Source: http://www.google.com/patents/US7796192?ie=ISO-8859-1
Timestamp: 2015-07-03 10:49:29
Document Index: 653576353

Matched Legal Cases: ['art 10', 'art 20', 'art 10', 'art 20', 'art 20', 'art 23', 'art 10', 'art 15', 'art 20', 'art 10', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20', 'art 20']

Patent US7796192 - Image processing system and method, and image display system - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThere is provided an image processing method capable of improving the picture quality. The image processing method comprises: incorporating input frame pictures to be displayed on a display device, on the basis of an input picture signal and an input synchronizing signal which is synchronized with the...http://www.google.com/patents/US7796192?utm_source=gb-gplus-sharePatent US7796192 - Image processing system and method, and image display systemAdvanced Patent SearchPublication numberUS7796192 B2Publication typeGrantApplication numberUS 11/761,903Publication dateSep 14, 2010Filing dateJun 12, 2007Priority dateJun 23, 2000Fee statusPaidAlso published asUS6836293, US7256836, US7787049, US20020015104, US20050083435, US20070230569, US20070236603Publication number11761903, 761903, US 7796192 B2, US 7796192B2, US-B2-7796192, US7796192 B2, US7796192B2InventorsGoh Itoh, Haruhiko OkumuraOriginal AssigneeKabushiki Kaisha ToshibaExport CitationBiBTeX, EndNote, RefManPatent Citations (22), Referenced by (4), Classifications (35), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetImage processing system and method, and image display system
US 7796192 B2Abstract
an output control switching part configured to take the output picture signal and the output synchronizing signal out of the output frame pictures, which have been recorded in the output frame memory, to transmit the signals to the display device,
wherein the picture signal converting part produces the output frame pictures from the input frame pictures on the basis of a moving or still picture indicating signal, which indicates whether the kind of a picture to be displayed on the display device is a moving picture or a still picture, and the output of the motion discriminating part, and
wherein the motion discriminating part incorporates input frame pictures to be displayed, at regular intervals on the basis of the input picture signal and input synchronizing signal, obtains the correlation between two input frame pictures which have been continuously incorporated, and discriminates whether the input frame picture to be displayed is a moving picture or a still picture on the basis of the correlation result,
The picture signal converting part 10 is designed to convert an input picture signal Sv1 and an input synchronizing signal Ss1, which are fed from the side of an image source (e.g., a personal computer, a digital versatile disk (DVD), an NTSC signal source or an HDTV signal source) on the basis of a display system control signal from the motion discriminating part 20 and a clock signal from the clock generating circuit 30, into an output picture signal Sv2 and an output synchronizing signal Ss2, respectively, to transmit the converted signals to the display device 50. Furthermore, the input picture signal Sv1 and the input synchronizing signal Ss1, and the output picture signal Sv2 and the output synchronizing signal Ss2 are not always the same as will be described later. The input picture signal Sv1 and the input synchronizing signal Ss1, have a signal type determined by the image source side, and the output picture signal Sv2 and the output synchronizing signal Ss2 have a signal type determined by the display device 50. For the converting processing, these signals are latched by a clock signal CLK which is outputted from the clock generating circuit 30. Furthermore, the clock signal CLK for latching the above described picture signal and so forth may be inputted to the picture signal converting part 10 from the outside. In this case, it is not required to provide the clock generating circuit 30.
FIG. 2 shows the construction of an embodiment of the motion discriminating part 20. In this embodiment, the motion discriminating part 20 comprises a switch 21, first through n-th n(n≧2) frame memories 22 1, . . . , 22 n for storing frame pictures, and a differential signal detecting part 23. On the basis of the input picture signal Sv1 and the input synchronizing signal Ss1 which are fed from the image source, frame pictures are incorporated at regular intervals by means of the switch 21 to be sequentially written in the frame memories 22 1, . . . , 22 n in time series. The regular intervals means, e.g., intervals of 1/60 sec. Therefore, the frame numbers of the frame pictures stored in the frame memories 22 1, . . . , 22 n are different in accordance with the frame frequency of the input picture which is fed from the image source to be inputted to the image signal converting part 10. For example, when the frame frequency of the input picture is 60 Hz, the first frame picture is recorded in the first frame memory 22 1, the second frame picture is recorded in the second frame memory 22 2, and the n-th (n≧2) frame picture is recorded in the n-th frame memory 22 n. Then, the (n+1)-th frame picture is recorded in the first frame memory 22 1. Therefore, the k-th (k≧1) frame picture is recorded in the r-th frame memory 22 r if a reminder r is not zero assuming the reminder is r when k is divided by n. Furthermore, when the reminder r is zero, the k-th frame picture is recorded in the n-th frame memory 22 n. When the frame frequency of the input picture is 240 Hz, the frame pictures are recorded in the frame memories 22 1, . . . , 22 n at intervals of four frame pictures (at intervals of 1/60 sec). When the frame frequency of the input image is 480 Hz, the frame pictures are recorded in the frame memories 22 1, . . . , 22 n at intervals of eight frame pictures (at intervals of 1/60 sec).
