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一、VM电路及其技术进步 VM电路是动态电子束扫描速度调制电路(Dynamic Scar Velocity Modulator)的简称,是一种新型的图像轮廓校正电路。与传统的图像轮廓校正电路相比较,其有明显的技术进步。传统的图像轮廓校正电路是对亮度(图像)信号Y进行二次微分,取出图像轮廓校正信号M,再经放大、反相并与原图像(亮度)信号Y相加来达到对图像轮
First, the VM circuit and its technological advances VM circuit is short for dynamic electron beam scanning speed modulation (Dynamic Scar Velocity Modulator), is a new type of image contour correction circuit. Compared with the traditional image contour correction circuit, it has obvious technical progress. The conventional image contour correction circuit carries out the second derivative of the luminance (image) signal Y, takes out the image contour correction signal M, and then enlarges, inverts and adds with the original image (luminance) signal Y to reach the image wheel