• Title/Summary/Keyword: Contents Transmission

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A Design and Implementation of Multimedia Contents Services System Using ZigBee in Ubiquitous Environment (유비쿼터스 환경에서 ZigBee를 이용한 멀티미디어 컨텐츠 서비스 시스템 설계 및 구현)

  • Kim, Min-Sung;Chung, Yeong-Jee
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2009.10a
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    • pp.1014-1017
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    • 2009
  • Ubiquitous makes it possible to expand a short-distant wireless communications infra and provide various services. Especially, it is very important to develop multimedia contents service technology through ZigBee and WPAN technology. But because the data transmission rate of IEEE 802.15.4 Standard ZigBee is low, there are many barriers for multimedia contents services. In this paper, to improve ZigBee that has the limitation of transmission rate in IEEE 802.15.4 Standard, an upgraded model to 1Mbps through MAC Layer remodeling is designed. And Zigbee-based broadcasting multimedia contents services system is designed and implementation to provide the service in Ubiquitous environment.

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An Efficient Transmission Method of Panoramic Multimedia Contents in a Limited Bandwidth Environment (제한적 네트워크 환경 하에서 효율적인 파노라마식 멀티미디어 콘텐츠 분할 전송 방법)

  • Kim, Byung-Chul;Lee, Gun-Hee;Lee, In-Jae;Kim, Kyu-Heon
    • Journal of Broadcast Engineering
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    • v.16 no.5
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    • pp.811-823
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    • 2011
  • This paper proposes an efficient transmission method for the panoramic multimedia contents. The panoramic video provides wide sight and various view-point to the user. The traditional methods of the panoramic multimedia content transmission has several limitations, as follow; A client suffers a long initial delay time to play a panoramic video when it is transmitted through a limited bandwidth network, because the panoramic video has larger data size than a general video. And if a client's display device has limited resolution, such as mobile phone, laptop PC monitor, etc. it can not display the entire panoramic video that has a wide view video sequence. So, in order to overcome the obstacles, this paper proposes an efficient transmission of panoramic multimedia contents. This method will increase the transmission efficiency throughout the technique of the scene description in MPEG-4 system. Also we demonstrated the efficiency of the proposed method by comparison with existing methods.

A Study on the Joint-modulation CDMA System for Efficient Streaming Transmission (효율적인 스트리밍 전송을 위한 합성변조 CDMA 시스템에 관한 연구)

  • Lee Yang-Sun;Kang Heau-Jo
    • Journal of Digital Contents Society
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    • v.6 no.4
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    • pp.243-248
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    • 2005
  • In this paper, We proposed joint-modulation CDMA system for efficient streaming transmission. and, We analyzed joint-modulation CDMA system using nakagami fading model and impulsive interference model for transmission channel environment. Also, it can being compensate the performance degradation by using MRC diversity scheme and BCH coding scheme.

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Improving Hot Spot Problem in Layer of DL-LEACH

  • LEE, WooSuk;Jin, Seung Yeon;Jung, Kye-Dong;Lee, Jong-Yong
    • International Journal of Internet, Broadcasting and Communication
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    • v.9 no.2
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    • pp.64-69
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    • 2017
  • The abstract should summarize the contents of the paper and written below the author information. Use th In Wide-area Wireless Sensor Networks, network lifetime is short due to energy consumption due to transmission distance. To improve this, we divide the sensor field into layers and reduce transmission distance through multi-hop transmission. However, there is a problem in that the transmission rate drops because there is no Cluster Head in the layer, or the transmission distance increases due to the layer, and energy is wasted. There are DL-LEACH and EDL-LEACH as Protocols to improve this. DL-LEACH uses either single-hop transmission or multi-hop transmission depending on the situation. As a result, the transmission distance is optimized, thereby reducing energy consumption. In case of EDL-LEACH, it is proposed to improve the data rate in DL-LEACH. It is the same as DL-LEACH, but the Cluster Head is mandatory for all layers to improve the transmission rate. Although there is no Cluster Head for each layer, the transmission rate is improved, but the network life is shortened. In this paper, we try to improve the network lifetime while maintaining the EDL-LEACH transmission rate. The shortened network lifetime is due to Cluster Head overload near the base station. To improve this, the Cluster Head distribution method is improved and the network lifetime is improved.

