JPH06110648A - Multimedia information processor - Google Patents

Abstract

PURPOSE:To improve efficiency for transferring animation data from an animation data source unit to a frame buffer through a bus. CONSTITUTION:A window identification number register 23 stores the identification numbers of the windows of animation image data previously decided corresponding to the animation data source unit 20. A register 25 stores the identification numbers of windows sent from a main processor 21. A write data control circuit 26 outputs '1' when the contents of the window identification number register 23 and the register 25 are equal, and output '0' in the other case, A video screen display position information plane memory 22 is provided with the picture element capacity in the same size as a display 1 and writes the output data of the control circuit 26 with a pixel coordinate sent from the processor as a data write address. The animation data of the pixel coordinate, for which the value of this plane memory is '1', are transferred from an animation image data source 4 to a frame buffer 2 through the bus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multimedia information processing apparatus having a video screen display function, and more particularly to a control system for transferring moving picture data of a plurality of video screens to a frame buffer.

[0002]

2. Description of the Related Art A conventional general multimedia information processing apparatus, as shown in FIG.
6 is connected to the frame buffer 2 by the moving image data bus 3 and is displayed on the display 1.
In the multi-window environment shown in FIG. 4B, when the three video screens 11, 12, and 13 displayed by the three moving image data sources 4, 5, and 6 are displayed in an overlapping manner, the video screen 1
1 overlap portion 14 and video screen 12 overlap portion 15
Data is sent to the frame buffer 2 through the moving picture data bus 3 like other data.
It is unnecessary data that is not displayed at 0. Therefore, in this method, when the number of video screens to be displayed simultaneously is increased, the overlapping portion of the video screens is increased and unnecessary data is transferred to the frame buffer by the video data bus 2 of the necessary data displayed on the display. There was a problem that could prevent.

In order to solve the above problems, another conventional multimedia information processing apparatus has a frame buffer 51 for each video screen as shown in FIG. 5, and a moving picture data switching circuit 52 and a moving picture data switching control section. 53, and each frame buffer 51 has video data sources 4, 5,
6 is connected, and the moving picture data sent from the moving picture data sources 4, 5, 6 is written. The moving picture data output from the frame buffer 51 is moving picture data switching circuit 52.
Is selected according to the control output of the moving image data switching control unit 53 and displayed on the display 54. Also, when displaying a plurality of video screens on the display 12, the moving image data switching circuit 52 receives the overlapping information of the video screens from the moving image data switching control unit 53 and controls the overlapping of the screens according to the information.

[0004]

In the conventional multimedia information processing apparatus described later, the moving picture data switching circuit 52 is used.
However, there is a drawback that it is difficult to expand by increasing the number of video screens that can be displayed at the same time because the number of inputs of is the upper limit of the number of video screens that can be displayed at one time. The above-described conventional method using the moving picture data bus 3 can easily increase the number of video screens that can be displayed simultaneously by adding the moving picture data sources 4, 5 and 6 connected to the bus. There is a drawback in that the unnecessary data generated in the overlapping portion of the can be prevented from being transferred to the frame buffer of the necessary data to be displayed on the display, and the number of video screens that can be displayed at one time is limited.

[0005]

According to a first aspect of the present invention, a bus for transferring moving picture data to a frame buffer and a plurality of moving picture data connected to the bus and outputting the moving picture data to the frame buffer using the bus. In a multimedia information processing device comprising a source unit and a display display function of the moving picture data transferred to the frame buffer and a processor connected to the bus and controlling the whole, the moving picture data source unit corresponds to the moving picture data source unit. Of the moving picture data source, a first register for storing a predetermined window identification number of the moving picture data corresponding to the moving picture data source unit, and a second register for storing the window identification number sent from the processor. Register, and the contents of the first register and the second register are the same. A write data control circuit that outputs "1" to the first register and outputs "0" when the contents of the first register and the second register are not equal, and has the same pixel capacity as the display. A screen display position information plane memory in which the output data of the write data control circuit is written with the pixel coordinates sent from the processor as a data write address, and a moving image of pixel coordinates in which the value of the screen display position information plane memory is "1". It has a transfer means for transferring data from the moving image data source to the frame buffer via the bus.

