US 2003/0112369 A1Published application

Apparatus and method for deinterlace of video signal

OwnerDae-Woon Yoo, Du-Sik Yanginventors

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Abstract

There is provided a method for deinterlacing image signals, which is capable of improving a definition of boundary portions when converting an interlaced scanning image into a progressive scanning image, and recovering a fast-motion image or a film image to be close to an original image. The method of the present invention includes the steps of: finding boundary portions between image data of line of a predetermined current field and image data of a previous line, and obtaining to-be-interpolated data within field according to the boundary portions; extracting a motion value using the image data of the current field and two-field delayed image data; extracting a film image based on the extracted motion value; comparing the extracted motion value with a one-field delayed motion value and detecting a fast motion image; and generating image data by interpolating lines of the obtained to-be-interpolated data and the previous field data according to the motion value, the detected fast motion image and the detected film image.

Claims24

Dependent claims

A method for deinterlacing image signals, the method comprising the steps of:

(a) extracting motion values with respect to to-be-interpolated pixels using current field data and two-field delayed data;
(b) dividing one intra-field pixels into partial images based on block unit, and determining whether or not corresponding partial image has a motion using the extracted motion values;
(c) determining whether or not the corresponding partial image has a fast motion using the determination result of the step (b) and the determination result of a one-field delayed data;
(d) cumulatively counting the determination result of the step (b) for all fields and determining whether or not the current field is a motion field;
(e) determining whether or not an inputted image is a film image using data sequentially storing the determination result of the step (b) for several fields;
(f) if the inputted image is the film image, synthesizing sequential two fields contained in the same frame to make a progressive scanning image;
(g) if the inputted image is not the film image, determining that there is no motion according to the extracted motion values of the respective pixels, and if the inputted image is not a pixel contained in the partial image having the fast motion, performing an intra-field interpolation to obtain an interpolation pixel value;
and
(h) finding a directionality of boundary of surroundings of to-be-interpolated pixels with respect to the other pixels using pixels of current and just previous lines of a predetermined field, and calculating to-be-interpolated pixel value according to the directionality.

6 more elements

A method for deinterlacing image signals, the method comprising the steps of:

(a) finding boundary portions between image data of line of a predetermined current field and image data of a previous line, and obtaining to-be-interpolated data within field according to the boundary portions;
(b) extracting a motion value using the image data of the current field and two-field delayed image data;
(c) extracting a film image based on the extracted motion value;
(d) comparing the extracted motion value with a one-field delayed motion value and detecting a fast motion image;
and
(e) generating image data by interpolating lines of the obtained to-be-interpolated data and the previous field data according to the motion value, the detected fast motion image and the detected film image.

3 more elements

An apparatus for deinterlacing image signals, the apparatus comprising:

(a) a boundary processing means for finding boundary portions between image data of line of a predetermined current field and image data of a previous line, and obtaining to-be-interpolated data within field according to the boundary portions;
(b) a motion detection means for detecting a motion value using the image data of the current field and two-field delayed image data;
(c) a film image processing means for detecting a film image based on the extracted motion value and determining a to-be-interpolated field data according to the detected film image;
(d) a fast image processing means for comparing the detected motion value with a one-field delayed motion value and detecting a fast motion image;
and
(e) a synthesis means for generating image data by selectively interpolating lines of the obtained to-be-interpolated data and the previous field data according to the detected motion value, the detected fast motion image and the detected film image.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/315,999Filed 11 Dec 2002
Priority: KR 2001-7927714 Dec 2001
Published: 19 Jun 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

H04N 7/012
Involving conversion of the spatial resolution of the incoming video signal: conversion between an interlaced and a progressive signal
H04N 7/0112
Conversion of standards , e.g. involving analogue television standards or digital television standards processed at pixel level: one of the…
H04N 7/0137
Involving interpolation processes: dependent on presence/absence of motion, e.g. of motion zones
H04N
Pictorial communication