【正文】 .......................................................................7 ......................................................................................................................7 ..................................................................................................................8 ...............................................................................................................................8 ......................................................................................................................8 西安視頻會(huì)議室系統(tǒng)設(shè)備配置 ...............................................................................8 .......................................................................9 .....................................................................................10 .............................................................................10 .................................................................................................11 ........................................................................................................................11 ....................................................................................................................11 ............................................................................................................12 .........................................................................................................13 .............................................................................................13 .........................................................................................................14 .............................................................................................................15 .........................................................................................15 ........................................................................................................16 .....................................................................................17 ............................................................................................................18 .................................................................................................................18 .............................................................................................19 .................................................................................................19 信號(hào)顯示 .......................................................................................................19 .....................................................................................................19 .................................................................................................20 .........................................................................................................20 .........................................................................................................21 音頻擴(kuò)聲系統(tǒng) ....................................................................................................................32 .................................................................................................................32 .................................................................................................................33 .............................................................................................................................33 ....................................................................................................33精選資料可修改編輯 ....................................................................................................................34地市無線電網(wǎng)格化監(jiān)管系統(tǒng)具備通過會(huì)議發(fā)言設(shè)備、攝像、音響擴(kuò)聲和多媒體顯示等手段，將地市無線電管理機(jī)構(gòu)視頻會(huì)議系統(tǒng)接入省級(jí)會(huì)議中心，可在地市無線電網(wǎng)格化監(jiān)管系統(tǒng)指揮中心進(jìn)行業(yè)務(wù)專題報(bào)告、成果展示和工作經(jīng)驗(yàn)交流與學(xué)習(xí)，實(shí)現(xiàn)本地及遠(yuǎn)程之間會(huì)議會(huì)商。所建設(shè)的高清視頻會(huì)議系統(tǒng)要求充分考慮到系統(tǒng)將來的擴(kuò)展性，具有統(tǒng)一管理，維護(hù)簡(jiǎn)單，易于擴(kuò)展等特點(diǎn)，同時(shí)要求有良好的升級(jí)服務(wù)與安全措施，以使得投資利益得到可靠的保護(hù)。會(huì)場(chǎng)聲音絕對(duì)純正，不會(huì)受其它雜音的干擾。聲像時(shí)延小于 秒 是音頻通訊最新一帶的編碼標(biāo)準(zhǔn)，為寬帶 音頻編碼標(biāo)準(zhǔn)，音頻的采樣頻寬可以達(dá)到 20K Hz，而通 訊的帶寬只有 64K，可以提供超 CD 級(jí)的高保真音質(zhì)。各會(huì)場(chǎng)的圖像切換迅速，不會(huì)出現(xiàn)圖像馬賽克現(xiàn)象。傳統(tǒng)的視頻會(huì)議采用 CIF（分辨率 352x288）格式，受點(diǎn)陣數(shù)量的限制，在數(shù)字及線條等精細(xì)顯示方面不盡如人意，遠(yuǎn)遠(yuǎn)不能滿足現(xiàn)在高標(biāo)準(zhǔn)的要求。通信與信息技術(shù)的迅猛發(fā)展正在引發(fā)整個(gè)廣電產(chǎn)業(yè)的變革，數(shù)字媒體是這一變革中的關(guān)鍵環(huán)節(jié)。系統(tǒng)所采用的技術(shù)是當(dāng)今同行業(yè)領(lǐng)域領(lǐng)先的技術(shù)，國(guó)際或國(guó)內(nèi)最先進(jìn)的，保 證系統(tǒng)在一定的時(shí)間內(nèi)不落后；系統(tǒng)設(shè)計(jì)遵循國(guó)際標(biāo)準(zhǔn)和國(guó)內(nèi)有關(guān)的規(guī)范要求，保證系統(tǒng)對(duì)現(xiàn)有設(shè)備/ 網(wǎng)絡(luò)具有強(qiáng)的包容性，并為系統(tǒng)擴(kuò)容升 級(jí)提供技術(shù)保障；符合計(jì)算機(jī)、網(wǎng)絡(luò)通訊技術(shù)和高清視頻會(huì)議技術(shù)的最新發(fā)展潮流，并且是應(yīng)用成熟的系統(tǒng)?？膳c各網(wǎng)絡(luò)進(jìn)行良好的互連互通（例如：數(shù)字專網(wǎng)、 IP 局域網(wǎng)、ISDN 網(wǎng)等）。系統(tǒng)設(shè)計(jì)應(yīng)符合本項(xiàng)目的高清視頻會(huì)議系統(tǒng)工程的實(shí)際需要，注重實(shí)用性、注重系統(tǒng)配置的經(jīng)濟(jì)效應(yīng)，達(dá)到綜合平衡；綜合考慮系統(tǒng)的性能和價(jià)格，性能價(jià)格比在同類系統(tǒng)和條件下達(dá)到最優(yōu)；西安，咸陽視頻會(huì)議顯示系統(tǒng)主要由以下幾部分組成： 西安視頻會(huì)議室系統(tǒng)設(shè)備配置序列 設(shè)備名稱 數(shù)量 備注1 日立高清工程投影機(jī) 1 臺(tái) 日