【摘要】：隨著數(shù)字電視技術(shù)的普及,數(shù)字電視機(jī)頂盒成為數(shù)字電視過渡時期必備的電子設(shè)備。由于我國以有線電視為主,數(shù)字有線電視機(jī)頂盒就走入了千家萬戶。巨大的機(jī)頂盒產(chǎn)業(yè),需要大量的技術(shù)和工程人員,大專院校必須培養(yǎng)相關(guān)的技術(shù)人才。我國的數(shù)字電視采用歐洲的DVB標(biāo)準(zhǔn),所以DVB-C數(shù)字有線電視機(jī)頂盒教學(xué)平臺成為大專院校電子信息專業(yè)必備的教學(xué)設(shè)備。本論文在闡述數(shù)字有線電視機(jī)頂盒技術(shù)原理的基礎(chǔ)上,提出了一個基于嵌入式系統(tǒng)的DVB-C機(jī)頂盒教學(xué)平臺的設(shè)計方案,設(shè)計了機(jī)頂盒教學(xué)平臺的各部分硬件電路、基于OS20操作系統(tǒng)的應(yīng)用層嵌入式軟件,以及教學(xué)中關(guān)鍵點(diǎn)的機(jī)頂盒測試方法和一系列教學(xué)實(shí)驗(yàn)方案。本設(shè)計采用ST公司生產(chǎn)的基于OS20操作系統(tǒng)的32位VL-RISC嵌入式CPU-Sti5516機(jī)頂盒芯片來完成數(shù)字電視信號的解復(fù)用、解碼以及視頻的編碼和音頻的D/A轉(zhuǎn)換,前端采用成都旭光的DCQ-1D/CW11F2-D5型高頻頭,可以很好地接收110-855MHz的數(shù)字有線電視信號。經(jīng)過實(shí)際測試,設(shè)計完成的DVB-C機(jī)頂盒教學(xué)平臺在功能、接收信號指標(biāo)、音視頻性能指標(biāo)上都達(dá)到了廣電局對產(chǎn)品的要求。該教學(xué)平臺適用于多門與數(shù)字電視相關(guān)的理論和實(shí)踐課程,可以方便地設(shè)計機(jī)頂盒的認(rèn)識、測試、維修等多種教學(xué)方案。
[Abstract]:With the popularity of digital TV technology, digital TV set-top box has become a necessary electronic equipment in the transition period of digital television. Because our country is mainly to cable TV, digital cable TV set-top box has entered thousands of households. The huge set-top box industry needs a large number of technical and engineering personnel, colleges and universities must cultivate relevant technical personnel. Digital TV in our country adopts DVB standard of Europe, so DVB-C digital cable TV set-top box teaching platform has become a necessary teaching equipment for electronic information major in colleges and universities. On the basis of expounding the technical principle of digital cable TV set-top box, this paper puts forward a design scheme of DVB-C set-top box teaching platform based on embedded system, and designs each part of hardware circuit of set-top box teaching platform. Application layer embedded software based on OS20 operating system, STB test method of key points in teaching and a series of teaching experiment schemes. This design adopts 32-bit VL-RISC embedded CPU-Sti5516 set-top box chip based on OS20 operating system produced by ST company to realize the demultiplexing, decoding, video coding and audio D / A conversion of digital TV signal. The front end is DCQ-1D/CW11F2-D5 type high frequency head of Chengdu Xugang. Can receive the digital cable television signal of 110-855MHz very well. After the actual test, the DVB-C STB teaching platform has met the requirements of the radio and television bureau in terms of function, receiving signal index, audio and video performance index. This teaching platform is suitable for many theoretical and practical courses related to digital TV, and it can easily design the understanding, test and maintenance of set-top box.
【學(xué)位授予單位】：南京理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN949.197

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 孫亞楠,鄭南寧,梁峰,陳安宏,孫飛;基于DVB-C的數(shù)字機(jī)頂盒系統(tǒng)及其軟件[J];中國有線電視;2002年17期

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本文編號：2210267