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【正文】 書 第 II 頁目 錄1 緒論 .........................................................................................................................................1 課題描述 ..........................................................................................................................1 基本工作原理及框圖 ......................................................................................................12 數(shù)字機(jī)頂盒主要模塊 ..............................................................................................................2 調(diào)制解調(diào)模塊 ..................................................................................................................2 MPEG2 解碼 ....................................................................................................................3 數(shù)字視頻編碼器和音頻 DAC .........................................................................................3 圖形控制模塊 ..................................................................................................................4 媒體訪問控制模塊 MAC ................................................................................................43 數(shù)字電視機(jī)頂盒軟件系統(tǒng) .....................................................................................................44 CA 系統(tǒng) ...................................................................................................................................6 在發(fā)送端的加密過程 .......................................................................................................7 接收端的解密過程 ...........................................................................................................7總 結(jié) .......................................................................................................................................8致 謝 .....................................................................................................................................10參考文獻(xiàn) ................................................................................................................
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