視(shi)(shi)頻(pin)(pin)切(qie)(qie)換(huan)(huan)(huan)器(qi)是組(zu)成(cheng)(cheng)控(kong)(kong)制(zhi)中(zhong)心中(zhong)主(zhu)控(kong)(kong)制(zhi)臺(tai)上(shang)的(de)一(yi)個關(guan)(guan)鍵設備，是選擇(ze)視(shi)(shi)頻(pin)(pin)圖(tu)像(xiang)(xiang)信(xin)(xin)號(hao)(hao)的(de)設備。簡單(dan)地說(shuo)，將幾路(lu)視(shi)(shi)頻(pin)(pin)信(xin)(xin)號(hao)(hao)輸(shu)(shu)(shu)入，通過對(dui)其(qi)(qi)控(kong)(kong)制(zhi)，選擇(ze)其(qi)(qi)中(zhong)一(yi)路(lu)視(shi)(shi)頻(pin)(pin)信(xin)(xin)號(hao)(hao)輸(shu)(shu)(shu)出(chu)。在多(duo)(duo)路(lu)攝(she)像(xiang)(xiang)機組(zu)成(cheng)(cheng)的(de)電(dian)視(shi)(shi)監(jian)控(kong)(kong)系(xi)統中(zhong)，一(yi)般(ban)(ban)沒必要(yao)用(yong)同攝(she)像(xiang)(xiang)機數(shu)量一(yi)樣的(de)監(jian)視(shi)(shi)器(qi)一(yi)一(yi)對(dui)應顯(xian)(xian)示各(ge)路(lu)攝(she)像(xiang)(xiang)機的(de)圖(tu)像(xiang)(xiang)信(xin)(xin)號(hao)(hao)。如果那樣，則成(cheng)(cheng)本高，昆(kun)明視(shi)(shi)頻(pin)(pin)監(jian)控(kong)(kong)設備，操作不方便(bian)(bian)，容易造成(cheng)(cheng)混亂，所以(yi)一(yi)般(ban)(ban)都(dou)是按一(yi)定的(de)比(bi)例(li)用(yong)一(yi)臺(tai)監(jian)視(shi)(shi)器(qi)輪流切(qie)(qie)換(huan)(huan)(huan)顯(xian)(xian)示幾臺(tai)攝(she)像(xiang)(xiang)機的(de)圖(tu)像(xiang)(xiang)信(xin)(xin)號(hao)(hao)。視(shi)(shi)頻(pin)(pin)切(qie)(qie)換(huan)(huan)(huan)器(qi)目前多(duo)(duo)采用(yong)由集成(cheng)(cheng)電(dian)路(lu)做(zuo)成(cheng)(cheng)的(de)模擬開關(guan)(guan)。這種(zhong)形(xing)式(shi)(shi)(shi)切(qie)(qie)換(huan)(huan)(huan)控(kong)(kong)制(zhi)方便(bian)(bian)，便(bian)(bian)于組(zu)成(cheng)(cheng)矩陣(zhen)切(qie)(qie)換(huan)(huan)(huan)形(xing)式(shi)(shi)(shi)。切(qie)(qie)換(huan)(huan)(huan)的(de)控(kong)(kong)制(zhi)信(xin)(xin)號(hao)(hao)可采用(yong)編碼方式(shi)(shi)(shi)。目前所使用(yong)的(de)主(zhu)控(kong)(kong)制(zhi)臺(tai)上(shang)的(de)視(shi)(shi)頻(pin)(pin)切(qie)(qie)換(huan)(huan)(huan)器(qi)，一(yi)般(ban)(ban)都(dou)做(zuo)成(cheng)(cheng)矩陣(zhen)切(qie)(qie)換(huan)(huan)(huan)形(xing)式(shi)(shi)(shi)以(yi)及(ji)積木式(shi)(shi)(shi)。可根據系(xi)統中(zhong)攝(she)像(xiang)(xiang)機的(de)多(duo)(duo)少(shao)以(yi)及(ji)攝(she)像(xiang)(xiang)機對(dui)監(jian)視(shi)(shi)器(qi)的(de)比(bi)例(li)來選用(yong)視(shi)(shi)頻(pin)(pin)切(qie)(qie)換(huan)(huan)(huan)器(qi)的(de)輸(shu)(shu)(shu)入輸(shu)(shu)(shu)出(chu)路(lu)數(shu)及(ji)任意組(zu)成(cheng)(cheng)切(qie)(qie)換(huan)(huan)(huan)比(bi)例(li)。

通常(chang)的(de)電(dian)視(shi)(shi)監(jian)控系(xi)統(tong)規模(mo)都不大(da)(da)，功能也(ye)相對(dui)(dui)簡單，視(shi)(shi)頻(pin)監(jian)控設備廠商，但其適(shi)用(yong)(yong)的(de)范圍(wei)非常(chang)廣。所監(jian)視(shi)(shi)的(de)對(dui)(dui)象也(ye)不限(xian)于想到(dao)的(de)人(ren)、商品、貨物或車輛，有(you)些應(ying)用(yong)(yong)系(xi)統(tong)還涉及到(dao)對(dui)(dui)諸如罐(guan)、高(gao)油(you)墨瓜(gua)爐的(de)監(jian)視(shi)(shi)，另有(you)些應(ying)用(yong)(yong)系(xi)統(tong)則需(xu)要對(dui)(dui)工廠的(de)煙囪及排(pai)污管道進行曲監(jian)視(shi)(shi)。電(dian)視(shi)(shi)監(jian)控系(xi)統(tong)可以(yi)(yi)自(zi)成(cheng)體系(xi)，也(ye)可以(yi)(yi)與防盜報警系(xi)統(tong)或出入口控制(zhi)系(xi)統(tong)組合(he)，構成(cheng)綜合(he)保(bao)安(an)監(jian)控系(xi)統(tong)。一般(ban)來說，典型(xing)中(zhong)小型(xing)電(dian)視(shi)(shi)監(jian)控系(xi)統(tong)的(de)攝像監(jian)視(shi)(shi)點(dian)數不超過32點(dian)，造價大(da)(da)都在幾萬~幾十(shi)萬元

云(yun)臺根據其回(hui)轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)的(de)(de)特點可分為(wei)只(zhi)能(neng)(neng)左右(you)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)的(de)(de)水平(ping)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)云(yun)臺和既能(neng)(neng)左右(you)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)又能(neng)(neng)上下旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)的(de)(de)云(yun)臺。一般來說，水平(ping)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)角(jiao)度(du)為(wei)0°～350°，垂直(zhi)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)角(jiao)度(du)為(wei)+90°。恒速(su)(su)云(yun)臺的(de)(de)水平(ping)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)度(du)一般在(zai)(zai)3°～10°/s，垂直(zhi)速(su)(su)度(du)為(wei)4°/s左右(you)。變速(su)(su)云(yun)臺的(de)(de)水平(ping)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)度(du)一般在(zai)(zai)0°～32°/s，垂直(zhi)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)度(du)在(zai)(zai)0°～16°/s左右(you)。在(zai)(zai)一些高(gao)速(su)(su)攝像系統中(zhong)，云(yun)臺的(de)(de)水平(ping)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)度(du)高(gao)達480°/s以上，垂直(zhi)旋轉(zhuan)(zhuan)(zhuan)(zhuan)(zhuan)速(su)(su)度(du)在(zai)(zai)120°/s以上。