JP2010124309A - Image display and image adjusting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display and image adjusting method for optimizing image quality of an image to be displayed. <P>SOLUTION: Image processing engines (A-ch)16, (B-ch)17 are processors for performing digital processing of image signals, are each configured independently, and perform various kinds of processes independently. Accordingly, the image signals are independently adjusted in each of the image processing engines, combined thereafter in an overlay device 20 and output as an image signal corresponding to one image. Memories (A-ch)18, (B-ch)19 are connected to the image processing engines (A-ch)16, (B-ch)17, respectively. During an adjustment mode, independent images processed by the two image processing engines are simultaneously displayed on an FPD (flat panel display) 22. Here, since not still images but moving images are displayed, adjustments such as I/P conversion, three-dimensional YC separation processing, DNR processing, super resolution processing and the like can be easily performed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image adjustment method capable of appropriately adjusting image quality and an image display apparatus having the function.

  In an image display device such as a liquid crystal display, an operation for optimizing an image is performed by a user performing fine adjustment of image quality in a displayed image, and various techniques for facilitating the operation are reported. ing. The contents of the fine adjustment include setting of various parameters in screen brightness, contrast, color tone, noise reduction processing, and the like.

  This fine adjustment is performed by the user confirming the adjusted image with the naked eye, but in reality, the difference is often subtle. Therefore, for example, it is effective to display an image before adjustment and an image after adjustment on the same screen, and allow the user to perform this operation in a form that makes it easy for the user to compare them. For this reason, Patent Document 1 describes an image display device that creates images corresponding to a plurality of values of parameters to be adjusted, and simultaneously displays the plurality of images and a default image on the same screen. Yes.

  Further, in Patent Document 2, when an image with the same adjustment is displayed on the same screen, a part of an image is taken out and the pre-adjustment image and the post-adjustment image are displayed side by side. A technique for arranging and displaying a part of an image and another part of the adjusted image so as to form one image is described.

  Patent Document 3 describes a technique for simultaneously displaying a pre-adjustment image and a post-adjustment image in a television receiver, and simultaneously displaying recommended adjustment parameter values according to electronic program information. .

  Using such a technique, the user can easily adjust the image quality in the image.

JP 2002-218350 A JP 2005-228295 A JP 2006-13618 A

  In any of the above techniques, the images to be compared are still images. However, for example, moving image data is used in I / P (interlace / progressive) conversion, three-dimensional YC separation processing, NR (noise reduction) processing, and the like. Therefore, in this adjustment, it is necessary to compare the moving images, and even when still images are compared, it is impossible to make these optimal adjustments. Further, as described above, even in this case, the difference is subtle in human sense, and it is necessary to compare the images before and after adjustment, but this is not possible with the above technique. .

  That is, in the prior art, it has been difficult to optimize the image quality of the displayed image.

  The present invention has been made in view of such problems, and an object thereof is to provide an invention that solves the above problems.

