Apparatus and method for deinterlace video signal

Abstract

The invention provides a method for eliminating the interlacing of image signal, which is characterized in comprising the following steps: a border part between the line image data in predefined column image field and the image data of scheduled line is found, and the interpolation data in the image field is obtained according to the border part; the movement value is extracted by utilizing the image data in current image field and the delay image data of two image fields; the film image is extracted according to the extracted movement value; the extracted movement and an image field delay movement value are compared, and a rapid-movement image is detected; the interpolation data and the image data generated in previous image field can be obtained through the interpolation according to the movement value, detecting rapid-movement image and film image. The image signal interlacing eliminating method has the advantages that: the interlaced scanning can be prevented from being transformed into a ladder shape of oblique line straight flange when the image is in sequential scanning, so the border part can be connected in a smooth straight line shape; For the part in rapid movement, the horizontal ripple residual image can be avoided. Furthermore, the image quality can be improved by restoring the image in film mode close to the original image.

Description

field of invention [0001] The present invention relates to a method for deinterlacing a video signal, and more particularly to such a device and method for deinterlacing a video signal, wherein an interlaced image composed of fields (field) is converted into an image of the same number When a progressive scan image is composed of frames, the picture quality of the border part is improved by eliminating the step phenomenon (step phenomenon) occurring in the border part. In addition, a small number of field storage devices can be used to prevent horizontal moiré residual images involving partial images with fast motion, and interlaced images can be converted to progressive images while maintaining The picture quality of the original image. Background technique [0002] Usually, the display of an interlaced image is realized by alternately displaying the odd field corresponding to the odd line group of the screen and the even field corresponding to the even line group of the s...

AI Technical Summary

Problems solved by technology

However, since it is similar to overlapping two pictures with somewhat different timings from each other, the inter-field interpolation method has disadvantages in that flickering may occur in an overall moving picture, and in a picture with a local moving object, A horizontal moiré afterimage may appear towards the direction of motion of the object

In this motion-adaptive de-interlacing approach, the complexity and picture quality improvements vary greatly depending on the number of field storage devices used to detect motion

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