Performance Evaluation focused on Burst of Smoothing Algorithms (스무딩 알고리즘들의 버스트 성능 평가)

  • Lee, Myoun-Jae
    • Journal of Digital Contents Society
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    • v.13 no.1
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    • pp.111-118
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    • 2012
  • The burst is to require abruptly high transmission rate in case of transmitting pre-stored variable bit rate video data, and it causes to be inefficient use of network resource, resource reservation. To avoid these problems, smoothing is transmission plan where variable rate video data is converted to a constant bit rate stream. These smoothing algorithms include CBA, MCBA, MVBA and others. To evaluate amount of burst reduction in the existing CBA, MCBA, MVBA algorithm, this paper compares the burst-related-factors of transmission plan in smoothing algorithms with original video sources which were stored Variable Bit Rate. There are maximum frame bytes, maximum GOP bytes, transmission rate variability per frame, transmission rate variability per GOP in burst-related evaluation factors. Experimental result shows burst-related factors of smoothing algorithms which were used for experiment lower than that of pre-stored video data, except special case.

Design and Implementation of DLNA DMS for AV Contents Sharing through IEEE1394 (IEEE1394 기반 AV 콘텐츠 공유를 위한 DLNA DMS 설계 및 구현)

  • Kim, Chul-Seung;Kim, Gu-Su;Eom, Young-Ik
    • The KIPS Transactions:PartD
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    • v.13D no.7 s.110
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    • pp.959-970
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    • 2006
  • With the progress of home network technologies, the importance of the home network middleware for control and management of the digital appliances is increasing. Furthermore, by the technological growth of the AV equipments and the popularization of video contents, IEEE1394 for the transmission of AV data has spread fast. However, DLNA(Digital Living Network Alliance), which is a standard of the home network middleware, does not consider the transmission of AV data over IEEE1394. In this paper, we describe the problem occurring when the AV contents are transmitted over IEEE1394 in DLNA and propose the scheme for transmission of AV contents over IEEE1394. In addition, by the verification test of DLNA compatibility, we show that our proposed scheme can provide the share of AV contents without regard to the manufactures and transmission media.

An advertisement method using inaudible sound of speaker

  • Chung, Myoungbeom
    • Journal of the Korea Society of Computer and Information
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    • v.20 no.8
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    • pp.7-13
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    • 2015
  • Recently, there are serviced user customized advertisement of various type using smart device. Representative services are advertisement service using light of smart TV screen or audible sound of smart TV to transmit advertisement information. However, those services have to do a specific action of smart device user for advertisement information or need audible audio information of TV contents. To overcome those weakness, therefore, we propose an advertisement method using inaudible sound of speaker based on smart device. This method supports the transfer of advertising content to the smart device user with no additional action or TV audio signal required to access that content. The proposed method used two high frequencies among 18kHz ~ 22kHz of audible frequency range which smart TV can send out. And it generates those frequencies synthesized with audio of TV contents as trigger signal which can send advertisements to smart device. Next, smart device analysis the trigger signal and request advertisement contents related to the signal to server. After then, smart device can show the downloaded contents to user. Because the proposed method uses the high frequencies of sound signals via the inner speaker of the smart device, its main advantage is that it does not affect the audio signal of TV content. To evaluate the efficacy of the proposed method, we developed an application to implement it and subsequently carried out an advertisement transmission experiment. The success rate of the transmission experiment was approximately 97%. Based on this result, we believe the proposed method will be a useful technique in introducing a customized user advertising service.

Media Adaptation System for Contents Service Environments Using Scalable Video Coding (스케일러블 비디오 코딩을 이용한 환경적응형 미디어 시스템)

  • Bae, Seong-Jun;Jung, Soon-heung;Kang, Jung-won;Yoo, Jeong-Ju
    • IEMEK Journal of Embedded Systems and Applications
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    • v.3 no.4
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    • pp.175-181
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    • 2008
  • This paper describes the SVC-based media adaptation system which can adapt video contents optimally to various consumption environments in an IP-based transmission scenario. As key technologies, we will present scalable video coding, SVC-based adaptive media transmission, and SVC-based adaptation signaling technology.

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Transmission Performance Analysis for OTAR in LINK16 communication system (LINK16 통신체계에서 무선 키 갱신을 위한 전송성능 분석)

  • Hong, Jin-Keun
    • Proceedings of the Korea Contents Association Conference
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    • 2004.11a
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    • pp.384-388
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    • 2004
  • In this paper, we analyses transmission performance of synchronization pattern for over the air rekeying in aerial tactical link of LINK16, when it is given by symbol error rate, in respect of pattern detection probability and false alarm probability.

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