JP5108362B2 - Image control device - Google Patents

Description

  The present invention relates to an image control apparatus that performs on-screen display display.

  There is an image control apparatus capable of an on-screen display (hereinafter referred to as OSD: On Screen Display) that superimposes information such as characters, figures, graphics, etc. on image data displayed on the screen. It is used to display menus, operation guides, or icons indicating the operating state of devices.

  In such a case, the operation guide and the icon indicating the operation state of the device should be arranged at the end of the screen so that it is not difficult to see even if a part of the main image (main image) is missing due to the OSD display. There were many. In addition, menus and the like are often displayed on the entire screen so that characters are easy to see. Such a conventional image control apparatus has an OSD function that makes the entire area of the screen displayable, and there is a problem that the capacity of the image memory (VRAM) of the image control apparatus increases.

Therefore, in order to reduce the capacity of the image memory of the image control apparatus, a method of compressing and saving OSD data such as character data and bitmap data displayed by OSD (see, for example, Patent Documents 1 and 2), A method of saving image data excluding the display area (see, for example, Patent Document 3) has been proposed.
JP 2004-1118018 A JP 2004-317823 A JP-A-2005-192128

  However, in order to reduce the capacity of the image memory, a data compression means is required, or the display visibility and the expression ability may be reduced by reducing the capacity of the image memory.

  The present invention has been made in view of the above-mentioned reasons, and an object of the present invention is to provide an image control apparatus that reduces the capacity of an image memory with a simple configuration and is excellent in display visibility and expression ability. is there.

According to the first aspect of the present invention, there is provided a display unit for displaying input image data, an OSD data storage unit for storing one or more on-screen display data, and a display color scale for each pixel dot constituting the on-screen display screen. An OSD display image data memory that functions as a buffer for constructing a display layer in which the furniture is set, and a pixel dot address and a display color scale when the on-screen display data stored in the OSD data storage unit is written into the OSD display image data memory In accordance with the first memory control unit and the second memory control unit for designating the furniture and the input control command, the on-screen display data necessary for constructing the on-screen display screen is read from the OSD data storage unit, O in the memory control unit or the second memory control unit An OSD control unit for constructing a display layer on the SD display image data memory, and a screen in which the display layer constructed in the OSD display image data memory by the first memory control unit or the second memory control unit is combined and drawn with the main image The first memory control unit has a processable pixel dot address range narrower than that of the second memory control unit, and the processable display color gradation is the second level. The capacity in the OSD display image data memory required for storing the display layer that is set more than the memory control unit and constructed by the first memory control unit is the display layer constructed by the second memory control unit. der below capacity required to store the is, setting of the first memory control unit is capable of processing the display color gradient, using red, green, all combination patterns of blue The second memory control unit can be processed by the display color gradient is characterized red, green, to be set using only one combination pattern of blue.

According to the present invention, when displaying the on-screen display data, the first memory control unit having a narrow display range but a large number of display colors and excellent display capability is usually used to display a wide range. When required, data compression is reduced by using the second memory control unit with a small display color but a wide display range, compared to the case where all on-screen display data is displayed in the entire screen area of the display unit. The capacity of the OSD display image data memory can be reduced without providing means. Furthermore, since it is determined which one of the first and second memory control units is used according to the area and the number of colors necessary to display each on-screen display data, the display area and the number of colors suitable for each data. Is set, and the capacity of the OSD display image data memory is reduced, and the display visibility and expression ability are excellent. Further, the capacity of the OSD display image data memory can be reduced while maintaining display visibility and expression ability.

  According to a second aspect of the present invention, in the first aspect, the pixel dot address range that can be processed by the second memory control unit is three times that of the first memory control unit.

  According to the present invention, the display color gradation that can be processed by the second memory control unit can be expressed by 1/3 of the data of the first memory control unit.

  According to a third aspect of the present invention, in the first or second aspect, the pixel dot address range that can be processed by the second memory control unit is the entire display range of the display unit.

According to the present invention, on-screen display display is possible in the entire screen area of the display unit, so that the degree of freedom of display is improved and the display is easy to see for the user .

According to a fourth aspect of the present invention, there is provided the display unit according to any one of the first to third aspects, the first memory control unit or the second memory control unit having a processable pixel dot address range smaller than the entire display range of the display unit. And display position setting means for setting the position of the on-screen display data displayed on the screen.

