JPH06324669A - Device and method for composite display control - Google Patents

Abstract

PURPOSE:To attain a composite display of graphics and a video image in real time without decreasing the resolution of the video image and to attain a video window display in an optional shape. CONSTITUTION:Graphic data are sent from a graphic controller 13 to a video window display controller 12 equipped with a video window processor 10 which moves a video window and enlarges and reduces it with magnifications in real time and a video data pixel value recognition part 9 which has a function for recognizing pixel values of the graphics data, i.e., color information. The video data pixel value recognition part 9 outputs the video data when a pixel value of the graphic data is '0' and the graphic data when not, and then a displayed screen is composed of the graphics and video windows. Further, the shape of the video window on the screen is optional according to the shape indicated with pixel values '0' of the graphic data.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite display control device for displaying a video window on a graphics screen, and moving and enlarging or reducing the video window freely. The present invention relates to the composite display control method.

[0002]

2. Description of the Related Art FIG. 8 shows, for example, "a workstation board for displaying a video signal on an X window" (literature,
Nikkei Electronics 1991.6.24 p165-
It is a block diagram which shows the structure of the conventional synthetic | combination display control apparatus based on what was shown in p176). In FIG. 8, reference numeral 1 is a decoder for decoding a video signal of the NTSC system and an A / D converter for converting it to a digital signal (hereinafter referred to as a decoder / A / D converter), and 2 is for expanding or reducing a video window. Sampling logic for sampling, 3 is a raster chip as a data processing means for processing data for real-time video display, 4 is a memory address generator for generating an address to the frame memory, and 5 is for controlling the frame memory. A frame memory controller, 6 is the frame memory for storing video data or graphics data,
Reference numeral 7 is a D / A converter for converting the RGB signal from the frame memory 6 into an analog signal, and 8 is a mask plane memory for separately writing video data.

Next, the operation will be described. Decoder A
The A / D converter 1 performs the sync separation and the separation of the luminance signal and the color signal, and the video signal converted into the RGB signal (color signal) is digitized corresponding to the RGB signal by A / D conversion. Next, data processing such as conversion from serial data to parallel data is performed by the raster chip 3 through the sampling logic 2 that thins out data when changing the video window size. Raster chip 3
The input video data is generated by the frame memory controller 5 according to the memory address generated by the memory address generator 4, and is written in the frame memory 6. The video data written in the frame memory 6 is read out and converted into an analog signal by the D / A converter 7. Further, when the graphics data is written in the frame memory 6, it is directly input to the raster chip 3 and written in the frame memory 6 according to the memory address given by the memory address generator 4.

Here, when synthesizing and displaying graphics and a video image, a mask plane memory 8 for separately writing video data to the frame memory 6 is prepared, and a mask plane of an address to be written from the mask plane memory 8 is prepared. This is realized by a read-modify / write cycle of reading and writing video data to the frame memory 6 only when the value of the mask plane is "1".

[0005]

In the conventional composite display control apparatus, the composite display of graphics and video images is realized by the above method, so that the hardware is increased by the memory for the mask plane. However, there is a problem in that the resolution of video data is reduced due to an increase in the data write time due to the read modify / write cycle, and the application software can be complicated.

The present invention has been made in order to solve the above-mentioned problems, and it is possible to perform composite display of graphics and video images in real time without reducing the resolution of the video image. An object of the present invention is to obtain a composite display control device and a composite display control method for displaying a video window in an arbitrary shape.

[0007]

The composite display control apparatus according to the first aspect of the present invention comprises a video window processor 10 for realizing real time movement of a video window and enlargement / reduction of an arbitrary magnification, and a graphics control apparatus 13. The pixel value (color information) of the video data is set to the pixel value (color information) of the video data, and the pixel value of the video data is determined from the pixel value of the graphics data sent from the graphics control device 13. Thus, the video data pixel value recognition unit 9 is provided for displaying the video window and for making the window shape displayable in an arbitrary shape.

In the composite display control method according to the second aspect of the present invention, the process of determining the pixel value of the graphics data and the pixel value of the video data and the pixel value for the video data are prepared for the color information of the graphics data. The process of setting and the process of assigning a pixel value for video data to the portion to which the pixel value for video data is assigned perform composite display of graphics and video images.