A second invention is directed to a bus for transferring moving picture data to a frame buffer, a plurality of moving picture data source units connected to the bus for outputting the moving picture data to the frame buffer using the bus, and In a multimedia information processing apparatus including a display display function of the moving picture data transferred to a frame buffer and a processor connected to the bus and controlling the whole, the moving picture data source unit corresponds to the moving picture data source unit. A first register for storing an identification number of a window of the moving image data, which is predetermined for the moving image data source unit, and a second register for storing an identification number of the window sent from the processor, The display image of the window corresponding to the moving image data source unit A third register for storing the ordinate of the upper left corner on the top, a fourth register for storing the abscissa of the upper left corner, a fifth register for storing the ordinate of the lower right corner of the window, and a horizontal side of the lower right corner. When the sixth register for storing coordinates and the contents of the first register and the second register are equal, "1" is output and the contents of the first register and the second register are not equal. "0" is output to the processor and the abscissa of the pixel coordinate sent from the processor is between the value of the fourth register and the value of the sixth register, and the ordinate of the pixel coordinate is the third coordinate. Write control circuit that outputs a write instruction when the write instruction is present between the value of the register and the value of the fifth register, and the processor that receives the write instruction and has the same pixel capacity as the display. Screen display position information plane memory in which the output data of the write control circuit is written with the pixel coordinates sent from the server as the data write address, and the pixel coordinate moving image in which the value of the screen display position information plane memory is "1". It has a transfer means for transferring data from the moving image data source to the frame buffer via the bus.

Further, a third aspect of the present invention includes a bus for transferring moving image data to a frame buffer, a plurality of moving image data source units connected to the bus for outputting the moving image data to the frame buffer using the bus, and In a multimedia information processing apparatus including a display display function of the moving picture data transferred to a frame buffer and a processor connected to the bus and controlling the whole, the moving picture data source unit corresponds to the moving picture data source unit. A first register for storing an identification number of a window of the moving image data, which is predetermined for the moving image data source unit, and a second register for storing an identification number of the window sent from the processor, The display of the window corresponding to the video data source unit A third register for storing the abscissa of the upper left corner on the surface, a fourth register for storing the horizontal length of the window, a fifth register for storing the ordinate of the upper left corner of the window, and the window "1" when the contents of the sixth register storing the vertical length of the first register and the contents of the first register and the second register are equal
Is output and "0" is output when the contents of the first register and the second register are not equal, and the abscissa of the pixel coordinates sent from the processor is the value of the third register and the value of the third register. Between the value of the third register and the value of the fourth register and the ordinate of the pixel coordinates is the value of the fifth register and the value of the fifth register and the sixth register. A write control circuit which outputs a write instruction when the write instruction is present between the pixel and the pixel which has the same pixel capacity as the display and receives the write instruction and is sent from the processor. A screen display position information plane memory in which the output data of the write control circuit is written using coordinates as a data write address, and a pixel value of the screen display position information plane memory is “1”. It characterized by having a video data Le coordinates from the video data source transfer means for transferring to the frame buffer via the bus.

[0008]

According to the bus control system for multimedia information processing apparatus of the present invention, each moving picture data source unit for transferring moving picture data used for displaying a video screen to a frame buffer is provided with information of a video screen area which is not displayed on the display screen. , It is possible to prohibit the transfer of the moving image data in the non-display area, and reduce the data transfer load of the moving image data bus connecting the plurality of moving image data source units and the frame buffer.

The vertical relationship of the windows is registered in the video screen display position information plane of each moving image data source unit in order from the display position information of the window located at the bottom.
When three video screens 11, 12, and 13 are displayed on the display screen 10 shown in FIG. 6A, the video screen display position information plane 60 is displayed in order from the video screen 11 located at the bottom. Register the display position information.
After the display position information 61 of the video screen 11 is registered, the display position information 62 of the video screen 12 is registered, and finally the information 63 of the video screen 13 is registered. In the process of this registration operation, the screen overlapping area 64 is initially displayed on the video screen 11
Display position information is written, but the next video screen 12
When the display position information is registered, the information on the video screen 12 is overwritten, and the video screen 11 cannot be displayed.
Similarly, the overlapping area 65 of the screen is the first video screen 12
The display position information is written, but the information on the video screen 13 is overwritten and the video screen 12 cannot be displayed.
Video screen display information planes 71, 72, 73 in the video data source unit for supplying video data of each video screen
Stores information 74, 75, 76 of the display area of the video screen displayed by each unit. The whole moving picture data source unit transfers the moving picture data of the displayed area to the frame buffer according to the contents of the video screen display position information plane in the unit, and suppresses the transfer of the moving picture data of the non-displayed area. By suppressing the transfer of the non-displayed moving image data to the frame buffer, the data transfer load of the moving image data bus connecting the frame buffer and the plurality of moving image source units can be reduced.