In order to solve the above problems, the present invention has the following configurations.
An image display device according to the present invention is an image display device that processes an input image signal to display a moving image, and each of the image signals is input and a plurality of image processing engines that output the moving image; A display unit configured to simultaneously display a plurality of moving images output from the plurality of image processing engines, and at least one of the plurality of image processing engines includes a moving image adjustment function. To do.
The image display apparatus of the present invention includes an overlay unit that displays an image based on image signals output from the plurality of image processing engines so as to be superimposed on the display unit, and each of the plurality of image processing engines is input to the display unit. An image signal of an image partially including an image corresponding to the received image signal is output.
The image display apparatus according to the present invention is configured such that, in an image corresponding to an image signal output from the plurality of image processing engines, a position and a size occupied by the image corresponding to the input image signal can be set by a user. It is characterized by that.
The image display apparatus according to the present invention includes a plurality of memories connected to the plurality of image processing engines and storing the image signals.
The image display device of the present invention is characterized in that images corresponding to different times in the moving images processed by the plurality of image processing engines are simultaneously displayed on the display unit.
In the image display device of the present invention, the adjustment function performs three-dimensional image processing with one axis as a time axis.
In the image display device of the present invention, the adjustment function includes I / P (interlace / progressive) conversion, three-dimensional YC separation processing, DNR (digital noise reduction) processing, MNR (mosquito noise reduction) processing, and BNR (block noise). It is characterized in that at least one of a reduction process and a super-resolution process is adjusted.
In the image display device of the present invention, the adjustment function adjusts at least one of brightness (brightness), contrast, chromaticity, hue, RGB balance, color temperature, and γ curve in the moving image. To do.
In the image display device of the present invention, the image signal is input from a video reproduction device.
The image display device of the present invention is an image for adjustment that displays the value of a parameter in the adjustment function when moving images processed by the plurality of image processing engines are simultaneously displayed on the display unit in the display unit. Are superimposed and displayed.
The image display device according to the present invention is characterized in that a menu screen of processing performed in the adjustment function is superimposed on the display unit.
The image adjustment method of the present invention is an image adjustment method for adjusting an input image signal in order to display a moving image, and the same image signal is input to and output from a plurality of independent image processing engines. In the display step of simultaneously displaying a plurality of images on the same screen and in at least one of the plurality of image processing engines, the user performs image adjustment processing, and the plurality of images including the images after the adjustment processing are included. And an adjustment step of simultaneously redisplaying images on the same screen.
In the image adjustment method of the present invention, in the display step and the adjustment step, the plurality of image processing engines each output an image signal of an image partially including an image corresponding to the input image signal, An image based on an image signal is superimposed and displayed.
The image adjustment method of the present invention is characterized in that, in an image corresponding to an image signal output from the plurality of image processing engines, the position and size occupied by the image corresponding to the input image signal are set by a user. And
The image adjustment method of the present invention is characterized in that the setting by the user is performed using an operation key of a remote control transmitter.
In the image adjustment method of the present invention, the image processing engine stores the input image signal and outputs an image based on the stored image signal.
The image adjustment method of the present invention is characterized in that in the display step and the adjustment step, images corresponding to different times in the moving images processed by the plurality of image processing engines are simultaneously displayed.
The image adjustment method of the present invention is characterized in that, in the adjustment process, three-dimensional image processing is performed with one axis as a time axis.
The image adjustment method of the present invention includes an I / P (interlace / progressive) conversion, a three-dimensional YC separation process, a DNR (digital noise reduction) process, an MNR (mosquito noise reduction) process, and a BNR (block noise). It is characterized in that at least one of a reduction process and a super-resolution process is adjusted.
The image adjustment method of the present invention is characterized in that in the adjustment process, at least one of brightness (brightness), contrast, chromaticity, hue, RGB balance, color temperature, and γ curve in the moving image is adjusted. To do.
The image adjustment method of the present invention is characterized in that, in the adjustment step, an adjustment image for displaying a parameter value in the adjustment process is displayed together with the plurality of images.
The image adjustment method of the present invention is characterized in that, in the adjustment step, a menu screen of processing performed in the adjustment function is displayed in a superimposed manner.
The image adjustment method of the present invention is characterized in that, in the adjustment step, the plurality of images are displayed adjacent to each other without a gap so as to form one image based on the input image signal.
The image adjustment method of the present invention is characterized in that, in the adjustment step, a partially enlarged image in at least one of the plurality of images is displayed.
The image adjustment method of the present invention is characterized in that in the adjustment step, at least one of the plurality of images is displayed as a still image.

  Since the present invention is configured as described above, the image quality of the displayed image can be optimized.

  Hereinafter, an image display apparatus which is the best mode for carrying out the present invention will be described. In the image display device 10, various image signals are used as input signals. Therefore, an image signal A / D converter 11 that converts an analog image signal into a digital signal, an HDMI (High Definition Multimedia Interface) signal or an HDMI / DVI signal receiver 12 for inputting a DVI (Digital Visual Interface) signal, video A video signal decoder 13 for converting a signal into a digital signal and a tuner 14 such as a television receiver are provided as an input interface. The signals output from these are input to the input multiplexer 15, and the same image signal is output in two systems. These two systems are an image processing engine (A-ch) 16 and an image processing engine (B-ch) 17, respectively. That is, the image display apparatus 10 includes two independent image processing engines. A memory (A-ch) 18 and a memory (B-ch) 19 are connected to an image processing engine (A-ch) 16 and an image processing engine (B-ch) 17, respectively, and store image signals in these. can do.

  An image processing engine (A-ch) 16 and an image processing engine (B-ch) 17 are processors that perform digital processing of an image signal, and each has an independent configuration and performs various processes independently. Therefore, this image signal is independently adjusted in each image processing engine, and then synthesized by the overlay apparatus (overlay unit) 20 and output as an image signal corresponding to one image. Here, another image such as a menu screen is also created by an OSD (On Screen Display) drawing block 21, and an image signal that is an image superimposed on this image is output.

