JP2000172867A - Animation data generating and transferring control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an animation editing system which can reduce the occupation of a bus and the burden to a CPU caused by the transfer of animation data. SOLUTION: An animation data generating and transferring control system is provided with a CPU 1 which GENERATES coordinate data of apexes in a three-dimensional space, an animation data saving section which saves compressed animation data, and a picture coding and decoding section (CODEC). The system is also provided with an image computing section 4 which generates polygon data based on the coordinate data of apexes in the three-dimensional space sent from the CPU 1 and discriminates whether or not each point in a polygon is displayed, and when the points are not displayed on a screen in the frame containing the polygon, respectively instructs the CPU 1 and picture coding and decoding section not to make the transfer and generation of animation data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image processing system, and more particularly to a technique for controlling generation and transfer of moving image data in a moving image editing system.

[0002]

2. Description of the Related Art FIG. 3 is a diagram showing a configuration of a conventional moving picture editing system. Referring to FIG. 3, the CPU 21 and the CP
A main memory 22 for storing a control program and data of U21, a moving image data storage unit 23 for storing compressed moving image data, an image operation unit 24, a texture mapping and shading unit 25, a CODEC (coder / decoder) 2
6, a memory access unit 27, a frame memory 28, a texture memory 29, and a data transfer bus 30. The memory access unit 27 includes a CPU 1, a texture mapping and shading unit 25, a COD
EC26 frame memory 28 and texture memory 2
9 is controlled.

[0003] The pixel operation unit 24 determines pixel data to be written into the frame memory 28 based on vertex coordinate data in a three-dimensional space transferred from the CPU 21 via the data bus 30.

The texture mapping and shading unit 25 reads, from the texture memory 29, moving image data to be mapped to each pixel based on the pixel data determined by the pixel operation unit 24, and performs a texture mapping process. Here, the texture mapping is a process of attaching a texture corresponding to the size of the polygon to the surface of the polygon in order to make the graphic display more realistic when displaying the polygon. After that, each pixel is subjected to shading processing and written into the frame memory 28.

[0005]

However, the above-mentioned conventional moving image editing system has the following problems.

[0006] The first problem is that moving image data that is not mapped is read from the moving image data storage unit 23.
This means that the processing time of U21 and the texture memory 29 and the data bus 30 are occupied more than necessary.

The second problem is that the CODEC 26 extends data even to unnecessary moving image data (compressed moving image data), so that an unnecessary data expansion time is required in the CODEC 26 and the efficiency is reduced. That's what it means.

Accordingly, the present invention has been made in view of the above-mentioned problems, and a main object of the present invention is to provide a moving picture editing system which reduces the occupation of a bus by transferring moving picture data and the load on a CPU. .

[0009]

According to the present invention, which achieves the above object, a moving picture editing system determines whether or not a polygon is displayed on a screen, generates moving picture data to be mapped to the polygon, and There is provided a means for controlling so as to suppress the transfer.

[0010]

Embodiments of the present invention will be described. The embodiment of the present invention reduces the occupation of the data bus and the load on the CPU by suppressing the generation and transfer of the moving image data mapped to the polygon when the polygon mapping the moving image is not displayed on the screen in a frame. It is intended to reduce it.

In the embodiment of the present invention, referring to FIG. 1, a pixel operation unit (4) stores a pixel memory (8) in a frame memory (8) based on vertex coordinate data in a three-dimensional space sent from a CPU (1). The pixel data to be written is determined.

At this time, in the pixel operation unit (4), the moving image data mapped to the polygon written in the frame memory (8) is transferred from the moving image data storage unit (3) to the texture memory (9), or Control signals (11, 12) are sent to the CPU (1) or the CODEC (encoder / decoder) (6) to generate
For polygons that do not need to be written to the frame memory (8) because they have become shadows or backsides of other polygons, the moving image data mapped to those polygons is
Since there is no need to transfer the data from the moving image data storage unit (3) to the texture memory 9, the control signals (11, 12) are transmitted from the pixel operation unit (4) to the CPU (1) or the CODEC (6).
To control the transfer of moving image data or the generation of moving image data.

As described above, in the embodiment of the present invention, the transfer and generation of the moving image data that does not need to be written to the frame memory (8) are restricted, so that the occupation of the data bus and the load on the CPU are reduced. be able to.

