JP2001075553A - Screen regenerating device and comuter readable recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen regenerating device capable of regenerating screens smoothly at the time of regenerating the screens while changing a regenerating speed. SOLUTION: This screen regenerating device is provided with a generation part 13 generating screen data based on data, a sampling control part 14 which supplies the data obtained by sampling animation data to the generation part 13 and which is capable of freely changing a sampling rate at the time of sampling the animation data, a CRT 17 displaying the picture data generated by the generation part 13 and an input device 18 for instructing the replay of a player or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen reproducing apparatus for generating and displaying a screen based on data such as shape data of an object and operation data of the object, such as a game and an interactive movie.

[0002]

2. Description of the Related Art Conventionally, in a game device for playing a game such as a fighting game, when a player wins a fighting game, after the game is over, an effect of playing back the winning scene at a slow speed has been performed.

[0003] Some interactive movies include:
Some of them generate and reproduce screen data of each scene based on the character's shape data and its motion data, etc.Moreover, when playing back a scene, it is possible for the user to move the camera position. There is something you can do. This is the difference between an interactive movie and a conventional movie.

[0004]

By the way, in the above-mentioned game machine for performing a game such as a fighting game, when a player performs a technique having a high degree of difficulty not only in the last scene when winning but also in the middle of the game. There are many situations that you want to see again, such as when you damage your opponent. However, at the time of replay, it is not necessary to reproduce all of the game content as if the game was actually played. This is because there are situations where it doesn't matter. Therefore, if the effect is such that only the scenes desired to be viewed can be played back in slow motion and the other scenes can be viewed in fast-forward, the interest of the game can be doubled. However, in the conventional apparatus, when changing the reproduction speed, for example, when shifting from the normal reproduction speed to the slow reproduction, the same frame is reproduced by displaying the same frame twice. When fast-forward playback is performed from the normal playback speed, frames are played back with dropped frames. Such a conventional playback method has a problem that the video is not smooth when performing slow playback or fast-forward playback. Further, in the conventional method, when changing the reproduction speed, for example, when changing from fast forward to slow, there is a problem that the movement of the character or the like cannot be displayed smoothly.

[0005] In the case of the interactive movie, there is also a problem that it is not possible to smoothly change the slow reproduction, the fast forward reproduction, and the reproduction speed.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide a screen reproducing apparatus which can smoothly reproduce a screen when reproducing the screen at a different reproduction speed.

[0007]

According to the present invention, there is provided a screen reproducing apparatus for generating and reproducing screen data based on data, wherein the screen reproducing apparatus generates the screen data based on the data. Generating means for performing sampling, animation control means for supplying data obtained by sampling animation data to the generating means, and capable of freely changing a sampling rate at the time of sampling, and screen data generated by the generating means And a display means for displaying.

The computer-readable recording medium according to the present invention provides a generation function of generating screen data based on data, and supplies and acquires data obtained by sampling animation data to the generation function. A program for realizing a computer with a sampling control function capable of freely changing a sampling rate at the time and a function of displaying screen data generated by the generation function on a display means and reproducing a screen is recorded. It was done.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment A game device according to a first embodiment of the present invention will be described below with reference to the drawings. FIG. 1A is a block diagram of a game device according to a first embodiment of the present invention, and FIG.
3 is a functional block diagram of FIG. In the following, a description will be given of a game device that performs a fighting game as an example. As shown in FIG. 1, the game apparatus has a ROM (CD-ROM) 11 storing a game control program, various data, and the like.
A main CPU 10 for controlling the entire game by reading and executing a control program stored in a ROM 11, and a RAM 12 for temporarily storing data and the like.
ROM 11 according to an instruction from main CPU 10.
Alternatively, based on shape data of an object such as a character or motion data (motion data) of the object stored in a RAM 12 (hereinafter, the ROM 11 or the RAM 12 is also simply referred to as a memory), screen data (image data ), A screen processing unit 15 for generating screen data at the time of replay, a VRAM 16 for storing one frame of screen data, a CRT 17 for displaying screen data, and freely moving characters. An input device (control pad) 18 operated by the player to perform various techniques by performing operations and to give instructions such as replays; and an external storage device 19 for storing screen data and the like generated by the drawing processing unit 15. It has. The external storage device 19 is for storing the result of the game even after the power of the game device is turned off. This external storage device 19 can be omitted. In addition, the game device further includes an audio processing unit and a speaker for processing sounds such as sound effects. However, since other components such as the audio processing unit are the same as the conventional ones,
For simplicity, the description is omitted in the present embodiment.