  According to the present invention, it is possible to make the on-screen display data easy to see while reducing the degree of interference of the on-screen display data with the main image, and to improve the display capability and the visibility of the user.

According to a fifth aspect of the present invention, there is provided the display unit according to any one of the first to fourth aspects, the first memory control unit or the second memory control unit whose processable pixel dot address range is narrower than the entire display range of the display unit. Display mode setting means capable of switching the on-screen display data displayed on the screen between a horizontal writing display mode and a vertical writing display mode.

  According to the present invention, it is possible to improve the display capability of on-screen display data and the visibility of the user. Furthermore, since switching between the horizontal writing display mode and the vertical writing display mode can be realized by switching the rows and columns, the configuration of the pixel dot address converting means can be simplified, and the pixel dot address can be easily specified at the time of switching.

According to a sixth aspect of the present invention, in the fifth aspect, the position of on-screen display data displayed on the display unit in the horizontal writing display mode is set in units of lines, and the on-screen display mode displayed on the display unit in the vertical writing display mode. A display position setting means for setting the position of the screen display data in units of columns is provided.

  According to the present invention, the position of the on-screen display data displayed on the display unit is arbitrarily set in units of rows and columns, so that the degree of interference of the on-screen display data with the main image is reduced and the on-screen display data is turned on. Screen display data can be easily seen, display capability can be improved, and user visibility can be improved.

A seventh aspect of the present invention is the display device according to the fourth aspect, wherein the display position setting means displays on-screen display data composed of character font data on the display unit for each character group or each character group consisting of a plurality of characters. The position to perform is set.

  According to the present invention, the position of the on-screen display data displayed on the display unit is arbitrarily set for each character group for each character group, thereby reducing the degree of interference with the main image of the on-screen display data, The on-screen display data can be easily viewed, the display capability can be improved, and the visibility of the user can be improved.

According to an eighth aspect of the present invention, in any one of the first to seventh aspects, the apparatus includes priority setting means for setting a display priority of the on-screen display data displayed on the display unit, and the plurality of on-screen display data are overlapped with each other. In the case of displaying on the display unit, on-screen display data having a high priority is arranged in front in the overlapping part.

  According to the present invention, display / non-display of overlapping portions of a plurality of on-screen display data can be switched, and display capability can be improved and user visibility can be improved.

According to a ninth aspect of the present invention, in any one of the first to eighth aspects, the apparatus further comprises transparency setting means for setting the transparency of the on-screen display data displayed on the display unit, and the plurality of on-screen display data are overlapped with each other. In the case of displaying on the display unit, each of the on-screen display data is transparently displayed in accordance with the transparency in the overlapping portion.

  According to the present invention, even in the overlapping portion of a plurality of on-screen display data, a part of the data is not lost and difficult to see, and the display capability and the visibility of the user can be improved.

A tenth aspect of the present invention includes the main image storage unit and the stored main image reproduction unit according to any one of the first to ninth aspects, and the image composition unit includes the reproduced main image and the display. One screen in which layers are combined and drawn is output to a display unit.

  According to the present invention, by displaying the on-screen display data on a part of the fixed image reproduction screen stored in advance, it is possible to improve the display capability and the visibility of the user.

As described above, according to the present invention, it is possible to reduce the capacity of the image memory with a simple configuration and to provide an image control apparatus that is excellent in display visibility and expression ability. Further, the capacity of the OSD display image data memory can be reduced while maintaining display visibility and expression ability.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment)
FIG. 1 shows a block configuration of an image control apparatus, and includes a display control unit 11, an OSD controller 12, a display unit 13, an OSD data storage unit 14, a setting unit 15, a fixed image storage unit 16, and a fixed image. The reproduction unit 17 and the image input changeover switch 18 are included.

  The display control unit 11 includes a CPU, and controls each operation of the OSD controller 12, the fixed image reproduction unit 17, and the image input changeover switch 18.

  The OSD controller 12 includes an OSD control unit 121, a memory control unit 122, an OSD display image data memory 123, an OSD display setting storage unit 124, and an image composition unit 125. The OSD control unit 121 controls the operation of each unit. Yes. The memory control unit 122 includes a first memory control unit 122a and a second memory control unit 122b, and the OSD display image data memory 123 includes a first OSD display image data memory 123a and a second OSD display image data memory. 123b.

  The display unit 13 is a liquid crystal display (LCD), and a control unit for displaying an LCD device is also incorporated.