  An image based on this image signal is displayed on an FPD (Flat Panel Display) 22. Therefore, the image signal is adjusted by the output formatter 23 and then input to the panel driver 24. As a result, the FPD 22 operates and is output as an image. In addition to the above-described components, the image display device 10 includes a control unit 25 that controls all these components and a memory (for control) 26 that stores information necessary for the control. . In FIG. 1, the connection between the control unit 25 and the above components is omitted. The control unit 25 is also provided with a remote control reception unit 27 that receives a signal from a remote control transmitter owned by the user and inputs the signal to the control unit 25.

  Here, an image in the image signal output by the image processing engine (A-ch) 16 and the image processing engine (B-ch) 17 will be described. It is assumed that the pixels of the image finally displayed by the FPD 22 are 1920 × 1080. As shown in FIG. 2A, the image output by the image processing engine (A-ch) 16 displays the actual image 201 only in the left half of the image of this size, and the right half is the blank area 202. It is an image. As shown in FIG. 2B, the image output by the image processing engine (B-ch) 17, on the contrary, the actual image 203 is displayed only on the right half and the left half is the blank area 204. It has become. Therefore, the image synthesized by the overlay device 20 is in a form in which the image 201 is displayed on the left side and the image 203 is displayed on the right side, as shown in FIG. That is, each image processing engine outputs an image signal of an image partially including an image corresponding to the input image signal, and the overlay device 20 outputs an image based on the image signal output by each image processing engine to the FPD 22. Use to overlay and display.

  Here, each of the image processing engine (A-ch) 16 and the image processing engine (B-ch) 17 has a moving image adjustment function independently. The adjustment function performed here is adjustment of brightness (brightness), contrast, chromaticity, hue, RGB balance, color temperature, and γ curve as an image quality adjustment function generally known for color moving images, P (interlace / progressive) conversion, three-dimensional YC separation processing, DNR (digital noise reduction) processing, MNR (mosquito noise reduction) processing, BNR (block noise reduction) processing, super-resolution processing (when an image is enlarged) There is an adjustment of the filter in the technique that makes it appear to improve the resolution in a pseudo manner by reducing noise. Also, functions such as image cropping, enlargement, and reduction can be performed independently of each other.

  Here, the adjustment of brightness (brightness), contrast, chromaticity, hue, RGB balance, color temperature, γ curve, etc., is the same whether the output image is a still image or a moving image. Done.

  In contrast, for example, I / P conversion, three-dimensional YC separation processing, DNR processing, super-resolution processing, and the like are processing used in moving images. That is, these processes are not performed as two-dimensional image information, but as three-dimensional image processing using one axis as a time axis.

  Here, if the I / P conversion process is not properly performed, an afterimage or combing (comb-like pattern) may appear. If noise reduction processing such as DNR processing, MNR processing, and BNR processing is not performed properly, resolution may deteriorate and a blurred image may occur. If the three-dimensional YC separation process is not properly performed, an image with a large afterimage feeling is obtained. If the super-resolution processing is not properly performed, the enlarged image is particularly deteriorated. Therefore, it is necessary to optimize these processes.

  Here, the operation of the image display device 10 will be described when the image in the image signal output from the input multiplexer 15 is the image 31 shown in FIG. The image display device 10 operates in two modes: an adjustment mode for adjusting a moving image adjustment parameter and a normal mode in which a moving image is displayed on a full screen.

  In the adjustment mode, independent images processed by the two image processing engines are simultaneously displayed on the FPD 22. Below, the operation | movement at this time is demonstrated.

  In FIG. 4A, the image processing engine (A-ch) 16 and the image processing engine (B-ch) 17 reduce the image signal by 50% in the horizontal direction and are finally displayed on the FPD 22. Show. Here, in the adjustment mode, as described above, the image 41 processed by the image processing engine (A-ch) 16 is on the left side, and the image 42 processed by the image processing engine (B-ch) 17 is on the right side. Are displayed side by side. However, in the image processing engine (A-ch) 16, the parameters for the various adjustments are all initial values. On the other hand, in the image processing engine (B-ch) 17, the various adjustment parameters are changed by the user. The image for adjustment at this time is the adjustment image 43 in FIG. 4, and here, the value of each parameter is indicated by a bar, and this value can be freely set by the user using a remote control transmitter or the like. Can be set. A value corresponding to the reset value is newly displayed as a bar.

