场梳状滤波亮色分离的二维频谱分析

2-dimensional spectrum analysis for luminance and chrominance separation by field comb filtering

运用多维数字信号处理理论，分析了ＰＡＬ信号亮度和色度频谱的二维交错结构。给出了用于二维亮色分离的３１２行延迟和３１３行延迟场梳状滤波器的原理框图，推导了其二维频率响应公式。指出了场梳状滤波比行、帧梳状滤波的优越之处。

Applying the theory of multi dimensional digital signal processing, this paper analyses the 2-dimensional interleaving structure of luminance and chrominance spectrum for the PAL signal. The block diagramsof the field comb filter with 312 and 313 line delay are given for 2-dimensional luminance and chrominance separation, their 2-dimensional frequency response formulas are derived. The advantage of field comb filter over lineand frame comb filters is pointed out in this paper.