• Journal of Broadcast Engineering
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• v.12 no.3
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• pp.214-221
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• 2007

In this paper, we presents conformance test tools for the broadcast web site (BWS) service which is one of the data services for terrestrial digital multimedia broadcasting (T-DMB). First, the methodology for the conformance test is established for both transmitters and receivers of T-DMB BWS services. The test tools consist of three parts: BWS bitstream analyzer, BWS reference decoder (software) module, and BWS test bitstreams. For testing transmitted BWS bitstreams, we developed the bitstream analyzer. For testing BWS receivers, we developed the reference Ifecoder module and created the test bitstreams. Actually the bitstream analyzer developed in this paper was used for the verification of the test bitstreams. The same test bitstreams are fed to a BWS decoder module under test and the reference decoder module and the results from the two are compared for verification. The test tools can be used for the test of all the protocol and textual/image specifications related to BWS including MOT protocol, HTML, PNG, MNG, JPEG, and Ecma Script.

• Proceedings of the KIEE Conference
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• 2006.04a
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• pp.75-77
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• 2006

In this paper, the technology of the conformance test for Broadcast Web Site Service (BWS) which is one of the data services of the T-DMB (Terrestrial Digital Multimedia Broadcasting) is proposed. First, the standard of the BWS Service is introduced and then the method of the conformance test of BWS bitstream and BWS receiver module is provided. A BWS bitstream analyzer is implemented for use in verifying the transmitted BWS bitstreams. To provide a means for the receiver manufactures to verify their own BWS receiver modules, a receiver test suite is developed including BWS test bitstreams and a BWS reference receiver module. The BWS bitstream analyzer includes the analysis function for the conformance test of MOT protocol, HTML, PNG, MNG, JPEG, and Ecma Script. Also, it was actually used for verifying the BWS test bitstreams. In the course of developing a HWS receiver module, 4he BWS receiver module under test can be verified by comparing the results of the BWS reference receiver module with those of the receiver module under test. when the same BWS test bitstreams are fed into the two receiver modules.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2006.11a
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• pp.297-300
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• 2006

DMB(Digital Multimedia Broadcasting)란 CD수준의 음질과 데이터 또는 영상 서비스 등이 가능하고 우수한 고정 및 이동 수신 품질을 제공하는 디지털 방식의 멀티미디어 방송이다. DMB는 서비스 방식에 따라 위성DMB와 지상파DMB로 나누어지며, 영상 및 음성 서비스에 데이터 신호를 동기화 시켜 데이터 서비스 또한 가능하다. 지상파DMB 데이터 서비스중 EPG(Electronic Program Guide) 서비스는 시청자가 현재 시청 중인 채널의 프로그램 편성 정보를 사용자에게 정의한다. 그러나 DMB 사업자 간의 이해관계 등으로 인해 시청자가 타 채널 편성정보를 확인하기 위해선 채널을 변경(Tunning)해야 하는 불편함이 있다. 이를 해결하기 위해 본 논문에서는 BWS(Broadcast Web Site) 표준과 리턴패스(Return Path)를 이용하여 지상파DMB의 EPG에서 확장된 개념인 XPG(eXtended Program Guide)를 제안하고 구현하였다. 이를 위해 2장에서 지상파 DMB의 각종 데이터서비스 표준 및 리턴패스(Return Path)를 분석하였으며, 3장에선 XPG 서비스를 제공하기 위한 XPG 서비스 시스템을 설계하고, 이를 위한 XPG 애플리케이션을 설계 및 구현하고 그 결과를 나타내었다.

• Journal of KIISE:Computing Practices and Letters
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• v.13 no.5
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• pp.311-319
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• 2007

Today, the data broadcasting service provides various multimedia contents to users. This paper suggests a resource management system which controls multimedia resources in order to reduce the receiving time of the contents during the realtime data broadcasting of multimedia traffic information. To verify the efficiency of the resource management system, this paper has introduced the realtime traffic information integrating and authoring systems through MOT (Multimedia Object Transfer) protocol-based BWS (Broadcast Web Site) service in which multimedia data are transmitted by T-DMB (Terrestrial Digital Multimedia Broadcasting) and implemented a resource management system which controls the creation of multimedia resources in connection with the said systems. As the receiving time of the contents created with resources from the resource management system has decreased by 1/13, they are suitable for realtime data broadcasting.

• Journal of KIISE:Computing Practices and Letters
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• v.12 no.5
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• pp.300-311
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• 2006

Traffic information is considered as one of the core contents of the terrestrial DMB. This paper proposes and implements the data broadcasting system, which automatically collects data and transmits the contents in order to provide traffic information promptly The proposed data broadcasting system comprises the following three subsystems: 1 he traffic information integration system for collecting and processing data in real-time, the traffic information authoring system for automatically creating and verifying the contents, and the traffic information transmission system for transmitting the created contents. We describe these subsystems in detail about their functionality, components and interoperability. The proposed data broadcasting system provides the HWS type contents as the PAD data of the terrestrial DMB audio broadcast. Finally, we describe our implementation of the data broadcasting system, and suggest further improvements that need to be made.