• Title, Summary, Keyword: universal multimedia access

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Broadcasting and Communication Convergent Network Based on MPEG-21: Design and Implementation of Multimedia Service Framework

  • Cho, Yong-Ju;Kim, Jae-Gon;Hong, Jin-Woo
    • ETRI Journal
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    • v.28 no.5
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    • pp.561-573
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    • 2006
  • In this paper, we present a practical implementation of the MPEG-21 multimedia framework for broadcasting and communication convergent services. MPEG-21 standard technology was exploited to build a convergent service framework. Using this framework, a service model and several scenarios have been successfully designed and implemented. In addition, interoperability, which is the main objective of a multimedia framework, especially in a convergent environment consisting of heterogeneous networks and various types of devices, has been addressed in detail. The experimental results show that the implemented test bed provides a next-generation multimedia service; that is, universal multimedia access (UMA), meeting the requirements of a broadcasting and communication convergent environment.

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ITU-T Vision

  • 김영균;도재혁
    • Information and Communications Magazine
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    • v.19 no.7
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    • pp.40-55
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    • 2002
  • The advent of Third Generation (3G) communication systems, with their ability to process real-time multimedia applications and their large bandwidths, will greatly enhance mobile Internet access. Not only does Wideband Code Division Multiple Access (WCDMA) and cdma2000 radio technology offer an advantageous density for voice in terms of spectral efficiency, it also supports higher rates and offers differentiated levels of duality of Service (QoS) for data applications. The early introduction of packet and multimedia technologies will be a key element in realizing a quick and successful return on the operator's investments in Universal Mobile Telecommunications System (UMTS) and cdma2000.

Utility-Based MPEG-21 Video Adaptation for Universal Multimedia Access (UMA를 위한 유틸리티 기반 MPEG-21 비디오 적응)

  • 김재곤;강경옥;김진웅;김형명
    • Proceedings of the IEEK Conference
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    • pp.1491-1494
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    • 2003
  • Video adaptation in response to dynamic resource conditions and user preferences is required as a key technology to enable universal multimedia access (UMA) through heterogeneous networks by a multitude of devices in a seamless way. Although many adaptation techniques exist, selections of appropriate adaptations among multiple choices are often ad hoc. To provide a systematic solution, we present a general conceptual framework to model video entity, adaptation, resource, utility, and relations among them. It allows for formulation of various adaptation problems as resource-constrained utility maximization. We apply the framework to a practical case of dynamic bit rate adaptation. Furthermore, we present a description tool, which has been accepted as a part of the MPEG-21 Digital Item Adaptation (DIA), along with a brief overview of the .elated descriptors to support terminal and network quality of service (QoS).

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The Proposed UMA Mode in DMB CAS Authentication Process (비인가 무선접속 모드를 이용한 디지털 멀티미디어 방송의 제한 수신시스템의 인증 제안)

  • Oh, Se-Kab;Kang, Heau-Jo
    • Journal of Advanced Navigation Technology
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    • v.12 no.3
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    • pp.239-244
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    • 2008
  • In this paper refer to the digital multimedia mobile phone with the combination of broadcasting and the communication the unity of wire and wireless solution that can provide the UMA(Unlicensed Mobile Access) function is added. In UNC(Universal Naming Convention) in the case of CAS(Conditional Access System) is supported, the device(mobile phone) is authenticated through AP and then following the method of broadcasting signal the user can view the wanted contents as long as they want and for this matter the service charge system are proposed.

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A Universal Smart-phone APP for Processing One-shot Tasks (일회성 작업 처리를 위한 통함 스마트폰 앱)

  • Cha, Shin;So, Sun Sup;Jung, Jinman;Yoon, Young-Sun;Eun, Seongbae
    • Journal of Korea Multimedia Society
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    • v.20 no.3
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    • pp.562-570
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    • 2017
  • One shot tasks like a MERSC handling policy, a cinema poster, and so on are too small, diverse, and sporadic to make them as apps or web applications. They are usually shared as the form of notes attached in the field or messages in smart phones. In order to support inter-operability with internet web sites, QR/NFC tags are attached to them. What matters in the web technology is that HTML5 standard does not supply the accessability of smart phones' resources like a camera, an audio, magnetic sensors, and etc. In this paper, we propose a universal smart phone application for handling various one-shot tasks in the same UI/UX. One-shot tasks are described with HTML5 web documents, and the URL for the web documents are stored in QR/NFC tags. A smart phone scans a tag, and then the web document is retrieved and presented finally. QR tags can be delivered to other smart phones through messages or SNS. We solve the problem of HTML5 standard supplying a resource access library with javascrippts. We suggested the whole architecture and the internal structure of QR/NFC tags. We show that our scheme is applicable to make variable one-shot tasks.

RSS Service Method Using the User's Concerned Area and the QoS of Wireless Devices (사용자의 관심영역과 무선 단말기의 QoS를 고려한 RSS 서비스 방법)

  • Lee, Jong-Kap;Ryu, Dong-Yeop;Kong, Ran-Sook;Lim, Young-Hwan
    • The KIPS Transactions:PartC
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    • v.16C no.1
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    • pp.125-132
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    • 2009
  • The pre-generated web contents or various devices have to be used in order to execute UMA(UMA:Universal Multimedia Access). However, an HTLM web page for PC is not very compatible with wireless internet because of its unnecessary advertisements, high resolution, and various multimedia data. This is because the main focus when creating it was on high speed. In this paper indicates with the RSS channel, converted from the main part of the HTML web page, which users show interest in, a wireless compatible internet page can easily be created. Consequently, web administrators could create a wireless page easily and quickly, and wireless users would be able to find information in the same manner.

