安徽高清光端機廠家工業(yè)交換機煙臺市正維通信技術(shù)供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="光端機在廣電傳輸中的多種應(yīng)用日常新聞傳送新聞中心技術(shù)系統(tǒng)應(yīng)采用全數(shù)字方案。視/音頻輸入信號由傳輸系統(tǒng)提供，轉(zhuǎn)播主信號全部為SDI信號(嵌入音頻)或視/音頻信號，經(jīng)解嵌或A/D轉(zhuǎn)換后，分配到錄像區(qū)、視/音頻分配矩陣和硬盤網(wǎng)絡(luò)系統(tǒng)。這些信號的切"><meta name="keywords" content="安徽高清光端機廠家,光端機"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center 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href="http://www.cdcfah.com/cp/third-csjhsb_gdjlh/">光端機</a>?安徽高清光端機廠家工業(yè)交換機煙臺市正維通信技術(shù)供應(yīng)</p><div id="33899uf" class="leftbox clearfix"><h1>安徽高清光端機廠家工業(yè)交換機煙臺市正維通信技術(shù)供應(yīng)</h1><div id="nqrd8mn" class="proBig"><div id="z8y8evr" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287996943972/1730711.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="u3lst38" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287996943972/1730711.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ff3xykl" 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>山東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>安徽高清光端機廠家,光端機</p><p><span>***更新：</span>2021-01-28 02:18:28</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="hz32qxy" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">煙臺市正維通信技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>程雷</p><p><span>郵箱: </span>zhengwei@zhengwei-teah.cn</p><p><span>電話: </span>18766381696</p><p><span>傳真: </span>0535_</p><p><span>網(wǎng)址: </span>http://www.zwkj.net.cn</p><p><span>手機: </span>0535-3975176</p><p><span>地址: </span>中國(山東)自由貿(mào)易試驗區(qū)煙臺片區(qū)煙臺開發(fā)區(qū)珠江路42號</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="2gea4w8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="vdzveek" class="box"><p><p style="text-indent:25px">光端機在廣電傳輸中的多種應(yīng)用日常新聞傳送新聞中心技術(shù)系統(tǒng)應(yīng)采用全數(shù)字方案。視/音頻輸入信號由傳輸系統(tǒng)提供，轉(zhuǎn)播主信號全部為SDI信號(嵌入音頻)或視/音頻信號，經(jīng)解嵌或A/D轉(zhuǎn)換后，分配到錄像區(qū)、視/音頻分配矩陣和硬盤網(wǎng)絡(luò)系統(tǒng)。這些信號的切換和調(diào)度管理，由新聞中心的數(shù)字視頻矩陣和模擬矩陣負(fù)責(zé)，然后按照不同的要求，可以直接以SDI信號傳輸給發(fā)射臺或者經(jīng)MPEG-2壓縮編碼后分插到SDH環(huán)網(wǎng)傳輸?shù)绞∨_。