Sammo Cho

Development of terrestrial DMB transmission system based on Eureka-147 DAB system

This paper introduces T-DMB transmission system in Korea based on Eureka-147 DAB and presents a new architecture of transmission system for digital multimedia services. For transmission of the digital multimedia contents in mobile environment by using the existing DAB, we developed a T-DMB processor which performs T-DMB encoding and insertion of the media stream into the existing DAB transmission system. After the implemented T-DMB processor can be connected to the front of the commercial Eureka-J47 DAB system, and the performance of the T-DMB system is confirmed through the T-DMB experimental broadcasting in Korea.

System and Services of Terrestrial Digital Multimedia Broadcasting (T-DMB)

Commercial terrestrial digital multimedia broadcasting (T-DMB) service was launched on December 1st, 2005, in the Seoul metropolitan area of the Republic of Korea. As the worlds first commercial terrestrial mobile multimedia broadcasting service, T-DMB garnered huge attention in the field of mobile broadcasting. This paper presents the history, system, and services of T-DMB

Real Time Traffic Information Service Using Terrestrial Digital Multimedia Broadcasting System

The major contribution of this paper is the implementation of real time traffic and traveler information service through the terrestrial digital multimedia broadcasting (T-DMB) system, which are known to be suitable for the mobile data services as well as audio and video services. The implemented system converts the Korean characteristic traffic information into the transport protocol expert group (TPEG) messages, and provides them to the T-DMB system. By testing the service with the TPEG message decoder implemented in the navigation system on PDA and laptop, it has turned out that it can be used as a highly efficient traffic information service system that could be adopted in Korea as well as in European countries

An efficient transmission of traffic and traveler information using digital multimedia broadcasting network

This paper introduces an efficient transmission of traffic and traveler information through digital multimedia broadcasting system, which is a multimedia and mobility empowered version of European digital audio broadcasting system. By introducing Korean characteristic traffic information into the transport protocol expert group messages, we could get highly efficient traffic and traveler information system that could be used in Korea as well as in European countries Keywords-component; traffic and traveler information, digital multimedia broadcasting, digital audio broadcasting

A Traveler Information Service Structure in Hybrid T-DMB and Cellular Communication Network

This paper introduces a structure of delivering traveler information service including point of interest information through the terrestrial multimedia broadcasting system, in which, the receiver is connected with cellular communication terminal to enable the interactivity of the service. By combining real time traffic information and point of interest information, we could get an efficient traffic and traveler information service system that could be used for many location based applications

Delivery of New TTI Services over Terrestrial DMB and a Bidirectional network

This paper proposes the network structure and service model to deliver new traffic and travel information (TTI) services over terrestrial digital multimedia broadcasting (T-DMB) and a bidirectional network. We have newly specified a POI (point-of-interest) and a NWS (news information) application services which are perfectly compatible with TPEG (transport protocol expert group) protocols, and implemented T-DMB based TTI systems including TPEG encoder/decoder and a return-channel server system through CDMA as a bidirectional network. In the real-field environment as verifying the proposed services and systems above, we showed their stability and effectiveness by the excellent results in this paper.

New TPEG applications based on digital multimedia broadcasting

The digital multimedia broadcasting (DMB) allows can provide an economical way of massive multimedia data services, thus, it is emerging as an optimal solution to address the several drawbacks of the mobile communication network. Among the data services based on the DMB, the traffic and travel Information (TTI) service has been spotlighted in aspects of economic influence and information usability. For example, the demand of TTI service has dramatically increased due to rapid increase in the number of vehicles and population of frequently traveling on long-weekends. In order to satisfying such a demanding, a transport protocol experts group (TPEG) protocol was developed. However, TPEG has been applied merely to two application areas up to now and there is no consideration to standardize new services very valuable for drivers and travelers. This paper presents new economic and effective point of interest (POI) and news services compatible to TPEG that can be provided in the DMB. To verify the stability of POI and news protocols, we implemented the TTI data server/client, and the DMB/DAB receiver with the TTI decoder. Through the experimental broadcasting in the local DMB network, it is shown that the proposed protocol operates stably and effectively in the navigation system.

Bidirectional Location Based Services Using Terrestrial-DMB and Wireless Communication Network

This paper presents a new bidirectional location based service (LBS) using terrestrial-digital multimedia broadcasting (T-DMB) and wireless communication network. We propose a new bidirectional POI (point-of-interest) application interoperable with TPEG protocol, and introduce the POI data server/client in T-DMB network and the bidirectional TTI contents server/host server in wireless communication network The receiving platform based on laptop computer is connected to T-DMB receiver and CDMA modem simultaneously, and it includes the TPEG decoder implemented by using the proposed protocol. The stability and effectiveness of the proposed protocol is verified through the field test.

Managing multimedia data services with multiple ensemble decoding architecture in digital audio broadcasting system

This paper proposes the architecture of multiple ensemble service in DAB network, in which they can transmit and receive more than one ensemble through multiple transmitters, which covers the same service area. Using this architecture, ensemble providers and transmission network providers have more flexible management environment of DAB networks as well as they can accommodate more than 1.5 Mbps data capacity limit of one ensemble.

A Novel TSI application Based on TPEG using T-DMB

The demand of travel and traffic information (TTI) service has dramatically increased due to rapid increment in the number of vehicles and population of frequently traveling on long weekends. In order to satisfying such a demand, a transport protocol experts group (TPEG) protocol was developed. However, merely two TPEG applications were standardized up to now. This paper presents a novel application, traffic status image information (TSI) application compatible to the existing TPEG protocol, which can be provided in T-DMB network. To verify the stability of TSI protocol, we implemented TSI data server/client, and T-DMB receiver with TSI decoder. Through an experimental broadcasting in the local DMB network, it is shown that the proposed application operates stably and effectively in the verification receiver.