[0010] As shown in FIG. 1B, the drawing processing unit 15 generates screen data based on various data and generates a VR.
The generation unit 13 writes the data to the AM 16, and supplies the data obtained by sampling the animation data, which is the data relating to the changing data including the motion data, according to the instruction from the main CPU 10, to the generation unit 13, and sets the sampling rate at the time of sampling. A sampling control unit 14 that can be freely changed.

The generation unit 13 generates screen data at the time of a game or at the time of replay. At the time of a game, screen data is generated based on data that does not change in shape or the like stored in a memory and animation data such as operation data sent from the sampling control unit 14. The generation timing is 1/60 second. The generated screen data is stored in the VRAM 16, displayed, and reproduced. In addition, various types of data that are the basis of the displayed screen data are stored in the RAM 12. At the time of replay, R
Screen data is generated based on this data stored in the AM 12. As described above, by generating and reproducing the screen data for each scene, the data amount can be significantly reduced as compared with the case where the screen data (image data) of all the scenes are stored and reproduced. .

In accordance with an instruction issued from the main CPU 10 in accordance with the progress of the game, the sampling control unit 14 converts, for example, animation data, out of data for forming a screen, from data stored in the memory.
For example, the data is acquired by sampling motion data such as the motion of a character and the motion of a camera, and
Output to 3. Further, the sampling control section 14 can freely change the sampling timing (sampling rate) at this time.

[Reproduction Speed] The reproduction speed of the present embodiment is:
It is determined by the sampling rate when sampling is performed by the sampling control unit 14 and the rate (timing) when the screen data is generated by the generation unit 13. Hereinafter, the reproduction speed in the present embodiment will be described.

In a game device, usually, screen data of 60 frames is generated and reproduced per second. In the fighting game, the generation unit 13 generates 60 screen data per second for each frame based on data or the like stored in the memory. The generated screen data is written to the VRAM 16 and displayed on the CRT 17. Further, various types of data that are the basis of the displayed screen data are stored in the RAM 12 or the external storage device 19 as necessary.

The sampling rate at which animation data is sampled by the sampling control section 14 is set to 60 frames / sec.
Then, when screen data of 60 frames / sec is generated and reproduced,
The playback speed is normal (hereinafter, playback at this time is referred to as constant speed playback). When the sampling rate at which animation data is sampled by the sampling control unit 14 is changed, the reproduction speed can be changed. For example,
If the data sampled at 30 frames / second in the sampling control unit 14 is generated in the generating unit 13 at 60 frames / second, a screen of 1 second is generated and displayed in 0.5 seconds. Become. On the other hand, if the data sampled at a sampling rate of 120 frames / second by the sampling control unit 14 is generated at a rate of 60 frames / second by the generation unit 13, a screen of 1 second is generated and displayed in 2 seconds. So slow playback.

By the way, in the conventional apparatus, when the rate at which the screen data is generated is switched from 30 frames / second to 120 frames / second (when fast forward is changed to slow),
Since it can be instantaneously switched from 30 frames / second to 120 frames / second, the image loses smoothness. On the other hand, in the present embodiment, the timing at which sampling is performed by the sampling
From 0 second, 1/31 second, 1/32 second, 1/33 second ... 1
/ 120 sec.
A smooth transition from fast forward playback to slow playback can be made. Similarly, a smooth transition from slow reproduction to fast-forward reproduction or from constant velocity reproduction to slow reproduction can be performed. The following equation (1) is used when the sampling control unit 14 determines the sampling time.

NextT = NowT + Δt (1) NextT: Next sampling point in the sampling control unit NowT: Current sampling point in the sampling control unit Δt: Sampling interval The sampling rate is determined based on this formula. When the value of Δt is constant, the reproduction speed is constant.
If the sampling interval Δt is the same as the timing (1/60 second) at which the generation unit 13 generates the screen data, constant speed reproduction is performed. If the timing is longer than this timing, fast-forward reproduction is performed.

On the other hand, the calculation of the sampling time in the sampling control section 14 when the reproduction speed is varied can be expressed by the following equation.