Since the moving image data can be mapped directly from the moving image data storage unit (3), the capacity of the texture memory (9) can be deleted.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration of one embodiment of the present invention. Referring to FIG. 1, in one embodiment of the present invention, the pixel operation unit 4 determines pixel data to be written to the frame memory 8 based on vertex coordinate data in a three-dimensional space sent from the CPU 1.

In the pixel operation unit 4, the moving image data mapped to the polygon written in the frame memory 8 is:
The control signal 11 is transmitted from the moving image data storage unit 3 to the texture memory 9 or generates the moving image data.
12 are sent to the CPU 1 or the CODEC 6, respectively.

On the other hand, for a polygon that does not need to be written to the frame memory 8 because it has become a shadow of another polygon or has become a back surface, moving image data mapped to the polygon is stored in the texture memory storage unit 3 from the texture memory. 9 because there is no need to transfer it to
Control signals 11 and 12 correspond to CPU 1 and CODEC, respectively.
6 and the data bus 1 from the moving image data storage 3
0, and control to suppress generation of moving image data.

FIG. 2 is a flowchart for explaining the operation of one embodiment of the present invention. The operation of the embodiment of the present invention will be described with reference to FIGS.

In FIG. 1, first, the CPU 1 generates vertex data (step S1).

The vertex data generated by the CPU 1 is sent to the pixel operation unit 4, which creates polygon data (step S2) and determines whether or not each point in the polygon is displayed. (Step S3).

When it is determined that the point is displayed, the moving image data is loaded from the moving image data storage unit 3 (step S4), and the texture mapping and shading unit 5 is loaded.
In, mapping and shading of the loaded moving image data are performed, and pixel information is written to the frame memory (step S5).

When it is determined that each point in the polygon is not displayed, the moving image data is not loaded from the moving image data storage unit 5 (step S6).
Generates vertex data for the next frame.

[0023]

As described above, the present invention has the following effects.

The first effect of the present invention is that when a polygon is not displayed on the screen in the pixel operation section, control is performed so as not to generate and transfer moving image data mapped to the polygon. Data bus occupancy and C
This means that the load on the PU can be reduced.

A second effect of the present invention is that since the moving image data can be mapped directly from the moving image data storage unit, the texture memory required for the moving image data can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a flowchart for explaining the operation of one embodiment of the present invention.

FIG. 3 is a diagram showing a configuration of a conventional moving image editing system.

[Explanation of symbols]

 1, 21 CPU 2, 22 Main memory 3, 23 Video data storage 4, 24 Pixel operation unit 5, 25 Texture mapping and shading unit 6, 26 CODEC 7, 27 Memory access unit 8, 28 Frame memory 9, 29 Texture memory 10, 30 Bus for data transfer

Claims (4)

[Claims] Determining whether or not a polygon is displayed on a screen; if the polygon is not displayed on the screen in a certain frame, generating moving image data to be mapped to the polygon;
A moving image editing system comprising means for controlling transfer of moving image data. 2. C for generating vertex coordinate data in a three-dimensional space
PU, a moving image data storage unit that stores compressed moving image data, an encoding / decoding unit, and polygon data are created based on vertex coordinate data in a three-dimensional space sent from the CPU. It is determined whether or not a point is displayed. If the polygon is not displayed on the screen in a certain frame, transfer of moving image data to the CPU and the image encoding / decoding unit is performed, respectively.
And a computing unit for instructing not to generate moving image data. 3. C for generating vertex coordinate data in a three-dimensional space
PU, moving image data storage means for storing compressed moving image data, encoding and decoding means, and polygon data based on vertex coordinate data in a three-dimensional space sent from the CPU via a data bus. A moving image editing apparatus comprising: a mapping unit, which performs mapping and shading processing of moving image data and writes pixel information to a frame memory; and a frame memory and a texture memory. It is determined whether or not each point in the frame is displayed, and the moving image data mapped to the polygon written in the frame memory is transferred from the moving image data storage unit to the texture memory to generate the moving image data. Control signals to the C
PU and an image decoder. On the other hand, for polygons that are not displayed on the screen and are not stored in the frame memory, the moving image data mapped to the polygons are transmitted to the CPU and the image decoding unit, respectively. A moving image editing apparatus comprising: means for transmitting a control signal for instructing not to transfer moving image data from a moving image data storage unit and to generate moving image data. 4. The moving picture editing apparatus according to claim 3, wherein the moving picture data is mapped directly from the moving picture data storage unit.