  The OSD data storage unit 14 includes a flash memory (FROM), and one or a plurality of on-screen display data (hereinafter referred to as OSD data) as image data constituting an on-screen display screen (hereinafter referred to as OSD screen) on the display unit 13. Is remembered. The OSD data includes character font data and graphic data.

  The setting unit 15 includes a display position setting unit 151, a display mode setting unit 152, a priority setting unit 153, and a transparency setting unit 154.

  Hereinafter, the operation of the image control apparatus will be described in detail. First, the display control unit 11 gives an OSD display control signal to the OSD controller 12 by inputting a trigger signal. This trigger signal is generated when a call operation is sent from a doorphone (not shown) when a visitor arrives, when an event is sent when a human body is detected from a monitoring camera (not shown), or when a predetermined time comes from a timer circuit (not shown). For example, a count-up notification to be transmitted, an operation occurrence notification of the liquid crystal touch panel of the display unit 13, and the like.

  The control signal transmitted from the display control unit 11 to the OSD controller 12 specifies the OSD data in the OSD data storage unit 14 corresponding to the type of the trigger signal, and the display position of the OSD data on the display unit 13. Is specified to specify the address of the pixel dot for specifying, and is delivered to the OSD controller 121 of the OSD controller 12.

  The OSD control unit 121 reads designated OSD data from the OSD data storage unit 14 according to the control signal, and causes the memory control unit 122 to construct an OSD display layer on the OSD display image data memory 123.

  The OSD display image data memory 123 constitutes an image memory (VRAM) of the image control device, and the first and second OSD display image data memories 123a and 123b display colors on each pixel dot constituting the OSD screen. It functions as a double buffer that constructs an OSD display layer with a set gradation. OSD data capture, OSD display layer construction, and output are performed in a single OSD display image data memory. The first and second OSD display image data memories 123a and 123b alternately perform one process.

  The memory control unit 122 controls the processing of the OSD display image data memories 123a and 123b, one of the first and second memory control units 122a and 122b, and reads the OSD data read from the OSD data storage unit 14. Are designated in the first and second OSD display image data memories 123a and 123b, the pixel dot address and the display color gradation.

  The pixel dot address range that can be processed by the first and second memory control units 122a and 122b is narrower in the first memory control unit 122a than in the second memory control unit 122b. The display memory gradation level that can be processed by the control units 122a and 122b is larger in the first memory control unit 122a than in the second memory control unit 122b.

  Specifically, the pixel dot address range that can be processed by the first memory control unit 122a is 1/3 of the entire screen area of the display unit 13, and the pixel dot address that can be processed by the second memory control unit 122b. The range is set in the entire screen area of the display unit 13. The display color gradation that can be processed by the first memory control unit 122a is set to a total of 8 combination patterns using red (R), green (G), and blue (B) one bit at a time. The color gradation of the display color that can be processed by the second memory control unit 122b is 1 bit for only one of the combination patterns of red (R), green (G), and blue (B). (For example, any one of red (R), green (G), and blue (B) may be used). That is, as shown in FIG. 2A, the first memory control unit 122a includes an OSD surface Mr composed of red (R), an OSD surface Mg composed of green (G), and a blue (b). Although the OSD screen of 8 colors can be configured using the OSD surface Mb, the display area is narrow. On the other hand, as shown in FIG. 2B, the second memory control unit 122b has a display area of the OSD screen. The OSD screen is composed of one color OSD surface Mo represented by only one pattern among all combination patterns of red (R), green (G), and blue (B). In the above description, each of the display gradation levels of red (R), green (G), and blue (B) is described as 1 bit. However, the display gradation levels of the respective colors are not limited to 1 bit, and moreover, each color. The display gradation levels may be different from each other. Further, the pixel dot address range that can be processed by the second memory control unit 122b may be set to a range narrower than the entire display range of the display unit 13.

  The storage capacity in the first and second OSD display image data memories 123a and 123b required for storing the OSD display layer constructed by the first memory control unit 122a is the second memory control unit 122b. Is set to be less than or equal to the storage capacity required to store the display layer constructed by the above, and when performing display with a large number of colors, the display area is reduced to reduce the necessary capacity in the OSD display image data memory 123. Reduced.