NextT = NowT + Function () (2) NextT: Next sampling point in the sampling control unit NowT: Current sampling point in the sampling control unit Function (): Function for performing speed change Function (2) () Is a function for changing the sampling value in the sampling control unit from the start sampling value to the end sampling value. For example, when changing linearly, Function () is as follows.

Function () = SSV + (SSV−ESV) / (T / GSV) (3) SSV: Start sampling value of sampling control unit ESV: End sampling value of sampling control unit GSV: Timing at generation ( (Timing of writing to VRAM) T: Time for changing sampling value (sec) The GSV of the formula (3) is 1/60 second in the case of a normal game device as described above, but is limited to this value. Not something. Displayed in 1/60 second and 1 in the middle of the game
/ 30 seconds in some cases. For example, in the case of a game device, screen data is generated from object shape data and motion data, but the shape data of a certain character object is large and screen data cannot be generated in 1/60 second. There is. In such a case, when generating the screen data of the character, the screen is displayed with the generation timing at the time of performing the constant speed reproduction being set to 1/30 second.

[Replay] When the player finishes the game and replays the game, it is not necessary to watch the game played over three minutes, for example, over three minutes. In the case of replay, the scene to be viewed is played back in slow motion, and fast forward playback is performed halfway to the scene to be viewed. When performing replay by switching from fast-forward to slow, SSV is fast-forward playback, for example, 1/30 second. ESV is slow playback, so 1/12 second.
0 seconds. T / GSV represents the number of frames required for a time when the sampling value is changed by the sampling control unit 14 (hereinafter, also referred to as a change time). The value obtained by dividing the difference between the start sampling value and the end sampling value of the sampling control unit 14 by the number of frames is defined as Function.

Further, by changing the argument of Function (), the change of the sampling value of the sampling control unit 14 from the start sampling value to the end sampling value is not limited to a straight line connecting the two points. 2
Points can be smoothly connected by trigonometric functions or free curves. FIG. 2 is a diagram illustrating a change in the sampling value from the start sampling value to the end sampling value with respect to the change time. The vertical axis of the figure shows the rate of change of the sampling value of the sampling control unit 14 from the start sampling value to the end sampling value (0 to 0).
1), and the horizontal axis represents the rate of change time (0 to 1). The solid line in the figure shows the case where Function () is the equation (3), and the dotted line shows the case where Function () is a sinusoidal curve.

If it is difficult to express the change of the sampling value from the start sampling value to the end sampling value with respect to the change time using a mathematical expression, the change from the start sampling value to the end sampling value with respect to the change time is determined. This change can be set in any way by having it in the form of a table in advance. FIG. 3 is a diagram illustrating an example of a table used in the present embodiment. FIG. 3 shows a case where the change of the sampling value from the start sampling value to the end sampling value with respect to the change time is linear. The first line of the table in FIG. 3 describes a time (change time) required to change from a start sampling value to a target end sampling value in a ratio of 0 to 1. The second line describes the change of the sampling value from the start sampling value to the end sampling value in the sampling control unit 14 in the same manner from 0 to 1. If the change time is 1 second, the change in the sampling value in the sampling control unit 14 can be obtained using the values in the table of FIG. That is, the sampling value may be changed by 0.01 minutes of the total change from the start sampling value to the end sampling value of the sampling value every 0.01 seconds of the change time. When the change time is other than 1 second, this change can be obtained by calculation based on the table of FIG.
Thus, one table can correspond to a plurality of change times. Further, by changing the values in this table, it is possible to easily find the change from the start sampling value to the end sampling value of the sampling value with respect to the change time, which is difficult to express by a mathematical expression.

The smoothing of the reproduction speed on the time axis is realized by re-determining each data at a new sampling value obtained by the above method in the sampling control unit 14, that is, the sampling rate, and performing the drawing process. Can be.

Here, each data includes parameters representing the position, size, rotation and shape change of the object, the texture of the surface and the inside, and parameters relating to the camera required for the perspective transformation (position, orientation, viewing angle, frame, etc.). Ratio, torsion with respect to camera direction), and parameters representing the depth of field.
Parameters required to express the state of the air in the space (solid textures and depth skew expressing clouds, fog, etc.) and parameters expressing motion of objects and camera parameters (motion blur) And parameters indicating the state of light in the space (attributes of light (color, light amount, attenuation rate of light amount), types (spot, point, parallel light, surface, line, indirect reflection), light amount held in space) Refers to data required for CG image generation, such as other parameters (film flaws, lens flare).

