android4.0系統(tǒng)的網(wǎng)絡(luò)機(jī)頂盒硬件設(shè)計(jì)

1、Android4.0 系統(tǒng)的網(wǎng)絡(luò)機(jī)頂盒硬件設(shè)計(jì) android4.0 系統(tǒng)的網(wǎng)絡(luò)機(jī)頂盒硬件設(shè)計(jì) 摘 要 伴隨著互聯(lián)網(wǎng)的應(yīng)用業(yè)務(wù)需求量的極速提高， 寬帶網(wǎng)絡(luò)的建設(shè)與拓展也蓬勃發(fā)展， 網(wǎng)絡(luò)視頻的優(yōu)勢也隨著網(wǎng)絡(luò)帶寬的增加而越來越明顯。 網(wǎng)絡(luò)機(jī)頂盒以互聯(lián)網(wǎng)為傳播通道傳送音視頻流與數(shù)據(jù)流， 作為一種新的媒體體現(xiàn)方式， 用戶可以在電視上直接點(diǎn)播節(jié)目和收看直播內(nèi)容， 它具有清晰度高， 用戶體驗(yàn)好和資源豐富等優(yōu)勢，將取代傳統(tǒng)機(jī)頂盒，成為家庭視聽多

2、媒體中心。 開放式互聯(lián)網(wǎng)機(jī)頂盒將是網(wǎng)絡(luò)機(jī)頂盒的發(fā)展方向， 它將互聯(lián)網(wǎng)的交互性、 泛在性和電視機(jī)的高清性、 享受性融為一體。 開放式互聯(lián)網(wǎng)機(jī)頂盒可以通過家庭網(wǎng)關(guān)訪問IPTV專用網(wǎng)絡(luò)及公共互聯(lián)網(wǎng)絡(luò)， 可通過電視機(jī)、 音響等播放設(shè)備向終端用戶提供頁面信息瀏覽、IPTV播放、互聯(lián)網(wǎng)視音頻播放、應(yīng)用商城、可視通信、家庭媒體共享、 游戲等交互式業(yè)務(wù)服務(wù)， 這就需要網(wǎng)絡(luò)機(jī)頂盒的操作系統(tǒng)具有智能化、開源化、通用化以及強(qiáng)大的第三方軟件支持。但是目前的網(wǎng)絡(luò)

3、機(jī)頂盒主流操作系統(tǒng)是嵌入式LINUX系統(tǒng)，從本質(zhì)上來講它還是一種基礎(chǔ)的非智能操作系統(tǒng)，應(yīng)用軟件受限于開發(fā)商， 且兼容性并不佳。 互聯(lián)網(wǎng)巨頭谷歌公司在2011年10月19日推出了Android4.0系統(tǒng)使智能網(wǎng)絡(luò)機(jī)頂盒的實(shí)現(xiàn)成為了可能。眾所周知，Android是Google開發(fā)的基于Linux內(nèi)核的軟件平臺(tái)和操作系統(tǒng)，而最新版的Android 4.0同時(shí)支持智能手機(jī)、平板電腦、電視等設(shè)備，至此Android系統(tǒng)設(shè)備將擁有真正開放和最為完

4、整統(tǒng)一的先進(jìn)特性。 但是Android4.0系統(tǒng)的網(wǎng)絡(luò)機(jī)頂盒也不能隨用戶自己的喜好觀看網(wǎng)絡(luò)音視頻， 因此其開放性為第三方應(yīng)用軟件設(shè)立了應(yīng)用市場， 從而用戶可以方便地從網(wǎng)絡(luò)獲取所需的應(yīng)用軟件， 并通過網(wǎng)絡(luò)與其他媒介進(jìn)行互動(dòng)，例如網(wǎng)頁瀏覽、視頻影片播放、在線聊天、游戲娛樂、在線電影電視等。 本論文完成的任務(wù)是針對(duì) android 系統(tǒng)在網(wǎng)絡(luò)機(jī)頂盒中的應(yīng)用需求， 以網(wǎng)絡(luò)機(jī)頂盒的硬件系統(tǒng)為研究對(duì)象，設(shè)計(jì)出了一款高性能、低成本、低功耗的andro

5、id4.0 網(wǎng)絡(luò)機(jī)頂盒。它支持有線 LAN 網(wǎng)和 USB 擴(kuò)展的 WIFI 無線網(wǎng)絡(luò)傳輸，接收和處理網(wǎng)絡(luò)獲取的音視頻流和數(shù)據(jù)流， 通過網(wǎng)絡(luò)機(jī)頂盒的主處理器對(duì)其進(jìn)行硬解碼，并通過豐富的外部接口輸出顯示。 論文中分析了網(wǎng)絡(luò)機(jī)頂盒的硬件原理和 android4.0 系統(tǒng)的硬件需求,制定Android4.0 系統(tǒng)的網(wǎng)絡(luò)機(jī)頂盒硬件設(shè)計(jì) Network set-top box hardware design of android4.0 system

6、 Abstract With the application of Internet’s business demand speedly increasing, construction and expansion of broadband network is quickly booming. The advantage of network video is more and more obvious with the increa

7、se of network bandwidth. Network set-top box transmite the audio and video stream and data stream by Internet. As a new media forms, the user can directly request program on TV and broadcast content by it. Network set-to

8、p box has high definition, good user experience and rich resources and so on, which will replace the traditional set-top box and become a family of audio-visual center. Open network set-top box will be the development di

9、rection of network set-top box, which inosculate interactive and universal of Internet, high defitinition and enjoyment of TV as a whole. Open network set-top box can access the IPTV private network and the public Intern

10、et through the home gateway, and use television and audio to provide page information browsing, IPTV player, Internet video and audio, the app store, visual communication, family media sharing, games and other interactiv

11、e services for the end user, which requires the operating system of network set-top box with intelligent, open, universal and powerful third party software support. But the current main operating system of the network se

12、t-top box is embedded LINUX system, in essence, it is a underlying, non-intelligent operating system, so application software is limited to the developers of LINUX, and the compatibility is not good. Internet giant Googl

13、e Corporation launching Android4.0 system on October 19, 2011 makes the implementation of intelligent network set-top box to become truth. As everyone knows, Android is a software platform and operating system by Google

14、development based on Linux kernel , and the latest version of the Android 4 also support the intelligent mobile phone, tablet computer, TV and other equipment, so Android system equipment will have a truly open and the m