  Therefore, the user can directly adjust the image 41 and the image 42 displayed at the same time and look at the adjustment image 43 so that the image becomes a desired one. Here, since a displayed image is not a still image but a moving image, adjustments such as I / P conversion, three-dimensional YC separation processing, DNR processing, and super-resolution processing can be easily performed. Further, since two independent image processing engines are used, it is easy to reduce and display each image. Further, as shown in FIG. 4A, the images 41 and 42 are displayed side by side without any gaps, so that the images can be easily compared. Thereafter, in the normal mode, the image after adjustment by the image processing engine (B-ch) 17 is displayed on the FPD 22 in full screen as shown in FIG.

  In the above embodiment, the images 41 and 42 in FIG. 4A can be set as a still image or a moving image according to the preference of the user. However, when adjusting the I / P conversion or the like, both 41 and 42 are preferably moving images.

  Various other display forms of the two images displayed in the adjustment mode are possible. FIG. 5 is an example of this. In this example, the image processing engine (A-ch) 16 takes out only the left half of the image in FIG. 3, and the image processing engine (B-ch) 17 takes out only the right half of the image in FIG. The adjustment parameter is changed only in B-ch) 17. That is, in this case, two images are displayed adjacent to each other without a gap so as to form one image based on the input image signal. As a result, in the FPD 22, the image 51 is displayed on the left side, the image 52 is displayed on the right side, and the adjustment image 53 is displayed by OSD processing. Even when this display is used, the user can easily adjust the image in the same manner. In the case of FIG. 4, the resolution of the displayed images 41 and 42 is deteriorated by the amount reduced compared to the image 31 of FIG. 3, but in this case, there is no change in resolution. Therefore, adjustment can be performed while maintaining the same resolution. In particular, it is particularly easy to make a comparison near the boundary between the images 51 and 52 (the left and right center lines in FIG. 4). At this time, the ratio of the horizontal length of the image 51 and the horizontal length of the image 52 can be arbitrarily set. In the case of FIG. 4, the ratio of 1: 1 is, for example, 1: 2 or the like. By doing, it can be set as the form which is easier to compare.

  Further, when it is desired to see both of the images to be compared, as shown in FIG. 6, the images 61 and 62 are both formed as an image obtained by reducing the image of FIG. Can be displayed. Although the resolution of the images 61 and 62 in this case is deteriorated, the comparison can be made for the entire image. At this time, the vertical / horizontal ratio is the same as the reduction ratio. If the image signal conforms to the NTSC standard with a resolution of 720 × 480, the resolution of the images 61 and 62 is 720 × 480 when the image aspect ratio is 4: 3, and 853 when the image aspect ratio is 16: 9. × 480 can be displayed on the 1920 × 1080 screen. If the image conforms to the PAL standard, the number of effective display lines is 768 × 576 when the aspect ratio of the image is 4: 3 and 963 × 576 when the aspect ratio is 16: 9. It can be compared as a state of maintaining. In this case, since the comparison can be performed with the same number of pixels in the finally displayed image, more appropriate adjustment can be performed. In this case, the image output by each image processing engine is different from the image in FIG. 2, and the image processing engine (A-ch) 16 has an image on the left half excluding the adjustment image 63 in the image in FIG. 6. The image with the right half blank is output, and the image processing engine (B-ch) 17 outputs only the right half image and outputs the image with the left half blank.

  On the other hand, if the magnification of the image is changed in the vertical or horizontal direction, the image quality may look different. Therefore, the same operation is performed by cutting out only a part of the original image (FIG. 3) without changing the magnification. Can also be done. FIG. 7 is an example of an image displayed in this case. Here, both the image 71 and the image 72 are images obtained by cutting out the same portion that is a part of the original image without changing the magnification of the original image, and the adjustment image 73 is similarly displayed.

  Further, if there is a portion that should be particularly noted in the image, an enlarged image of this portion can be displayed in the same manner as in FIG. An example of this is shown in FIG. Here, FIG. 8A is an image corresponding to the images 41 and 42 in FIG. 4A, and an area surrounded by a broken line is a portion to be noted in the image in FIG. An image obtained by enlarging this portion and processing the image so as to fit on the display screen of the FPD 22 is pan-scanned as shown in FIG. 8B and displayed together with the adjustment image 83 as images 81 and 82. In this case, the comparison with respect to the focused portion is particularly easily performed.

  When the adjustment image is displayed, the above comparison can be performed more easily by making it semi-transparent. For example, as shown in FIG. 9, a translucent adjustment image 93 can be displayed on the images 91 and 92 by OSD.