  Which one of the first and second memory control units 122a and 122b is used depends on the type of trigger signal input to the display control unit 11 (that is, the type of event that has occurred), and the OSD control unit 121 If the OSD data designated by the display control unit 11 is data that needs to be displayed using all combination patterns of red (R), green (G), and blue (B), the first memory control unit If the OSD data designated by the display control unit 11 is data that requires a wide display area, the second memory control unit 122b is selected.

  The configuration for switching the processing by the first memory control unit 122a to the processing by the second memory control unit 122b is the configuration of red (R), green (G), and blue (B) built in the OSD display image data memory 123. Each OSD plane Mr, Mg, Mb can be realized with a simple circuit configuration that is reconstructed on one plane, and conversely, the processing by the second memory control unit 122b is switched to the processing by the first memory control unit 122a. Can be realized with a simple circuit configuration in which the display color of the color palette is redefined using all combination patterns of red (R), green (G), and blue (B).

  Then, in response to an instruction from the OSD control unit 121, the image composition unit 125 displays the main image transmitted via the image input changeover switch 18, and the first memory control unit 122a or the second memory control unit 122b performs OSD display. One screen on which the OSD display layer constructed in the image data memory 123 (for example, an OSD screen such as a menu, an operation guide, or an icon indicating an operation state of the device) is combined and drawn is output to the display unit 13. This image composition unit 125 is like a high-speed switch, and selects which one of the main image and the OSD display layer is output to the display unit 13 for each pixel dot.

  This main image is a video signal from a television receiver or a monitoring camera (not shown) when the image input selector switch 18 is switched to one side, and when the image input selector switch 18 is switched to the other side. The fixed image playback unit 17 includes a fixed image that is played back.

  The fixed image reproduction unit 17 reproduces a fixed image such as a JPEG image stored in the fixed image storage unit 16 and transmits it to the image composition unit 125 via the image input changeover switch 18, and displays the OSD on the fixed image. The layers are synthesized and displayed on the display unit 13.

  FIGS. 3A and 3B respectively show examples in which an OSD display is synthesized and drawn on a fixed image, and FIG. 3A is a menu screen of a door phone system, and a JPEG image on which various setting buttons B1 are arranged. Then, a fixed image is formed, and a trigger signal corresponding to the operation of the setting button B1 is transmitted to the display control unit 11. The display control unit 11 transmits an OSD display control signal corresponding to the trigger signal to the OSD controller 12, and the OSD controller 12 displays the OSD data A1 corresponding to the operation of the setting button B1 on the fixed image.

  Further, when the video signal from the monitoring camera (not shown) is stored in the fixed image storage unit 16 together with the time information, and when the monitoring video is reproduced, the display control unit 11 sends the OSD display control signal including the time information to the OSD. As shown in FIG. 3B, the OSD controller 12 displays OSD data A2a (in this case, time display linked to the video signal) and various operation buttons corresponding to the time information. OSD data A2b to be displayed is displayed on the monitoring video.

  When the fixed image storage unit 16 is used, a large-capacity device for image storage has a low unit price per bit. Therefore, even if a fixed image used for the background of menus and operation screens is stored in the fixed image storage unit 16, it is inexpensive. Can be configured. In particular, when a fixed image is stored using a high-efficiency image compression code represented by a JPEG image or an MPEG image, the cost required to store the fixed image can be kept very low. Further, by displaying the OSD data on a part of the fixed image reproduction screen stored in advance, it is possible to improve the display capability and the visibility of the user.

  Since the image control apparatus configured as described above is intended to display the main image, in order to reduce the degree of interference with the main image as much as possible, the display range of OSD data is usually narrow but the number of display colors is small. In many cases, the first memory control unit 122a having excellent display capability is used. However, when OSD data display in a wide range is required, since characters and graphics of a specific color are often used in general, it is possible to perform a display function sufficiently even if the number of colors is reduced. Therefore, the second memory control unit 122b having a small display color but a wide display range is used. Therefore, the OSD display image data memory is compared with the case where all the OSD data is displayed on the entire screen area of the display unit 13 using all the combination patterns of red (R), green (G), and blue (B). The capacity of 123 can be reduced. Further, since no data compression means is required, the configuration can be simplified.

  Furthermore, since it is determined which one of the first and second memory control units 122a and 122b is used depending on the area and the number of colors necessary for displaying each OSD data, a display area suitable for each OSD data, The number of colors is set, and the capacity of the OSD display image data memory 123 is reduced, and the display visibility and expression ability are excellent.

