Source: http://www.google.com/patents/US20040233326?dq=5893120
Timestamp: 2017-12-17 02:43:50
Document Index: 163866768

Matched Legal Cases: ['art 110', 'art 130', 'art 140', 'art 180', 'art 140', 'art 180', 'art 200', 'art 110', 'art 200', 'art 160', 'art 200', 'art 130', 'art 200', 'art 200']

Patent US20040233326 - Apparatus and method for deinterlace video signal - Google Patents
There is provided an image signal deinterlacing apparatus for converting an interlaced scanning image into a progressive scanning image. The deinterlacing apparatus includes: an intra-field pixel processing unit for detecting a face area and a to-be-interpolated data within a field by using pixels of...http://www.google.com/patents/US20040233326?utm_source=gb-gplus-sharePatent US20040233326 - Apparatus and method for deinterlace video signal
Publication number US20040233326 A1
Application number US 10/778,533
Also published as CN1574951A, US7170562
Publication number 10778533, 778533, US 2004/0233326 A1, US 2004/233326 A1, US 20040233326 A1, US 20040233326A1, US 2004233326 A1, US 2004233326A1, US-A1-20040233326, US-A1-2004233326, US2004/0233326A1, US2004/233326A1, US20040233326 A1, US20040233326A1, US2004233326 A1, US2004233326A1
Inventors Dae-Woon Yoo, Du-Sik Yang
Original Assignee Dae-Woon Yoo, Du-Sik Yang
Apparatus and method for deinterlace video signal
US 20040233326 A1
Conventional techniques similar to the first technique are disclosed in U.S. Pat. No. 5,929,918 and U.S. Pat. No. 6,262,773. In the U.S. Pat. No. 5,929,918, when the intra-field interpolation is performed since the motion is detected, the interpolation is performed using one line memory device and along three interpolation angles, i.e., a vertical direction, +45° and −45°. In U.S. Pat. No. 6,262,773, although the interpolation is performed along the boundaries of 11 directions, three line memory devices are used. According to the two patents, in case a large number of line memory devices are used, a circuit design is complicated, but the picture quality is improved since the interpolation can be performed along the boundaries of many directions. In case a small number of line memory devices are used, the hardware is simple but the picture quality is degraded since the direction that can be interpolated is reduced.
[0046]FIG. 1 is a block diagram showing an overall construction of an apparatus for deinterlacing video signals in accordance with the present invention;
[0047]FIG. 2 is a detailed block diagram of the field processing part shown in FIG. 1;
[0048]FIG. 3 is a detailed block diagram of the intra-field pixel processing part shown in FIG. 1;
[0049]FIG. 4 is a detailed block diagram of the intra-field edge processing unit shown in FIG. 3;
[0050]FIG. 5 is a detailed block diagram of the directionality selecting unit shown in FIG. 4; FIG. 6 is a detailed block diagram of the motion value generating part shown in FIG. 1;
[0051]FIG. 7 is a detailed block diagram of the film image processing part shown in FIG. 1;
[0052]FIG. 8 is a detailed block diagram of the bad edit detecting unit shown in FIG. 7;
[0053]FIG. 9 is a detailed block diagram of the caption area detecting unit shown in FIG. 7;
[0054]FIGS. 10A to 10F illustrate a concept of the face area in the face area detecting unit of FIG. 3;
[0055]FIGS. 11A and 11B illustrate a concept of the film image in the film image processing part of FIG. 7;
[0056]FIGS. 12A and 12B illustrate a concept of the bad edit image in the bad edit detecting unit of FIG. 8; and
[0057]FIG. 13 illustrates a concept of the caption region in the caption area detecting unit of FIG. 9.
[0059]FIG. 1 is a block diagram showing an overall construction of an apparatus for deinterlacing video signals in accordance with the present invention.
[0072]FIG. 2 is a detailed block diagram of the field processing part 110 shown in FIG. 1.
[0074]FIG. 3 is a detailed block diagram of the intra-field pixel processing part 130 shown in FIG. 1.
[0076]FIG. 4 is a detailed block diagram of the intra-field edge processing unit 131 shown in FIG. 3.
[0078]FIG. 5 is a detailed block diagram of the directionality selecting unit 136 shown in FIG. 4.
[0080]FIG. 6 is a detailed block diagram of the motion value generating part 140 shown in FIG. 1.
[0082]FIG. 7 is a detailed block diagram of the film image processing part 180 shown in FIG. 1.
[0084]FIG. 8 is a detailed block diagram of the bad edit detecting unit 184 shown in FIG. 7.
[0086]FIG. 9 is a detailed block diagram of the caption area detecting unit 186 shown in FIG. 7.
