19537966 发表于 2008-11-15 17:13:22

机顶盒原理3

<p class=MsoNormal style="BACKGROUND: white; MARGIN: 0cm 0cm 0pt; WORD-BREAK: break-all; LINE-HEIGHT: 150%; TEXT-ALIGN: left; mso-pagination: widow-orphan; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto" align=left><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">(4)</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">上层应用软件</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">: </span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">执行服务商提供的各种服务功能,如</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">: </span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">电子节目指南、准视频点播、数据广播、</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">IP</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">电话和可视电话等。上层应用软件独立于</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">STB</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">的硬件,它可以用于各种</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">STB</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">硬件平台,消除应用软件对硬件的依赖。</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <br /></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  机顶盒发展趋势</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <br /></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  </span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">1. </span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">硬件平台</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <br /></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  从机顶盒发展趋势看,</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">Tuner</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">和解调芯片合二为一,物理上减小体积,降低成本,提高性能</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">; </span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">或者采用芯片实现</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">Tuner </span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">的功能。</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <br /></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  由于</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">CPU</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">与</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">TS</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">流解复用器,</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">MPEG<?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:chmetcnv w:st="on" UnitName="a" SourceValue="2" HasSpace="True" Negative="True" NumberType="1" TCSC="0">-2 A</st1:chmetcnv>/V</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">解码器,视频编码器集成,形成</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">STB </span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">的核心芯片,它的发展速度将决定机顶盒未来的方向。必然的趋势是</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">CPU</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">处理速度越来越快,存储器容量越来越大,</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">MPEG</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">解码器将同时支持多路节目的解码</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">; </span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">同时用户可以直接看到的图形显示界面将从简单的</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">OSD</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">,发展到强大的</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">2D</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">、</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">3D</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">图形引擎。</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <br /></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  由于有线电视网络较好的传输质量以及电缆调制解调器技术的成熟,可以实现各种交互式应用。通过上行通道和机顶盒,观众坐在家中就能享受到视频点播</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">(VOD)</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">、网上冲浪、远程购物、交互游戏等增值业务。这种交互性将极大地改变人们看电视的方式。因此,双向传输方案将成为机顶盒发展的主流。</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <br /></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  外部接口将更加丰富,通过</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">USB</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">口可以实现和数码相机的连接,通过</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">IDE</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">接口可以挂接硬盘实现节目存储等等。</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <span lang=EN-US><br /></span></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  机顶盒是网络的终端产品,现实中存在着通信网、计算机网和广播电视网。虽说三网合一是必然趋势,而且三网在骨干网的传输技术上已经融合。最终将数字机顶盒发展成为家庭网关,将机顶盒与</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">PC</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">、打印机、</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">DVD</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">机等数字设备连接起来,并通过双向模块与</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">Internet</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">相连,真正地成为信息家电。</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <br /></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  </span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">2. </span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">软件平台</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt"> <br /></span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">  有线电视网络数字化改造的不断深入,开放式业务系统的广泛使用,运营商的利润增长点将从以前靠收视费和广告费转向靠多种应用去支撑。因此,机顶盒将支持越来越多的应用,如电子节目指南、</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">PPV</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">节目、</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">IPPV</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">节目、准视频点播、数据广播、</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">Internet</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">接入、电子邮件、视频点播以及</span><span lang=EN-US style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-font-kerning: 0pt">IP</span><span style="FONT-SIZE: 12pt; COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-font-kerning: 0pt">电话和可视电话等。而上述应用的发展,必须依靠机顶盒的软件平台,也就是中间件。因此,机顶盒的发展趋势在很大程度上依靠中间件技术的发展方向。</span><span lang=EN-US style="COLOR: #666666; LINE-HEIGHT: 150%; FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></span></p>
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