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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>廣東多卡聚合路油器,導(dǎo)播切換臺(tái)</p><p><span>***更新：</span>2020-10-15 08:07:07</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="azfflna" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市中科致遠(yuǎn)數(shù)字技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>彭先生</p><p><span>郵箱: </span>SZKCE@126.COM</p><p><span>電話: </span>13267148828</p><p><span>傳真: </span>0755_66632010</p><p><span>網(wǎng)址: </span>https://www.yuanvideo.com</p><p><span>手機(jī): </span>0755-66632010</p><p><span>地址: </span>深圳市寶安區(qū)西鄉(xiāng)街道寶民二路一號(hào)浩泰大廈802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="xmlwtvx" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="zhdqczt" class="box"><p><p style="text-indent:25px">導(dǎo)播切換臺(tái)同步信號(hào)發(fā)生器：同步信號(hào)發(fā)生器在導(dǎo)播切換臺(tái)中主要完成以下幾種功能:①為黑場(chǎng)發(fā)生器、彩底發(fā)生器等提供基準(zhǔn)信號(hào)。其中黑場(chǎng)和彩底信號(hào)可作為字幕、邊框著色或換幕等使用。②受演播中心的同步機(jī)控制并與之，同步鎖相。③在沒(méi)有演播中心同步機(jī)的系統(tǒng)中，廣東多卡聚合路油器，通過(guò)黑場(chǎng)發(fā)生器產(chǎn)生的黑場(chǎng)信號(hào)，為信號(hào)源的同步機(jī)，廣東多卡聚合路油器、時(shí)基校正器等提供基準(zhǔn)并與它們同步鎖相。有些導(dǎo)播切換臺(tái)沒(méi)有同步信號(hào)發(fā)生器，廣東多卡聚合路油器，需要外接同步機(jī)才能工作。在數(shù)字切換臺(tái)中，同樣需要模擬切換臺(tái)上的同步信號(hào)發(fā)生器，這是因?yàn)樵跀?shù)字系統(tǒng)中仍然使用的模擬同步信號(hào)作為時(shí)間基準(zhǔn)。導(dǎo)播切換臺(tái)兩個(gè)將要進(jìn)行特技變化的信號(hào)，可以分別在兩個(gè)線排上確定。廣東多卡聚合路油器</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東多卡聚合路油器,導(dǎo)播切換臺(tái)" src="https://tyunfile.71360.com/UploadFile/zkzy321/637332973576250000/8333152.png"></div><p style="text-indent:25px">導(dǎo)播切換臺(tái)-劃像：劃像又稱為掃換、電子拉幕或分畫(huà)面特技，它是使一個(gè)畫(huà)面先以一定的形狀、大小出現(xiàn)于另一個(gè)畫(huà)面的某一部分，接著按此形狀使其面積不斷擴(kuò)大，完全取代另一畫(huà)面。也可以這樣說(shuō)，劃像就是整個(gè)屏幕被A、B兩個(gè)畫(huà)面所分割，分割的形狀由特技波形發(fā)生器提供的波形來(lái)決定，而且兩個(gè)分畫(huà)面的相對(duì)面積可通過(guò)拉桿電位器控制。實(shí)現(xiàn)劃像特技的基本原理為實(shí)現(xiàn)劃像特技，可以將視頻信號(hào)A和B分別通過(guò)兩個(gè)門(mén)控放大器后再相加。這兩個(gè)門(mén)控放大器所加的門(mén)控電壓又稱拉幕電壓，它們的波形相同，極性相反，頻率是行頻或場(chǎng)頻的整數(shù)倍。惠州法院庭審系統(tǒng)導(dǎo)播切換臺(tái)的基本功能是從幾個(gè)視頻輸入中選擇一個(gè)合適的視頻素材。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東多卡聚合路油器,導(dǎo)播切換臺(tái)" src="https://tyunfile.71360.com/UploadFile/zkzy321/637332973395595703/9176508.png"></div><p style="text-indent:25px">導(dǎo)播切換臺(tái)-鍵控特技：鍵控又叫摳像，是在一幅圖像中沿一定的輪廓線摳去它的一部分而填入另一幅圖像的特技手段。在電視畫(huà)面上插入字幕、符號(hào)，或以某種較復(fù)雜的圖形、輪廓線來(lái)分割屏幕時(shí)，需要采用鍵控特技。鍵控特技實(shí)質(zhì)上也是一種分割圖像的特技，只是分割屏幕的分界線多為不規(guī)則形狀，例如文字、符號(hào)、復(fù)雜的圖形或某種自然景物等。“摳”與“填”是鍵控技術(shù)實(shí)質(zhì)所在。正常情況下，被摳的圖像是背景圖像，填入的圖像為前景圖像，用來(lái)?yè)溉ケ尘皥D像的電信號(hào)稱為鍵信號(hào)，形成這一鍵信號(hào)的信號(hào)源稱為鍵源。