  Next, the setting unit 15 operates the display position setting unit 151 to change the pixel dot address range that can be processed by the first memory control unit 122a, whereby the position of the OSD data displayed on the display unit 13 is changed. Can be set arbitrarily. Further, by operating the display mode setting unit 152, the OSD data A3 displayed on the display unit 13 is displayed in the horizontal writing display mode (display in units of lines) shown in FIG. 4A and in FIG. 4B. It can be switched to either vertical writing display mode (display in column units). Since the switching between the horizontal writing display mode and the vertical writing display mode can be realized by switching the rows and columns, the configuration of the pixel dot address conversion means can be simplified, and the designation of the pixel dot address at the time of switching becomes easy.

  Further, by operating the display position setting unit 151, the display position of the OSD data in the horizontal writing mode can be changed in units of lines in the vertical direction. As shown in FIG. The data A51, A52, and A53 can be divided and arranged in units of lines, and the display position of the OSD data in the vertical writing mode can be changed in units of columns in the horizontal direction, as shown in FIG. One OSD data can be divided into OSD data A61, A62, and A63 in units of columns.

  Further, when the OSD data is character font data, by operating the display position setting unit 151, as shown in FIG. 6A, one OSD data composed of character font data is composed of one or more characters. OSD data A71, A72, A73,. . . . . . The display position on the display unit 13 can be arbitrarily set for each group for each character group. As shown in FIG. 6B, one OSD data composed of character font data is converted into character-unit OSD data A81, A82, A83,. . . . . . The display position on the display unit 13 can be arbitrarily set in character units.

  The operations by the display position setting unit 151 and the display mode setting unit 152 are performed on the OSD data displayed on the display unit 13 by the first memory control unit 122a having a small display area. When the pixel dot address range that can be processed by the second memory control unit 122b is narrower than the entire display range of the display unit 13, the same applies to the OSD data displayed on the display unit 13 by the second memory control unit 122b. Can be done.

  As described above, the position of the OSD data displayed on the display unit 13 is arbitrarily set in units of lines, columns, character groups, and characters by operations by the display position setting unit 151 and the display mode setting unit 152. Further, by switching between horizontal writing and vertical writing of the OSD data, it is possible to make the OSD data easy to see while reducing the degree of interference of the OSD data with the main image, and to improve the display capability and the visibility of the user.

  For example, as shown in FIG. 7, by operating the display position setting unit 151, an area designation frame L that exists in a grid pattern on the display unit 13 is designated, and the display position of the OSD data is designated as the designated area designation. It can be set within the frame (hatched area C in FIG. 7), and the degree of interference of the OSD data with the main image (in this case, the imaged person H) is reduced.

  Also, the setting unit 15 operates the priority setting unit 153 to set the priority of each OSD data stored in the OSD data storage unit 14. When the OSD control unit 121 displays a plurality of OSD data on the display unit 13 so as to overlap each other, the OSD data with the set high priority is arranged and displayed in the overlapped part. That is, as shown in FIG. 8, when high priority is set in the order of A110, A120, and A130 for the three OSD data A110, A120, and A130, the display unit 13 displays A110, A120, The OSD data A110 is located at the forefront, the OSD data A120 is located at the rear surface, and the OSD data A130 is located at the rearmost surface in the overlapped portion. The OSD data with higher priority is easier to see. Become. Therefore, it is possible to switch between display and non-display of overlapping portions of a plurality of OSD data, and it is possible to improve display capability and user visibility.

  The setting unit 15 operates the transparency setting unit 154 to set the transparency of each OSD data stored in the OSD data storage unit 14. When the OSD control unit 121 displays a plurality of OSD data on the display unit 13 so as to overlap each other, the OSD data having a higher set transparency in the overlapping portion has higher transparency to the rear surface. That is, as shown in FIG. 9, when a certain transparency is set for each of the three OSD data A210, A220, and A230, each OSD data is overlapped with the OSD data A210, A220, and A230 on the display unit 13. The rear OSD data is also displayed transparently. Therefore, even in the overlapping part of a plurality of OSD data, a part of the OSD data is not lost and difficult to see, and the display capability and the visibility of the user can be improved.

  Each setting content by the setting unit 15 is stored in the OSD display setting storage unit 124, and the setting content for each OSD data is stored. The OSD control unit 121 refers to the OSD display setting storage unit 124, and stores the setting content. Process.