[0010]

The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a multimedia information processing apparatus according to an embodiment of the first invention. Video data source unit 2
0 uses the moving picture data bus 3 and transfers the moving picture data to the frame buffer 2 to display a video screen on the display 1. The number of video screens that can be displayed on the display 1 is the number of moving image data source units 20 connected to the moving image data bus 3.

The video screen displayed by each video data source unit 20 uses a window identification number and is managed by the main processor 21. The main processor 21 uses the moving picture data bus 3 to write the window identification number of the video screen displayed by each unit into the window identification number register 23 of each moving picture data source unit 20.

After setting the identification number of the video screen, the main processor 21 controls the overlapping of the windows including the video screen displayed on the display 1. The main processor 21 is
The display position of each window is registered in the video screen display position information plane in order from the window located at the bottom.
There is a memory 22 for the video screen display position information plane in all the moving picture data source units 20, and when the display position of the window is changed, the main processor 21 causes the video screen display position information planes in all the moving picture data source units 20. -The content of the memory 22 is changed.

When registering the display position information of the window in the video screen display position information plane, the main processor 21
First notifies the whole moving picture data source unit 20 of the identification number of the window to be registered, and then registers the display position of the window in the video screen display position information plane using the pixel coordinates.

On the other hand, the moving picture data source unit 20 of FIG. 1A stores the notified window identification number in the register 2
Store in 5. The comparison circuit 24 compares the identification number stored in the register 25 and the value of the window identification number register 23, and determines the operation mode of the unit in the operation of registering the display position information of the subsequent window. If the comparison result is a match, the write data control circuit 26 sends the registration data in pixel units sent from the data section of the moving picture data bus 3 to the video screen display position information plane memory 22. In the embodiment shown in FIG. 1, the value of the registration data is "1". The video screen display position information plane memory 22 uses the pixel coordinates sent from the address part of the video data bus 3 as the registration data write address, and the registration data “1” sent by the write data control part 26.
Write.

If the comparison results are inconsistent, the write data control circuit 26 inverts the registration data in pixel units sent from the data section of the moving picture data bus 3. The inverted registration data “0” is written in the video screen display position information plane memory 22.

In the moving picture data source unit 20 of FIG. 1B, the comparison circuit 24 compares the window identification number notified by the main processor 21 with the value of the window identification number register 23, and the comparison result is held in the register 28. To do. The operation after the write data control circuit 26 based on the value held by the register 28 is the same as that in FIG.

After registering the display position information of the window, the main processor 21 uses the moving picture data bus 3 for the whole moving picture data source unit 20 to store the moving picture data in the frame buffer 2.
Order to send to. The moving image data source unit 20 transfers the moving image data of the pixel coordinates whose value in the video screen display position information plane memory 22 is “1” from the moving image data source 4 to the frame buffer 2 via the moving image data bus 3.

FIG. 2 is a block diagram of an embodiment of the second invention. Each moving picture data source unit 20 holds the coordinates where the video screen to be displayed is located within the display screen.

The main processor 21 uses the moving picture data bus 3, writes the window identification number of the video screen in the window identification number register 23 in the moving picture data source unit 20, and further registers the video in the registers 31, 32, 33 and 34. Write the coordinates of the screen display screen. Figure 2
In this embodiment, the register 31 stores the upper left abscissa of the video screen, the register 32 stores the upper left ordinate, the register 33 stores the lower right abscissa, and the register 34 stores the lower right ordinate. It is assumed that the upper left corner of the screen is the origin of the coordinates, the abscissa has a larger value as it is located to the right, and the ordinate has a larger value as it is located below.

After setting the identification number of the video screen and the coordinates in the display screen, the main processor 21 controls the overlapping of the windows including the video screen displayed on the same display 1 as in the first embodiment of the present invention. Register the display position of the window in the display position information plane. Main processor 21 when registering window display position information
The operation of is the same as that of the first embodiment of the invention.

On the other hand, the moving picture data source unit 20 compares the values of the register 25 holding the notified window identification number and the window identification number register 23 by the comparison circuit 24, and in the operation of registering the display position information of the subsequent window, Determine the operating mode of the unit. In the window display position information registration operation, the video data bus 3
The comparison circuit 35 compares the pixel coordinates sent from the address section of the register with the values of the registers 31, 32, 33 and 34. In the write control circuit 36, the abscissa of the pixel sent as a result of the comparison is larger than the value of the register 31 and smaller than the value of the register 33, and the ordinate is the register 3.
If it is larger than the value of 2 and smaller than the value of the register 34, that is, if the display information of the pixel in the video screen displayed by the moving image data source unit 20 is registered, it is stored in the video screen display position information plane memory 22. Perform data registration operation. The operation to be performed is the same as that of the first embodiment of the invention. When the coordinates of the pixel for registering data are outside the displayed video screen, the data registration operation to the video screen display position information plane is suppressed, and the data writing to the memory 22 is prohibited.

