Design And Implement Of Handset Television Terminal Based On WLAN

With the development of network technology and multimedia technology, communication technologies become comprehensive,digital,intelligent and personal. It is possible that a single terminal implement voice,video,data and other business. In addition,improvement of living standards as the society,the media information on a wide range of consumer demand growing.People not only requires to watch mobile TV programs,but also hope to be able to readily access Internet.Mobile TV terminals receiver available in the market only a single digital TV broadcasting,so has the Bluetooth wireless Internet access,or transmission of the portable multi-function mobile TV terminals as emerging multimedia systems become hot research topics.This paper analyse mobile digital TV technology for the development of the process of terminal based on WLAN,the terminal will not only receive the standard T-DMB digital television and wireless local area network access to wireless Internet capabilities,the research of this article reads as follows:(1) Terminal hardware design is Based on the analysis of the WLAN technology,the principle of CPU chip.Base-band circuit features include:SH-7343 main processor and its interface circuits,power management modules,memory modules,including a stereo headset and the audio decoder output amplifier module, clock module,WLAN module.T-DMB receiver module,including T-DMB signal receiving antenna and RF front-end receiver module.(2) Paper analyzed the composition and its driving structure of T-Kernel operating system.It provided the realization program of terminal software of the key modules.The program is divided into two parts,including WLAN feature-driven development and MPEG-4 data stream decoder to achieve the TS.(3) Thesis on mobile digital TV receiver terminal functional testing and performance optimization are also introduced,including WLAN functional tests, T-DMB receiver and system functional testing to optimize audio performance.After testing,the end of the program design in the functional efficiency and system stability are achieved the desired results.At the same time,paper-to-end audio A/D converted digital filter design analysis and improvement,the elimination of the terminal in the process of recording Howl phenomenon.I believe that in the near future,the functions of the whole is bound to the mobile TV terminals,it is hoped that this paper,the mobile TV terminal design programs to mobile phones in China the development of television terminals play a role in the drawing.