It is a figure which shows the structure of the image control apparatus of embodiment. (A) is a figure which shows the screen structure by a 1st memory control part, (b) is a figure which shows the screen structure by a 2nd memory control part. (A) (b) It is a figure which shows an OSD display screen. (A) is a screen of horizontal writing display mode, (b) is a figure which shows the screen of vertical writing display mode. (A) is a screen in which the position is set in units of rows, and (b) is a diagram showing a screen in which the position is set in units of columns. (A) is a diagram showing a screen on which the position is set in units of characters, and (b) is a diagram showing a screen on which the position is set in units of characters. It is a figure which shows the screen which performed the position setting of OSD data. It is a figure which shows the screen which set the priority to OSD data. It is a figure which shows the screen which set the transparency to OSD data.

DESCRIPTION OF SYMBOLS 11 Display control part 12 OSD controller 121 OSD control part 122 Memory control part 122a 1st memory control part 122b 2nd memory control part 123 OSD display image data memory 124 OSD display setting memory | storage part 125 Image composition part 13 Display part 14 OSD Data storage unit

Claims (10)

A display for displaying the input image data;
An OSD data storage unit for storing one or more on-screen display data;
An OSD display image data memory functioning as a buffer for constructing a display layer in which a display color gradation is set for each pixel dot constituting the on-screen display screen;
A first memory control unit and a second memory control unit for designating a pixel dot address and a display color gradation when writing on-screen display data stored in the OSD data storage unit to the OSD display image data memory;
According to the input control command, on-screen display data necessary for on-screen display screen construction is read from the OSD data storage unit and displayed on the OSD display image data memory in the first memory control unit or the second memory control unit. An OSD controller that builds the layer;
An image compositing unit that outputs, to the display unit, one screen in which the display layer constructed in the OSD display image data memory by the first memory control unit or the second memory control unit is combined with the main image;
The first memory control unit has a processable pixel dot address range narrower than that of the second memory control unit, and a display color gradation that can be processed is set to be larger than that of the second memory control unit. capacity in the OSD display image data memory required for storing display layer constructed by the control unit state, and are less capacity required to store the display layer which is constructed by the second memory controller,
The display color gradation that can be processed by the first memory control unit is set using all combination patterns of red, green, and blue, and the display color gradation that can be processed by the second memory control unit is red, An image control apparatus that is set using only one combination pattern of green and blue .   2. The image control apparatus according to claim 1, wherein a pixel dot address range that can be processed by the second memory control unit is three times that of the first memory control unit.   3. The image control apparatus according to claim 1, wherein the pixel dot address range that can be processed by the second memory control unit is the entire display range of the display unit. Display position setting for setting the position of on-screen display data displayed on the display unit by the first memory control unit or the second memory control unit whose processable pixel dot address range is narrower than the entire display range of the display unit The image control apparatus according to claim 1, further comprising a unit. The on-screen display data displayed on the display unit by the first memory control unit or the second memory control unit whose processable pixel dot address range is narrower than the entire display range of the display unit is displayed in the horizontal writing mode and the vertical writing mode. 5. The image control apparatus according to claim 1, further comprising display mode setting means capable of switching to a display mode. Display for setting the position of on-screen display data displayed on the display unit in the horizontal writing display mode in units of rows and setting the position of the on-screen display data displayed on the display unit in the vertical writing display mode in units of columns 6. The image control apparatus according to claim 5, further comprising position setting means. The display position setting means sets a position for displaying on-screen display data composed of character font data on the display unit for each character group or each character group composed of a plurality of characters. 4. The image control apparatus according to 4. Priority setting means for setting the display priority of the on-screen display data displayed on the display unit, and when a plurality of on-screen display data are displayed on the display unit so as to overlap each other, 8. The image control apparatus according to claim 1, wherein high on-screen display data is arranged in front. In the case where a transparency setting means for setting the transparency of the on-screen display data displayed on the display unit is provided and a plurality of on-screen display data are displayed on the display unit so as to overlap with each other, the overlapping part depends on the transparency. The image control apparatus according to claim 1, wherein each on-screen display data is transparently displayed. A main image storage unit; and a stored main image reproduction unit, wherein the image composition unit outputs to the display unit one screen in which the reproduced main image and the display layer are synthesized and drawn. The image control device according to claim 1, wherein the image control device is a device.

Images