| In recent years, the mobile phone has become the people’s life in many respects, in addition to basic calls and messages, watch television on phone has become possible. Analog TV mobile is a phone that carrying analogue TV chip, demodulating air signal, and watching free TV channels. Because it is hard for baseband chip to integrate such IP, currently baseband receive data from CCIR bus, which is demodulated by analog TV chip.The aim of this project is to design the hardware and software implementation of analog TV function in broadcast, search platform, recording. Because the design scheme of hardware will cause a variety of different board level interference,we realize a way to use software method to optimization board level interference and do not change the board.First we study the principle of analog TV, realized the mobile phone of analog TV hardware design and multimedia baseband chip module design, and finally realize the play and record of the basic function of analog TV.Next base on the embedded operating system kernel ThreadX, we design drive layer, API layer, MMI layer for software design project.So that analog TV can realize channel surfing, play, record, and other basic functions. We also list the design issues encountered while in the process.Finally in the play appeared the stripe interference and water ripple interference. The first thing is to analysis the disturbance of related modules, use software optimization method to different interference.This topic’s research plan was verified when my company using a new analog TV chip (QN8610) and got Volume production, the board level interference solution is used for reference to other mobile platform. |
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