• Title/Summary/Keyword: Surround

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Geomorphological Environment of Suwon Basin (수원 분지의 지형 환경)

  • Kee, Keun-Doh;Lee, Sang-Whan
    • Journal of the Korean association of regional geographers
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    • v.10 no.2
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    • pp.300-312
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    • 2004
  • The geomorphological environment of Suwon Basin consists of two great elements: mountains which surround the basin and plains and low relief hills by differential erosion of granitic area. Nothern and eastern parts of the basin surround with gneissic mountains(Mt. Kwangkyo), southern and western parts of the basin with granitic mountains(Mt. Chilbo, etc). The basin developed on granitic saprolites is composed of two types of sub-order geomorphic elements: flood plains alongside four river(Whangkuji-chon, Seoho-chon, Suwon-chon, Wonchonri-chon) and aligned hills and mounts between the river side plains. While the low down lands provided the spatial condition for the extention of downtown of Suwon, the gneissic mountains have played the positive roles by high ecological dam effects with stable supply of water and purification of air, etc.

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A Tracking of Head Movement for Stereophonic 3-D Sound (스테레오 입체음향을 위한 머리 움직임 추정)

  • Kim Hyun-Tae;Lee Kwang-Eui;Park Jang-Sik
    • Journal of Korea Multimedia Society
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    • v.8 no.11
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    • pp.1421-1431
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    • 2005
  • There are two methods in 3-D sound reproduction: a surround system, like 3.1 channel method and a binaural system using 2-channel method. The binaural system utilizes the sound localization principle of a human using two ears. Generally, a crosstalk between each channel of 2-channel loudspeaker system should be canceled to produce a natural 3-D sound. To solve this problem, it is necessary to trace a head movement. In this paper, we propose a new algorithm to correctly trace the head movement of a listener. The Proposed algorithm is based on the detection of face and eye. The face detection uses the intensity of an image and the position of eyes is detected by a mathematical morphology. When the head of the listener moves, length of borderline between face area and eyes may change. We use this information to the tracking of head movement. A computer simulation results show That head movement is effectively estimated within +10 margin of error using the proposed algorithm.

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MPEG Audio New Standard: USAC Technology (MPEG 오디오 최신 표준: USAC 기술)

  • Lee, Tae-Jin;Kang, Kyeong-Ok;Kim, Whan-Woo
    • Journal of Broadcast Engineering
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    • v.16 no.5
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    • pp.693-704
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    • 2011
  • As mobile devices become multi-functional, and converge into a single platform, there is a strong need for a codec that is able to provide consistent quality for speech and music contents. MPEG-D USAC standardization activities started at the 82nd MPEG meeting with a CfP and approved Study on DIS at the 96th MPEG meeting. MPEG-D USAC is converged technology of AMR-WB+ and HE-AAC V2. Specifically, USAC utilizes three core codecs (AAC, ACELP, and TCX) for low frequency regions, SBR for high frequency regions, the MPEG Surround for stereo information, and window transition technology for smoothing transition between various core coder. USAC can provide consistent sound quality for both speech and music contents and can be applied to various applications such as multi-media download to mobile devices, digital radio, mobile TV and audio books.

TheTypes and Formative Characteristics of Seon Represented of Costume in the chosun Dynasty (조선시대 복식에 표현된 선의 유형과 조형특성)

  • 옥명선;박옥련;이주영
    • Journal of the Korean Society of Costume
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    • v.53 no.8
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    • pp.39-52
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    • 2003
  • This study was classified according to types added ‘Seon(선)’ to the dress of Chosun Dynasty and analyzed them into formative characteristics. the results were as follows ; 1, ‘Seon’ is divided into three types of the standard, the decoration and the application. According to three types, the types of the standard are subdivided into Jemul Seon(the shape put the right side into lining) and the different color Seon. The types of the decoration are subdivided into Stitch, Surround, Gild and Embroidery form. And the types of the application are subdivided into Piping, Fur, Braid and Metallic form. 2, It showed as the different color Seon and Jemul Seon in the case of men dress and as the different color Seon and Gild form in that of women dress. 3, Its application showed in the ceremonial dress and ‘Po(袍)’ types of men dress and in the ceremonial dress and as accessories of women dress. 4, It was used as complementary color tone in both men and women dress. 5, It was used as its surface in men dress and as its reverse side in women dress according to Seon of style. 6, It was used as ‘Sa(紗)’ in men dress and as ‘Dan(緞)’ in women dress according to Seon of texture. 7, Seon of an aesthetic characteristics was distinguished according to Seon of forms, that is to say, Jemul Seon standed for calm beauty, Two color Seon standed for dynamic beauty, Stitch, Surround and Piping form standed for delicate beauty, Gild and Embroidery form standed for brilliant beauty and Fur, Braid and Metallic form standed for solid beauty.

