subject: Mobile Tv (dvb-h) Software Receiver (photos) - Mobile Tv, Dvb-h System - Radio And Television [print this page] Abstract: The mobile device is received, it is easy for transmission of noise interference, making the original transmission data are generated distortion, destruction or damage, thereby affecting the quality of services provided (such as audio and video transmission), and even hostile environment disruption caused. Therefore, to maintain good service quality is indispensable. In Mobile TV (DigitalVideoBroadcasting-Handheld, DVB-H ) Receiver, mainly using multi-protocol encapsulation FEC (Multi-ProtocolEncapsulationForwardErrorCorrection, MPE-FEC) mechanism of repair has been destroyed or damaged data. In the design, implementation, due to hardware modification and validation of the time is long, the required investment capital is far more substantial use of software, so this paper mainly to the realization of the software receiver for DVB-H MPE-FEC mechanism have been damaged or destroyed for the transmission of data to repair. In the MPE-FEC error correcting operations department with Li-de Solomon (Reed-SolomonCode, RSCode), through the RS codes are powerful error correcting capability to repair damaged data, to improve resistance to noise and data transfer correctness, in order to achieve the purpose of maintaining quality of service.
This study is the use of cross-platform Java programming language in the personal computer on the receiving end DVB-H MPE-FEC mechanism for simulation and implementation, due to cumbersome RS error correction decoding operation, resulting in the overall transport stream decoder relatively long time required. This study also uses the C / C + + language with different RS decoding algorithm, and individual Windows and Linux operating systems on the implementation of the experimental results provide some hope on the future design reference.
1, Introduction Handheld Digital TV DVB-H (DigitalVideoBroadcasting-Handheld) system standards [1] mainly in the ground Broadcasting System, DVB-T (DigitalVideoBroadcasting-Terrestrial) architecture as the core, and then add the new technical standards for specification development. As the DVB-T system using coded orthogonal frequency division series multi-tasking (CodedOrthogonalFrequencyDivisionMultiplexing, COFDM) modulation technique as much as the carrier for the multi-path (Multi-path) reflex effects arising from the issue of interference and attenuation, can provide effective treatment and rejection, so it is suitable for use in mobile applications. In addition, DVB-H system standards also features new and improved technologies: DVB-H transmission parameters of signal (TransmissionParameterSignaling, TPS), time-slice (TimeSlicing), Soft handover (SoftHandover) algorithm, 4K mode, depth sign in intercalatum (In-depthsymbolinterleaver) and multi-Protocol Encapsulation FEC (Multi-ProtocolEncapsulationForwardErrorCorrection, MPE-FEC) techniques, hand-held devices used to improve mobile reception performance and power consumption issues to overcome, but also through mobile TV Conditional Access (ConditionAccess, CA) Application and Electronic Service Guide (ElectricServiceGuide, ESG) and other functions to make the services provided by more complete and more security.
2, Related Technologies
Recently for the DVB-H MPE-FEC mechanism of research articles, focusing mainly on the receiving end in the solution package, how to transfer the data stream error detection judgments, how to provide error correction during the decoding operation need of wrong information and ways to improve the MPE-FEC mechanism for enhancing the detection of the error repair ability.
