The Research And Implementation Of De-Mutiplexing And Time-Slicing Technology In DVB-H Receiver System

With the development of digital television and mobile equipment, new technology has been proposed to receive broadcasting television programs on the handheld device, such as PDA and mobile phone. DVB-H (Digital Video Broadcasting for Handheld Terminals) standard proposes an excellent approach to implement it. This standard is the extension of the DVB-T (Terrestrial Digital Video Broadcasting) standard and can offer the high-quality reception for digital broadcasting television and other multimedia service. This thesis has provided the theoretical analysis and practical implementation on the two technologies—TS parsing for multi-protocol encapsulation and time-slicing.First of all, this thesis introduces the general structure of entire DVB-H system based on the DVB-H standard. Then, it analyzes the critical technologies: time-slicing, multi-protocol de-encapsulation and FEC (Forward Error Correction). The most special trait is the distinct format of data, and this thesis dissects a set of different format of data as well as SPI/SI (Program Specific Information/ Service Information) associated with DVB-H system. It also deeply explores the CRC32 and checksum arithmetic.Secondly, the most conspicuous creative design in this thesis is to conceive a hardware structure, which is quicker than software implementation, to carry out the multi-protocol de-encapsulation function. Since this part plays a key role in link layer, a kind of mechanism based a set of state machines is deviced to help parsing packets, which also involve packet-filtering, packet-checking, packet-switch and interrupt-generation.Thirdly, this thesis also studies and implements the Time-Slicing function based a special method which combines the hardware controller with software controller. As a result, this way helps to achieve the timing management and decrease the power consumption.Finally, this thesis also discusses on the perfect verification process on DVB-H link layer, including the simulation verification and FPGA testing. Eventually, the final design has not only passed the FPGA testing but also displayed the real-time DVB-H program through FPGA platform in the lab.