[0096]FIGS. 10A to 10F illustrate a concept of the face area in the face area detecting unit 132. As shown, if value differences of the pixels represented by arrows among the input line image data C1 to C4 are smaller than a predefined value, it is determined as the face area.
Using the motion value N-MAX of the intra-field inputted from the motion value generating part 140, the first film detecting unit 181 of the film image processing part 180 shown in FIG. 7 detects whether or not the inputted original image is the 3:2 film image by using a correlation filter having five taps, and outputs the film image recognition signal F-EN1 indicating the 3:2 film image and the inter-field selecting signal FPFS1. As shown in a film interlaced signal of FIG. 11A, T1 and B1 are fields generated in the same frame. T2, B2 and T2—1 are fields that are generated in the same frame, and T4, B4 and T4—1 are fields that are generated in the same frame. By repeating this manner, an image is inputted. In this case, if the current field is T2—1 or T4—1, it is a field that is generated in the same frame as T2 and B2, or T4 and B4. Therefore, it becomes a field having no motion.
As shown in a film interlaced signal of FIG. 11B, T1 and B1 are fields that are generated in the same frame, and T2 and B2 are fields that are generated in the same frame. T3 and B3 are fields that are generated in the same frame, and T4 and B4 are fields that are generated in the same frame. In this manner, the same frame is inputted repeatedly by two sheets. Therefore, an image of a next field must be interpolated in the first field of two sheets. At this time, the film image recognition signal F-EN2 indicating the 2:2 film image becomes “0”.
[0141]FIG. 12A illustrates a concept of the bad edit image in the 3:2 film image, and FIG. 12B illustrates a concept of the bad edit image in the 2:2 film image. If the film image is processed without detecting portions represented by “bad edit” in FIGS. 12A and 12B, step patterns and horizontal moire patterns may occur in the boundaries. Accordingly, the first and second film bad edit detecting units 184 a and 184 c detect the bad edit only in the film image.
[0143]FIG. 13 illustrates a concept of the caption area in the caption area detecting unit 186 of FIG. 9. The film area and the caption area are separately operated when the caption area is defined in the film area.
Meanwhile, if the film mode signal EN1 is “1” and the caption display mode signal EN5 indicating the still caption or the motion caption in the caption area is “0”, the synthesizing part 200 selects the inter-field data INTER0, which is inputted from the field processing part 110, as the to-be-interpolated data. If the still image signal EN6 is “1”, it means that the field is the still image. Therefore, the synthesizing part 200 selects the inter-field data INTER0 as the to-be-interpolated data and outputs it through the output terminal 220. Except for the two conditions, if the fast image motion signal EN2 of “11” is inputted from the fast image processing part 160, it means that the fast motion exists. Therefore, the synthesizing part 200 selects the intra-field data INTRA0 of the intra-field pixel processing part 130 as the to-be-interpolated data. If the fast image motion signal EN2 is “0” and the motion boundary maintenance signal EN3 is “1”, the boundary portion exists between motion image and the still image. Therefore, the synthesizing part 200 selects the inter-field data INTER0 as the to-be-interpolated data. In order to prevent the misjudgment that the motion exists because noise signal exists in front and rear fields disposed at the same position as the inter-field to-be-interpolated pixel, if the fast image motion signal EN2 is “0” and the inter-field noise signal EN4 is “1”, the inter-field data INTER0 is selected as the to-be-interpolated data. Further, if the fast image motion signal EN2, the motion boundary maintenance signal EN3 and the inter-field noise signal EN4 are “0”, the synthesizing part 200 selects one of the intra-field data INTRA0 and the inter-field data INTER0 according to the maximum motion value M-MAX and outputs it through the output terminal 220. If the maximum motion value M-MAX is less than the predefined value, horizontal moire pattern phenomenon occurs due to a small pixel difference. Therefore, if the absolute value of the difference between the inter-field data INTER0 and the intra-field data INTRA0 is less than the predefined value, the intra-field data INTRA0 is selected and outputted thorough the output terminal 220.
CN101959048A * Jul 7, 2010 Jan 26, 2011 索尼公司 Image processing apparatus and image processing method
EP2026562A2 * Jun 18, 2008 Feb 18, 2009 Samsung Electronics Co., Ltd. Video display apparatus and noise removal method thereof
EP2026562A3 * Jun 18, 2008 Jul 28, 2010 Samsung Electronics Co., Ltd. Video display apparatus and noise removal method thereof
U.S. Classification 348/452, 348/448, 348/E07.015
International Classification G09G5/391, G09G5/36, H04N7/01, G09G5/00