Presentation Priority and Modality Conversion in MPEG-21 DIA

  • Thang, Truong Cong;Ro, Yong Man
    • Journal of Broadcast Engineering
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    • v.8 no.4
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    • pp.339-350
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    • 2003
  • The Part 7 of MPEG-21, called Digital Item Adaptation, aims at an interoperable transparent access of multimedia contents in heterogeneous environments. This standard facilitates the development of Universal Multimedia Access (UMA) systems, which adapt the rich multimedia contents to provide user the best possible presentation under the constraints of various terminals and network connections. Content adaptation has two major aspects: one is modality conversion that converts content from one modality (e.g. video) to different modalities (e.g. image) the other is content scaling that changes the titrates (or qualities) of the contents without converting their modalities. At the output of adaptation process, the highly-subjective qualities of adapted contents nay vary widely with respect to point-of-views of different providers and different users. So, user should have some control on the adaptation process. In this paper, we describe two description tools of user characteristics, the presentation priority preference and the modality conversion preference, which allow user to have flexible choices on the qualities and modalities of output contents. We also present a systematic approach to integrate these user preferences into the adaptation process. These description tools are developed in the process of MPEG-21 standardization.

A Method to create transcoding path of unit transcoder considering QoS (QoS를 고려한 단위변환기의 변환 경로 생성 방법)

  • Ryu, Dong-Yeop;Chon, Sung-Mi;Lim, Young-Hwan
    • Journal of the Korea Society of Computer and Information
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    • v.12 no.1
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    • pp.253-260
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    • 2007
  • A multimedia converter is used to create media suitable for own environment. If the data complying with own demands can not be created, it may accompany with a problem that has to convert the data with another transcoder. In addition, conventional converters do not consider source QoS and target QoS sufficiently, meaning that users should have a significant knowledge base about various media in order to obtain desired results. These problems become limits on the UMA(Universal Multimedia Access) environment. In this paper, we create a suitable transcoding path before performing the Digital Item conversion in consideration of source QoS and target QoS. The created transcoding path performs the adaptive transcoding using unit exchanges featuring connectivity. The consideration of QoS allows users to use the multimedia easily. Since the proposed model, in addition, use the unit transcoder, it provides a excellent adaptive capability for new QoS.

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An Application-Independent Multimedia Adaptation framework for the Mobile Web (모바일 웹을 지원하는 응용 독립적 멀티미디어 적응 프레임워크)

  • Chon, Sung-Mi;Lim, Young-Hwan
    • Journal of Internet Computing and Services
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    • v.6 no.6
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    • pp.139-148
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    • 2005
  • The desired level for multimedia services in the mobile web environment, the next generation web environment, is expected to be of PC level quality. And great efforts have been made in the development of hadware technology, communication technology, various kinds of services and standardization to support these services, In the mobile web environment, multimedia contents adaptation services should be available through supporting various kinds of devices, network abilities and users' preferences. It means that due to the variety of both desired devices' hardware specifications, called destinations, and desired QoSes, the QoSes in the destinations are not fixed or defined. If a new user wants to stream multimedia contents in a server through a new kind of terminal device, it should be considered whether the existing transcoders are able to adapt the multimedia contents. However, the existing libraries for multimedia adaptation have heavy transcoder figures which include all adaptive functions in one library, The challenge of universal access is too complex to be solved with these all in one solutions. Therefore, in this paper we propose an application independent multimedia adaptation framework which meets the QoS of new and varied mobile devices. This framework is composed of a group of unit transcoders having only one transcoding function respectively, Instead of heavy transcoders. Also, It includes the transcoder manager supporting the dynamic connections of the unit transcoders in order to satisfy end to end QoS.

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Power saving in Kand-held multimedia systems using MPEG-21 Digital Item Adaptation (MPEG-21 디지털 아이템 적응을 이용한 휴대용 멀티미디어 시스템의 전력 소모 절감 기법)

  • Shim Hojun;Cho Youngjin;Kim Jaemin;Chang Naehyuck
    • Journal of the Institute of Electronics Engineers of Korea SD
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    • v.43 no.2
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    • pp.60-75
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    • 2006
  • The MPEG-21 Multimedia Framework initiative aims to support a wide range of networks and devices in the delivery and consumption of multimedia resources. One of the primary goals of MPEG-21 is universal multimedia access (UMA) through Digital Item Adaptation (DIA), which supports multimedia streaming to heterogeneous devices ensurung the same readability and seamlessness. We pioneer power saving of luminal devices with MPEG-21 DIA, so that the MPEG-21 DIA can also be used to support power saving, even though the framework is not primarily designed for power reduction and only limited power awareness is defined by DIA. We introduce several power-saving techniques conforming to MPEG-21 DIA specifications and show the dependency relation among introduced techniques. We achieve energy savings of up to $66\%$ in hand-held multimedia devices with minor QoS (quality of service) degradation.