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clearfix"><h1>沈陽高清數(shù)字電視系統(tǒng) 誠(chéng)信為本上海熊貝信息技術(shù)供應(yīng)</h1><div id="wovcjvc" class="proBig"><div id="h2ool3o" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364164375000/8011521.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="a8ypmt2" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364164375000/8011521.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8wnaho9" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>沈陽高清數(shù)字電視系統(tǒng),電視系統(tǒng)工程</p><p><span>***更新：</span>2021-01-10 05:18:45</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="cu3dpgk" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海熊貝信息技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>唐繼兵</p><p><span>郵箱: </span>tangjibing988428@163.com</p><p><span>電話: </span>19901672612</p><p><span>傳真: </span>199_</p><p><span>網(wǎng)址: </span>http://www.shxiongbei.com</p><p><span>手機(jī): </span>199-0167</p><p><span>地址: </span>青村鎮(zhèn)青村南路355號(hào)5幢135室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="zhofhtx" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="m2qx3ik" class="box"><p><p style="text-indent:25px">電視系統(tǒng)工程對(duì)圖文，電視編輯和播出等模擬電視前端設(shè)備主要包括衛(wèi)星數(shù)字電視接收機(jī).電視調(diào)制器.頻道變換器.頻道處理器.寬帶混合器.信號(hào)放大器.信號(hào)分配器.光發(fā)射機(jī)，沈陽高清數(shù)字電視系統(tǒng).光放大器，沈陽高清數(shù)字電視系統(tǒng).光分路器.光接收機(jī)及需要傳輸置辦的設(shè)備等.模擬電視前端設(shè)備的調(diào)試。前端設(shè)備調(diào)試主要是測(cè)量調(diào)整頻道信號(hào)電平。其他指標(biāo)一般在出廠前已經(jīng)只是調(diào)試，沈陽高清數(shù)字電視系統(tǒng)。不需要再調(diào)整。傳統(tǒng)數(shù)字電視前端。系統(tǒng)采用基的傳輸方式。這種方式已經(jīng)發(fā)展且使用很長(zhǎng)時(shí)間。技術(shù)比較成熟。隨著數(shù)字電視內(nèi)容的增多和新興業(yè)務(wù)的發(fā)展。電視系統(tǒng)工程對(duì)于軟件開發(fā)者比較容易地研發(fā)各種程序應(yīng)用。沈陽高清數(shù)字電視系統(tǒng)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="沈陽高清數(shù)字電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364164375000/8011521.png"></div><p style="text-indent:25px">電視系統(tǒng)工程的采樣：將時(shí)間和幅度上連續(xù)的模擬信號(hào)轉(zhuǎn)變?yōu)闀r(shí)間離散的信號(hào)，即時(shí)間離散化。電視信號(hào)數(shù)字化采樣頻率的選擇首先應(yīng)滿足奈奎斯特抽樣定理，即取樣頻率必須大于信號(hào)帶寬的兩倍，才能從采樣信號(hào)中完全恢復(fù)原信號(hào)。對(duì)于數(shù)字分量編碼信號(hào)的采樣，CCIR601建議亮度采樣頻率為525/59.94和625/50兩大制式行頻的較小公倍數(shù)2.25MHz的6倍，即13.5MHz。對(duì)現(xiàn)行電視制式而言，亮度信號(hào)的較大帶寬是6MHz，13.5MHz>2×6MHz=12MHz，所以它符合奈奎斯特定理。