The operation after registering the window display position information is also the same as that of the first embodiment of the present invention.

FIG. 3 is a block diagram showing an embodiment of the third invention. The moving image data source unit 20 holds the upper left abscissa and ordinate of the video screen to be displayed, and the horizontal and vertical lengths of the screen.

The main processor 21 uses the moving picture data bus 3, writes the window identification number of the video screen in the window identification number register 23 in the moving picture data source unit 20, and further registers the video screen display screen in the registers 31 and 32. Write the internal coordinates. In the embodiment of FIG. 3, the register 31 has an upper left abscissa of the video screen, the register 32 has an upper left ordinate, and the register 41 has a horizontal length.
The length in the vertical direction is stored in the register 42.

After setting the identification number of the video screen, the upper left coordinates of the video screen in the display screen and the length in the vertical and horizontal directions,
The main processor 21 registers the display position of the window in the video screen display position information plane in order to control the overlap of the windows including the video screen displayed on the same display 1 as in the first embodiment of the present invention. The operation of the main processor 21 when registering the display position information of the window is the same as that of the first embodiment of the invention.

On the other hand, the moving picture data source unit 20 compares the values of the register 25 holding the notified window identification number and the window identification number register 23 by the comparison circuit 24, and in the operation of registering the display position information of the subsequent window. Determine the operating mode of the unit. In the window display position information registration operation, the video data bus 3
The comparison circuit 35 compares the pixel coordinates sent from the address section of the register with the values of the registers 31 and 32. Further, the arithmetic unit 43 adds the upper left abscissa value held by the register 31 and the horizontal length value held by the register 41, and the upper left ordinate value held by the register 32 and the register 42 The held vertical length value is added, and the abscissa and ordinate at the lower right of the video screen are output. The comparison result is compared by the comparison circuit 35, and it is determined whether the coordinates of the pixel for registering the display position information are located within the video screen. The subsequent operations after the data registration in the video screen display position information plane memory 22 are the same as those in the second embodiment of the present invention.

[0027]

As described above, the first aspect of the present invention introduces a video screen display value information plane memory into the moving picture data source unit, and it is located under another screen and the moving picture in the video screen area not displayed on the display. By suppressing output of data to the video data bus,
Reduce the data transfer load on the video data bus. Therefore, by setting the data transfer capacity of the moving picture data bus to a value required to display one display screen, even if the number of moving picture data source units is increased, the number of moving picture data source units of video screens can be displayed simultaneously. It has an effect that it can be displayed.

Further, the second aspect of the present invention introduces a register for holding display start coordinates and end coordinates of the video screen and four comparison circuits to limit the video screen area for displaying the moving picture data source unit. Video screen display position information Only the video screen area to be displayed in the plane memory is mounted in the memory, and the amount of hardware can be reduced.

Further, the third invention introduces an adder for calculating the end coordinates of the video screen display area, and calculates the end coordinates from the display start coordinates and the vertical and horizontal width information of the video screen, thereby the end coordinates by software. The result is that the calculation of the end coordinates is speeded up at the same time that the calculation of the above is unnecessary.

[Brief description of drawings]

FIG. 1A is a block diagram of an embodiment of the first invention. (B) is a block diagram of another embodiment of the first invention.

FIG. 2 is a block diagram of an embodiment of the second invention.

FIG. 3 is a block diagram of an embodiment of the third invention.

FIG. 4A is a block diagram of a conventional multimedia information processing apparatus. (B) is an operation explanatory diagram of a conventional technique.

FIG. 5 is another block diagram of a conventional multimedia information processing apparatus.

FIG. 6 is a diagram illustrating the operation of the present invention.

