JP2013114112A - Resolution converting device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a configuration that enables up-convert compatible with diverse scanning systems at low costs.SOLUTION: A screen corresponding to inputted image signals is split into two sub-screens; up-convert to complement pixels is processed in each of the two split sub-screens; image signals corresponding to the first sub-screen are held in a plurality of line memories in a first memory block; image signals corresponding to the second sub-screen are held in a plurality of line memories in a second memory block; signals held in the plurality of line memories in the first memory block are read out in a first sequence determined by the scanning system of the display device connected to the memories; and signals held in the plurality of line memories in the second memory block are read out in a second sequence determined by the scanning system of the display device.

Description

  The present technology relates to a resolution conversion apparatus and method, and more particularly, to a resolution conversion apparatus and method capable of realizing a configuration capable of up-conversion corresponding to various scanning methods at low cost.

  In recent years, the size of display devices has been increasing.

  A so-called 2K resolution display device has a resolution of 1920 × 1080 pixels. On the other hand, a so-called 4K resolution display device has a resolution of 3840 × 2160 pixels, 4096 × 2160 pixels, or the like.

  For example, when displaying a 2K resolution image signal (2K signal) on a 4K resolution display device, it is necessary to upconvert the 2K signal to a 4K signal to match the resolution. For this reason, a resolution conversion technique has attracted attention.

  For example, a resolution conversion technique has been proposed for displaying an image on a multi-display in which a plurality of display devices are combined to function as one display device (see, for example, Patent Document 1).

JP 2003-280623 A

  By the way, there is no standard method for scanning 4K signals in a 4K display device, and the method is determined for each display device.

  For example, there is a single screen method that uniformly scans a 4K resolution screen, or a split screen method that scans a 4K resolution screen by dividing it into a plurality of screens.

  In addition, among the split screen methods, there is a horizontal / vertical split method that is a small screen of a quarter of the screen of 4K resolution and that divides the screen into four small screens in the upper left, upper right, lower right, and lower left. Exists. Further, among the split screen methods, for example, there is a horizontal split method that divides a small screen having a quarter area of a 4K resolution screen into small screens arranged in a horizontal row. The horizontal / vertical division method is sometimes referred to as a rice character division method because, for example, a figure composed of four divided small screens is similar to the character “Ta” in Chinese characters. Further, the horizontal division method is sometimes referred to as a blind division method because of the shape of the divided small screen.

  When the horizontal / vertical division method is adopted, the method for scanning each small screen can be further subdivided into a horizontal / vertical division normal method and a horizontal / vertical division raising method.

  In the horizontal and vertical division normal method, for example, each small screen is scanned as follows. That is, for each small screen, a pixel in the horizontal line is scanned from the pixel at the upper left of the screen to the right in the horizontal direction, and if it is scanned to the right end, it is lowered one step in the vertical direction. Be scanned.

  In the horizontal / vertical division upwelling method, for example, each small screen is scanned as follows.

  That is, for the small screen on the upper left, starting from the pixel at the lower right of the screen, scan one row of pixels to the left in the horizontal direction, scan up to the left edge, and go up one step in the vertical direction, and from right to left Scan the next line. For the lower left small screen, start from the pixel at the upper right of the screen, scan one row of pixels to the left in the horizontal direction, and when scanned to the left end, go down one step in the vertical direction, and from right to left in the same way Scan the next line. Furthermore, for the small screen on the upper right, start from the pixel at the lower left of the screen, scan one row of pixels to the right in the horizontal direction, move up to the right edge, and then go up one step in the vertical direction, and from left to right in the same way Scan the next line. For the lower right small screen, start from the pixel at the upper left of the screen, scan one row of pixels to the right in the horizontal direction, and when scanned to the right end, go down one step in the vertical direction, and from left to right in the same way Scan the next line.

  When such a scan is performed, the scanned pixels are felt as if they are springing from the center of the 4K resolution screen toward the four corners, so this is referred to as a horizontal / vertical split spring method.

  As described above, there are a plurality of scanning methods for scanning a 4K signal in a 4K display device.

  In the above-described scanning methods, when up-conversion is performed, for example, in the case of the horizontal and vertical division method, the 2K signal is divided into four and distributed to four up-conversion LSIs. Then, each of the four images corresponding to the distributed signal is up-converted into an independent 2K resolution image (a corresponding 2K signal), and the output of the four images is combined and transferred as a 4K signal.

  However, in this method, a frame memory is required for each up-convert LSI, which increases the cost. Further, even when an LSI without a frame memory is used, an LSI (previous LSI) for dividing the 2K signal and supplying the pixels individually is required before the upconvert LSI. In this method, it is necessary to provide four up-convert LSIs in addition to the preceding LSI, which also increases the cost.

  Further, for example, when the horizontal division method is adopted in the conventional technique, an LSI (rear LSI) for rearranging the pixels of the output signal and a frame memory are required in addition to the pre-stage LSI. become.

  For example, when the display device is a projector, a trapezoidal correction function is required. However, when the conventional up-convert LSI is used, it is not possible to correct keystone correctly in an image obtained by combining individual divided small screens.

  The present technology is disclosed in view of such a situation, and is intended to realize a configuration capable of up-conversion corresponding to various scanning methods at low cost.

  One aspect of the present technology divides a screen corresponding to the image signal into two small screens for the input image signal, and holds a image signal corresponding to each of the divided small screens; In each of the two small screens corresponding to the image signal read from the holding unit, an up-conversion unit that performs an up-conversion process that complements pixels, and the two small screens that have undergone the up-conversion process Among them, the image signal corresponding to the first small screen is held in the plurality of line memories in the first memory block, and the image signal corresponding to the second small screen is stored in the plurality of lines in the second memory block. A first signal that is held in a line memory and that is held in each of the plurality of line memories of the first memory block is determined according to a scanning method of a display device connected to the first memory block. And a scan changing unit that reads out signals held in a plurality of line memories of the second memory block in a second order determined according to a scanning method of the display device. is there.

  When the image signal corresponding to each of the small screens is read, the holding unit changes the order of the pixels in the image signal for each of the small screens based on the scanning method of the display device. Can do.

  The holding unit is input when the scanning method of the display device is such that the screen of the display device is divided into four small screens in the horizontal and vertical directions, and each small screen is scanned simultaneously. The screen corresponding to the image signal can be divided into an upper half small screen in the vertical direction and a lower half small screen in the vertical direction, and the image signal corresponding to each of the divided small screens can be held.

  In the case where the scanning method of the display device is such that the screen of the display device divides the screen of the display device into four small screens in the horizontal direction and is simultaneously scanned on each small screen, or the display device The screen corresponding to the input image signal is divided into a small screen composed only of odd lines and a small screen composed only of even lines, An image signal corresponding to each of the divided small screens can be held.

  In the scan changing unit, the first memory block and the second memory block each have four line memories, and the first memory block and the second memory block perform the up-conversion process. When the image signals corresponding to each of the two small screens are held, the four line memories are provided according to the scanning method of the display device, the first line memory to the fourth line memory. It is possible to switch whether the image signals are sequentially input to the line memory, or whether a part of the image signals is simultaneously input to each of the first to fourth line memories. .

  In the scan changing unit, each of the first memory block and the second memory block has four line memories, and the scanning method of the display device has four screens in the horizontal and vertical directions. In the case of the horizontal and vertical division normal method in which the screen is divided into small screens and simultaneously raster-scanned in each of the small screens, one of the four line memories of either the first memory block or the second memory block, The signals held in the first line memory and the third line memory are simultaneously read in the same order, and at the same time, among the four line memories of the other memory block, the first line memory and the third line memory The signals held in the second line memory can be read simultaneously in the same order.

  In the scan changing unit, each of the first memory block and the second memory block has four line memories, and the scanning method of the display device has four screens in the horizontal and vertical directions. When splitting into small screens, and scanning in each small screen is a horizontal and vertical split source method where the pixels are scanned as if they protrude from the center of the display device toward the four corners. The signals held in the first line memory and the third line memory among the four line memories of either the first memory block or the second memory block are reversed in the reverse order. At the same time of reading, the first line memory and the third line memory among the four line memories of the other memory block are held. No. and it can be made to read at the same time in the reverse order.

  In the scan changing unit, each of the first memory block and the second memory block has four line memories, and the scanning method of the display device uses four small screens in the horizontal direction. In the case of a horizontal division method in which the image is divided into screens and raster scanned on each small screen, the signals held in each of the four line memories of the first memory block are simultaneously read in the same order, The signals held in each of the four line memories of the second memory block can be read simultaneously in the same order.

  In the scan changing unit, the first memory block and the second memory block each have four line memories, and the scanning method of the display device is scanned without dividing the screen of the display device. Each of the four line memories of the first memory block and each of the four line memories of the second memory block respectively hold a signal for one pixel, and The signals held in each of the four line memories of one memory block are simultaneously read out in the same order, and then the signals held in each of the four line memories in the second memory block are simultaneously read in the same order. It can be made to read.

  A supply unit that extracts a signal corresponding to a pixel in a line corresponding to a pixel that is complemented by the up-conversion unit from the image signal read from the holding unit and supplies the signal to the up-conversion unit; Can be.

  The up-conversion unit may further perform trapezoidal correction or aspect conversion when executing the up-conversion process.

