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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-147 DAB system, and the performance of the T-DMB system is confirmed through the T-DMB experimental broadcasting in Korea. [ABSTRACT FROM AUTHOR]

Satellite digital multimedia broadcasting (S-DMB) service has been launched in Korea in May 2005. S-DMB can provide high quality broadcasting services (audio, video, and data) to handheld mobile receivers via the geostationary satellite. Due to multipath fading, incurred inter-code-interference limits the current S-DMB system to utilize only half the available Walsh code sequences, thereby decreasing channel utility. To maximize the use of broadcast channel resources, we propose a transmission method of combining spreading and code modulation. The efficient use of Walsh code sequences increases the capacity of the S-DMB system in an interference prone environment, without degrading quality of service. [ABSTRACT FROM AUTHOR]