[0009]

In the composite display control device of the first invention,
The video window processor 10 realizes movement of the video window and enlargement or reduction of an arbitrary magnification in real time, and the video data pixel value recognition unit 10 uses the pixel values of the graphics data sent from the graphics control device 13 to generate the video data. The video window is displayed by discriminating the pixel value for the display, and the window shape can be displayed in an arbitrary shape.

In the composite display control method of the second invention, the pixel value of the graphics data and the pixel value of the video data are determined, and the pixel value of the graphics data is prepared and set. To be done. Also,
A pixel value for video data is assigned to a portion to which a pixel value for video data is assigned. By these processes, it is possible to display a composite of graphics and video images.

[0011]

【Example】

Example 1 (corresponding to claims 1 and 2). Embodiment 1 of the present invention will be described below with reference to the drawings. Figure 1
Shows a block diagram showing the configuration of the composite display control device according to the first embodiment. In FIG. 1, the same reference numerals as those in FIG. 8 indicate the same parts. In FIG. 1, reference numeral 12 is a video window display control device for displaying a video window, and in this video window display control device 9, 9 is a graphics control device 13 in which the pixel value of the graphics data is a pixel for video data. A value is set, a video window is displayed by determining the pixel value for video data from the pixel value of the graphics data sent from the graphics control device 13, and the window shape can also be displayed in an arbitrary shape. A video data pixel value recognizing unit (RAMDAC) as video data pixel value recognizing means for performing processing, and if the input graphics data is a video data pixel value, a video window is displayed. Reference numeral 10 is a video window processing means that can reduce the hardware area by realizing the sampling logic 2, the raster chip 3, the address generator 4, and the frame memory controller 5 of FIG. 8 in one LSI. Video window processor. Reference numeral 11 denotes a host communication controller unit that controls communication with the host CPU 14, and has a function of receiving a command indicating the position where the video window is displayed. 1
Reference numeral 3 is a graphics control device for displaying graphics, and 14 is a host CPU for delivering commands to the graphics control device 13 and the video window display control device 12. Here, for display synchronization for graphics and video window composite display, a synchronization signal is sent from the graphics control device 13 to the video window display control device 12, and the display synchronization is performed by the video window processor 10 in the video window display control device 12. It is realized by controlling.

Next, the operation of the first embodiment will be described.
2 shows that the graphics controller 13 of FIG.
It shows a flow of processing when receiving a command for displaying a video window from the PU 14. In FIG. 2, when a command for displaying a video window is first received from the host CPU 14 in FIG. 1, step 15 in FIG.
The steps from A to step 15B start. Step 15B is a step of detecting the information on the position and size of the video window from the host CPU 14 of FIG. 1. In step 15C, the graphics data corresponding to the video window display is converted into the video data inside the graphics controller 13 of FIG. This is a step of rewriting to a pixel value for use. In step 15D, it is judged whether or not a command for changing the video window size and the position of the video window while the video window is being displayed is sent from the host CPU 14 in FIG. 15
Repeat steps to D. In the next step 15E, it is determined whether or not a command for closing the currently displayed video window is sent from the host CPU 14 in FIG. 1, and if not sent, the process returns to step 15C and the next video frame is displayed. The corresponding pixel value for video data is written. If a command to close the video window is sent, the graphics data originally displayed in step 15F is written, and step 15 is executed.
The process returns to A and enters the video window display start waiting state.

Next, FIG. 3 shows a flow of video window display in the video window display control device 12 of FIG. 1. First, according to the video window position / size information received from the host CPU 14 in the video window display control device 12. Steps 16A to 16 in FIG.
The step to B starts. In step 16B,
The frame memory address is generated by the video window processor 10 of FIG. 1 based on the position / size information of the video window. In step 16C, the frame memory address shown in FIG.
The video data is written in the frame memory 6 of. Next, in step 16D, it is judged whether or not the change information of the position and size of the video window has been sent from the host CPU 14 of FIG. 1, and if so, the process returns to step 16A and in accordance with the new frame memory address. If the video data is not written to the frame memory 6 and is not sent, the process returns to step 16C and the video data corresponding to the next frame at the same frame memory address is written to the frame memory 6 of FIG. Here, whether the video window is opened or closed is controlled by the graphics control device 13 in FIG. 1 according to the flow of FIG. 2 depending on whether the video data pixel value is written or not. Video window display controller 1
In 2, it is not necessary to control whether the window is opened or closed.