  In one aspect of the present technology, the holding unit divides the screen corresponding to the image signal into two small screens for the input image signal, and holds the image signal corresponding to each of the divided small screens. The up-conversion unit performs up-conversion processing for complementing pixels in each of the two small screens corresponding to the image signal read from the holding unit, and the scan change unit performs the up-conversion processing. Of the two small screens, an image signal corresponding to the first small screen is held in a plurality of line memories in the first memory block, and an image signal corresponding to the second small screen is stored in the second small screen. Are stored in a plurality of line memories in the first memory block, and the signals respectively stored in the plurality of line memories in the first memory block are used as a scanning method for a display device connected to the first memory block. Resolution conversion including a step of reading in a first order determined in accordance with a second order, and reading signals held in the plurality of line memories of the second memory block in a second order determined in accordance with a scanning method of the display device Is the method.

  In one aspect of the present technology, for an input image signal, the screen corresponding to the image signal is divided into two small screens, and the image signal corresponding to each of the divided small screens is held, and the holding is performed. In each of the two small screens corresponding to the image signal read out from the unit, an up-conversion process for complementing pixels is executed, and the first small screen out of the two small screens subjected to the up-conversion process is executed. An image signal corresponding to the screen is held in a plurality of line memories in the first memory block, and an image signal corresponding to the second small screen is held in a plurality of line memories in the second memory block, When the signals respectively held in the plurality of line memories of the first memory block are read out in a first order determined according to the scanning method of the display device connected to the first memory block. Moni, respectively held signal into a plurality of line memories of the second memory block is read in a second sequence determined according to the method of scanning of the display device.

  According to the present technology, it is possible to realize a configuration that enables up-conversion corresponding to various scanning methods at low cost.

It is a block diagram which shows the structural example of the conventional resolution converter 10. FIG. It is a figure which shows the example of a single screen system. It is a figure which shows the example of a horizontal-vertical division | segmentation normal system. It is a figure which shows the example of a horizontal-vertical division | segmentation springing system. It is a figure which shows the example of a horizontal division system. It is a block diagram which shows the structural example of the resolution converter which concerns on one embodiment of this technique. It is a figure explaining the input to a memory control part, and the output from a memory control part. It is a figure explaining the input to a vertical expansion | deployment part and the output from a vertical expansion | deployment part. It is a figure which shows the detailed structural example of an up-conversion part. It is a figure explaining the relationship between the position of the pixel of 2K signal, and the position of the pixel of 4K signal. 3 is a diagram illustrating a detailed configuration example of a scan change unit 140. FIG. It is a figure explaining the order of writing of each line memory, and the order of reading in case a horizontal / vertical division | segmentation normal system is employ | adopted. It is a figure explaining the order of writing of each line memory, and the order of reading in case a horizontal-vertical division | segmentation springing system is employ | adopted. It is a figure explaining the order of writing and reading-out of each line memory in case a horizontal division system is adopted. It is a figure explaining the order of writing and reading-out of each line memory in case a single screen system is adopted. It is a flowchart explaining the example of a resolution conversion process. It is a flowchart explaining the example of a screen division process. It is a flowchart explaining the example of a vertical expansion | deployment process. It is a flowchart explaining the example of a scan change process.

  Hereinafter, embodiments of the technology disclosed herein will be described with reference to the drawings.

  First, a conventional up-conversion method will be described.

  A so-called 2K resolution display device has a resolution of 1920 × 1080 pixels. On the other hand, a so-called 4K resolution display device has a resolution of 3840 × 2160 pixels, 4096 × 2160 pixels, or the like.

  For example, when displaying a 2K resolution image signal (2K signal) on a 4K resolution display device, it is necessary to upconvert the 2K signal to a 4K signal to match the resolution.

  FIG. 1 is a block diagram illustrating a configuration example of a conventional resolution conversion apparatus 10. The resolution conversion apparatus 10 shown in the figure is configured to up-convert an input 2K signal into a 4K signal and output it.

  As shown in the figure, the input 2K signal is divided into four signals corresponding to each area of the screen. In other words, the screen 30 of 2K resolution is a small screen having a quarter area, and is divided into four small screens in the upper left, upper right, lower right, and lower left, and a 2K signal corresponding to each small screen is input. Is done.

  That is, the 2K signal corresponding to the small screen 31 at the upper left of the screen 30 is input to the up-convert LSI 21-1. The 2K signal corresponding to the small screen 32 at the upper right of the screen 30 is input to the up-convert LSI 21-2. The 2K signal corresponding to the small screen 33 at the lower left of the screen 30 is input to the up-convert LSI 21-3. The 2K signal corresponding to the small screen 34 at the lower right of the screen 30 is input to the up-convert LSI 21-4.

  Each of the up-convert LSI 21-1 to the up-convert LSI 21-4 performs an up-conversion process that complements the pixels of the input 2K signal. In the up-conversion process, a pixel at a predetermined position in the input signal is extracted and subjected to a predetermined calculation to calculate a pixel value in the output signal. For example, when up-converting a 2K signal to a 4K signal, four pixels of the output signal are generated corresponding to one pixel of the input signal.

  When the up-conversion process is executed, the input 2K signal is once held in the frame memory 22-1 to the frame memory 22-4. Each of the up-convert LSI 21-1 to the up-convert LSI 21-4 converts the pixel value of the input signal necessary for obtaining the pixel value of the pixel to be generated in the output signal into the frame memory 22-1 to the frame memory 22-4. Read from. Then, the up-convert LSI 21-1 to the up-convert LSI 21-4 calculate the pixel value of the output signal and generate pixels.

  That is, the up-convert LSI 21-1 to the up-convert LSI 21-4 enlarge each of the small screen 31 to the small screen 34 to one 2K resolution screen configured by four times the number of pixels.

  By performing the processing as described above, output signals are output from the up-convert LSI 21-1 to the up-convert LSI 21-4.

  That is, the up-convert LSI 21-1 outputs a 2K signal corresponding to the small screen 41 at the upper left of the 4K resolution screen. The up-convert LSI 21-2 outputs a 2K signal corresponding to the small screen 42 at the upper right of the 4K resolution screen. The up-convert LSI 21-3 outputs a 2K signal corresponding to the small screen 43 at the lower left of the 4K resolution screen. The up-convert LSI 21-4 outputs a 2K signal corresponding to the small screen 44 at the lower right of the 4K resolution screen.

  By combining the 2K signals corresponding to the small screen 41 to the small screen 44, a 4K signal corresponding to the 4K resolution screen 40 can be obtained.

  However, there is no standard method for scanning 4K signals in a 4K display device, and a scanning method is determined for each display device.

  For example, there is a single screen method that uniformly scans a 4K resolution screen, or a split screen method that scans a 4K resolution screen by dividing it into a plurality of screens.

  FIG. 2 is a diagram illustrating an example of a single screen method. In the single screen method, as indicated by an arrow in the figure, in the screen 40 of 4K resolution, one line of pixels is scanned from the upper left pixel of the screen 40 to the right in the horizontal direction. Step down and scan the next line from left to right in the same way. Such a scan is also called a raster scan.

  On the other hand, among the split screen methods, there is a horizontal / vertical split method which is a small screen of a quarter of the screen of 4K resolution and which is divided into four small screens at the upper left, upper right, lower right and lower left. Exists. Further, among the split screen methods, for example, there is a horizontal split method that divides a small screen having a quarter area of a 4K resolution screen into small screens arranged in a horizontal row. The horizontal / vertical division method is sometimes referred to as a rice character division method because, for example, a figure composed of four divided small screens is similar to the character “Ta” in Chinese characters. Further, the horizontal division method is sometimes referred to as a blind division method because of the shape of the divided small screen.

  When the horizontal / vertical division method is adopted, the method for scanning each small screen can be further subdivided into a horizontal / vertical division normal method and a horizontal / vertical division raising method.

  FIG. 3 is a diagram illustrating an example of the horizontal / vertical division normal method. As shown in the figure, in the case of the horizontal and vertical division normal method, the screen 40 with 4K resolution is a small screen having a quarter area, and the upper left, the upper right, the lower right, and the lower left four small screens. 41 to small screen 44.

  In the horizontal / vertical division normal method, for example, as shown by arrows in FIG. 3, four small screens constituting the 4K resolution screen 40 are scanned. That is, for each of the small screen 41 to the small screen 44, one row of pixels is scanned to the right in the horizontal direction from the pixel at the upper left of the screen, and when it is scanned to the right end, it is lowered by one step in the vertical direction. The next line is scanned to the right.

  FIG. 4 is a diagram illustrating an example of a horizontal / vertical divided upwelling system. As shown in the figure, in the case of the horizontal and vertical split well method, the 4K resolution screen 40 is also a small screen having an area of a quarter, and includes four upper left, upper right, lower right, and lower left. The screen is divided into a small screen 41 to a small screen 44.

  In the horizontal / vertical split spring method, for example, as shown by arrows in FIG. 4, four small screens constituting the 4K resolution screen 40 are scanned.

  That is, for the small screen 41 at the upper left, starting from the pixel at the lower right of the screen, scan one row of pixels to the left in the horizontal direction, and when scanning to the left end, it goes up one step in the vertical direction, and from the right in the same way Scan the next line to the left. For the lower left small screen 43, the pixel at the upper right of the screen is the starting point, scan one row of pixels to the left in the horizontal direction, and when scanned to the left end, it goes down one step in the vertical direction, and from right to left Scan the next line. Furthermore, for the small screen 42 in the upper right, the pixel at the lower left of the screen is used as a starting point, the pixels in one row are scanned to the right in the horizontal direction, and when scanned to the right end, the pixels are moved up one step in the vertical direction. Scan the next line. The lower right small screen 44 starts from the upper left pixel of the screen, scans one row of pixels to the right in the horizontal direction, and when scanned to the right end, goes down one step in the vertical direction. Scan the next line to the right.

  When such a scan is performed, the scanned pixels are felt as if they are springing out from the center of the screen 40 with 4K resolution toward the four corners. .

