“4K電視(shi)”,是(shi)指(zhi)屏幕分辨率達到(dao)3840x2160或以上的(de)(de)(de)電視(shi),按照(zhao)國(guo)際通(tong)訊聯盟(meng)(ITU)定義(yi)的(de)(de)(de)標準,4K的(de)(de)(de)分辨率為3840*2160,長寬比(bi)為16:9。按照(zhao)這(zhe)個(ge)標準,該(gai)規格下(xia)顯示設(she)備的(de)(de)(de)逐行掃(sao)描線可達到(dao)2160,即2160P。標準的(de)(de)(de)4K分辨率下(xia),像(xiang)素(su)密(mi)度能夠達到(dao)高清(qing)分辨率1920*1080的(de)(de)(de)4倍。這(zhe)四倍的(de)(de)(de)提升將導致彩電行業的(de)(de)(de)一次大改革。
4K電視且能接(jie)收、解碼、顯示相應分辨率(lv)視頻信號的(de)電視。
現在屏(ping)幕尺(chi)寸更(geng)大的平(ping)板電視與(yu)桌面顯示(shi)器已經進入了4K UHD超高清時代,是(shi)之前(qian)(qian)1080p全高清分辨率(lv)的4倍,即總(zong)像素數量達(da)到(dao)了以前(qian)(qian)的4倍。
4K電(dian)(dian)(dian)視(shi)(shi)要先從4K顯(xian)示(shi)技(ji)術說起(qi)。這是(shi)好萊塢電(dian)(dian)(dian)影(ying)(ying)制片商發布的(de)一(yi)(yi)種新的(de)數字電(dian)(dian)(dian)影(ying)(ying)分(fen)(fen)辨(bian)(bian)(bian)率(lv),是(shi)一(yi)(yi)種分(fen)(fen)辨(bian)(bian)(bian)率(lv)更高的(de)超高清(qing)顯(xian)示(shi)規格,4K的(de)名稱得自其橫向分(fen)(fen)辨(bian)(bian)(bian)率(lv)約為4000像(xiang)素(pixel)。4K是(shi)借用(yong)了投影(ying)(ying)機顯(xian)示(shi)分(fen)(fen)辨(bian)(bian)(bian)率(lv)的(de)概念。主流商務教育投影(ying)(ying)機的(de)分(fen)(fen)辨(bian)(bian)(bian)率(lv)為1024×768,而(er)720P家用(yong)投影(ying)(ying)機分(fen)(fen)辨(bian)(bian)(bian)率(lv)為1280×800,順理(li)可(ke)稱為1.3K,全(quan)高清(qing)1920×1080也(ye)就(jiu)被(bei)定義(yi)為1.9K。因此4K電(dian)(dian)(dian)視(shi)(shi)就(jiu)是(shi)平板(ban)電(dian)(dian)(dian)視(shi)(shi)顯(xian)示(shi)分(fen)(fen)辨(bian)(bian)(bian)率(lv)的(de)水平像(xiang)素點(dian)達到1024的(de)4倍,即分(fen)(fen)辨(bian)(bian)(bian)率(lv)為4096×2160。達到這一(yi)(yi)分(fen)(fen)辨(bian)(bian)(bian)率(lv)的(de)平板(ban)電(dian)(dian)(dian)視(shi)(shi),統稱為4K電(dian)(dian)(dian)視(shi)(shi)。
4K分(fen)辨(bian)(bian)率(lv)即4096×2160的像(xiang)素分(fen)辨(bian)(bian)率(lv),它(ta)是2K投影機和(he)高(gao)清電(dian)視(shi)(shi)(shi)分(fen)辨(bian)(bian)率(lv)的4倍(bei),屬于超高(gao)清分(fen)辨(bian)(bian)率(lv)。在(zai)此分(fen)辨(bian)(bian)率(lv)下,觀眾將可以(yi)看清畫面中的每一(yi)(yi)個細節,每一(yi)(yi)個特寫。4K電(dian)視(shi)(shi)(shi)就(jiu)是采用4K分(fen)辨(bian)(bian)率(lv)的電(dian)視(shi)(shi)(shi)機,作為(wei)新一(yi)(yi)代電(dian)視(shi)(shi)(shi)產(chan)品(pin),4K電(dian)視(shi)(shi)(shi)采用新一(yi)(yi)代高(gao)清4K技術和(he)超大屏幕。
4K電(dian)(dian)(dian)(dian)(dian)視(shi)(shi)就是(shi)平板電(dian)(dian)(dian)(dian)(dian)視(shi)(shi)顯示分辨(bian)率(lv)的(de)(de)(de)水平像素點達(da)到1024的(de)(de)(de)4倍,即分辨(bian)率(lv)為(wei)4096×2160。也就是(shi)說,達(da)到這一分辨(bian)率(lv)的(de)(de)(de)平板電(dian)(dian)(dian)(dian)(dian)視(shi)(shi),可以統稱(cheng)為(wei)4K電(dian)(dian)(dian)(dian)(dian)視(shi)(shi)。國(guo)內也有(you)(you)生產4K電(dian)(dian)(dian)(dian)(dian)視(shi)(shi)的(de)(de)(de)品牌,比如TCL的(de)(de)(de)新品E5690,就主打超(chao)(chao)高清(qing)4K,別的(de)(de)(de)牌子如創維,康佳也有(you)(you)4K電(dian)(dian)(dian)(dian)(dian)視(shi)(shi),國(guo)外三星、LG也有(you)(you)4K電(dian)(dian)(dian)(dian)(dian)視(shi)(shi),但現在(zai)4K產品參差不齊(qi),要想挑(tiao)到好的(de)(de)(de)4K超(chao)(chao)高清(qing)電(dian)(dian)(dian)(dian)(dian)視(shi)(shi),可以參考中(zhong)國(guo)電(dian)(dian)(dian)(dian)(dian)子商會和國(guo)家廣播電(dian)(dian)(dian)(dian)(dian)視(shi)(shi)產品監督(du)檢驗中(zhong)心聯(lian)合公布的(de)(de)(de)《4K超(chao)(chao)高清(qing)電(dian)(dian)(dian)(dian)(dian)視(shi)(shi)選購標準》
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