If the processing time required to prepare an interpolated picture in the image converting part 15 is the same as the frame picture incorporating time interval (e.g., 1/60 sec) in the motion discriminating part 20, the number m of the input frame memories of the picture signal converting part 10 shown in FIG. 3 must be 3 (=60/60+2) when the synchronizing signal Ss1 has 60 Hz, 6(=240/60+2) when the synchronizing signal Ss1 has 240 Hz, and 10 (=480/60+2) when the synchronizing signal Ss1 has 480 Hz. The reason why “+2” is added is that the total two frame memories including a frame memory for preparing an interpolated picture and a frame memory for inputting a new picture while preparing the interpolated pictures are required.
After the production of the interpolated picture c is completed and the recording of the input frame picture D is completed, an interpolated picture d, which is shifted in the direction of the time axis, is produced from the input frame pictures C and D, and is recorded in the second output frame memory 17 2 as an output frame picture d (see FIGS. 4 and 5). Furthermore, while the interpolated picture d is produced, the input frame picture E is recorded in the second frame memory 13 2 (see FIG. 5). In addition, while the interpolated picture d is recorded, the output frame picture c is outputted as an output picture signal Sv2 via the output control switch 18.
i) Referring to FIG. 19, a case where the motion discriminating part 20 determines that the display pictures are moving pictures will be described below. 1) When the refresh rate of the input frame picture is equal to the refresh rate of the output frame picture, e.g., when the refresh rate of the input frame picture is 240 Hz and the refresh rate of the output frame picture is 240 Hz, input frame pictures A, B, C, D and E shown in FIG. 19( a) are directly outputted as output frame pictures a, b, c, d and e as shown in FIG. 19( b).
ii) Referring to FIG. 20, a case where the motion discriminating part 20 determines that the display pictures are still pictures will be described below. 1) When the refresh rate of the input frame picture is equal to the refresh rate of the output frame picture, e.g., when the refresh rate of the input frame picture is 240 Hz and the refresh rate of the output frame picture is 240 Hz, input frame pictures A, B, C, D and E shown in FIG. 20( a) are directly outputted as output frame pictures a, b, c, d and e as shown in FIG. 20( b).
i) Referring to FIG. 21, a case where the motion discriminating part 20 determines that the display pictures are moving pictures will be described below. 1) When the refresh rate of the input frame picture is equal to the refresh rate of the output frame picture, e.g., when the refresh rate of the input frame picture is 240 Hz and the refresh rate of the output frame picture is 240 Hz, input frame pictures A, B, C, D and E shown in FIG. 21( a) are directly outputted as output frame pictures a, b, c, d and e as shown in FIG. 21( b).
ii) Referring to FIG. 22, a case where the motion discriminating part 20 determines that the display pictures are still pictures will be described below. 1) When the refresh rate of the input frame picture is equal to the refresh rate of the output frame picture, e.g., when the refresh rate of the input frame picture is 240 Hz and the refresh rate of the output frame picture is 240 Hz, input frame pictures A, B, C, D and E shown in FIG. 22( a) are directly outputted as output frame pictures a, b, c, d and e as shown in FIG. 22( b).