  FIG. 5 is a diagram illustrating an example of the horizontal division method. As shown in the figure, in the case of the horizontal division method, the 4K resolution screen 40 is divided into small screens 51 to 54 arranged in a line in the horizontal direction.

  In the horizontal division method, for example, as shown by the arrows in FIG. 5, four small screens constituting the 4K resolution screen 40 are scanned. That is, for each of the small screen 51 to the small screen 54, one row of pixels is scanned rightward in the horizontal direction from the upper left pixel of the screen, and when it is scanned to the right end, it is lowered one step in the vertical direction. The next line is scanned to the right.

  The resolution conversion apparatus 10 shown in FIG. 1 can be said to correspond to the horizontal / vertical division normal method of FIG. 3 among the four methods described above with reference to FIGS. If the resolution conversion apparatus 10 is adapted to the method of FIG. 2, FIG. 4, or FIG. 5, it is necessary to rearrange the input signal and the output signal to the up-convert LSI 21-1 to the up-convert LSI 21-4. .

  Further, in the case of the resolution conversion apparatus 10 shown in FIG. 1, it is necessary to connect the frame memory 22-1 to the frame memory 22-4 to each of the up-convert LSI 21-1 to the up-convert LSI 21-4. become. If a configuration that does not require the frame memory 22-1 to the frame memory 22-4 is adopted, for example, the 2K signal is divided and supplied to the up-convert LSI 21-1 to the up-convert LSI 21-4. Therefore, an LSI (previous LSI) is required. That is, in this case as well, it is necessary to provide a preceding LSI in addition to the up-convert LSI 21-1 to the up-convert LSI 21-4, which also increases the cost.

  Therefore, the present technology discloses a resolution conversion apparatus that can correspond to each of the four systems described above with reference to FIGS. 2 to 5 and can be configured at low cost.

  FIG. 6 is a block diagram illustrating a configuration example of the resolution conversion apparatus according to the embodiment of the present technology. The resolution conversion apparatus 100 shown in the figure is configured to up-convert an input 2K signal into a 4K signal and output it. The 4K signal output from the resolution conversion device 100 is supplied to, for example, a 4K resolution display device connected to the resolution conversion device 10.

  In this example, the resolution conversion apparatus 100 includes a memory control unit 110, a vertical development unit 120, an up-conversion unit 130-1, an up-conversion unit 130-2, and a scan change unit 140.

  For example, the memory control unit 110 includes a memory that holds a 2K signal corresponding to an image for one frame.

  FIG. 7 is a diagram for explaining an input to the memory control unit 110 and an output from the memory control unit 110. As shown in the figure, the 2K signal corresponding to the 2K resolution screen 200 is input to the memory control unit 110.

  The memory control unit 110 divides a screen corresponding to the input 2K signal into two small screens, and holds an image signal corresponding to each of the divided small screens.

  In the 4K resolution display device, when the horizontal / vertical division normal method is adopted, the memory control unit 110 divides the screen 200 into the upper half screen 201 in the vertical direction and the lower half screen 202 in the vertical direction, A 2K signal corresponding to each screen is supplied to the vertical development unit 120. Then, for each of the screen 201 and the screen 202, the memory control unit 110 outputs one row of pixels to the right in the horizontal direction from the upper left pixel of the screen, and when output to the right end, the memory control unit 110 moves down one step in the vertical direction. Similarly, the next line is output from left to right.

  When the horizontal / vertical division normal method is adopted, the memory control unit 110 supplies the 2K signal corresponding to the screen 201 and the 2K signal corresponding to the screen 202 to the vertical development unit 120 in this way.

  In a 4K resolution display device, when the horizontal / vertical split spring method is adopted, the memory control unit 110 divides the screen 200 into a vertical upper half screen 211 and a vertical lower half screen 212. The 2K signal corresponding to each screen is supplied to the vertical development unit 120. Then, the memory control unit 110 starts the pixel at the lower left of the screen with respect to the screen 211, outputs one row of pixels to the right in the horizontal direction, goes up to the right end, goes up one step in the vertical direction, and similarly Outputs the next line to the right. In addition, the memory control unit 110 starts the pixel at the upper left corner of the screen 212, outputs one row of pixels to the right in the horizontal direction, and when it reaches the right end, goes down one step in the vertical direction, Outputs the next line to the right.

  When the horizontal / vertical split spring method is employed, the memory control unit 110 supplies the 2K signal corresponding to the screen 211 and the 2K signal corresponding to the screen 212 to the vertical development unit 120 in this way.

  In the 4K resolution display device, when the single screen method or the horizontal division method is adopted, the memory control unit 110 displays the screen 200 as a screen 221 configured only by pixels (odd lines) in odd-numbered rows. Then, the screen is divided into screens 222 composed only of pixels in even-numbered rows (even-numbered lines), and 2K signals corresponding to the respective screens are supplied to the vertical development unit 120.

  Then, for each of the screen 221 and the screen 222, the memory control unit 110 outputs one row of pixels to the right in the horizontal direction from the upper left pixel of the screen. Similarly, the next line is output from left to right.

  When the single screen method or the horizontal division method is adopted, the memory control unit 110 supplies the 2K signal corresponding to the screen 221 and the 2K signal corresponding to the screen 222 to the vertical development unit 120 in this way. .

  As described above, when the memory control unit 110 supplies the held 2K signal to the vertical development unit 120, the memory control unit 110 changes the order of the pixels in the 2K signal according to the scanning method of the 4K resolution display device. Yes. Further, the order of the pixels in the 2K signal is changed for each small screen.

  The vertical development unit 120 has, for example, a configuration having a plurality of line memories therein, and supplies pixels for a plurality of lines to each of the up-conversion unit 130-1 and the up-conversion unit 130-2. Yes. Here, the line means pixels for one row in the screen.

  FIG. 8 is a diagram for explaining the input to the vertical development unit 120 and the output from the vertical development unit 120. The line memories 121-1 to 121-4 shown in the figure hold the pixels constituting the screen 201, the screen 211, or the screen 221 one line at a time. In addition, the line memories 122-1 to 122-4 hold the pixels constituting the screen 202, the screen 212, or the screen 222 one line at a time.

  Based on the request from the up-conversion unit 130-1, the vertical development unit 120, for example, the pixels for four lines at positions corresponding to the pixel lines generated in the 4K resolution screen by the up-conversion unit 130-1. Supply. For example, when the pixels of the second row line are generated in the 4K resolution screen by the up-conversion unit 130-1, the lines from the first row to the fourth row surface in the screen 201 are displayed. Pixels are supplied.

  Further, based on the request from the up-conversion unit 130-2, the vertical development unit 120, for example, for four lines at positions corresponding to the pixel lines generated in the 4K resolution screen by the up-conversion unit 130-2. Supply pixels. For example, in the case where the up-conversion unit 130-2 generates the pixel of the line on the 402nd line in the screen of 4K resolution, the lines on the first to fourth lines in the screen 201 are displayed. Pixels are supplied.

  When a single screen method or a horizontal division method is adopted in a 4K resolution display device, the vertical development unit 120 rearranges each line of the screen 221 and the screen 222, and then selects four lines of pixels. The up-conversion unit 130-1 or the up-conversion unit 130-2 is supplied.

  For example, when the odd-numbered pixels are generated in the 4K resolution screen by the up-conversion unit 130-1, the odd-numbered and even-numbered lines on the screen 221 and the screen 222 are alternately rearranged. The corresponding pixels for four lines are supplied from the inside. Further, for example, when even-numbered lines of pixels are generated in the 4K resolution screen by the up-conversion unit 130-2, the odd-numbered lines and the even-numbered lines on the screen 221 and the screen 222 are alternately arranged. The corresponding four lines of pixels are supplied from the image.

  Although the example in which the vertical development unit 120 supplies pixels for four lines has been described here, the present invention is not limited to this. That is, the vertical development unit 120 supplies the pixels of the 2K signal necessary for calculating the pixel value of the pixel generated by the up-conversion unit 130-1 or the up-conversion unit 130-2 to a plurality of line units. It is supposed to be.

  Further, the line supplied from the vertical developing unit 120 may be changed as necessary. For example, when the horizontal / vertical division normal method or the horizontal / vertical division spring method is adopted, the up-convert unit 130-1 generates vertical pixels so that a part of the pixels in the lower half of the vertical direction is generated. A predetermined line of pixels may be supplied from the development unit 120. In addition, pixels of a predetermined line may be supplied from the vertical development unit 120 so that the up-conversion unit 130-2 generates some pixels of the upper half screen in the vertical direction.

  For example, when image processing is performed on each of the divided screens in the subsequent stage of the resolution conversion apparatus 100, some pixels are processed by the up-conversion unit 130-1 and the up-conversion unit 130-2 as described above. Can be generated by superimposing, so that the joints of the screens at the division boundaries can be made inconspicuous.

  The up-conversion unit 130-1 and the up-conversion unit 130-2 are configured to execute an up-conversion process that complements pixels in the input 2K signal. In the up-conversion process, a pixel at a predetermined position in the input 2K signal is extracted and subjected to a predetermined calculation, whereby a pixel value in the output 4K signal is calculated. For example, when up-converting a 2K signal to a 4K signal, four pixels of the output signal are generated corresponding to one pixel of the input signal.

  FIG. 9 is a diagram illustrating a detailed configuration example of the up-conversion unit 130-1. In addition, the structure of the same figure is applied similarly to the up-conversion part 130-2.

  As shown in FIG. 9, the up-conversion unit 130-1 includes an up-converter 131 and an input / output corresponding coordinate calculation unit 132 inside.

