of external funds, and was able to find the tendency of more entrepreneurs receives an education, may increase an outcome of business. In this study, it is possible to obtain the policy implications as follows. First, to attract investment funds and attract government funding to support the funding of One-person creating company, it is necessary to pay attention more. Second, policy founder to an education about the management on an ongoing basis is needed than the education of marketing and technology for human resources development. Future, you will be able to expand across the country study company, we have established a policy of mobile app industry of national dimension, in this foundation, will be expanded to all industries.
A Study on the Technique of the 3D Stereoscopic Cinema
Kim, Byeong-Cheol ;
Journal of Korea Multimedia Society, volume 16, issue 8, 2013, Pages 994~1004
DOI : 10.9717/kmms.2013.16.8.994
3D stereoscopic cinema emerged as a new dominant media format. In principle, the stereoscopic cinema imitate the vision of the human being has two eyes. The stereoscopic cinema is filmed with 2 connected cameras at the same time and projected these 2 different images. With the stereoscopic glasses, the human being can see the overlapped images as a single 3D stereoscopic image. To make 3D stereoscopic cinema, it is very important to systemize the process of the 3D stereoscopic cinema production and to use the principle of the 3D stereoscopic cinema. This paper investigates the possibilities of the using the 3D stereoscopic principles such as the I.O.D, convergence point, parallax and the 3D comfort zone. Using the principle of the 3D stereoscopic cinema can be the technique of directing the film. Using the example of 3D stereoscopic short film My Birthday, I investigate the main technique of the 3D stereoscopic cinema.