Improved Synthesis Method of Negative Inter-channel Correlation Parameter Based on Anti-phase Primary Component (반위상 주요성분에 기반을 둔 개선된 음수 채널간 상관도 파라미터 합성 기법)

  • Hyun, Dong-Il;Lee, Seok-Pil;Park, Young-Cheol;Youn, Dae-Hee
    • The Journal of the Acoustical Society of Korea
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    • v.31 no.6
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    • pp.410-418
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    • 2012
  • Parametric stereo(PS) and MPEG surround(MPS) are major spatial audio coding(SAC) tools. In this paper, the problem of the inter-channel correlation(ICC) synthesis in the conventional SAC is analyzed. Conventional methods assume that ambient components mixed to two output channels are anti-phased, while the primary components are assumed to be in-phased. This assumption can cause excessive ambient mixing for a negative-valued ICC. As a remedy to this problem, we propose a new ICC synthesis method based on an assumption that the primary components are anti-phased each other for a negative ICC. The proposed method is also applied to the approximation which works in practice. The performance of the proposed method was evaluated by computer simulations and the subjective listening tests verified that the proposed method is effective in not only headphones but also loudspeakers playback.

Environmental survey on the vectors and hosts of Tsutsugamushi disease in Jeonnam province, Korea (전남지방에서 쯔쯔가무시병 숙주와 매개체의 서식환경 조사)

  • Song, Hyeon-Je
    • Korean Journal of Veterinary Service
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    • v.35 no.3
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    • pp.183-189
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    • 2012
  • Tsutsugamushi disease or scrub typhus cause by Orientia tsutsugamushi is an endemic disease in Korea. Chigger mites and field rodents play roles in transmission of the disease by the vector and host of the agent. The purpose of this study is to investigate the density of the chigger mites and field rodents due to environmental factors such as temperature, relative humidity, soil thickness and the various vegetations to the 9 field rodent collection sites. The total 62 field rodents was captured by the Sherman collapsible traps from April to October 2009 at the Jangseong of Jeonnam Province, Korea. The trapping rate of the field rodents by the different collecting sites was dominant at subside storage water (24%), bush near by dam (22%), bank around field (20%), followed by 18% of grassy field and surround cattle shed. The distribution of chigger mites by the different collecting sites was the highest at Bush near by dam (28.7%). And the sites of subside storage water, bank around field and surround cattle shed were 20.4%, 18.8%, 16.4%, respectively. On the other hand the collecting sites of stream bank and ridges between rice paddies were not collected. The temperature to the collecting sites was showed $24.1^{\circ}C$ in June and $24.2^{\circ}C$ in October which was higher than April ($10.6^{\circ}C$), whereas lower than May ($25.3^{\circ}C$) and September ($26.8^{\circ}C$). The highest number of mites was collected at $24.2^{\circ}C$ and 46.6% relative humidity in October. The chigger mites and field rodents were highly collected between 18 and 24% at the sites where are loosely in the superficial layers of the soil from 8.0 cm to 10.2 cm. Total 25 species of vegetation were distributed at the collecting sites. In the present study, strong evidence was found that bank around field and grassy field were provided for the prevalence sites of tsutsugamushi disease.