  For example, the input / output corresponding coordinate calculation unit 132 is configured to calculate the coordinates of the pixel generated in the output 4K signal corresponding to each pixel of the input 2K signal. Further, the input / output correspondence coordinate calculation unit 132 is configured to specify a pixel in the 2K signal necessary for calculating the value of the pixel generated in the 4K signal.

  The up-converter 131 calculates a value of the pixel of the 4K signal by performing a predetermined operation on the value of the pixel in the 2K signal specified by the input / output correspondence coordinate calculation unit 132, and the pixel whose value is calculated Are arranged at the coordinates calculated by the input / output correspondence coordinate calculation unit 132. In this manner, the up-converter 131 generates four 4K signal pixels corresponding to one 2K signal pixel. As a result, the 4K signal obtained by quadrupling the number of pixels of the 2K signal is output from the up-converter 131.

  Note that, as described above with reference to FIG. 7, when the horizontal / vertical division normal method or the horizontal / vertical division welling method is adopted, the memory control unit 110 displays the screen 200 in the upper half screen 201 or The screen 211 is divided into the lower half screen 202 or the screen 211 in the vertical direction and supplied to the vertical development unit 120.

  Therefore, when the horizontal / vertical division normal method or the horizontal / vertical division source method is adopted, the up-conversion unit 130-1 generates a 4K signal corresponding to a screen (image) in which the number of pixels of the upper half screen is quadrupled. Is output. Further, the up-conversion unit 130-2 outputs a 4K signal corresponding to a screen (image) obtained by quadrupling the number of pixels of the lower half screen.

  In addition, as described above with reference to FIG. 7, when the single screen method or the horizontal division method is adopted, the memory control unit 110, the screen 200, the screen 221 including only odd lines, and the even number The image is divided into screens 222 composed only of lines and supplied to the vertical development unit 120.

  Accordingly, when the single screen method or the horizontal division method is employed, the 4K signal corresponding to the screen (image) obtained by quadrupling the number of pixels of the screen configured by only the odd lines by the up-conversion unit 130-1. Is output. In addition, the up-conversion unit 130-2 outputs a 4K signal corresponding to a screen (image) obtained by quadrupling the number of pixels of the screen configured by only even lines.

  Furthermore, the up-conversion unit 130-1 and the up-conversion unit 130-2 can also perform keystone correction, for example, as necessary. That is, the shape of the entire image corresponding to the 4K signal can be changed by changing the calculation formula of the coordinates of the pixel generated in the 4K signal by the input / output corresponding coordinate calculation unit 132.

  FIG. 10A is a diagram illustrating the relationship between the pixel position of the 2K signal and the pixel position of the 4K signal when normal up-conversion is performed when the 2K signal is up-converted to the 4K signal. In the figure, pixels of 2K signal are indicated by white circles, and pixels of 4K signal are indicated by black circles. In the case of FIG. 10A, four 4K signal pixels are regularly arranged around each 2K signal pixel.

  FIG. 10B is a diagram illustrating the relationship between the pixel position of the 2K signal and the pixel position of the 4K signal when trapezoidal correction is performed when up-converting the 2K signal to the 4K signal. In the figure, pixels of 2K signal are indicated by white circles, and pixels of 4K signal are indicated by black circles. In the case of FIG. 10B, four 4K signal pixels are arranged around each of the 2K signal pixels, but are not regularly arranged as in FIG. 10A. That is, the interval between the pixels of the 4K signal is set wide on the upper side in the drawing, and the interval between the pixels of the 4K signal is set narrow on the lower side in the drawing.

  In the case of FIG. 10B, the image is composed of pixels indicated by black circles in the drawing, and the shape of the entire image corresponding to the 4K signal is a trapezoid. By performing such trapezoidal correction, for example, an image without distortion can be displayed even when the optical axis of light emitted from the projector is not perpendicular to the screen.

  Here, an example in which trapezoidal correction is performed has been described, but it is also possible to similarly perform aspect conversion of an image corresponding to a 4K signal.

  In this way, the up-conversion unit 130-1 and the up-conversion unit 130-2 each output a 4K signal, and the 4K signal is supplied to the scan change unit 140.

  For example, the scan changing unit 140 includes a plurality of live memories, and outputs pixel values read from the live memories in a predetermined order, thereby outputting a 4K signal input to a 4K resolution display device. Generate.

  FIG. 11 is a diagram illustrating a detailed configuration example of the scan changing unit 140 in FIG. 6. As shown in the figure, the scan changing unit 140 includes a memory block 141 to a memory block 144. Each of the memory blocks 141 to 144 has four line memories.

  The 4K signal output from the up-conversion unit 130-1 is supplied to the memory block 141 and stored in the line memories 141-1 to 141-4. Each of the line memories 141-1 to 141-4 holds pixel values for ¼ line in an image corresponding to a 4K signal. For example, the pixel values for one line of the 4K signal output from the up-conversion unit 130-1 are sequentially stored in the line memories 141-1 to 141-4. In this case, if the pixel values stored in the line memories 141-1 to 141-4 are sequentially output from the line memory 141-1, one line worth of 4K signals output from the up-conversion unit 130-1. Pixel values can be reproduced.

  When one of the memory block 141 and the memory block 142 is a write operation, the other is a read operation. That is, while the memory block 141 during the writing operation stores the pixel values for one line of the 4K signal output from the up-conversion unit 130-1, the memory block 142 performs the reading operation. At this time, a 4K signal composed of pixel values read from the line memories 142-1 to 142-4 becomes a part of the output signal of the resolution conversion apparatus 100.

  When the writing of the pixel values for one line of the 4K signal in the memory block 141 and the reading of the pixel values of one line of the 4K signal in the memory block 142 are completed, the read / write operation is switched, and the memory block 141 is switched. Are read operations, and the memory block 142 performs a write operation. In this case, a 4K signal composed of pixel values read from the line memories 141-1 to 141-4 becomes a part of the output signal of the resolution conversion apparatus 100.

  In this way, the above-described operation is repeated every time reading and writing for one line of the 4K signal is completed.

  The 4K signal output from the up-conversion unit 130-2 is supplied to the memory block 143 and stored in the line memories 143-1 to 143-4. Each of the line memories 143-1 to 143-4 is configured to hold pixel values for ¼ line in an image corresponding to a 4K signal. For example, pixel values for one line of the 4K signal output from the up-conversion unit 130-2 are sequentially stored in the line memories 143-1 to 143-4. In this case, if the pixel values stored in the line memories 143-1 to 143-4 are output in order from the line memory 143-1, one line of the 4K signal output from the up-conversion unit 130-2 is output. Pixel values can be reproduced.

  When one of the memory block 143 and the memory block 144 is a write operation, the other is a read operation. That is, while the memory block 143 during the writing operation stores the pixel values for one line of the 4K signal output from the up-conversion unit 130-1, the memory block 144 performs the reading operation. At this time, a 4K signal composed of pixel values read from the line memories 144-1 to 144-4 becomes a part of the output signal of the resolution conversion apparatus 100.

  When the writing of the pixel values for one line of the 4K signal in the memory block 143 and the reading of the pixel values of one line of the 4K signal in the memory block 144 are completed, the read / write operation is switched, and the memory block 143 is switched. Are read operations, and the memory block 144 performs a write operation. In this case, a 4K signal composed of pixel values read from the line memories 143-1 to 143-4 is part of the output signal of the resolution conversion apparatus 100.

  In this way, the above-described operation is repeated every time reading and writing for one line of the 4K signal is completed.

  The scan changing unit 140 changes the reading order of each line memory of the memory block 142 and each line memory of the memory block 144 in accordance with, for example, each scan method described above with reference to FIGS. It is made like that.

  FIG. 12 is a diagram for explaining the writing order and reading order of each line memory when the horizontal / vertical division normal method described above with reference to FIG. 3 is adopted in a 4K resolution display device. In the figure, it is assumed that a storage element corresponding to the first address exists at the left end portion of each line memory in the drawing, and a storage element corresponding to the last address exists at the right end portion in the drawing. That is, the pixel value of the input 4K signal will be described as being stored in order from the left to the right of each line memory.

  In FIG. 12, the 4K signal output from the up-conversion unit 130-1 is supplied to the memory block 141 and stored in the line memories 141-1 to 141-4. At this time, as indicated by an arrow 151 in the drawing, the pixel value of the first 1/4 line is stored in the line memory 141-1, and the pixel value of the next 1/4 line is stored in the line memory 141-2. Is done. Further, the pixel value of the next quarter line is stored in the line memory 141-3, and the pixel value of the last quarter line is stored in the line memory 141-4.

  As described above, when the horizontal / vertical division normal method is adopted, the 4K signal output from the up-conversion unit 130-1 corresponds to the upper half screen (image) in the vertical direction.

  On the other hand, in FIG. 12, when a 4K signal is output, the pixel value is read from each line memory of the memory block 142. At this time, as indicated by arrows 152-1 and 152-2 in the figure, two pixel values are read out in parallel. That is, as indicated by an arrow 152-1, pixel values from the first address to the last address of the line memory 142-1 are output in order, and then the first address to the last address of the line memory 142-2. The pixel values up to are output in order. At the same time, as indicated by an arrow 152-2, pixel values from the first address to the last address of the line memory 142-3 are output in order, and then from the first address of the line memory 142-4 to the last address Pixel values up to the address are output in order.

  The 4K signal composed of the pixel values read in correspondence with the arrow 152-1 is 4K resolution as a signal for displaying an image of the upper left small screen (for example, the small screen 41 in FIG. 3) of the display device. To the display device. Further, the 4K signal composed of the pixel values read in correspondence with the arrow 152-2 is used as a signal for displaying an image of the small screen on the upper right of the display device (for example, the small screen 42 in FIG. 3). It is supplied to a 4K resolution display device.

