4K超高清和高清电视同播系统的下变换技术探讨

Discussion on the Down-Conversion Technology of 4K UHD and HD TV Co-Broadcast System

当前,我国超高清电视技术发展迅猛,国内多家电视台正在大力推进4K超高清制播体系的建设,因此面临着4K超高清与高清电视信号同播的问题。基于此,介绍4K超高清和高清电视同播系统,分析信号下变换技术的难点,提出相应的解决方案,并对下变换器进行实测,为电视台应用下变换技术提供参考。

At present, China’s ultra-high-definition television technology is developing rapidly, and many domestic television stations are vigorously promoting the construction of 4K ultra-high-definition production and broadcasting system, so they are facing the problem of simultaneous broadcasting of 4K ultra-high-definition and high-definition television signals. Based on this, this paper introduces 4K UHD and HD TV co-broadcast system, analyzes the difficulties of signal down-conversion technology, puts forward corresponding solutions, and conducts actual measurement of down-conversion, providing reference for TV stations to apply downconversion technology.