而色差信號(hào)的帶寬比亮度信號(hào)窄得多，所以在分量編碼時(shí)兩個(gè)色差信號(hào)的取樣頻率可以低一些。沈陽高清數(shù)字電視系統(tǒng)電視系統(tǒng)工程與醫(yī)院HIS對(duì)接后，提醒服務(wù)能為醫(yī)院護(hù)士及時(shí)了解每個(gè)入住的患者病情情況，用藥時(shí)間。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="沈陽高清數(shù)字電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364018642578/1274226.png"></div><p style="text-indent:25px">智能電視系統(tǒng)工程的技術(shù)：顯示技術(shù)。電視機(jī)的顯示屏從當(dāng)初的CRT（顯像管），經(jīng)過LCD和PDP技術(shù)，如今市場(chǎng)上的智能電視主要使用LED背光液晶電視。LCD的構(gòu)造是在兩片平行的玻璃當(dāng)中放置液態(tài)的晶體，兩片中間有許多垂直和水平的細(xì)小電線，透過通電與否來控制桿狀水晶分子改變方向，將光線折射出來產(chǎn)生畫面。LCD按照背光源的類型可分成：CCFL背光源LCD；LED背光源LCD。LCD出現(xiàn)之初主要使用CCFL背光源，出于提升畫質(zhì)的目的，制造廠商現(xiàn)在開始逐漸采用LED做為液晶電視的。</p><p style="text-indent:25px">電視系統(tǒng)工程主要由信號(hào)源、前端、干線傳輸和用戶分配網(wǎng)絡(luò)組成。信號(hào)源接收部分的主要任務(wù)是向前端提供系統(tǒng)欲傳輸?shù)母鞣N信號(hào)。它一般包括開路電視接收信號(hào)、調(diào)頻廣播、地面衛(wèi)星、微波以及有線電視臺(tái)自辦節(jié)目等信號(hào)。系統(tǒng)的前端部分的主要任務(wù)是將信號(hào)源送來的各種信號(hào)進(jìn)行濾波、變頻、放大、調(diào)制、混合等，使其適用于在干線傳輸系統(tǒng)中進(jìn)行傳輸。系統(tǒng)的干線傳輸部分主要任務(wù)是將系統(tǒng)前端部分所提供的高頻電視信號(hào)通過傳輸媒體不失真地傳輸給分配系統(tǒng)。其傳輸方式主要有光纖、微波和同軸電纜三種。用戶分配系統(tǒng)的任務(wù)是把從前端傳來的信號(hào)分配給千家萬戶，它是由支線放大器、分配器、分支器、用戶終端以及它們之間的分支線、用戶線組成。電視系統(tǒng)工程便于與通信和計(jì)算機(jī)融合，有利于構(gòu)成國(guó)家信息高速傳輸網(wǎng)一種終端。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="沈陽高清數(shù)字電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364081054688/8057903.png"></div><p style="text-indent:25px">有線電視系統(tǒng)工程的基礎(chǔ)知識(shí)：1.用戶盒：用戶終端是CATV分配系統(tǒng)與用戶電視機(jī)相連的部件。面板分為單輸出孔和雙輸出孔(TV、FM)，在雙輸出孔電路中要求TV和FM輸出間有一定的隔離度，以防止相互干擾。為了安全而在兩處電纜芯線之間接有高壓電容器。2.分支器：分支器通常用于較高電平的饋電干線中，它能以較小的插入損耗從干線取出部分信號(hào)供給住宅樓或用戶，有時(shí)也可用二分支干線提供信號(hào)電平,通過分支器的電視信號(hào)其中一小部分從分支端輸出，大部分功率繼續(xù)沿干線傳輸。電視系統(tǒng)工程在我國(guó)得到了飛速的發(fā)展和完善。沈陽高清數(shù)字電視系統(tǒng)</p><p style="text-indent:25px">電視系統(tǒng)工程滿足電影、電視劇等高清播放的請(qǐng)求。沈陽高清數(shù)字電視系統(tǒng)</p><p style="text-indent:25px">電視系統(tǒng)工程的電視直播可以支持?jǐn)?shù)字電視直播，衛(wèi)星電視直播，以及活動(dòng)或會(huì)議視頻直播等。提供時(shí)移電視，更好的為用戶提供回看電視內(nèi)容的服務(wù)。電視系統(tǒng)工程還提供更加方便快捷信息。電視系統(tǒng)工程還提供更加方便快捷的天氣、新聞、航班、旅游、美食、購(gòu)物、服務(wù)指南、餐飲技師預(yù)定、呼叫服務(wù)、信息留言以及滾動(dòng)字幕等酒店信息服務(wù)。同時(shí)提供商可在電視界面中添加其他商業(yè)的廣告，增加廣告收益；提供商也可以隨時(shí)將一些重要的、緊急的信息顯示在用戶的電視屏幕上，而不用再打電話通知，節(jié)省了費(fèi)用，提高了效率。沈陽高清數(shù)字電視系統(tǒng)</p></p><br 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