Next, FIG. 4 shows a video data display method in the video data pixel value recognition section 9 of FIG. For example,
When the graphics control device 13 of FIG. 1 sets the video data pixel value to “0” and the same video data pixel value is set in the video data pixel value recognition unit 9 of FIG. Pixel value of data 17 is "0"
In the case of (pixel a), the video data R18, the video data G19, and the video data B20 are valid, and the analog RG output from the video data pixel value recognition unit 9 in FIG.
The pixel a of the B output 21 corresponds to video data, and the pixel values of the pixel b, the pixel c, and the pixel d of the graphics data 17 are not “0”. Therefore, the analog RGB output 21 of the video data pixel value recognition unit 9 The pixels b, c, and d correspond to graphics data.

Next, FIG. 5 shows a composite display method of graphics and video windows displayed by the video data output method of FIG. Graphics controller 13
The rectangular graphics display data in the frame memory 6 of (FIG. 1) has a format as shown by 22 in FIG.
The pixel value of the portion displaying the video window is "0". On the other hand, the video window display controller 12 (FIG. 1)
The video display data in the frame memory 6 of the
The format is as shown by 3, and video image data is written in the portion displaying the video window. Figure 4
The image output to the screen by the above method is displayed in the form of the graphics and rectangular video window composition 24 of FIG.

Embodiment 2 (corresponding to claims 1 and 2). In the first embodiment, the shape of the video window is limited to the rectangular shape, but in the second embodiment, the video window shown in FIG.
If the shape in which the pixel value “0” of the graphics data is written is circular as shown in the graphics display data 25, the circular video window can be easily displayed as shown in FIG. Can be displayed. Here, in FIG. 6, the same symbols as those in FIG. 5 have the same structure. However, in this case, the rectangular video image data in the video display data 23 of FIG. 5 is a rectangular area of the video data from the circular shape of the display window as shown in the graphics and video window composition 26B (hatched portion) of FIG. The video image will be hidden in the overhanging portion.

Embodiment 3 (corresponding to claims 1 and 2). By the way, although the circular video window is shown in the second embodiment, in the third embodiment, the shape for writing the pixel value “0” is an arbitrary shape as shown by 27 in FIG. 7 as shown in FIG. 7. It goes without saying that the video window to be displayed can also be displayed in an arbitrary shape, as shown at 28 in FIG.

As described above, according to the first, second, and third embodiments, the video data pixel value recognizing unit 9 for recognizing the pixel value of the graphics data is provided, and the video is detected based on the determination by the recognizing unit 9. Since it is configured to display windows, you can easily display video windows on the graphics screen without installing extra memory. Further, by setting the same pixel value for video data in the video data pixel value recognition unit 9 and the graphics control device 13 for recognizing the pixel value of the graphics data, the graphics data and the video data can be displayed in real time. Since the data can be determined, the application software can be simplified.

[0019]

As described above, according to the composite display control apparatus of the first aspect of the invention, the video window processing means for realizing the movement of the video window and the enlargement or reduction of the arbitrary magnification in real time, and the graphics control memory are used for the graphics. The pixel value of the video data is set to the pixel value of the video data, and the video data is displayed by discriminating the pixel value for the video data from the pixel value of the graphics data sent from the graphics controller. Since the window shape is provided with a video data pixel value recognizing means for performing processing for enabling display in an arbitrary shape,
There is an effect that the graphics and the video image can be combined and displayed in real time without reducing the resolution of the video image, and the video window can be displayed in an arbitrary shape. Further, since the video window can be displayed based on the judgment by the pixel value recognition means for video data, it is possible to easily display the video window on the graphics screen without installing an extra memory. To be

