The Design And Implementation Of Data Link-Layer Module In DVB-H Receiver System

DVB-H (Digital Video Broadcasting for Handheld) which is presented by the European Telecommunications Standard Institute (ETSI) provides an efficient way of carrying multimedia services over digital terrestrial broadcasting (DVB-T) networks to handheld terminals. The DVB-H standard is compatible with DVB-T, and additionally incorporates with the techniques of time-slicing and Multi-Protocol Encapsulation-Forward Error Correction. This thesis presents a design of DVB-H Data link-layer module which can achieve the operation of Time-slicing and Multi-Protocol Encapsulation.The DVB-H standard uses the Multi-Protocol Encapsulation (MPE) to deliver the digital TV service data and information. The digital TV data are firstly packed into the IP datagram followed by Multi-Protocol Encapsulation and then delivered via the MPEG-2 transport stream. Based on the analysis of the format of data of the MPEG-2 transport stream packet and Multi-Protocol Encapsulation section, two key modules of the DVB-H data link layer module, i.e. MPEG-2 TS de-multiplexing module and DVB de-encapsulation module are realized. The packet parsing flow and relative register configuration are presented.For handheld terminals, the power consumption is a very important measure, while the mechanism of time-slicing can be used to reduce the power consumption of the DVB-H receiver effectively. Based on the investigation of the influencing factors on the transmission of the off-time and on-time of the DVB-H terminal, a time-slicing control mechanism, which can effectively reduce the power consumption, is proposed and realized.Finally, the simulation results of each main module are presented, and the result show that the design requirement is achieved.