| At present, part of the central television channel, BeiJing TV, Jiangsu TV, Hu Nan TV station part has achieved digital high-definition television channels broadcast, marking the Chinese television has ushered in the era of digital high-definition broadcast.HDTV for television than for 16:9 screen picture type; And standard definition TV screen type amplitude ratio of 4:3, but in China’s television industry development of decades, we have accumulated a large quantities of precious 4:3 image than the standard definition of the material, even if all channels using high-definition 16:9, we will use this part of 4:3 standard definition of the material, the type and the ratio of 16:9 than broadcast video material mixing, two situations will appear either at the television receiving screen video images of a horizontal black bar cropping up and down, either on the TV to receive the screen video image around a vertical black strip cropping, so that the audience watching TV brings the feeling of displeasure, this is the current domestic each television station in standard definition video broadcast during the transition to a high-definition video broadcast, broadcast and the audience feel confused, is also a problem urgently to be solved in TV broadcast.So how do you in a broadcast system namely broadcast hd broadcast standard definition, how to deal with two kinds of type of mixed seeding than 4:3 and 16:9, these problems if not do any processing of broadcast is bound to bring the audience visual feeling, this is not conducive to the development of the whole TV video. This article is mainly aimed at the above problems demand analysis put forward the ideas to solve the problem, the design and implement a set of compatible starts with information broadcast system, not only to meet the people’s growing cultural needs, but also more beautiful, more perfect interpretation of television art effect, also powerfully promote the development of TV video. |
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