For example, if the display device 50 is an impulse type display device, when the moving/still picture indicating signal indicates a still picture and when the motion discriminating part 20 determines that the display picture is a rapid moving picture (e.g., when the whole screen is switched), an output picture is selected as shown in FIG. 8( d). When the motion discriminating part 20 determines that the display picture is a slow moving picture (e.g., when the screen is scrolled), an output picture is selected as shown in FIG. 8( b), and when the motion discriminating part 20 determines that the display picture is a still picture, an output picture is selected as shown in FIG. 8( d). On the other hand, when the moving/still picture indicating signal indicates a moving picture and when display picture is a rapid moving picture (e.g., when a moving object which moves rapidly exists), an output picture is selected as shown in FIG. 8( b), and when the motion discriminating part 20 determines that the display picture is a slow moving picture (e.g., when a moving object which moves slowly exists), an output picture is selected as shown in FIG. 8( c). If the motion discriminating part 20 determines that the display picture is a still picture, information thereon is ignored, and an output picture is selected as shown in FIG. 8( c). The reason why the output picture shown in FIG. 8( c) is selected is that no interpolated picture can be prepared. A system for determining the moving speed of the moving picture in the motion discriminating part 20 may be the same as that in the first embodiment. Alternatively, when the difference between information in an input frame memory, which has been most newly inputted, and those in other input frame memories is large, it may be determined that motion is rapid, and when the difference between information in the input frame memory, which has been most newly inputted, and the oldest input frame memory is small, it may be determined that motion is slow.
c=3/(20�(3/60))=3cpd (1)
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5249037Jun 1, 1989Sep 28, 1993Hitachi, Ltd.Image signal correction circuit and image signal processor using the circuitUS5428397May 5, 1994Jun 27, 1995Goldstar Co., Ltd.Video format conversion apparatus for converting interlaced video format into progressive video format using motion-compensationUS5859660 *Feb 29, 1996Jan 12, 1999Perkins; Michael G.Non-seamless splicing of audio-video transport streamsUS5936676Aug 25, 1997Aug 10, 1999Miranda Technologies Inc.Apparatus and method for line interpolating an interlaced video signalUS6222589Aug 8, 1996Apr 24, 2001Yves C. FaroudjaDisplaying video on high-resolution computer-type monitors substantially without motion discontinuitiesUS6483545Jul 21, 1999Nov 19, 2002Sony CorporationInformation signal processing apparatus, picture information converting apparatus, and picture displaying apparatusUS6836293Jun 21, 2001Dec 28, 2004Kabushiki Kaisha ToshibaImage processing system and method, and image display systemUS7256836 *Oct 22, 2004Aug 14, 2007Kabushiki Kaisha ToshibaImage processing system and method, and image display systemJP2000010535A Title not availableJP2000047630A Title not availableJP2000165821A Title not availableJPH0918740A Title not availableJPH1155631A Title not availableJPH04302289A Title not availableJPH05183877A Title not availableJPH05236429A Title not availableJPH08248392A Title not availableJPH09325715A Title not availableJPH11109921A Title not availableJPH11220733A Title not availableJPH11297260A Title not availableKR19990068201A Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS8330857 *Apr 22, 2010Dec 11, 2012Canon Kabushiki KaishaDisplay apparatus and control method thereofUS8547479Oct 3, 2012Oct 1, 2013Canon Kabushiki KaishaDisplay apparatus and control method thereofUS20100271545 *Apr 22, 2010Oct 28, 2010Canon Kabushiki KaishaDisplay apparatus and control method thereofUS20120133747 *Nov 10, 2011May 31, 2012Sony CorporationImage processing apparatus, display apparatus, image processing method and image processing program* Cited by examinerClassifications U.S. Classification348/452, 348/451, 348/448, 348/443International ClassificationG09G5/00, G09G3/36, G09G1/16, G06T1/00, G03B21/00, G09G3/20, G09G5/391, G09G3/22, G09G3/30, H04N5/66, G09G5/36, H04N11/20, H04N7/01Cooperative ClassificationG09G3/30, G09G2340/0435, G09G3/3651, H04N7/0132, G09G3/20, H04N7/0137, H04N7/01, G09G1/167, G09G2320/0257, G09G5/005, G09G3/22, G09G2320/103, G09G5/006, G09G2320/0261European ClassificationH04N7/01, G09G5/00T4, G09G5/00T2, G09G3/20Legal EventsDateCodeEventDescriptionSep 6, 2011ASAssignmentOwner name: TOSHIBA MOBILE DISPLAY CO., LTD., JAPANEffective date: 20110824Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KABUSHIKI KAISHA TOSHIBA;REEL/FRAME:026859/0288Jun 8, 2012ASAssignmentFree format text: CHANGE OF NAME;ASSIGNOR:TOSHIBA MOBILE DISPLAY CO., LTD.;REEL/FRAME:028339/0316Owner name: JAPAN DISPLAY CENTRAL INC., JAPANEffective date: 20120330Mar 6, 2014FPAYFee paymentYear of fee payment: 4RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services