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href="http://m.cdcfah.com/cp/second-jydq_dianshiji/">電視機</a>?<a href="http://m.cdcfah.com/cp/third-dianshiji_qtdsj/">其他電視機</a>?上海有線電視系統(tǒng) 來電咨詢上海熊貝信息技術供應</p><div id="gvs888n" class="leftbox clearfix"><h1>上海有線電視系統(tǒng) 來電咨詢上海熊貝信息技術供應</h1><div id="mbtq9x2" class="proBig"><div id="2ut3w27" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361363861396485/775064.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="l8vscj8" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361363861396485/775064.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="oxzrgx9" 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>上海有線電視系統(tǒng),電視系統(tǒng)工程</p><p><span>***更新：</span>2020-10-16 10:12:42</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="lp8fxey" 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="ys37cji" class="page-proshow02"><p class="title">詳細說明</p><div id="vphub89" class="box"><p><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，上海有線電視系統(tǒng)。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，上海有線電視系統(tǒng)。采樣頻率越高，量化比特數(shù)越大，上海有線電視系統(tǒng)，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。智能電視系統(tǒng)工程能夠滿足用戶多樣化和個性化需求的電視產(chǎn)品。上海有線電視系統(tǒng)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海有線電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361363861396485/775064.png"></div><p style="text-indent:25px">電視系統(tǒng)工程的優(yōu)點：1、伴音質(zhì)量高，音域范圍寬。由于采用信息壓縮技術，頻道利用率很高，允許傳送高質(zhì)量、寬帶20Hz～20kHz的音頻信號和雙路立體聲/雙伴音，或者傳送AC-3數(shù)字立體聲、和具有影院音效的伴音。2、數(shù)字電視與模擬電視可實施信道兼容。在同一頻道上可同時傳送模擬電視與數(shù)字電視而互不干擾，既可在原有模擬電視接收機上加裝數(shù)字電視機頂盒，又可在數(shù)字電視機分路處理模擬電視信號，因而擴展了接收信道空間，使用戶得到更多的實惠。安徽電視系統(tǒng)安裝智能電視系統(tǒng)工程具有全開放式平臺，搭載了操作系統(tǒng)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海有線電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364018642578/1274226.png"></div><p style="text-indent:25px">醫(yī)院電視系統(tǒng)工程的特點：1.模塊化設計：系統(tǒng)各單元電路均采用模塊化設計，因此系統(tǒng)的搭接、擴展極為方便、快捷。如需增加切換器的容量，只需增加切換模塊即可。系統(tǒng)能增至 128路視頻輸入，24路視頻輸出。2.系統(tǒng)的高可靠性：支持不斷電熱插拔:模塊化設計，插板式結構，支持不斷電熱插拔，便于系統(tǒng)維護，在供電不穩(wěn)定的情況下(如斷電)不會對設備有影響。支持冗余配置:系統(tǒng)可根據(jù)用戶需要，支持采用雙CPU冗余配置，一旦其中一臺CPU發(fā)生意外故障，系統(tǒng)可自動切換到另一臺CPU，無需停機檢修，提高了系統(tǒng)的可靠性，這就能使系統(tǒng)持續(xù)穩(wěn)定的工作，做到時時刻刻的監(jiān)控。</p><p style="text-indent:25px">電視系統(tǒng)工程的編碼壓縮方法：差值脈沖編碼調(diào)制。標準數(shù)字電視采用的是主類和主級。概括地說，圖像壓縮的原理是利用了圖像中的兩種特性：空間相關性和時間相關性。一幀圖像內(nèi)的任何一個場景都是由若干像素點構成的，因此一個像素通常與它周圍的某些像素在亮度和色度上存在一定的關系，這種關系叫做空間相關性；一個節(jié)目中的一個情節(jié)常常由若干幀連續(xù)圖像組成的圖像序列構成，一個圖像序列中前后幀圖像間也存在一定的關系，這種關系叫做時間相關性。這兩種相關性使得圖像中存在大量的冗余信息。如果我們能將這些冗余信息去除，只傳輸少量非相關信息，就可以極大節(jié)省傳輸頻帶。而接收機利用這些非相關信息，按照一定的解碼算法，可以在保證一定的圖像質(zhì)量的前提下恢復原始圖像。一個好的壓縮編碼方案就是能夠較大限度地去除圖像中的冗余信息。電視系統(tǒng)工程具備較強的硬件設備。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海有線電視系統(tǒng),電視系統(tǒng)工程" src="https://tyunfile.71360.com/UploadFile/shxiongbei/637361364081054688/8057903.png"></div><p style="text-indent:25px">電視系統(tǒng)工程的編碼壓縮方法：降低采樣頻率。降低采樣頻率能夠壓縮碼率，但是，奈奎斯特采樣定理指出，當取樣頻率（fs）小于基帶頻率（fm）的2倍時，頻譜發(fā)生重疊，則采用低通濾波器無法無失真地恢復原信號。由于電視圖像信號的能量主要集中在以行頻及其各次諧波頻率為中心的較窄范圍內(nèi)，中間存在很大的空隙，因此，若把取樣頻率選為半行頻的奇數(shù)倍，就可使fs<2fm時出現(xiàn)的頻譜混迭部分形成半行交錯。于是，可以采用梳狀濾波器將其選出以較小的失真恢復原始信號。電視系統(tǒng)工程具有網(wǎng)絡通信功能。上海有線電視系統(tǒng)</p><p style="text-indent:25px">電視系統(tǒng)工程的發(fā)展引起了相關人員的特別重視。上海有線電視系統(tǒng)</p><p style="text-indent:25px">電視系統(tǒng)工程的采樣：將時間和幅度上連續(xù)的模擬信號轉(zhuǎn)變?yōu)闀r間離散的信號，即時間離散化。電視信號數(shù)字化采樣頻率的選擇首先應滿足奈奎斯特抽樣定理，即取樣頻率必須大于信號帶寬的兩倍，才能從采樣信號中完全恢復原信號。對于數(shù)字分量編碼信號的采樣，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。對現(xiàn)行電視制式而言，亮度信號的較大帶寬是6MHz，13.5MHz>2×6MHz=12MHz，所以它符合奈奎斯特定理。而色差信號的帶寬比亮度信號窄得多，所以在分量編碼時兩個色差信號的取樣頻率可以低一些。上海有線電視系統(tǒng)</p><p style="text-indent:25px">上海熊貝信息技術有限公司總部位于青村鎮(zhèn)青村南路355號5幢135室，是一家從事計算機信息科技領域內(nèi)的技術開發(fā)、技術咨詢、技術服務、技術轉(zhuǎn)讓，弱電工程施工，通訊建設工程施工，電子與智能化建設工程專業(yè)施工，綜合布線，計算機網(wǎng)絡工程施工，設計、制作、代理。電視系統(tǒng)網(wǎng)絡搭建，監(jiān)控安防產(chǎn)品的設計搭建。的公司。上海熊貝深耕行業(yè)多年，始終以客戶的需求為向?qū)В瑸榭蛻籼峁?**的IPTV電視系統(tǒng)，監(jiān)控系統(tǒng)，弱電工程，。上海熊貝始終以本分踏實的精神和必勝的信念，影響并帶動團隊取得成功。上海熊貝創(chuàng)始人唐繼兵，始終關注客戶，創(chuàng)新科技，竭誠為客戶提供良好的服務。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/1578551.html</p></div></div></div></div></div><div id="lf7nzby" class="page-right twoColRt"><div id="dskh8ds" 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