  In FIG. 12, the 4K signal output from the up-conversion unit 130-2 is supplied to the memory block 143 and stored in the line memories 143-1 to 143-4. At this time, as indicated by an arrow 153 in the figure, the pixel value of the first 1/4 line is stored in the line memory 143-1, and the pixel value of the next 1/4 line is stored in the line memory 143-2. Is done. Further, the pixel value of the next 1/4 line is stored in the line memory 143-3, and the pixel value of the last 1/4 line is stored in the line memory 143-4.

  As described above, when the horizontal / vertical division normal method is adopted, the 4K signal output from the up-conversion unit 130-2 corresponds to the lower half screen (image) in the vertical direction.

  On the other hand, in FIG. 12, when a 4K signal is output, pixel values are read from each line memory of the memory block 144. At this time, as indicated by arrows 154-1 and 154-2 in the figure, two pixel values are read out in parallel. That is, as indicated by an arrow 154-1, pixel values from the first address to the last address of the line memory 144-1 are output in order, and then the first address to the last address of the line memory 144-2 are output. The pixel values up to are output in order. At the same time, as indicated by an arrow 154-2, the pixel values from the first address to the last address of the line memory 144-3 are output in order, and then the first address of the line memory 144-4 to the last address are output. Pixel values up to the address are output in order.

  The 4K signal composed of the pixel values read in correspondence with the arrow 154-1 is 4K resolution as a signal for displaying an image of the small screen on the lower left of the display device (for example, the small screen 43 in FIG. 3). To the display device. Further, the 4K signal composed of the pixel values read out corresponding to the arrow 154-2 is a signal for displaying an image of the small screen on the upper right of the display device (for example, the small screen 44 in FIG. 3). It is supplied to a 4K resolution display device.

  The four 4K signals output in parallel in this way are input to the 4K resolution display device, so that the scan in the horizontal / vertical division normal method is performed as described above with reference to FIG. An image is displayed on the display device.

  FIG. 13 is a diagram for explaining the writing order and reading order of each line memory in the case where the horizontal and vertical division well-out method described above with reference to FIG. 4 is adopted in a 4K resolution display device. In the figure, it is assumed that a storage element corresponding to the first address exists at the left end portion of each line memory in the drawing, and a storage element corresponding to the last address exists at the right end portion in the drawing. That is, the pixel value of the input 4K signal will be described as being stored in order from the left to the right of each line memory.

  In FIG. 13, the 4K signal output from the up-conversion unit 130-1 is supplied to the memory block 141 and stored in the line memories 141-1 to 141-4. At this time, as indicated by an arrow 161 in the figure, the pixel value of the first 1/4 line is stored in the line memory 141-1, and the pixel value of the next 1/4 line is stored in the line memory 141-2. Is done. Further, the pixel value of the next quarter line is stored in the line memory 141-3, and the pixel value of the last quarter line is stored in the line memory 141-4.

  As described above, when the horizontal / vertical division source method is adopted, the 4K signal output from the up-conversion unit 130-1 corresponds to the upper half screen (image) in the vertical direction. .

  On the other hand, in FIG. 13, when a 4K signal is output, pixel values are read from each line memory of the memory block 142. At this time, two pixel values are read out in parallel as indicated by arrows 162-1 and 162-2 in FIG. That is, as indicated by the arrow 162-1, pixel values from the last address of the line memory 142-2 to the first address are output in order, and then the last address to the first address of the line memory 142-1. The pixel values up to are output in order. At the same time, as indicated by an arrow 162-2, the pixel values from the first address to the last address of the line memory 142-3 are output in order, and then from the first address of the line memory 142-4 to the last address. Pixel values up to the address are output in order.

  The 4K signal composed of the pixel values read in correspondence with the arrow 162-1 is 4K resolution as a signal for displaying an image of the upper left small screen (for example, the small screen 41 in FIG. 4) of the display device. To the display device. Further, the 4K signal composed of the pixel values read out corresponding to the arrow 162-2 is used as a signal for displaying the image of the small screen on the upper right of the display device (for example, the small screen 42 in FIG. 4). It is supplied to a 4K resolution display device.

  In FIG. 13, the 4K signal output from the up-conversion unit 130-2 is supplied to the memory block 143 and stored in the line memories 143-1 to 143-4. At this time, as indicated by an arrow 163 in the drawing, the pixel value of the first 1/4 line is stored in the line memory 143-1, and the pixel value of the next 1/4 line is stored in the line memory 143-2. Is done. Further, the pixel value of the next 1/4 line is stored in the line memory 143-3, and the pixel value of the last 1/4 line is stored in the line memory 143-4.

  As described above, when the horizontal / vertical division source method is employed, the 4K signal output from the up-conversion unit 130-2 corresponds to the lower half screen (image) in the vertical direction. .

  On the other hand, in FIG. 13, when a 4K signal is output, the pixel value is read from each line memory of the memory block 144. At this time, as indicated by arrows 164-1 and 164-2 in the figure, two pixel values are read out in parallel. That is, as indicated by an arrow 164-1, pixel values from the last address of the line memory 144-2 to the first address are output in order, and then the first address from the last address of the line memory 144-1 is output. The pixel values up to are output in order. At the same time, as indicated by an arrow 164-2, pixel values from the first address of the line memory 144-3 to the last address are output in order, and then the first address of the line memory 144-4 and the last address are output. Pixel values up to the address are output in order.

  The 4K signal composed of the pixel values read in correspondence with the arrow 164-1 is 4K resolution as a signal for displaying an image of the small screen on the lower left of the display device (for example, the small screen 43 in FIG. 4). To the display device. Further, the 4K signal composed of the pixel values read out corresponding to the arrow 164-2 is a signal for displaying an image of the small screen on the lower right of the display device (for example, the small screen 44 in FIG. 4). As a 4K resolution display device.

  The four 4K signals output in parallel in this way are input to the display device having the 4K resolution, so that the scanning by the horizontal and vertical division well-out method as described above with reference to FIG. An image is displayed on a display device having a resolution.

  FIG. 14 is a diagram for explaining the writing order and reading order of each line memory when the horizontal division method described above with reference to FIG. 5 is adopted in a 4K resolution display device. In the figure, it is assumed that a storage element corresponding to the first address exists at the left end portion of each line memory in the drawing, and a storage element corresponding to the last address exists at the right end portion in the drawing. That is, the pixel value of the input 4K signal will be described as being stored in order from the left to the right of each line memory.

  In FIG. 14, the 4K signal output from the up-conversion unit 130-1 is supplied to the memory block 141 and stored in the line memories 141-1 to 141-4. At this time, as indicated by an arrow 171 in the figure, the pixel value of the first 1/4 line is stored in the line memory 141-1, and the pixel value of the next 1/4 line is stored in the line memory 141-2. Is done. Further, the pixel value of the next quarter line is stored in the line memory 141-3, and the pixel value of the last quarter line is stored in the line memory 141-4.

  As described above, when the horizontal division method is employed, the 4K signal output from the up-conversion unit 130-1 corresponds to a screen (image) including only odd lines.

  On the other hand, in FIG. 14, when a 4K signal is output, the pixel value is read from each line memory of the memory block 142. At this time, as indicated by arrows 172-1 to 172-4 in the figure, four pixel values are read out in parallel. That is, as indicated by an arrow 172-1, pixel values from the first address to the last address of the line memory 142-1 are output in order. At the same time, as indicated by an arrow 172-2, pixel values from the first address to the last address of the line memory 142-2 are sequentially output. At the same time, as indicated by an arrow 172-3, pixel values from the first address to the last address of the line memory 142-3 are sequentially output. At the same time, as indicated by an arrow 172-4, pixel values from the first address to the last address of the line memory 142-4 are sequentially output.

  The 4K signal composed of the pixel values read out in correspondence with the arrow 172-1 is displayed with a 4K resolution as a signal for displaying an image of a small screen (for example, the small screen 51 in FIG. 5) of the display device. Supplied to the device. Further, the 4K signal composed of the pixel values read out corresponding to the arrow 172-2 is a signal for displaying an image of another small screen (for example, the small screen 52 in FIG. 5) of the display device. It is supplied to a 4K resolution display device. Further, the 4K signal composed of the pixel value read out in correspondence with the arrow 172-3 is a signal for displaying an image of still another small screen (for example, the small screen 53 in FIG. 5) of the display device. As a 4K resolution display device. Further, the 4K signal composed of the pixel values read out corresponding to the arrow 172-4 is a signal for displaying an image of still another small screen (for example, the small screen 54 in FIG. 5) of the display device. As a 4K resolution display device.

  In FIG. 14, the 4K signal output from the up-conversion unit 130-2 is supplied to the memory block 143 and stored in the line memories 143-1 to 143-4. At this time, as indicated by an arrow 173 in the figure, the pixel value of the first 1/4 line is stored in the line memory 143-1, and the pixel value of the next 1/4 line is stored in the line memory 143-2. Is done. Further, the pixel value of the next 1/4 line is stored in the line memory 143-3, and the pixel value of the last 1/4 line is stored in the line memory 143-4.

  As described above, when the horizontal division method is employed, the 4K signal output from the up-conversion unit 130-2 corresponds to a screen (image) that includes only even lines.