</p><p style="text-indent:25px">導(dǎo)播切換臺(tái)的切換方式可分為兩種:快切和特技切換。從多路輸入信號(hào)中交替選擇一路輸出，在電視屏幕上表現(xiàn)為一個(gè)畫(huà)面迅速變換成另一個(gè)畫(huà)面，這種切換方式通常稱為快切，又稱為硬切換，這是使用較多的一種方式。特技切換是從多路輸入視頻信號(hào)中輸出以某種特定方式混合或互相取代的組合信號(hào)，這種方式在后期制作中經(jīng)常應(yīng)用。從導(dǎo)播切換臺(tái)的使用范圍來(lái)分類，又可分為播出用的切換臺(tái)和節(jié)目制作用的切換臺(tái)兩大類。對(duì)于播出用的導(dǎo)播切換臺(tái)，主要應(yīng)保證工作穩(wěn)定可靠，操作簡(jiǎn)便，有應(yīng)急措施;對(duì)于節(jié)目制作用的導(dǎo)播切換臺(tái)，主要應(yīng)滿足特技效果花樣多、設(shè)備功能全等。導(dǎo)播切換臺(tái)現(xiàn)場(chǎng)制作時(shí)，多臺(tái)攝象機(jī)的視頻信號(hào)全都送現(xiàn)場(chǎng)，在現(xiàn)場(chǎng)即時(shí)進(jìn)行剪輯。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東多卡聚合路油器,導(dǎo)播切換臺(tái)" src="https://tyunfile.71360.com/UploadFile/zkzy321/637332973124755859/3036531.png"></div><p style="text-indent:25px">高清導(dǎo)播切換臺(tái)的應(yīng)用方案：遠(yuǎn)程連線。與遠(yuǎn)程連線提供了兩種方案:多點(diǎn)互動(dòng)方案:采用視頻會(huì)議實(shí)現(xiàn)。IP串流方案:通過(guò)訪問(wèn)遠(yuǎn)程的IP流，結(jié)合調(diào)音臺(tái)混音，實(shí)現(xiàn)遠(yuǎn)程互動(dòng)。后臺(tái)指揮方案。后臺(tái)指揮中心，通過(guò)直播實(shí)時(shí)了解現(xiàn)場(chǎng)情況，常用于審訊、對(duì)現(xiàn)場(chǎng)操作指揮。系統(tǒng)提供以下后臺(tái)指揮方案:**的音頻系統(tǒng)對(duì)現(xiàn)場(chǎng)主審人員指揮（通過(guò)工程實(shí)現(xiàn)），本方案*是音頻通話?；?dòng)會(huì)議方案:采用互動(dòng)視頻會(huì)議，可實(shí)現(xiàn)多點(diǎn)指揮。IP 流遠(yuǎn)程聯(lián)系指揮，本方案常用于審訊、約談，可同時(shí)記錄現(xiàn)場(chǎng)和指揮人員的聲音圖像。導(dǎo)播切換臺(tái)的A母線和B母線是特技變換的預(yù)選信號(hào)線排?；葜莘ㄔ和徬到y(tǒng)</p><p style="text-indent:25px">導(dǎo)播切換臺(tái)在電視屏幕上表現(xiàn)為一個(gè)畫(huà)面迅速變換成另一個(gè)畫(huà)面，這種切換方式通常稱為快切，又稱為硬切換。廣東多卡聚合路油器</p><p style="text-indent:25px">對(duì)輸入導(dǎo)播切換臺(tái)的信號(hào)要求：對(duì)輸入模擬導(dǎo)播切換臺(tái)的信號(hào)要求“三統(tǒng)一”，即時(shí)間統(tǒng)一、相位統(tǒng)-和幅度統(tǒng)一。時(shí)間統(tǒng)一就是要求參加節(jié)目制作的各圖像信號(hào)源及加工過(guò)程中各圖像之間是完全“同步”的，具體來(lái)說(shuō)是指行、場(chǎng)信號(hào)的頻率和相位要一致。對(duì)于兩個(gè)彩色信號(hào)的切換還應(yīng)保證它們的色同步嚴(yán)格同相，也即是相位統(tǒng)一。幅度統(tǒng)一指信號(hào)源的信號(hào)幅度應(yīng)該一致。根據(jù)國(guó)標(biāo)規(guī)定:視頻信號(hào)幅度的比較大值是1VPP，同步頂為-0.3V，白電平為0.7V。對(duì)于數(shù)字導(dǎo)播切換臺(tái)來(lái)說(shuō)，由于它對(duì)輸入信號(hào)的處理方式與模擬切換臺(tái)不同，對(duì)輸入信號(hào)的要求也不相同。廣東多卡聚合路油器</p><p style="text-indent:25px">深圳市中科致遠(yuǎn)數(shù)字技術(shù)有限公司致力于數(shù)碼、電腦，以科技創(chuàng)新實(shí)現(xiàn)***管理的追求。中科致遠(yuǎn)深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提?**的采集卡，視頻編碼器，直播設(shè)備，導(dǎo)播切換臺(tái)。中科致遠(yuǎn)致力于把技術(shù)上的創(chuàng)新展現(xiàn)成對(duì)用戶產(chǎn)品上的貼心，為用戶帶來(lái)良好體驗(yàn)。中科致遠(yuǎn)創(chuàng)始人彭貴濤，始終關(guān)注客戶，創(chuàng)新科技，竭誠(chéng)為客戶提供良好的服務(wù)。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/1562324.html</p></div></div></div></div></div><div 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