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id="8ydam8t" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364212617188/7261726.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="dszbyno" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364212617188/7261726.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="q8btvnf" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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)品關鍵詞：</span>南昌有線電視系統(tǒng),電視系統(tǒng)工程</p><p><span>***更新：</span>2020-11-08 07:25:18</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="peldfbd" 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: </span>199-0167</p><p><span>地址: </span>青村鎮(zhèn)青村南路355號5幢135室</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="bl73qp3" class="page-proshow02"><p class="title">詳細說明</p><div id="78rt8jb" class="box"><p><p style="text-indent:25px">有線電視系統(tǒng)工程的基礎知識：1.用戶盒：用戶終端是CATV分配系統(tǒng)與用戶電視機相連的部件。面板分為單輸出孔和雙輸出孔(TV、FM)，南昌有線電視系統(tǒng)，在雙輸出孔電路中要求TV和FM輸出間有一定的隔離度，南昌有線電視系統(tǒng)，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，南昌有線電視系統(tǒng)。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供給住宅樓或用戶，有時也可用二分支干線提供信號電平,通過分支器的電視信號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。社會的進步與科學技術的發(fā)展很大程度上促進了電視系統(tǒng)工程的發(fā)展。南昌有線電視系統(tǒng)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南昌有線電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364212617188/7261726.png"></div><p style="text-indent:25px">電視系統(tǒng)工程的量化：將幅度連續(xù)信號轉(zhuǎn)換為幅度離散的信號，即幅度離散化。電視系統(tǒng)工程通過采樣，把模擬信號變?yōu)闀r間上離散的脈沖信號。這些脈沖信號的幅度仍然是模擬的，因此還必須對模擬幅度進行離散化處理，才能用數(shù)碼來表示其幅值。這種對幅值進行分級，并按每級進行舍零取整的過程叫作量化。采樣頻率越高，量化比特數(shù)越大，數(shù)碼率就越高，所需傳輸設施的帶寬則越寬。在目前各廠商生產(chǎn)的數(shù)字化視頻設備中，較高的量化比特數(shù)是12。南昌有線電視系統(tǒng)電視系統(tǒng)工程的發(fā)展引起了相關人員的特別重視。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南昌有線電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364018642578/1274226.png"></div><p style="text-indent:25px">電視系統(tǒng)工程的優(yōu)點：1、可以采用糾錯編碼技術提高電視機的抗噪聲干擾能力。2、數(shù)字電路成本低，無需調(diào)整、調(diào)諧，不會老化，所以生產(chǎn)成本降低，維修也容易。3、單向傳播。在進行廣播電視數(shù)據(jù)傳播的時候，數(shù)字電視不需要使用許多附帶的其他組播技術的交換或者路由設備等等。在傳輸?shù)倪^程中，也不會因為信號所覆的用戶較多、覆蓋范圍較廣，而影響傳輸?shù)木W(wǎng)絡信號穩(wěn)定性。它不會在傳輸中受到網(wǎng)絡中帶寬壓力的影響，同時也不會被程序員進行攻擊。</p><p style="text-indent:25px">電視掃描系統(tǒng)工程包括同步電路、行掃描電路、場掃描電路、顯像管及其供電電路。掃描系統(tǒng)的主要作用是使顯像管的熒光屏上形成正常的光柵。幅度分離電路利用同步信號在全電視信號中幅度較高的特點，把復合同步信號取出來積分電路利用場同步信號的寬度遠遠小于行同步信號寬度的特點，將場同步信號從復合同步信號中分離出來，去控制場掃描電路，實現(xiàn)電視場掃描同步。積分電路的分離方式也稱寬度分離AFC電路作用是自動實現(xiàn)行同步。原理是將行同步信號從復合同步信號中取出，與本機行輸出級反饋回來的行頻鋸齒鍍信號進行比較，然后輸出誤差控制電壓去調(diào)整行掃描的頻率和相位，實現(xiàn)行電視同步電路。網(wǎng)絡信息技術的發(fā)展可以推動廣播電視系統(tǒng)工程的更好發(fā)展。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="南昌有線電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364331757813/7386371.png"></div><p style="text-indent:25px">電視系統(tǒng)工程信號從點到面順序取樣、傳送和復現(xiàn)是靠掃描來完成。各國的電視掃描制式不盡相同，在中國是每秒25幀，每幀625行。每行從左到右掃描，每幀按隔行從上到下分奇數(shù)行、偶數(shù)行兩場掃完，用以減少閃爍感覺。掃描過程中傳送圖像信息，當掃描電子束從上一行正程結束返回到下一行起始點前的行逆程回掃線，以及每場從上到下掃完，回到上面的場逆程回掃線均應予以消隱。在行場消隱期間傳送行場同步信號，使收、發(fā)的掃描同步，以準確地重現(xiàn)原始圖像。智能電視系統(tǒng)工程具備開放式操作系統(tǒng)與芯片。深圳灑店的電視系統(tǒng)</p><p style="text-indent:25px">電視系統(tǒng)工程可以接收并回放從互聯(lián)網(wǎng)獲得的各種影像、音樂等數(shù)據(jù)流。南昌有線電視系統(tǒng)</p><p style="text-indent:25px">醫(yī)院電視系統(tǒng)工程的功能：可通過主機時間程序設定操作，可對系統(tǒng)內(nèi)的部分設備進行分時控制,如:醫(yī)院有的區(qū)域夜間不需要監(jiān)控，那就可從軟件編程設置，來自動控制這部分的監(jiān)控設備不讓在夜間工作。這樣，完全可以減少設備不必要的運行,從而達到有效節(jié)能的效果。系統(tǒng)的操作和編程均用符合人體工程學的全功能鍵盤完成。在鍵盤上，可以為操作人員設置不同的優(yōu)先級別，并可限制某些操作人員對某些功能的控制，從而增強了系統(tǒng)的靈活性和安全性。南昌有線電視系統(tǒng)</p><p style="text-indent:25px">上海熊貝信息技術有限公司屬于安全、防護的高新企業(yè)，技術力量雄厚。是一家有限責任公司（自然）企業(yè)，隨著市場的發(fā)展和生產(chǎn)的需求，與多家企業(yè)合作研究，在原有產(chǎn)品的基礎上經(jīng)過不斷改進，追求新型，在強化內(nèi)部管理，完善結構調(diào)整的同時，良好的質(zhì)量、合理的價格、完善的服務，在業(yè)界受到寬泛好評。以滿足顧客要求為己任；以顧客永遠滿意為標準；以保持行業(yè)優(yōu)先為目標，提供***的IPTV電視系統(tǒng)，監(jiān)控系統(tǒng)，弱電工程。上海熊貝自成立以來，一直堅持走正規(guī)化、專業(yè)化路線，得到了廣大客戶及社會各界的普遍認可與大力支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1900923.html</p></div></div></div></div></div><div id="akhz2mo" class="page-right twoColRt"><div id="ncelszw" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="gq32lsz" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="aurovcz" class="recomPic 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