  In each of the above examples, the so-called PAP (Picture And Picture) display in which the left image and the right image are displayed side by side is used. However, the present invention is not limited to this. For example, it is also possible to use PIP (Picture In Picture) display in which one screen is displayed in full screen and the other image is smaller than this and displayed in part.

  In the case of FIGS. 4 to 9, the image with the adjustment parameter set to the initial value is displayed on the left image, and the image after the adjustment parameter is changed is displayed on the right side. However, the present invention is not limited to this. It is also possible to display an adjustment image for the left image and an adjustment image for the right image and perform the adjustment independently on the left and right screens. In that case, for example, by providing a selector switch on the remote control transmitter, the user selects which image to set, and then sets the value of the adjustment parameter to the operation key on the remote control transmitter. Can be set using.

  In the above examples, the images displayed on the left and right are the same images shown in FIG. However, it is also possible to display images based on different images on the left and right, for example, images corresponding to different times in the moving image. FIG. 10 is a display example in which the original images of the left image 101 and the right image 102 are different. This is because the memory (A-ch) 18 and the memory (B-ch) 19 store the image signal of the moving image output from the input multiplexer 15, and the image processing engine (A-ch) 16 and the image processing engine are stored. (B-ch) 17 corresponds to a case where images at different times in the moving image are displayed. In this case, unlike the above case, both the image processing engine (A-ch) 16 and the image processing engine (B-ch) 17 output an image corresponding to the adjustment parameter corresponding to the display of the adjustment image 93. can do. For example, a portion having the brightest background in the moving image is displayed as the image 101, and a portion having the darkest background in the same moving image is displayed as the image 102. In this case, if the adjustment parameters can be optimized for these two images, good image quality can be obtained even in other scenes in which the background is between these two images. Since this image display device 10 has a plurality of combinations of memories and image processing engines, such processing is particularly easily performed. Such an operation is particularly suitable when a playback screen such as a DVD is displayed, that is, when an image signal input from a video playback device such as a DVD player is used in FIG. Therefore, it is preferable that the memory (A-ch) 18 and the memory (B-ch) 19 can store images for a long time. For this purpose, it is preferable that these capacities are large.

  Similarly to the above, only one image can be a moving image and the other image can be a still image. In order to make the above adjustment easier for the user, various interfaces are provided in addition to the configuration of FIG. 1, and a menu screen for each process is created in the OSD drawing block 21, so that the adjustment image is displayed. Alternatively, it may be displayed at the same time.

  In this adjustment mode, the size of the left image (81 etc.) and the right image (82 etc.), the position in the original image (FIG. 3), etc. can be freely set. This is because the position and size of the image 201 shown in FIG. 2A, the position and size of the image 203 shown in FIG. 2B, or the original images of the images 201 and 203 (FIG. 3). This range is realized by a configuration in which the user can freely set the range.

  It is preferable that this operation by the user can be performed by an operation key of the remote control transmitter. Therefore, for example, a remote control transmitter 150 whose appearance is shown in FIG. 11 can be used. In this remote control transmitter 150, a number of operation keys are used. In addition to the power key 151, a magnification change (MAGNIFY) key unit 152, a pointer key 153, a pointer movement key unit 154, a resize key 155, and the like are used. It has been. The magnification change key unit 152 includes a + key 1521 and a − key 1522, and the pointer movement key unit 154 includes a left key 1541, a right key 1542, an upper key 1543, a lower key 1544, and an enter (ENTER) key 1545. is there. Further, a screen change key 156 for performing an operation for changing the screen configuration is provided. The remote control transmitter 150 transmits a signal corresponding to the operation of these operation keys, the remote control receiving unit 27 receives this signal, and the control unit 25 controls the image processing engine (A-ch) 16 and the image processing engine ( B-ch) 17 is made to change the image accordingly.

  For example, when the magnification of the images 81 and 82 is changed, a desired magnification can be obtained by operating the + key 1521 or the − key 1522. Further, by pressing the pointer key 153, the pointer is displayed in the displayed image. For example, the position is moved to the user by using the left key 1541 or the like, and the enlarged portion of FIG. This point can be specified by specifying four vertices corresponding to. Further, the magnification can be returned to the standard by operating the resize key 155.

