Research Of Dab/dmb Digital Multimedia Broadcasting Receiveing And Processing System

DAB/DMB is a mobile digital multimedia broadcasting system that according with ETSI Criterion and ITU Standards. Nowadays, DAB/DMB system has a wider application aera and a bigger user colony, so the value included in this signal is increasing. However, the correlated departments are destitute of practical ways in dealing with this signal. Thus, the researchs of DAB/DMB Digital Multimedia Broadcasting Receiveing and Processing System have practical meaning. The following works are contained in this issue:A PC based DAB/DMB Digital Multimedia Broadcasting Receiveing and Processing System is designed based on the research of DAB/DMB system's key technologies and the general structure of DMB receivers. An ARM based hardware system is designed and realized; schematic document design, PCB design and circuit debugging are completed. The hardware platform is provided.Due to the research of typical user operation, the On-Chip fireware scheduler is designed and realized which can choose and control the hardware operation; USB interface design is completed which can realize the telecommunication and datas transfer between PC and On-Chip MCU.Based on the research of the data types of DAB/DMB system channel, the decoding of Fast Information Channel datas and the resolution of time information is realized; Based on the structure of Transport Streams in depth, the RS decoding, TS demultiplexing and playing of Main Service Channel data stream is completed; an extraction method is proposed and designed which supports the consecutive organization of video/audio information in the DMB TS stream; an error tolerance extraction way is proposed which improves the extraction effect of the DMB video streams..