| Digital television is the result of the digital information technology revolution. Compared with analog television signa, digital television signal have the goodness of strong anti-interference ablity, high signal quality, high transmission efficiency, multiplexing, easy storage, good to connect network, easy realization of scramble/ scramble and encryption/deciphering. Now there are three mature digital television standard: ATSC standard, DVB standard and ISDB standard. Analog television changing to digital has been vigorous proceeding, which has produced set-top-box, integrated digital TV and other product. Digital television replacing is strong direction.This paper disucess the search/change channel realization of ATSC digital and analog integrated TV basing on the hardware of BCM3560 chip under Linux. BCM3560 which is used to solve the digital tv systerm with single chip is the Soc chip made by broadcom.Linux has the feature of openness, multitasking, good user interface, device independence, abundant network function, good portability; transportability and so on.This paper discuss how to storage, update and display the channel informations and how to change/search channel , fine adjusting frequency and AFT in the ATSC /NTSC digital/analog integrated set(American set).Good software structure could speed up the of new product, shorten development cycle, reduce development cost; otherwise is good to maintenance and stage original software. Author point out the idea of using MVC to develop software of the digital tv at the end of paper. |
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