  On the other hand, in FIG. 14, when a 4K signal is output, the pixel value is read from each line memory of the memory block 142. At this time, as indicated by arrows 174-1 to 174-4 in the figure, four pixel values are read out in parallel. That is, as indicated by an arrow 174-1, pixel values from the first address to the last address of the line memory 144-1 are output in order. At the same time, as indicated by an arrow 174-2, pixel values from the first address to the last address of the line memory 144-2 are output in order. At the same time, as indicated by an arrow 174-3, pixel values from the first address to the last address of the line memory 144-3 are output in order. At the same time, as indicated by an arrow 174-4, pixel values from the first address to the last address of the line memory 144-4 are output in order.

  The 4K signal composed of the pixel values read in correspondence with the arrow 174-1 is a 4K resolution display as a signal for displaying an image of a small screen (for example, the small screen 51 in FIG. 5) of the display device. Supplied to the device. Further, the 4K signal composed of the pixel values read out corresponding to the arrow 174-2 is a signal for displaying an image of another small screen (for example, the small screen 52 in FIG. 5) of the display device. It is supplied to a 4K resolution display device. Further, the 4K signal constituted by the pixel value read out in correspondence with the arrow 174-3 is a signal for displaying an image of still another small screen (for example, the small screen 53 in FIG. 5) of the display device. As a 4K resolution display device. Further, the 4K signal composed of the pixel values read out corresponding to the arrow 174-4 is a signal for displaying an image of still another small screen (for example, the small screen 54 in FIG. 5) of the display device. As a 4K resolution display device.

  As described above, when the horizontal division method is employed, the 4K signal output from the up-conversion unit 130-1 is always a 4K signal for displaying pixels on odd lines. Further, the 4K signal output from the up-conversion unit 130-2 is always a 4K signal for displaying pixels of even lines. Accordingly, in this case, the scan changing unit 140 outputs the four 4K signals output from the memory block 142 to the display device, and then outputs the four 4K signals output from the memory block 144 to the display device. In other words, the scan changing unit 140 alternately switches and outputs a 4K signal for displaying pixels on odd lines and a 4K signal for displaying pixels on even lines.

  The four 4K signals output in parallel in this way are input to the 4K resolution display device, so that the scanning by the horizontal division method as described above with reference to FIG. 5 is performed and the 4K resolution display is performed. An image will be displayed on the device.

  FIG. 15 is a diagram for explaining the writing order and reading order of each line memory when the single-screen method described above with reference to FIG. 2 is adopted in a 4K resolution display device. In the figure, it is assumed that a storage element corresponding to the first address exists at the left end portion of each line memory in the drawing, and a storage element corresponding to the last address exists at the right end portion in the drawing. That is, the pixel value of the input 4K signal will be described as being stored in order from the left to the right of each line memory.

  In FIG. 15, the 4K signal output from the up-conversion unit 130-1 is supplied to the memory block 141 and stored in the line memories 141-1 to 141-4. At this time, as indicated by arrows 181-1 to 181-4 in the figure, one pixel value is simultaneously stored in each of the line memories 141-1 to 181-4.

  For example, in the first line, when pixels are arranged as numbers 0, 1, 2, 3, 4, 5, 6, 7,..., Pixel values are stored as follows. That is, the value of the number 0 pixel is stored in the line memory 141-1, the value of the number 1 pixel is stored in the line memory 141-2, and the value of the number 2 pixel is stored in the line memory 141-3. The value of the pixel number 3 is stored in the line memory 141-4. The value of the pixel No. 4 is stored in the line memory 141-1, the value of the pixel No. 5 is stored in the line memory 141-2, and the value of the pixel No. 6 is stored in the line memory 141-3. The value of the pixel of number 7 is stored in the line memory 141-4.

  Thus, for example, the pixel values of numbers 0, 4, 8, 16,... Are sequentially stored in the line memory 141-1, and the pixel values of ¼ line are stored. . In the line memory 141-2, for example, pixel values of numbers 1, 5, 9, 17,... Are sequentially stored, and 1/4 line pixel values are stored. Similarly, the line memory 141-3 and the line memory 141-4 also store pixel values of a predetermined number, and each 1/4 line pixel value is stored.

  As described above, when the single screen method is employed, the 4K signal output from the up-conversion unit 130-1 corresponds to a screen (image) including only odd lines.

  On the other hand, in FIG. 15, when a 4K signal is output, pixel values are read from each line memory of the memory block 142. At this time, as indicated by arrows 182-1 to 182-4 in the figure, four pixel values are read out in parallel. That is, as indicated by an arrow 182-1, pixel values from the first address to the last address of the line memory 142-1 are output in order. At the same time, as indicated by an arrow 182-2, pixel values from the first address to the last address of the line memory 142-2 are output in order. At the same time, as indicated by an arrow 182-2, pixel values from the first address to the last address of the line memory 142-3 are sequentially output. At the same time, as indicated by an arrow 182-4, pixel values from the first address to the last address of the line memory 142-4 are output in order.

  In this case, the 4K signal composed of the pixel values read out corresponding to the arrows 182-1 to 182-4 displays an image on the screen of the display device (for example, the screen 40 in FIG. 2). Is supplied to a 4K resolution display device.

  In FIG. 15, the 4K signal output from the up-conversion unit 130-2 is supplied to the memory block 143 and stored in the line memories 143-1 to 143-4. At this time, as indicated by arrows 183-1 to 183-4 in the figure, one pixel value is simultaneously stored in each of the line memories 143-1 to 183-4.

  That is, as in the case of the memory block 141, the line memory 143-1 stores, for example, the pixel values of numbers 0, 4, 8, 16,. Will be memorized. In the line memory 143-2, for example, pixel values of numbers 1, 5, 9, 17,... Are sequentially stored, and 1/4 line pixel values are stored. Similarly, the line memory 143-3 and the line memory 143-4 store the pixel values of a predetermined number, and each 1/4 pixel value is stored.

  As described above, when the single screen method is employed, the 4K signal output from the up-conversion unit 130-2 corresponds to a screen (image) including only even lines.

  On the other hand, in FIG. 15, when a 4K signal is output, pixel values are read from each line memory of the memory block 144. At this time, as indicated by arrows 184-1 to 184-4 in the figure, four pixel values are read out in parallel. That is, as indicated by an arrow 184-1, pixel values from the first address to the last address of the line memory 144-1 are output in order. At the same time, as indicated by an arrow 184-2, pixel values from the first address to the last address of the line memory 144-2 are output in order. At the same time, as indicated by an arrow 184-3, pixel values from the first address to the last address of the line memory 144-3 are output in order. At the same time, as indicated by an arrow 184-4, pixel values from the first address to the last address of the line memory 144-4 are output in order.

  In this case, the 4K signal composed of the pixel values read in correspondence with the arrows 184-1 to 184-4 displays an image on the screen of the display device (for example, the screen 40 in FIG. 2). Is supplied to a 4K resolution display device.

  As described above, when the single screen division method is employed, the 4K signal output from the up-conversion unit 130-1 is always a 4K signal for displaying pixels on odd lines. Further, the 4K signal output from the up-conversion unit 130-2 is always a 4K signal for displaying pixels of even lines. Accordingly, in this case, the scan changing unit 140 outputs the four 4K signals output from the memory block 142 to the display device, and then outputs the four 4K signals output from the memory block 144 to the display device. In other words, the scan changing unit 140 alternately switches and outputs a 4K signal for displaying pixels on odd lines and a 4K signal for displaying pixels on even lines.

  The four 4K signals output in parallel in this way are input to the 4K resolution display device, so that the single screen scan as described above with reference to FIG. 2 is performed and the 4K resolution display is performed. An image will be displayed on the device.

  As described above, according to the present technology, even if any of the four methods described above with reference to FIGS. 2 to 5 is employed in the display device, the display device is up-converted in a method corresponding to the display device. be able to.

  Further, according to the present technology, it is possible to up-convert the resolution conversion apparatus 100 with a single configuration regardless of which method is used, and to supply a low-cost and highly compatible resolution conversion apparatus. Become.

  Furthermore, according to the present technology, it is possible to realize up-conversion that has been subjected to processing such as keystone correction and aspect conversion as required, regardless of which method is used.

  Next, an example of resolution conversion processing by the resolution conversion apparatus 100 of FIG. 6 will be described with reference to the flowchart of FIG. This processing is executed, for example, when the input 2K signal is up-converted and output to a 4K resolution display device.

  Note that, for example, it is assumed that the resolution conversion apparatus 100 has transmitted information for identifying a scanning method employed in a display device connected to the resolution conversion apparatus 100.

  In step S21, the memory control unit 110 stores the input signal. At this time, for example, a 2K signal corresponding to an image for one frame is held in the memory.

  In step S <b> 22, the memory control unit 110 executes a screen division process which will be described later with reference to FIG. 17.

  Here, a detailed example of the screen division processing in step S22 in FIG. 16 will be described with reference to the flowchart in FIG.

  In step S41, the memory control unit 110 checks the scanning method of the display device. At this time, for example, it is specified which one of the four methods described above with reference to FIGS. 2 to 5 is used as the scanning method employed in the display device from which the resolution conversion apparatus 100 outputs a signal.

  In step S42, the memory control unit 110 determines whether or not the scanning method specified as a result of the processing in step S41 is a horizontal / vertical division method. At this time, for example, it is determined whether or not the scanning method of the display device is the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division welling method shown in FIG.

  If it is determined in step S42 that the scanning method of the display device is the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division welling method shown in FIG. 4, the process proceeds to step S44. .

  In step S44, the memory control unit 110 divides the image (screen) corresponding to the input signal into an upper half and a lower half in the vertical direction.

