[转帖]STiMi技术详解

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标题： [转帖]STiMi技术详解

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[转帖]STiMi技术详解

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<p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 12pt; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span lang="EN-US" style="FONT-FAMILY: Arial; mso-font-kerning: 0pt;">STiMi</span><span style="FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">技术详解</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"> </span> <p class="MsoNormal" align="left" style="MARGIN: 0cm 0cm 0pt; TEXT-ALIGN: left; mso-pagination: widow-orphan;"><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">　移动多媒体广播</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">(</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">俗称</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">“</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">手持电视</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">”)</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">，已经成为目前炙手可热的发展热点。移动多媒体广播业务是指通过卫星和地面无线广播方式，在手机、</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">PDA</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">、</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">MP3</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">、</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">MP4</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">、数码相机、笔记本电脑等七寸以下的小屏幕、移动便携手持式终端上，实现随时随地接收广播电视节目收视与信息服务。根据权威机构的预测，到</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">2008</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">年全球的手持移动娱乐和多媒体业务的收入将达到</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">820</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">亿美元，如此巨大的市场刺激了移动多媒体广播技术的快速发展。</span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">通信培训</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">,</span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">通信资料</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">,<chmetcnv unitname="g" sourcevalue="3" hasspace="False" negative="False" numbertype="1" tcsc="0" wst="on"></chmetcnv><chmetcnv></chmetcnv>3G<chmetcnv></chmetcnv><chmetcnv></chmetcnv></span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">培训</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">,</span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">职业认证</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">,</span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">通信技术</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">,</span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">通信人才</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">,{ </span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"> <chsdate wst="on" year="2006" month="10" day="24" islunardate="False" isrocdate="False"></chsdate><chsdate></chsdate>2006<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial;"><span lang="EN-US">年</span></span>10<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial;"><span lang="EN-US">月</span></span>24<span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial;"><span lang="EN-US">日</span></span><chsdate></chsdate><chsdate></chsdate><span lang="EN-US" style="FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial;">，国家广电总<span lang="EN-US">局正式颁布了中国移动多媒体广播系统</span></span>(</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">简称</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">“CMMB”)</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">广播信道行业标准《</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">GY/T 220.1-2006 </span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">移动多媒体广播</span><span style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"> </span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">第</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">1</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">部分：广播信道帧结构、信道编码和调制》，确定了采用我国自主研发的移动多媒体广播传输技术</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">(</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">该技术简称</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">“STiMi”)</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">。目前国际上还没有形成统一的移动多媒体广播标准，正处于大规模应用的前期，因此该标准的及时出台，对我国移动多媒体广播和民族工业的发展具有重要意义。</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"> </span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">,</span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">职业认证</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">,</span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">通信</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"> </span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">　</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">1.CMMB</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">体系架构</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-font-kerning: 0pt;">&~5[</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"> CMMB</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">系统是利用大功率</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">S</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">波段卫星信号覆盖全国范围、利用地面增补转发器同频同时同内容转发卫星信号，补点覆盖卫星信号盲区、利用无线移动通信网络构建回传通道，组成单向广播和双向交互相结合的移动多媒体广播网络。系统架构和组成如图</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;">1</span><span style="FONT-FAMILY: 宋体; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial;">所示。　　</span><span lang="EN-US" style="FONT-FAMILY: Arial; mso-bidi-font-size: 10.5pt; mso-font-kerning: 0pt;"> </span><span lang="EN-US" style="FONT-SIZE: 9pt; COLOR: #333333; FONT-FAMILY: Tahoma;"><shapetype id="_x0000_t75" stroked="f" filled="f" path="m@4@5l@4@11@9@11@9@5xe" coordsize="21600,21600" ospt="75" opreferrelative="t"></shapetype><shapetype></shapetype><stroke joinstyle="miter"></stroke><stroke></stroke><stroke></stroke><stroke></stroke><formulas></formulas><formulas></formulas><f eqn="if lineDrawn pixelLineWidth 0"></f><f></f><f></f><f></f><f eqn="sum @0 1 0"></f><f></f><f></f><f></f><f eqn="sum 0 0 @1"></f><f></f><f></f><f></f><f eqn="prod @2 1 2"></f><f></f><f></f><f></f><f eqn="prod @3 21600 pixelWidth"></f><f></f><f></f><f></f><f eqn="prod @3 21600 pixelHeight"></f><f></f><f></f><f></f><f eqn="sum @0 0 1"></f><f></f><f></f><f></f><f eqn="prod @6 1 2"></f><f></f><f></f><f></f><f eqn="prod @7 21600 pixelWidth"></f><f></f><f></f><f></f><f eqn="sum @8 21600 0"></f><f></f><f></f><f></f><f eqn="prod @7 21600 pixelHeight"></f><f></f><f></f><f></f><f eqn="sum @10 21600 0"></f><f></f><f></f><f></f><formulas></formulas><formulas></formulas><path gradientshapeok="t" oextrusionok="f" oconnecttype="rect"></path><path></path><path></path><path></path><lock aspectratio="t" vext="edit"></lock><lock></lock><lock></lock><lock></lock><shapetype></shapetype><shapetype></shapetype><shape id="_x0000_i1026" alt="" type="#_x0000_t75" style="WIDTH: 300pt; 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mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"><img src="http://www.mwhrf.com/UploadFile/2007-9/200791715361753475.jpg" border="0" alt=""/> </span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">图</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">1</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">：</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">CMMB</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">系统框图</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"> </span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">欢迎光临摩托罗拉工程学院（</span><span lang="EN-US" style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">MEI</span><span style="FONT-SIZE: 1pt; COLOR: white; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">）论坛，专业的通信资源</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;"> </span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">　　</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">CMMB</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">系统针对我国幅员辽阔、传输环境复杂、东部地区城市密集西部稀疏、用户众多和业务需求多样化的特点，立足我国国情，吸纳成熟先进技术而设计的</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">“</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">天地一体</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">”</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">系统。这一系统可以低成本、快速地实现移动多媒体广播信号在全国的覆盖，促进东西部</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">“</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">数字鸿沟</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">”</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">的弥合。</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">CMMB</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">系统采用的</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: Arial; mso-fareast-font-family: 宋体; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">STiMi</span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-ascii-font-family: Arial; mso-hansi-font-family: Arial; mso-bidi-font-family: Arial; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA;">传输技术充分考虑了在我国开展移动多媒体广播的需求和特点，是一项具有先进性、实用性和经济性的自主技术。</span> <div align="right"><font color="#000066">[此贴子已经被作者于2007-9-17 15:36:56编辑过]</font></div>
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