  The screen configuration shown in FIGS. 4 to 10 is determined by, for example, causing the OSD drawing block 21 to create a menu screen as shown in FIG. 12 by operating the screen change key 156 and selecting a desired screen configuration from the menu screen. The user can make settings using the upper key 1543 or the like. In FIG. 12, for example, when “Right” is selected, an adjustment parameter in the image processing engine (B-ch) 17 is set by the user, and the adjusted image is displayed on the right side. Conversely, when “Left” is selected, the adjusted image is displayed on the left side. Such processing can be freely set in accordance with whether the point to be noted in the image is on the right side or the left side.

  When “Shrink” is selected, the entire screen is reduced and displayed as shown in FIG. When “Native Reso” is selected, the original image is displayed with its resolution maintained. This selection can be freely set depending on whether the adjustment of the image is performed while paying attention to a part of the image or the entire image.

  When “1: 2 (Right)” is selected, the ratio of the horizontal lengths of the left image and the right image in FIG. 5 is set to 1: 2, and the user is particularly on the right side of the image. It can be set as the structure which can be noticed. When “2: 1 (Left)” is selected, the reverse configuration can be adopted. This can also be freely set according to the portion to be noted in the image.

  Further, in this image display device 10, since two independent image processing engines are used, each image can be arbitrarily shaped and sized even in cases other than the above.

  Therefore, the image display apparatus 10 adjusts and displays an image according to the flowchart shown in FIG. Here, after the adjustment mode is set (S11), the images output from the independent image processing engine (A-ch) 16 and image processing engine (B-ch) 17 are displayed in the form shown in FIGS. (Display process: S12). At this time, the value of the adjustment parameter is the initial value in both image processing engines. The user sees these images and the adjustment image and performs image adjustment processing. The image processing engine (B-ch) 17 outputs the adjusted image, and the adjustment parameters remain at the initial values. It is displayed again together with the image output from the image processing engine (A-ch) 16 (adjustment step: S13). If a desired image is obtained with the value of the adjustment parameter, the normal mode is set, and the image processed with the value of the adjustment parameter is displayed in full screen (S14). That is, in the image display device 10, an image adjustment method including the display process and the adjustment process is executed.

  Among these, the flowchart which shows the operation | movement from a display process to an adjustment process is FIG. First, in the display step, the display of the FPD 22 is a multi-screen (two-screen) display (S101), and the adjustment image is also OSD-displayed (S102), for example, the image shown in FIG. However, at this stage, the adjustment parameters used in the images 41 and 42 are both initial values and are the same image.

  Then, it becomes an adjustment process. In this adjustment step, the user sees these two images and performs the adjustment process (S103). In this processing, for example, which parameter (for example, brightness, contrast, etc.) in the adjustment image 43 is selected using the upper key 1543 and the lower key 1544 and the left key 1541 and the right key 1542 are operated. This is done by setting the value of the parameter selected by, and finally operating the enter key 1545. The image processing engine (B-ch) 17 outputs an image including the corrected image 42 corresponding to this as shown in FIG. The corrected image 42 and the image 41 before correction are displayed again (S101).

  Thereafter, the user compares these images. At this time, if the user desires to enlarge and compare these images (S104: YES), the user operates the + key 1521 or the-key 1522 of the remote control transmitter 150. The image processing engine (A-ch) 16 and the image processing engine (B-ch) 17 enlarge these images and display an image in which an area that does not fit on the original screen is cut (pan scan process: S105). This operation is repeated until the enlargement ratio reaches a desired value (S106: YES). When the desired value is reached, the image 82 adjusted with that value is redisplayed together with the image 81 before correction, for example, as shown in FIG. 8 (S101).

  On the other hand, when the user feels that the image is enlarged too much, the user operates the resize key 155 of the remote control transmitter 150 (S107: YES), so that the image processing engine (A-ch) is operated. 16 and the image processing engine (B-ch) 17 output the images 41 and 42 of the original magnification (S108) and display them (S101).

  With the above processing, for example, when the entire images 61 and 62 are displayed, the user can change the screen configuration to a form that makes it easier to compare these images (S109: YES). For example, the user can move the image 61 to a desired position by displaying a pointer on the image 61 and moving the pointer using any one of the operation keys of the pointer movement key unit 154. . This is done when the control unit 25 obtains the PAP parameter set by this operation and the image processing engine (A-ch) 16 changes the display position of the image 61 based on this (S110). Thereafter, redisplay is performed (S101).

