Seung-gi Chang

Performance evaluation of Eureka-147 with RS(204, 188) code for mobile multimedia broadcasting

The demand for mobile multimedia broadcasting service is increasing consistently as more people expect seamless outdoor connections and communication capabilities. In this paper, we introduce the digital multimedia broadcasting (DMB) system based on Eureka-147 that has been tentatively adopted in Korea. Since Eureka-147 is originally designed for broadcasting digital audio data, it provides a bit error rate (BER) of about 10-4 while the transmission of compressed video data, for example, requires the BER of about 10-9. To deal with this mismatch, the Korean DMB standard is considering the addition of the RS(204,188) coder to Eureka-147. In this paper, we apply the RS(204,188) coder to the Eureka-147 and present the simulation results on the performance of this modified system at various transmission and protection modes. We conclude that the addition of RS(204,188) coder to Eureka-147 in the Korean DMB system results in the satisfactory level of BER for mobile multimedia broadcasting services.

A new SOLPN-based rate control algorithm for MPEG video coding

A new SOLPN (self-organizing learning Petri net)-based rate control algorithm for an MPEG encoder is proposed. The idea is to use SOLPN to realize the RD (rate distortion) model, which is self-organized on line and adaptively updated frame by frame. The method does not require off-line pre-training; hence it is geared toward real-time coding. The comparative results on the examples suggest that our proposed rate control schemes encode video sequences with fewer frame skips, providing good subjective quality and higher PSNR, compared to VM18.