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本文是通过分析与计算机模拟,介绍一种用于向HDTV兼容过渡的系统制式的二维信号滤波设计。用1250行50场隔行的信源,经预滤波降扫描变换为625行(?)50场隔行的信号,用现有广播设备进行广播发射。在收端经后滤波升扫变换处理,由高清晰度显示,用现有625/50/2:1接收机也可兼容接收。
This article presents a system-type two-dimensional signal filtering design for transitioning to HDTV compatibility through analysis and computer simulation. With 50 lines of 1250 lines of interlaced sources, the pre-filtered down-scan transforms into 625 lines (?) 50 interlaced signals that are broadcast using existing broadcast equipment. In the end by the post-filtering upscan transform processing, high-definition display, with the existing 625/50/2: 1 receiver is also compatible to receive.