摘要
Abstract
The television production and presentation system has undergone an evolution from black and white to col-or,and from analog to digital.Currently,it is in a stage of rapid development from high definition(HD)to ultra-high defini-tion(UHD).The signal transmission rate of the traditional HD baseband system is only 1.5 Gbps,which is unable to carry 4K/8K UHD signals(48 Gbps@8K,12 Gbps@4K).Moreover,the luminance dynamic range of HD television is only 103,while the human eye's visible range without pupil adjustment is 105.Therefore,UHD television should enhance the lumi-nance dynamic range to 105 in accordance with the human eye's recognition ability.Focusing on the technical challenges such as uncompressed cross-domain multi-address Internet Protocol(IP)switching and high dynamic range(HDR)produc-tion and presentation for UHD,this paper comprehensively introduces the UHD television production and presentation sys-tem and key technologies,with a particular emphasis on the innovative points of UHD IP signal switching,8K UHD video imaging and image processing,video intelligent enhancement,extended reality(XR)virtual-real fusion production,Audio Vivid,heterogeneous network audio-video synchronization transmission,and 4K/8K UHD terminal display,as well as the full-process program production and presentation capabilities of UHD high dynamic characteristics.关键词
超高清/高动态范围/IP信号交换/XR虚实融合制作/三维菁彩声Key words
ultra-high definition/high dynamic range/IP signals exchange/XR virtual and real fusion production/Audio Vivid分类
信息技术与安全科学