However, for data that does not affect the smoothness, it may be possible to adopt the preceding and succeeding parameters without generating new data. In the case of a game, since how the game proceeds is known in advance, for example, for parameters such as daylight shadows and distant backgrounds, background parameter values may be used. . If the color of the object on a certain screen is red, and if the same color is displayed on the next screen, the data generated last time may be used for the parameters of this part. Many of the above parameters are often fixed, so that the parameters that do not change are not recalculated but the previous ones are used, and only the parameters that change are newly recalculated, thereby speeding up the calculation. be able to.

In order to lighten the processing (1),
By making the value added to NowT in the equation (2) an integer multiple of the timing in the generation unit 13, all the processing for recalculating each data can be omitted.

[Operation of First Embodiment] Next, the operation of the game device according to the present embodiment will be described. FIG. 4 is a diagram showing a schematic processing flow of the entire game. Main CP
U10 starts the progress of the game according to the program stored in the memory, monitors instructions from the player,
A command to generate a sound effect or to cause the drawing processing unit 15 to generate a screen is sent. Upon receiving this instruction, the drawing processing unit 15
First, the screen data of the first frame is generated and displayed on the CRT 17 (step S1). If the game is played at 1/60 second, the data which is the basis of the screen data generated every 1/60 second is stored in the RAM 12 (step S2). In step S3, it is automatically determined and registered for each scene whether or not the scene needs to be reproduced at the time of replay after the game. A detailed description of the processing for automatically determining whether or not the reproduction is necessary during the replay will be described later. In step S4, it is determined whether or not the game has ended.
Return to step 1 and continue the game. That is, 1 in the game
The processing from step S1 to step S4 is repeated for each scene. As a result, the data that is the basis of the screen data displayed according to the progress of the game is stored in the RAM 12. On the other hand, if the game is over, the process moves to step S5. In step S5, it is determined whether or not the player has made a replay request. If there is no replay request, the process is terminated. If there is a replay request, the process proceeds to step S6 to replay the game played by the player based on the data stored in the RAM 12. At this time, slow playback is performed for the scene registered in step S3, that is, a scene that the player wants to see, and fast forward playback is performed for a scene that does not matter. When shifting from slow playback to fast-forward playback or shifting from fast-forward playback to slow playback, control is performed so that the playback speed is gradually changed. Details of this replay processing will be described later.