  When the screen setting itself on the menu shown in FIG. 12 is changed (S111: YES), the OSD drawing block 21 creates and displays the menu shown in FIG. 12 by operating the screen change key 156. (S112). Here, when the setting on the menu is changed (S113: YES) and the user selects automatic parameter adjustment, the control unit 25 reads a default parameter corresponding to the setting from the memory (for control) 26 ( (S114: YES), the parameter is set to this value (S110), and re-display is performed (S101). The instruction for selecting automatic parameter adjustment (S114) can be displayed on the screen by, for example, OSD display, and the user can answer this using the operation keys in the pointer movement key unit 154. . The same applies to the setting instructions described below.

  When the setting on the menu is not changed (S113: NO), an instruction for setting whether or not one image is a still image is displayed on the screen (S115). If the user has made a setting for this, the image output from the image processing engine (A-ch) 16 and / or the image processing engine (B-ch) 17 is set as a still image (S116).

  Thereafter, an instruction as to whether or not adjustment is completed is displayed on the screen (S117). If there is an end setting (S117: YES), each parameter is stored in the memory (for control) 26 (S118), and the adjustment mode ends. It becomes. If there is no end setting (S117), the adjustment can be started again (S102). Even when automatic parameter adjustment is not selected (S114: NO), whether or not the adjustment is completed is selected (S117).

  In the adjustment process described above, the user can compare the images before and after the adjustment in a desired state and set the adjustment parameters appropriately. As a result, the adjustment mode ends.

  Upon completion of the adjustment mode, the image display apparatus shifts to the normal mode, and the image processing engine (A-ch) 16 or the image processing engine (B-ch) 17 receives the adjustment parameter value set by the above operation. The output is displayed on the FPD 22 as shown in FIG. As a result, the user can view a moving image having a desired image quality on a full screen.

  In the above operation, since the image display apparatus 10 uses two independent image processing engines, the two images can be compared in any form that is easy for the user to compare.

  In particular, as image processing to be adjusted, moving image data is used in I / P conversion, DNR processing, MNR processing, BMR processing, three-dimensional YC separation processing, etc., and therefore comparison as moving images is necessary. It is. Even in such a case, these adjustments can be easily performed in the image display device 10.

  In the above example, both the image processing engine (A-ch) 16 and the image processing engine (B-ch) 17 have a moving image adjustment function. For example, only the image processing engine (B-ch) 17 is used. The same operation can be carried out even when has the function.

  In the above example, two independent image processing engines are used. However, this number is three or more, and the same effect can be obtained even when three or more images are displayed simultaneously. It is clear to play. In this case, a plurality of types of adjustment parameter values can be used, and moving images corresponding to the values can be displayed simultaneously. At this time, adjustment images can also be displayed according to this number.

It is a figure which shows the structure of the image display apparatus used as embodiment of this invention. It is a figure which shows the structure of the image output from the image processing engine in the image display apparatus used as embodiment of this invention. It is an example of the image displayed. It is an example of the display screen in adjustment mode. It is another example of the display screen in adjustment mode. It is another example of the display screen in adjustment mode. It is another example of the display screen in adjustment mode. It is another example of the display screen in adjustment mode. It is another example of the display screen in adjustment mode. It is another example of the display screen in adjustment mode. It is an example of a structure of the remote control transmitter used in the image display apparatus used as the embodiment of the present invention. It is an example of the menu screen in the image display apparatus used as the embodiment of the present invention. It is a flowchart which shows operation | movement of the image display apparatus used as embodiment of this invention. It is a flowchart which shows the operation | movement in the image adjustment method used as embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image display apparatus 11 Image signal A / D converter 12 HDMI / DVI signal receiver 13 Video signal decoder 14 Tuner 15 Input multiplexer 16 Image processing engine (A-ch)
17 Image processing engine (B-ch)
18 Memory (A-ch)
19 Memory (B-ch)
20 Overlay device (overlay part)
21 OSD drawing block 22 FPD
23 Output formatter 24 Panel driver 25 Control unit 26 Memory (for control)
27 Remote control receiver
41, 42, 51, 52, 61, 62, 71, 72, 81, 82, 91, 92, 101, 102 Image 43, 53, 63, 73, 83, 93, 103 Adjustment image
150 Remote Control Transmitter 151 Power Key 152 Magnification Change Key 153 Pointer Key 154 Pointer Move Key 155 Resize Key 156 Screen Change Key 1521 + Key 1522 -Key 1541 Left Key 1542 Right Key 1543 Upper Key 1544 Lower Key 1545 Enter (ENTER) key

Claims (25)

