The Design and Performance Analysis of Digital Terrestrial Multimedia Broadcasting System

Abstract: Various standards have been developed for digital television broadcasting systems in the world. Consequently, Digital Terrestrial Multimedia Broadcasting (DTMB) is one of the digital television standards that is currently used by China and Hong Kong. DTMB standard consists of various configuration parameters that can be chosen for different applications. Therefore, DTMB system was designed in this research based on standard GB20600-2006 and was validated using computer program named Simulink. The parameters used for the design were FEC with code rate of 0.4, 4QAM mapping, interleaving mode 1 and single carrier mode. Those parameters were chosen based on low implementation complexity thus generates good results. The input for DTMB system was MPEG-2 audio and video Transport Stream (TS) structure. DTMB system consists of two important things such as the existence of FEC and TDS-OFDM. DTMB system uses concatenated codes in FEC. They are BCH as the outer codec and LDPC as the inner codec. DTMB system uses TDS-OFDM because it provides better picture quality when the receiver is in motion. Simulation results shows that DTMB is able to receive video with identical quality compared to the original video when the value of SNR=11 dB for static video and SNR=12 dB for dynamic video. It is shown that the number of bit errors decrease as the value of SNR increase when the process passes from LDPC to BCH.
Keywords: DTMB, digital TV, broadcasting, simulation, Simulink
Author: Emy Haryatmi, Tubagus Maulana Kusuma, Busono Soerowirdjo, Purnawarman Musa
Journal Code: jptkomputergg160154

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