FIG. 5 is a flow chart of the reproduction scene automatic judgment processing, and is a detailed flow chart of the processing of step S3 shown in FIG. The scene that the player wants to see in the replay of the fighting game is when he or she performs a difficult skill or when he or she damages the opponent. In this embodiment,
These scenes are automatically registered. Note that registering a scene in the following means registering the data that is the source of the screen data for generating the scene. In step S11, it is determined whether or not the player has performed a technique by himself. Whether or not the player has performed a technique can be determined by whether or not a button on the input device 18 has been operated. If the player has issued a technique, the process shifts to step S12 to determine whether or not the technique is a technique having a high degree of difficulty. The difficulty of the technique is stored in the form of a table (or a list structure) in advance by determining which technique is the technique with the highest difficulty. The difficulty is determined with reference to this table, and if the technique issued by the player is a technique with a high degree of difficulty, the process proceeds to step S13, the scene is registered as a playback scene, and the process ends. On the other hand, if the difficulty level of the technique is not high, the process proceeds to step S14, and the damage of the opponent is determined. When the damage is given to the opponent, the hit point is reduced. Therefore, it is determined whether or not the damage of the opponent is large by determining whether or not the hit point is reduced by a technique given by the player by a predetermined value or more. If the hit point has decreased by a specified value or more, the process proceeds to step S13, and the hit point is registered as a reproduction scene. If it is determined in step S14 that the damage to the opponent is not large, the process ends. Note that this automatic reproduction determination processing is not limited to the above method. For example, in the scene to be reproduced, in addition to or in place of the above-described case, the degree of difficulty of the technique put out by the opponent, It is also possible to determine whether or not the received damage has decreased by a specified value or more, and register the damage. Further, when the degree of difficulty of the technique performed by the player is high and the damage to the opponent is large, the scene may be registered. FIG. 6 is a flowchart of the replay processing performed at the request of the player, and is a flowchart showing details of the replay processing in step S6 shown in FIG. First, in step S21, the above-described change time when the reproduction speed is changed, and initial values such as a start sampling value and an end sampling value are set. In step S22, it is determined whether or not the scene to be replayed is a registered scene. Since only one frame is registered for each registered scene, when determining whether a scene is a registered scene,
In addition to the scenes that are actually registered, a scene from a scene that is a predetermined number of frames before the registered scene to a scene that is a predetermined number of frames later than the registered scene is determined to be a registered scene. It is determined in advance how many frames before (how many seconds before) and how many frames after (how many seconds later) are to be treated as a registered scene according to each technique, and stored in a table format. At the time of replay, it is determined whether or not to handle each frame as a registered scene using this table. For example, each scene from 1.5 seconds before to 0.5 seconds after the registered scene is processed as a registered scene. In this case, slow reproduction is performed for two seconds, and a total of 120 frames are processed as registered scenes. If it is determined in step S22 that the scene is not a registered scene, step S25
Then, for example, a reproduction speed of, for example, double speed, which is set in advance in advance, is set. On the other hand, when it is determined in step S22 whether or not the scene is a registered scene, the scene is determined to be a registered scene. In step S23, the sampling rate of the sampling control unit 14 is determined using the above equation (1) or equation (2). Then, control goes to a step S24. Since only the first frame has no previous frame even if it is a registered scene, the sampling rate of the sampling control unit 14 is set to, for example, without using the expressions (1) and (2). 60
Set to be frames / second. In step S24,
It is determined whether or not the playback speed determined in step S23 is different from the current playback speed. If they are the same, step S2
Then, the sampling control unit 14 samples animation data at the same sampling rate as the previous sampling rate to acquire data. However, as described above, the parameters of the previous scene are used for the same parameters as those of the previous scene. Step S27
Then, the generation unit 13 generates screen data such as rendering and drawing based on the animation data supplied from the sampling control unit 14 and the data such as the shape stored in the memory.
7 is displayed. If it is determined in step S24 that the playback speed is different from the current playback speed, the process proceeds to step S25.
Then, the sampling rate determined in Step S23 is set, and Steps S26 and S27 are set.
Is performed in the same manner as described above. In step S28, it is determined whether or not the replay process has been completed. If not, the process returns to step S22, and thereafter, the process returns to step S2 until the replay process is completed.
Steps 2 to S28 are repeated for each screen.

[Effects of the Embodiment] According to the above-described embodiment, when a replay is performed by the game device, a scene to be watched can be quickly forwarded, and only the scene to be watched can be viewed in slow reproduction. The interest of the people will double. Further, since the slow playback and the fast forward playback are performed by changing the sampling rate in the sampling control unit 14, even when performing the slow playback or the fast forward playback during the replay, the image becomes smooth as in the case of performing the constant speed playback.

In the present embodiment, the sampling control unit 1 is capable of freely changing the sampling rate.
By providing 4, the speed of a video image formed by the screens generated by the generation unit 13 at the time of replay can be gradually changed. That is, when the playback speed is changed during replay, for example, when changing from fast-forward to slow, the sampling rate of the sampling control unit 14 can be gradually changed. Therefore, even when the playback speed is changed, the movement of a character or the like becomes smooth. Therefore, it is possible to improve the image quality when the reproduction speed is changed, as compared with a conventional apparatus that does not include the sampling control unit.

Further, according to the present embodiment, by providing the automatic registration means, it is possible to automatically register a scene to be slow-reproduced at the time of a replay. Thus, the playback speed can be gradually changed, so that the operability can be improved as compared with the conventional apparatus.

[Modifications] The present invention is not limited to the above embodiment, and various modifications are possible within the scope of the invention. For example, in the above embodiment, the case where the fighting game is performed has been described. However, the present invention is not limited to the fighting game, and may be a racing game such as a car. In the case of a racing game, a scene that gives the player an exhilarating feeling, such as when his or her own rank rises overtaking an opponent, is defined as a registration scene.

In the above embodiment, the case where the playback speed is changed during replay has been described.
The present invention is not limited to this. Even when the reproduction speed is changed during a game, the reproduction speed can be changed smoothly.