微波傳輸微波站->制作中心->演播廳->發(fā)射臺，安徽高清光端機廠家，傳輸系統(tǒng)的設(shè)計和安裝直接影響到信號的傳輸質(zhì)量。目前傳輸系統(tǒng)設(shè)備大部分都是數(shù)字產(chǎn)品，安徽高清光端機廠家，安徽高清光端機廠家。微波站到制作中心之間的信號傳輸采用高寬帶視頻傳輸光端機。光傳輸系統(tǒng)按傳輸信號劃分，可分為數(shù)字傳輸系統(tǒng)和模擬傳輸系統(tǒng)。安徽高清光端機廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽高清光端機廠家,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469287996943972/1730711.png"></div><p style="text-indent:25px">數(shù)據(jù)光端機又叫光modem、E1光端機。在數(shù)字傳輸系統(tǒng)中，有兩種數(shù)字傳輸系列，一種叫"準(zhǔn)同步數(shù)字系列"(PlesiochronousDigitalHierarchy)，簡稱PDH;另一種叫"同步數(shù)字系列"(SynchronousDigitalHierarchy)，簡稱SDH。采用準(zhǔn)同步數(shù)字系列(PDH)的系統(tǒng)，是在數(shù)字通信網(wǎng)的每個節(jié)點上都分別設(shè)置高精度的時鐘，這些時鐘的信號都具有統(tǒng)一的標(biāo)準(zhǔn)速率。盡管每個時鐘的精度都很高，但總還是有一些微小的差別。為了保證通信的質(zhì)量，要求這些時鐘的差別不能超過規(guī)定的范圍。因此，這種同步方式嚴(yán)格來說不是真正的同步，所以叫做"準(zhǔn)同步"。在以往的電信網(wǎng)中，多使用PDH設(shè)備。這種系列對傳統(tǒng)的點到點通信有較好的適應(yīng)性。而隨著數(shù)字通信的迅速發(fā)展，點到點的直接傳輸越來越少，而大部分?jǐn)?shù)字傳輸都要經(jīng)過轉(zhuǎn)接，因而PDH系列便不能適合現(xiàn)代電信業(yè)務(wù)開發(fā)的需要，以及現(xiàn)代化電信網(wǎng)管理的需要。SDH就是適應(yīng)這種新的需要而出現(xiàn)的傳輸體系。安徽高清光端機廠家數(shù)字光端機完全兼容NTSC, PAL,SECAM制式圖像。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽高清光端機廠家,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288899057030/8487397.png"></div><p style="text-indent:25px">關(guān)于模擬光端機與數(shù)字光端機的區(qū)別，可以先了解下數(shù)字信號和模擬信號的區(qū)別，從而容易了解模擬光端機與數(shù)字光端機的區(qū)別了！模擬信號傳輸輸入和輸出處理方式不一樣無論模擬、數(shù)字光端機，對輸入的基帶的視頻、音頻、數(shù)據(jù)信號都必須進(jìn)行處理。對于模擬調(diào)幅光端機視頻、音頻、數(shù)據(jù)的幅度對一高頻載波信號進(jìn)行調(diào)制，使高頻載波信號的幅度隨視頻、音頻、數(shù)據(jù)的幅度變化而光端機對輸入的基帶的視頻、音頻、數(shù)據(jù)進(jìn)行高分辨率的模擬-數(shù)字轉(zhuǎn)換，如1Vp-p幅度范圍的幅度信號利用號來表示，1V等分成4096，因此模數(shù)轉(zhuǎn)換后引起的最大電壓幅度誤差為1/4096V(約2.5mV),此誤差電壓稱各種幅度的電壓數(shù)值從0V、1/4096V、2/4096V...數(shù)字編碼信號直接控制光頭發(fā)射的光信號的強、弱兩種狀態(tài)(對應(yīng)0或再將數(shù)字編碼進(jìn)行數(shù)字-模擬轉(zhuǎn)換，恢復(fù)成原始的基帶的視頻、音頻、數(shù)據(jù)信號。</p><p> <p> 環(huán)網(wǎng)式光端機將各主要節(jié)點連成環(huán)網(wǎng)，并且通過光分支的型式還可以有星型分支，可以做到網(wǎng)絡(luò)拓?fù)涞碾S意性，做到全網(wǎng)信息的共享等許多獨特的功能。 </p> <p> 數(shù)據(jù)光端機多采用TDM和SDM技術(shù)有效的復(fù)用了多種窄帶業(yè)務(wù)，但對于非壓縮視頻的接入突顯不足，為了解決視頻傳輸?shù)膯栴}人們引入了視頻光端機。 </p> <p> 數(shù)據(jù)光端機的作用是將所要傳輸?shù)膱D像、語音以及數(shù)據(jù)信號進(jìn)行數(shù)字化處理，再將這些數(shù)字信號進(jìn)行復(fù)用處理，使多路低速的數(shù)字信號轉(zhuǎn)換成一路高速信號，并將這一信號轉(zhuǎn)換成光信號。 </p> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> 數(shù)字光端機受環(huán)境干擾較小，傳輸質(zhì)量高。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="安徽高清光端機廠家,光端機" src="https://tyunfile.71360.com/WaterMark/UploadFile/zhengwei123/637469288076946112/8930383.png"></div><p style="text-indent:25px">光端機在廣電傳輸中的多種應(yīng)用隨著大通信時代的不斷發(fā)展，廣播電視從模擬向數(shù)字的過渡，數(shù)字化帶給大眾的感受是節(jié)目質(zhì)量提高、節(jié)目更加豐富多彩。現(xiàn)在，人們對電視節(jié)目的需求日益提高，不只是收到電視信號就可以了，還要求完美的畫面和逼真的聲音。這個時候光端機就在這里發(fā)揮重大作用了！因此，先進(jìn)的拍攝數(shù)字化設(shè)備固然重要，但是傳輸設(shè)備對信號起著重大重要，也就是不解決傳輸設(shè)備對信號滯后的這個問題，那么問題就嚴(yán)重了，所以光端機用途的起著非常重要作用總得來說，市級電視臺采用模擬設(shè)備進(jìn)行傳輸，由于元器件的老化而使設(shè)備的不穩(wěn)定因素明顯增加，經(jīng)常造成傳輸中斷，嚴(yán)重影響信號的正常傳輸及質(zhì)量。所以，在充分考慮設(shè)備先進(jìn)性、兼容性、整體配套性的基礎(chǔ)上，信號傳輸系統(tǒng)采取以數(shù)字設(shè)備為主，將具有使用模擬設(shè)備所無法比擬的優(yōu)勢。光纖的模擬傳輸系統(tǒng)是把光強進(jìn)行模擬調(diào)制，其光源的調(diào)制功率隨調(diào)制信號的幅度變化而變化。浙江數(shù)字視頻光端機批發(fā)廠家</p><p style="text-indent:25px">根據(jù)光纖傳輸網(wǎng)絡(luò)拓?fù)湫褪匠蛇x擇傳統(tǒng)的點對點傳輸光端機外，還有節(jié)點式和環(huán)網(wǎng)式光端機可供選擇。安徽高清光端機廠家</p><p style="text-indent:25px">光端機要一對嘛? 總會有新客戶問光端機要一對的嗎？對的，其實光端機是成對使用的。光端機是用在以光纖作為載體的光、電傳換器。發(fā)送端和接收端必須是同一種設(shè)備。為什么要成對使用呢？簡單說光端機是光信號傳輸?shù)慕K端設(shè)備，其實光端機是一個延長數(shù)據(jù)傳輸?shù)墓饫w通信設(shè)備。光端機一般都是成對使用，分為光發(fā)射機和光接收機。光發(fā)射機完成電光轉(zhuǎn)換，并把光信號發(fā)射出去用于光纖傳輸。光接收機主要是把從光纖接收的光信號再還原為電信號，完成光電轉(zhuǎn)換。所以一般光端機是成對使用的。光端機很多類型：PDH光端機、電話光端機、SDH光端機、SPDH光端機、視頻光端機、以太網(wǎng)光端機、音頻光端機、數(shù)據(jù)光端機、VGA/HDMI光端機、HD-SDI光端機。光端機作用就是用于遠(yuǎn)程傳輸數(shù)據(jù)，將音視頻進(jìn)行遠(yuǎn)距離傳輸，具有傳輸距離遠(yuǎn)，無延遲、無干擾等優(yōu)點。安徽高清光端機廠家</p><p style="text-indent:25px">煙臺市正維通信技術(shù)有限公司致力于通信產(chǎn)品，是一家生產(chǎn)型公司。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個細(xì)節(jié)，公司旗下工業(yè)交換機，以太網(wǎng)交換機，環(huán)網(wǎng)交換機，光纖收發(fā)器深受客戶的喜愛。公司將不斷增強企業(yè)重點競爭力，努力學(xué)習(xí)行業(yè)知識，遵守行業(yè)規(guī)范，植根于通信產(chǎn)品行業(yè)的發(fā)展。煙臺正維通信技術(shù)秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br 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