According to the composite display control method of the second invention, the process of determining the pixel value of the graphics data and the pixel value of the video data, and the pixel value of the video data are set to the pixel value of the graphics data. By the process of preparing and setting and the process of assigning the pixel value for the video data to the portion to which the pixel value for the video data is assigned, the composite display of the graphics and the video image is performed. It is possible to judge the graphics data and the video data, and it is possible to simplify the application software.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a composite display control device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a process of recognizing a video window in the graphics control device according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing a process of recognizing a video window in the video window display control device according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram of a video data output method using graphics data according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing graphics data and rectangular video window display / synthesis according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram showing display / combination of graphics data and a circular video window according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram showing composite display of graphics data and a video window of an arbitrary shape according to a third embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a conventional composite display control device.

[Explanation of symbols]

1 decoder / A / D converter 2 sampling logic 3 raster chip 4 memory address generator 5 frame memory controller 6 frame memory 7 D / A converter 8 mask plane memory 9 video data pixel value recognition unit (video data pixel Value recognition means) 10 video window processor (video window processing means) 11 host communication control section 12 video image display control device 13 graphics control device 14 host CPU a to d pixels 17 graphics data R18, G19, B20 video data 21 analog RGB output 24 Graphics and rectangular video window synthesis 26A Graphics and circular video window synthesis 28 Graphics and arbitrary shape video window synthesis

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 14, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

In the composite display control method of the second invention, the pixel value of the graphics data and the pixel value of the video data are determined, and the pixel value of the graphics data is prepared and set. To be done. Also,
Video data is assigned to the portion where the pixel value has been assigned for the video data of the graphics data. By these processes, it is possible to display a composite of graphics and video images.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Brief description of the drawing

[Correction method] Change

[Correction content]

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a composite display control device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a process of recognizing a video window in the graphics control device according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing a process of recognizing a video window in the video window display control device according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram of a video data output method using graphics data according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing graphics data and rectangular video window display / synthesis according to the first embodiment of the present invention.

FIG. 6 is an explanatory diagram showing display / combination of graphics data and a circular video window according to a second embodiment of the present invention.

FIG. 7 is an explanatory diagram showing composite display of graphics data and a video window of an arbitrary shape according to a third embodiment of the present invention.

FIG. 8 is a block diagram showing a configuration of a conventional composite display control device.

[Description of Codes] 1 Decoder / A / D converter 2 Sampling logic 3 Raster chip 4 Memory address generator 5 Frame memory controller 6 Frame memory 7 D / A converter 8 Mask plane memory 9 Video data pixel value recognition unit (Video Data Pixel Value Recognition Unit) 10 Video Window Processor (Video Window Processing Unit) 11 Host Communication Control Unit 12 Video Image Display Control Device 13 Graphics Control Device 14 Host CPU a to d Pixels 17 Graphics Data 18, 19, 20 video data 21 analog RGB output 24 graphics and rectangular video window synthesis 26A graphics and circular video window synthesis 28 graphics and arbitrary shape video window synthesis

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (2)

[Claims] 1. A graphics control device for controlling the display of graphics and a video window display control device for controlling the display of a video image as a single window, and combining display of the graphics and the video image. In the composite display control device, the video window processing means for realizing the movement of the video window and the enlargement or reduction of the arbitrary magnification in real time, and the pixel value of the video data is set to the pixel value of the graphics data by the graphics control device. The video window is displayed by discriminating the pixel value for video data from the pixel value of the graphics data sent from the graphics control device, and the window shape can be displayed in an arbitrary shape. Provided with pixel value recognition means for video data A composite display control device characterized by the above. 2. A graphics control device for controlling the display of graphics and a video window display control device for controlling the display of a video image as a single window, and combining display of the graphics and the video image. In the composite display control device, the process of determining the pixel value of the graphics data and the pixel value of the video data, the process of preparing and setting the pixel value of the video data as the pixel value of the graphics data, and the video data And a process of assigning a pixel value for video data to a portion to which a pixel value for video has been assigned, thereby performing a synthetic display of graphics and a video image.