  At this time, for example, as described above with reference to FIG. 7, the memory control unit 110 divides the screen 200 into the upper half screen 201 in the vertical direction and the lower half screen 202 in the vertical direction. A 2K signal corresponding to the screen is supplied to the vertical development unit 120. Then, for each of the screen 201 and the screen 202, the memory control unit 110 outputs one row of pixels to the right in the horizontal direction from the upper left pixel of the screen, and when output to the right end, the memory control unit 110 moves down one step in the vertical direction. Similarly, the next line is output from left to right.

  On the other hand, if it is determined in step S42 that the scanning method of the display device is not the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division well-out method shown in FIG. 4, the process proceeds to step S43. Proceed to In this case, the scanning method of the display device is the single screen method shown in FIG. 2 or the horizontal division method shown in FIG.

  In step S43, the memory control unit 110 divides the image (screen) corresponding to the input signal into an odd line screen and an even line screen.

  At this time, for example, as described above with reference to FIG. 7, the memory control unit 110 divides the screen 200 into a screen 221 including only odd lines and a screen 222 including only even lines. The 2K signal corresponding to each screen is supplied to the vertical development unit 120. Then, for each of the screen 221 and the screen 222, the memory control unit 110 outputs one row of pixels to the right in the horizontal direction from the upper left pixel of the screen. Similarly, the next line is output from left to right.

  In this way, the screen division process is executed.

  Returning to FIG. 16, after the process of step S22, the process proceeds to step S23.

  In step S23, the vertical development unit 120 executes vertical development processing described later with reference to the flowchart of FIG.

  Here, a detailed example of the vertical development process in step S23 of FIG. 16 will be described with reference to the flowchart of FIG.

  In step S61, the vertical development unit 120 checks the scanning method of the display device. At this time, for example, it is specified which one of the four methods described above with reference to FIGS. 2 to 5 is used as the scanning method employed in the display device from which the resolution conversion apparatus 100 outputs a signal.

  In step S62, the vertical development unit 120 determines whether the scan method specified as a result of the process in step S61 is a horizontal / vertical division method. At this time, for example, it is determined whether or not the scanning method of the display device is the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division welling method shown in FIG.

  If it is determined in step S62 that the scanning method of the display device is not the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division welling method shown in FIG. 4, the process proceeds to step S63. . In this case, the scanning method of the display device is the single screen method shown in FIG. 2 or the horizontal division method shown in FIG.

  In step S63, the line is reconfigured.

  On the other hand, if it is determined in step S62 that the scanning method of the display device is the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division well-out method shown in FIG. Skipped.

  If it is determined in step S62 that the scanning method of the display device is the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division welling method shown in FIG. 4, or the processing of step S63 Thereafter, the processing proceeds to step S64.

  In step S <b> 64, the vertical development unit 120 outputs the pixels of the line corresponding to the pixels to be generated from now.

  That is, as described above with reference to FIG. 8, the processing from step S62 to step S64 is executed.

  For example, based on a request from the up-conversion unit 130-1, the vertical development unit 120, for example, corresponds to four lines at positions corresponding to the pixel lines that the up-conversion unit 130-1 generates in the 4K resolution screen. Supply pixels. Further, based on the request from the up-conversion unit 130-2, the vertical development unit 120, for example, for four lines at positions corresponding to the pixel lines generated in the 4K resolution screen by the up-conversion unit 130-2. Supply pixels.

  Further, when a single screen method or a horizontal division method is adopted in a 4K resolution display device, the vertical development unit 120 rearranges (reconfigures) each line of the screen 221 and the screen 222, The pixels for four lines are supplied to the up-conversion unit 130-1 or the up-conversion unit 130-2.

  For example, when the odd-numbered pixels are generated in the 4K resolution screen by the up-conversion unit 130-1, the odd-numbered and even-numbered lines on the screen 221 and the screen 222 are alternately rearranged. The corresponding pixels for four lines are supplied from the inside. In addition, for example, when even-numbered lines of pixels are generated in the 4K resolution screen by the up-conversion unit 130-2, the odd-numbered lines and the even-numbered lines on the screen 221 and the screen 222 are alternately rearranged. The corresponding four lines of pixels are supplied from the image.

  In this way, the vertical development process is executed.

  Returning to FIG. 16, after the process of step S23, the process proceeds to step S24.

  In step S24, the up-conversion unit 130-1 and the up-conversion unit 130-2 generate pixels and perform up-conversion.

  At this time, for example, as described above with reference to FIG. 10A, pixels are generated and up-converted so that four 4K signal pixels are regularly arranged around each 2K signal pixel. .

  Alternatively, as described above with reference to FIG. 10B, keystone correction is performed as necessary. Note that aspect conversion may be performed.

  Returning to FIG. 16, after the process of step S24, the process proceeds to step S25.

  In step S25, the scan change unit 140 executes a scan change process which will be described later with reference to FIG.

  Here, a detailed example of the scan change processing in step S25 in FIG. 16 will be described with reference to the flowchart in FIG.

  In step S81, the scan changing unit 140 checks the scanning method of the display device. At this time, for example, it is specified which one of the four methods described above with reference to FIGS. 2 to 5 is used as the scanning method employed in the display device from which the resolution conversion apparatus 100 outputs a signal.

  In step S82, the scan changing unit 140 determines whether the scan method specified as a result of the process in step S61 is a horizontal / vertical division method. At this time, for example, it is determined whether or not the scanning method of the display device is the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division welling method shown in FIG.

  If it is determined in step S82 that the scanning method of the display device is the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division welling method shown in FIG. 4, the process proceeds to step S83. .

  In step S83, the scan changing unit 140 determines whether the scan method specified as a result of the process in step S61 is the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division welling method shown in FIG. Which method is selected.

  If it is determined in step S83 that the horizontal / vertical division normal method is used, the process proceeds to step S85.

  In step S85, the scan changing unit 140 controls writing / reading of the line memory corresponding to the horizontal / vertical division normal method. At this time, for example, as described above with reference to FIG. 12, the pixel values are written into the respective line memories of the scan changing unit 140, and the pixel values are read out.

  On the other hand, if it is determined in step S83 that the horizontal / vertical split spring method is used, the process proceeds to step S84.

  In step S <b> 84, the scan changing unit 140 controls writing / reading of the line memory corresponding to the horizontal / vertical division welling method. At this time, for example, as described above with reference to FIG. 13, pixel values are written into each line memory of the scan change unit 140, and those pixel values are read out.

  On the other hand, if it is determined in step S82 that the scanning method of the display device is not the horizontal / vertical division normal method shown in FIG. 3 or the horizontal / vertical division well-out method shown in FIG. 4, the process proceeds to step S86. Proceed to In this case, the scanning method of the display device is the single screen method shown in FIG. 2 or the horizontal division method shown in FIG.

  In step S86, the scan changing unit 140 determines whether the scan method specified as a result of the process in step S61 is the single screen method shown in FIG. 2 or the horizontal division method shown in FIG. Determine if there is.

  When it is determined in step S86 that the horizontal division method is used, the process proceeds to step S88.

  In step S88, the scan changing unit 140 controls writing and reading of the line memory corresponding to the horizontal division method. At this time, for example, as described above with reference to FIG. 14, pixel values are written into each line memory of the scan change unit 140, and those pixel values are read out.

  If it is determined in step S86 that the single screen method is used, the process proceeds to step S87.

  In step S87, the scan changing unit 140 controls writing and reading of the line memory corresponding to the single screen method. At this time, for example, as described above with reference to FIG. 15, the pixel values are written into each line memory of the scan change unit 140, and those pixel values are read out.

  In this way, the scan change process is executed.

  When the process shown in FIG. 19 ends, the resolution conversion process shown in FIG. 16 also ends.

  In this way, the resolution conversion process is executed.

  In the above, an example of resolution conversion in which a 2K signal is input and a 4K signal is output has been described, but the present technology can be applied to resolution conversion of signals other than these.

  Note that the series of processes described above in this specification includes processes that are performed in parallel or individually even if they are not necessarily processed in time series, as well as processes that are performed in time series in the order described. Is also included.

  The embodiments of the present technology are not limited to the above-described embodiments, and various modifications can be made without departing from the gist of the present technology.

  In addition, this technique can also take the following structures.