On an Adaptation of Announcement Sound Level in White Noise Environment (백색소음 환경에서 음성안내레벨 적응에 관한 연구)

  • Yun, Jong-Jin;Bae, Myung-Jin
    • Journal of the Institute of Electronics Engineers of Korea SP
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    • v.49 no.1
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    • pp.112-118
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    • 2012
  • In daily life, there are many information broadcasting by using voice information systems. If surrounding noises are mixed with the information signals, the clarity of the signal become down graded too much to understand. Surrounding noises are not uniformed, but very irregular signals always changing. Therefore, it is very hard to control the output signals along with the irregular signals. This paper suggests a method to change the level of the voice information adapting to the surround noise in the white noise environment. The surround noise level is measured by subtracting the stored output voice signal from the voice signal degraded by the noise. The noise is used to estimation of SNR. And, the method to change the output level of voice signal adapting to the noise level. The suggested adaptive voice information system has the advantage to improve listeners' speech perception and to use amplifier's energy effectively.

Design criteria for birdstrike damage on windshield

  • Marulo, Francesco;Guida, Michele
    • Advances in aircraft and spacecraft science
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    • v.1 no.2
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    • pp.233-251
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    • 2014
  • Each aircraft have to be certified for a specified level of impact energy, for assuring the capability of a safe flight and landing after the impact against a bird at cruise speed. The aim of this research work was to define a scientific and methodological approach to the study of the birdstrike phenomenon against several windshield geometries. A series of numerical simulations have been performed using the explicit finite element solver code LS-Dyna, in order to estimate the windshield-surround structure capability to absorb the bird impact energy, safely and efficiently, according to EASA Certification Specifications 25.631 (2011). The research considers the results obtained about a parametric numerical analysis of a simplified, but realistic, square flat windshield model, as reported in the last work (Grimaldi et al. 2013), where this model was subjected to the impact of a 1.8 kg bird model at 155 m/s to estimate the sensitivity of the target geometry, the impact angle, and the plate curvature on the impact response of the windshield structure. Then on the basis of these results in this paper the topic is focused about the development of a numerical simulation on a complete aircraft windshield-surround model with an innovative configuration. Both simulations have used a FE-SPH coupled approach for the fluid-structure interaction. The main achievement of this research has been the collection of analysis and results obtained on both simplified realistic and complete model analysis, addressed to approach with gained confidence the birdstrike problem. Guidelines for setting up a certification test, together with a design proposal for a test article are an important result of such simulations.

MPEG-D USAC: Unified Speech and Audio Coding Technology (MPEG-D USAC: 통합 음성 오디오 부호화 기술)

  • Lee, Tae-Jin;Kang, Kyeong-Ok;Kim, Whan-Woo
    • The Journal of the Acoustical Society of Korea
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    • v.28 no.7
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    • pp.589-598
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    • 2009
  • As mobile devices become multi-functional, and converge into a single platform, there is a strong need for a codec that is able to provide consistent quality for speech and music content MPEG-D USAC standardization activities started at the 82nd MPEG meeting with a CfP and approved WD3 at the 88th MPEG meeting. MPEG-D USAC is converged technology of AMR-WB+ and HE-AAC V2. Specifically, USAC utilizes three core codecs (AAC ACELP and TCX) for low frequency regions, SBR for high frequency regions and the MPEG Surround tool for stereo information. USAC can provide consistent sound quality for both speech and music content and can be applied to various applications such as multi-media download to mobile device Digital radio Mobile TV and audio books.

A Saliency-Based Focusing Region Selection Method for Robust Auto-Focusing

  • Jeon, Jaehwan;Cho, Changhun;Paik, Joonki
    • IEIE Transactions on Smart Processing and Computing
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    • v.1 no.3
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    • pp.133-142
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    • 2012
  • This paper presents a salient region detection algorithm for auto-focusing based on the characteristics of a human's visual attention. To describe the saliency at the local, regional, and global levels, this paper proposes a set of novel features including multi-scale local contrast, variance, center-surround entropy, and closeness to the center. Those features are then prioritized to produce a saliency map. The major advantage of the proposed approach is twofold; i) robustness to changes in focus and ii) low computational complexity. The experimental results showed that the proposed method outperforms the existing low-level feature-based methods in the sense of both robustness and accuracy for auto-focusing.

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