[Explanation of symbols]

1 Display 2 Frame Buffer 3 Video Data Bus 4, 5, 6 Video Data Source 10 Display Screen 11, 12, 13 Video Screen 14, 15 Video Screen Overlap 20 Video Data Source Unit 21 Main Processor 22 Video Screen Display Position Information Plane memory 23 window identification number register 24 comparison circuit 25 register 26 write data control circuit 27 output buffer 28 register 31, 32, 33, 34 register 35 comparison circuit 36 write control circuit 41, 42 register 43 adder 51 frame buffer 52 video Data switching circuit 53 Video data switching control unit 60 Video screen display position information plane 61 Display position information of video screen 11 62 Display position information of video screen 12 63 Display position of video screen 13 Information 64,65 Overwritten display position information 71,72,73 Video screen display position information plane in the video data source unit 74,75,76 Information of video screen area displayed on display screen

Claims (3)

[Claims] 1. A bus for transferring video data to a frame buffer, a plurality of video data source units connected to the bus for outputting the video data to the frame buffer using the bus, and a video data source unit transferred to the frame buffer. In a multimedia information processing apparatus including a display display function of the moving image data and a processor connected to the bus and controlling the whole, the moving image data source unit includes a moving image data source corresponding to the moving image data source unit,
A first register that stores an identification number of a window of the moving image data that is predetermined corresponding to the moving image data source unit; a second register that stores the identification number of the window sent from the processor; "1" when the contents of one register and the contents of the second register are equal
And a write data control circuit which outputs "0" when the contents of the first register and the second register are not equal, and which has a pixel capacity of the same size as the display and is sent from the processor. The screen display position information plane memory in which the output data of the write data control circuit is written with the coming pixel coordinates as a data write address, and the moving image data of the pixel coordinates in which the value of the screen display position information plane memory is “1” is the moving image. A multimedia information processing apparatus comprising: a transfer unit that transfers from a data source to the frame buffer via the bus. 2. A bus for transferring video data to a frame buffer, a plurality of video data source units connected to the bus for outputting the video data to the frame buffer using the bus, and a video data source unit transferred to the frame buffer. In a multimedia information processing apparatus including a display display function of the moving image data and a processor connected to the bus and controlling the whole, the moving image data source unit includes a moving image data source corresponding to the moving image data source unit,
A first register that stores a window identification number of the movie data that is predetermined for the movie data source unit; a second register that stores a window identification number sent from the processor; A third register storing the ordinate of the upper left corner of the window on the display screen corresponding to the data source unit, a fourth register storing the abscissa of the upper left corner, and the ordinate of the lower right corner of the window. And a sixth register for storing the abscissa of the lower right corner, and "1" is output when the contents of the first register and the second register are equal to each other. When the contents of the second register are not equal, "0" is output and the abscissa of the pixel coordinates sent from the processor is the fourth register. A write control for outputting a write instruction when the ordinate of the pixel coordinate is between the value of the sixth register and the value of the sixth register, and the ordinate of the pixel coordinate is between the value of the third register and the value of the fifth register. A circuit and a screen display position information plane that has the same pixel capacity as that of the display and writes the output data of the write control circuit using the pixel coordinates sent from the processor in response to the write instruction as the data write address. The value of the memory and the screen display position information plane memory is "1".
2. A multimedia information processing apparatus, comprising: transfer means for transferring moving picture data of pixel coordinates from the moving picture data source to the frame buffer via the bus. 3. A bus for transferring video data to a frame buffer and a plurality of video data source units connected to the bus for outputting the video data to the frame buffer using the bus and transferred to the frame buffer. In a multimedia information processing apparatus including a display display function of the moving image data and a processor connected to the bus and controlling the whole, the moving image data source unit includes a moving image data source corresponding to the moving image data source unit,
A first register that stores a window identification number of the movie data that is predetermined for the movie data source unit; a second register that stores a window identification number sent from the processor; A third register for storing the abscissa of the upper left corner of the window on the display screen corresponding to the data source unit, a fourth register for storing the horizontal length of the window, and an ordinate of the upper left corner of the window. And a sixth register for storing the vertical length of the window, and the first register and the second register have the same contents, "1" is output and the first register is output. If the contents of one register and the contents of the second register are not equal, "0" is output and the abscissa of the pixel coordinate sent from the processor. It is between the value of the third register and the value of the third register plus the value of the fourth register, and the ordinate of the pixel coordinates is the value of the fifth register and the value of the fifth register. And a write control circuit that outputs a write instruction when the value is between the value of the register and the value obtained by adding the value of the sixth register, and has a pixel capacity of the same size as the display and receives the write instruction. Screen display position information plane memory in which the output data of the write control circuit is written with the pixel coordinates sent from the processor as the data write address, and the pixel coordinates in which the value of the screen display position information plane memory is "1". Multimedia having transfer means for transferring the moving picture data from the moving picture data source to the frame buffer via the bus Broadcast processing apparatus.