(1)
For the input image signal, the screen corresponding to the image signal is divided into two small screens, and a holding unit for holding the image signal corresponding to each of the divided small screens;
An up-conversion unit that performs up-conversion processing for complementing pixels in each of the two small screens corresponding to the image signal read from the holding unit;
Of the two small screens subjected to the up-conversion processing, the image signal corresponding to the first small screen is held in a plurality of line memories in the first memory block, and corresponds to the second small screen. Image signals to be stored in a plurality of line memories in the second memory block,
The signals held in the plurality of line memories of the first memory block are read in a first order determined according to the scanning method of the display device connected to the first memory block, and the plurality of second memory blocks And a scan changing unit that reads out signals held in the line memories in a second order determined according to a scanning method of the display device.
(2)
The holding part is
When image signals corresponding to each of the small screens are read out,
The resolution conversion apparatus according to (1), wherein the order of pixels in the image signal is changed for each of the small screens based on a scanning method of the display device.
(3)
The holding part is
When the scanning method of the display device is that the screen of the display device is divided into four small screens in the horizontal and vertical directions, and each small screen is scanned simultaneously,
The screen corresponding to the input image signal is divided into a small screen in the upper half of the vertical direction and a small screen in the lower half of the vertical direction, and the image signal corresponding to each of the divided small screens is held (1) Or the resolution conversion apparatus as described in (2).
(4)
The holding part is
When the scanning method of the display device is such that the screen of the display device is divided into four small screens in the horizontal direction and each small screen is scanned simultaneously, or the screen of the display device is divided. If you want to scan without
The screen corresponding to the input image signal is divided into a small screen composed only of odd lines and a small screen composed only of even lines, and image signals corresponding to the divided small screens The resolution conversion apparatus according to any one of (1) to (3).
(5)
The scan changing unit
Each of the first memory block and the second memory block has four line memories;
When the first memory block and the second memory block hold an image signal corresponding to each of the two small screens subjected to the up-conversion process,
Depending on the scanning method of the display device, the image signals are sequentially input to the first line memory to the fourth line memory, or the first line memory or the first line memory. The resolution conversion apparatus according to any one of (1) to (4), wherein switching is performed between whether a part of the image signal is simultaneously input to each of the line memory to the fourth line memory.
(6)
In the scan change unit, each of the first memory block and the second memory block has four line memories,
When the scanning method of the display device is a horizontal and vertical division normal method in which the screen of the display device is divided into four small screens in the horizontal and vertical directions, and raster scanning is simultaneously performed on each small screen,
Of the four line memories of either the first memory block or the second memory block, signals held in the first line memory and the third line memory are simultaneously read in the same order. At the same time
The signals held in the first line memory and the third line memory among the four line memories of the other memory block are simultaneously read out in the same order (1) to (5) Resolution converter.
(7)
In the scan change unit, each of the first memory block and the second memory block has four line memories,
The scanning method of the display device divides the screen of the display device into four small screens in the horizontal and vertical directions, and the pixels scanned in each small screen are as if four corners from the center of the screen of the display device. If it is a horizontal and vertical split spring method that is scanned as if springing toward
Of the four line memories of either the first memory block or the second memory block, the signals held in the first line memory and the third line memory are simultaneously transmitted in the reverse order. At the same time as reading
Of the four line memories of the other memory block, the signals held in the first line memory and the third line memory are simultaneously read out in the reverse order (1) to (6) The resolution converter described.
(8)
In the scan change unit, each of the first memory block and the second memory block has four line memories,
When the scanning method of the display device is a horizontal division method in which the screen of the display device is divided into four small screens in the horizontal direction, and raster scanning is performed on each small screen,
Simultaneously reading the signals held in each of the four line memories of the first memory block in the same order;
Thereafter, the signals held in each of the four line memories of the second memory block are simultaneously read out in the same order (1) to (8).
(9)
In the scan change unit, each of the first memory block and the second memory block has four line memories,
When the scanning method of the display device is a single screen method that is scanned without dividing the screen of the display device,
Each of the four line memories of the first memory block and each of the four line memories of the second memory block holds a signal for one pixel,
Simultaneously reading the signals held in each of the four line memories of the first memory block in the same order;
Thereafter, the signals held in each of the four line memories of the second memory block are simultaneously read out in the same order (1) to (8).
(10)
The image processing apparatus further includes a supply unit that extracts a signal corresponding to a pixel of a line corresponding to a pixel that is complemented by the up-conversion unit from the image signal read from the holding unit and supplies the signal to the up-conversion unit. 1) The resolution conversion apparatus according to any one of (9).
(11)
The up-conversion section
The resolution conversion apparatus according to any one of (1) to (10), wherein when the up-conversion process is executed, keystone correction or aspect conversion is further performed.
(12)
The holding unit divides the screen corresponding to the image signal into two small screens for the input image signal, holds the image signal corresponding to each of the divided small screens,
The up-conversion unit performs up-conversion processing that complements pixels in each of the two small screens corresponding to the image signal read from the holding unit,
Scan change part
Of the two small screens subjected to the up-conversion processing, the image signal corresponding to the first small screen is held in a plurality of line memories in the first memory block, and corresponds to the second small screen. Image signals to be stored in a plurality of line memories in the second memory block,
The signals held in the plurality of line memories of the first memory block are read in a first order determined according to the scanning method of the display device connected to the first memory block, and the plurality of second memory blocks A resolution conversion method including a step of reading signals held in the line memories in a second order determined according to a scanning method of the display device.

  100 resolution converter, 110 memory control unit, 120 vertical development unit, 121-1 to 121-4 line memory, 122-1 to 122-4 line memory, 130-1, 130-2 up-conversion unit, 131 up-converter, 132 Input / output compatible coordinate calculation unit, 140 scan change unit, 141 memory block, 141-1 to 141-4 line memory, 142 memory block, 142-1 to 142-4 line memory, 143 memory block, 143-1 to 143 -4 line memory, 144 memory block, 144-1 to 144-4 line memory

Claims (12)

For the input image signal, the screen corresponding to the image signal is divided into two small screens, and a holding unit for holding the image signal corresponding to each of the divided small screens;
An up-conversion unit that performs up-conversion processing for complementing pixels in each of the two small screens corresponding to the image signal read from the holding unit;
Of the two small screens subjected to the up-conversion processing, the image signal corresponding to the first small screen is held in a plurality of line memories in the first memory block, and corresponds to the second small screen. Image signals to be stored in a plurality of line memories in the second memory block,
The signals held in the plurality of line memories of the first memory block are read in a first order determined according to the scanning method of the display device connected to the first memory block, and the plurality of second memory blocks And a scan changing unit that reads out signals held in the line memories in a second order determined according to a scanning method of the display device. The holding part is
When image signals corresponding to each of the small screens are read out,
The resolution conversion apparatus according to claim 1, wherein the order of pixels in the image signal is changed for each of the small screens based on a scanning method of the display device. The holding part is
When the scanning method of the display device is that the screen of the display device is divided into four small screens in the horizontal and vertical directions, and each small screen is scanned simultaneously,
The screen corresponding to the input image signal is divided into a small screen in the upper half of the vertical direction and a small screen in the lower half of the vertical direction, and the image signal corresponding to each of the divided small screens is held. The resolution converter described in 1. The holding part is
When the scanning method of the display device is such that the screen of the display device is divided into four small screens in the horizontal direction and each small screen is scanned simultaneously, or the screen of the display device is divided. If you want to scan without
The screen corresponding to the input image signal is divided into a small screen composed only of odd lines and a small screen composed only of even lines, and image signals corresponding to the divided small screens The resolution conversion apparatus according to claim 1. The scan changing unit
Each of the first memory block and the second memory block has four line memories;
When the first memory block and the second memory block hold an image signal corresponding to each of the two small screens subjected to the up-conversion process,
Depending on the scanning method of the display device, the image signals are sequentially input to the first line memory to the fourth line memory, or the first line memory or the first line memory. The resolution conversion apparatus according to claim 1, wherein whether to input a part of the image signal simultaneously to each of a line memory to a fourth line memory is switched. In the scan change unit, each of the first memory block and the second memory block has four line memories,
When the scanning method of the display device is a horizontal and vertical division normal method in which the screen of the display device is divided into four small screens in the horizontal and vertical directions, and raster scanning is simultaneously performed on each small screen,
Of the four line memories of either the first memory block or the second memory block, signals held in the first line memory and the third line memory are simultaneously read in the same order. At the same time
The resolution conversion apparatus according to claim 1, wherein among the four line memories of the other memory block, signals held in the first line memory and the third line memory are simultaneously read in the same order. In the scan change unit, each of the first memory block and the second memory block has four line memories,
The scanning method of the display device divides the screen of the display device into four small screens in the horizontal and vertical directions, and the pixels scanned in each small screen are as if four corners from the center of the screen of the display device. If it is a horizontal and vertical split spring method that is scanned as if springing toward
Of the four line memories of either the first memory block or the second memory block, the signals held in the first line memory and the third line memory are simultaneously transmitted in the reverse order. At the same time as reading
The resolution conversion apparatus according to claim 1, wherein among the four line memories of the other memory block, signals held in the first line memory and the third line memory are simultaneously read in the reverse order. In the scan change unit, each of the first memory block and the second memory block has four line memories,
When the scanning method of the display device is a horizontal division method in which the screen of the display device is divided into four small screens in the horizontal direction, and raster scanning is performed on each small screen,
Simultaneously reading the signals held in each of the four line memories of the first memory block in the same order;
2. The resolution conversion apparatus according to claim 1, wherein the signals held in each of the four line memories of the second memory block are read simultaneously in the same order. In the scan change unit, each of the first memory block and the second memory block has four line memories,
When the scanning method of the display device is a single screen method that is scanned without dividing the screen of the display device,
Each of the four line memories of the first memory block and each of the four line memories of the second memory block holds a signal for one pixel,
Simultaneously reading the signals held in each of the four line memories of the first memory block in the same order;
2. The resolution conversion apparatus according to claim 1, wherein the signals held in each of the four line memories of the second memory block are read simultaneously in the same order. The apparatus further includes a supply unit that extracts a signal corresponding to a pixel of a line corresponding to a pixel that is complemented by the up-conversion unit from the image signal read from the holding unit and supplies the signal to the up-conversion unit. Item 2. The resolution conversion apparatus according to Item 1. The up-conversion section
The resolution conversion apparatus according to claim 1, wherein trapezoidal correction or aspect conversion is further performed when the up-conversion process is executed. The holding unit divides the screen corresponding to the image signal into two small screens for the input image signal, holds the image signal corresponding to each of the divided small screens,
The up-conversion unit performs up-conversion processing that complements pixels in each of the two small screens corresponding to the image signal read from the holding unit,
Scan change part
Of the two small screens subjected to the up-conversion processing, the image signal corresponding to the first small screen is held in a plurality of line memories in the first memory block, and corresponds to the second small screen. Image signals to be stored in a plurality of line memories in the second memory block,
The signals held in the plurality of line memories of the first memory block are read in a first order determined according to the scanning method of the display device connected to the first memory block, and the plurality of second memory blocks A resolution conversion method including a step of reading signals held in the line memories in a second order determined according to a scanning method of the display device.

Images