An image display device that processes an input image signal and displays a moving image,
A plurality of image processing engines each of which receives the image signal and outputs a moving image;
A display unit that simultaneously displays a plurality of moving images output from the plurality of image processing engines,
At least one of the plurality of image processing engines includes an adjustment function of the moving image. An overlay unit that displays an image based on an image signal output from the plurality of image processing engines so as to be superimposed on the display unit;
The image display apparatus according to claim 1, wherein each of the plurality of image processing engines outputs an image signal of an image including a part of an image corresponding to the input image signal.   The position and size occupied by an image corresponding to the input image signal in an image corresponding to an image signal output by the plurality of image processing engines can be set by a user. 2. The image display device according to 2.   4. The image display device according to claim 1, further comprising a plurality of memories that are connected to the plurality of image processing engines and store the image signals. 5.   The image display device according to claim 4, wherein the display unit simultaneously displays images corresponding to different times in the moving images processed by the plurality of image processing engines.   6. The image display apparatus according to claim 1, wherein the adjustment function performs three-dimensional image processing with one axis as a time axis.   The adjustment functions include I / P (interlace / progressive) conversion, three-dimensional YC separation processing, DNR (digital noise reduction) processing, MNR (mosquito noise reduction) processing, BNR (block noise reduction) processing, and super-resolution processing. The image display device according to claim 6, wherein at least one of the adjustments is performed.   The adjustment function adjusts at least one of brightness (brightness), contrast, chromaticity, hue, RGB balance, color temperature, and γ curve in the moving image. The image display device according to any one of the above.   The image display device according to claim 1, wherein the image signal is input from a video reproduction device.   In the display unit, when moving images processed by the plurality of image processing engines are simultaneously displayed on the display unit, an adjustment image for displaying a parameter value in the adjustment function is superimposed and displayed. The image display device according to any one of claims 1 to 9, wherein   11. The image display device according to claim 1, wherein a menu screen for processing performed in the adjustment function is superimposed on the display unit. 11. An image adjustment method for adjusting an input image signal in order to display a moving image,
A display step of inputting the same image signal to a plurality of independent image processing engines and simultaneously displaying the plurality of output images on the same screen;
In at least one of the plurality of image processing engines, an adjustment step of causing a user to perform image adjustment processing and simultaneously redisplaying the plurality of images including the image after the adjustment processing on the same screen;
An image adjustment method comprising: In the display step and the adjustment step,
The plurality of image processing engines each output an image signal of an image partially including an image corresponding to the input image signal, and superimpose and display an image based on the image signal. Item 13. The image adjustment method according to Item 12.   The position and size occupied by an image corresponding to the input image signal in an image corresponding to an image signal output by the plurality of image processing engines is set by a user. Image adjustment method.   15. The image adjustment method according to claim 14, wherein the setting by the user is performed using an operation key of a remote control transmitter.   The image according to any one of claims 12 to 15, wherein the image processing engine stores the input image signal and outputs an image based on the stored image signal. Adjustment method.   The image adjustment method according to claim 16, wherein in the display step and the adjustment step, images corresponding to different times in the moving images processed by the plurality of image processing engines are simultaneously displayed.   The image adjustment method according to any one of claims 12 to 17, wherein in the adjustment process, three-dimensional image processing is performed with one axis as a time axis.   In the adjustment processing, I / P (interlace / progressive) conversion, three-dimensional YC separation processing, DNR (digital noise reduction) processing, MNR (mosquito noise reduction) processing, BNR (block noise reduction) processing, super-resolution processing The image adjustment method according to claim 18, wherein at least one of the adjustments is performed.   20. The adjustment process includes adjusting at least one of brightness (brightness), contrast, chromaticity, hue, RGB balance, color temperature, and γ curve in the moving image. The image adjustment method according to any one of the above.   21. The adjustment process according to claim 12, wherein in the adjustment step, an adjustment image for displaying a parameter value in the adjustment process is displayed together with the plurality of images. Image adjustment method.   The image adjustment method according to any one of claims 12 to 21, wherein in the adjustment step, a menu screen of processing performed in the adjustment function is displayed in a superimposed manner.   23. The method according to claim 12, wherein, in the adjustment step, the plurality of images are displayed adjacent to each other without a gap so as to form one image based on the input image signal. The image adjustment method according to item.   The image adjustment method according to any one of claims 12 to 22, wherein in the adjustment step, a partially enlarged image of at least one of the plurality of images is displayed.   The image adjustment method according to any one of claims 12 to 24, wherein, in the adjustment step, at least one of the plurality of images is displayed as a still image.