Further, in the above-described embodiment, a case has been described in which only one registered scene is registered as a representative, and a predetermined number of frames before and after the registered scene are reproduced as the registered scene when the registered scene is reproduced. When a scene to be registered is registered, a predetermined number of frames before and after the scene may be registered in advance as a registered scene.

Second Embodiment Next, a screen reproducing apparatus for an interactive movie according to a second embodiment of the present invention will be described with reference to the drawings. Usually, an interactive movie means that the video displayed on the screen is a video (video video) recorded in advance,
This includes an image generated by calculating an image to be displayed from data such as a shape, a texture, a light source, a camera viewpoint, and motion (this type of image is used in recent game machines). However, in the interactive movie of the present embodiment, the latter video will be described. That is, the interactive movie of the present embodiment generates screen data to be displayed from data such as shape, texture, light source, camera viewpoint, motion, and the like. In particular, when the playback speed is changed, the video is smoothly changed. It is something that can be done.

In this embodiment and the first embodiment, each frame to be displayed is not registered as screen data (image data), but is registered as object shape data and its movement data, etc. Accordingly, it is common in that screen data is generated and displayed for each frame by calculation.
This embodiment is different from the first embodiment in the following points. In the first embodiment, the scene to be slow-reproduced at the time of replay is automatically registered and reproduced according to the content of the game. Is stored in a predetermined table format (or list structure) or can be changed according to an instruction from the user. That is, the first embodiment is a game machine, and therefore, the movement of a character or the like displayed according to the operation of the player differs, so that the video differs for each game. On the other hand, since the present embodiment is a movie, the user can select a prepared streak, but the video to be displayed is predetermined.

A block diagram of an interactive movie screen reproducing apparatus according to the second embodiment is the same as that shown in FIG. Therefore, the screen reproduction device of the present embodiment will also be described with reference to FIG. As shown in FIG. 1, the interactive movie screen reproducing apparatus according to the present embodiment includes a ROM (CD-ROM) 11 storing an interactive movie control program and various data, and a control program stored in the ROM 11. A main CPU 10 that performs overall control by reading and executing the data, a RAM 12 that temporarily stores data and the like, and a ROM 11 or a RAM 12 (hereinafter referred to as R
The OM 11 or the RAM 12 is also simply called a memory. ), And a drawing processing unit 15 that generates screen data (image data) of a frame of each scene based on shape data of an object such as a character, motion data of the object, and the like, and stores screen data of one frame. VRAM 16 and CRT 1 for displaying screen data
7, an input device 18 operated by a user to give an instruction for reproduction and the like, and an external storage device 19 for storing data and the like from which the screen data generated by the drawing processing unit 15 is generated. The external storage device 19 is for storing the result of the video even after the power is turned off. This external storage device 19 can be omitted. In addition, the apparatus of the present embodiment further includes an audio processing unit and a speaker for processing audio such as sound effects, but other components such as the audio processing unit are the same as those of the related art. For simplification of the description, they are omitted in the present embodiment.

The drawing processor 15 generates screen data based on various data and writes the screen data to the VRAM 16, and the generator 13 samples data obtained by sampling animation data in accordance with an instruction from the main CPU 10. And a sampling control unit 14 that can supply and freely change the sampling rate at the time of sampling.

The generation unit 13 is based on data that does not change, such as a shape, stored in a memory, and animation data (data on a changeable object) such as operation data sent from the sampling control unit 14. , Generate screen data. The generation timing is 1/60 second. The generated screen data is written to the VRAM 16 and displayed on the CRT 17. When it is necessary to replay the displayed screen data, various data for generating the screen data are stored in the RAM 12. At the time of replay, screen data is generated based on the data stored in the RAM 12. As described above, by generating and reproducing the screen data for each scene, compared with the case where the screen data of all the scenes are stored and reproduced,
The amount of data can be significantly reduced.

The sampling controller 14 has a main CPU
In accordance with an instruction issued from step 10, from data stored in the memory, for example, animation data among data for forming a screen, for example, motion data such as a character motion or a camera motion is acquired to obtain data. Then, it outputs to the generation unit 13. Further, the sampling control section 14 can freely change the sampling timing (sampling rate) at this time.

Since the reproduction speed is the same as that of the first embodiment, a detailed description thereof will be omitted. Also,
In the case of the interactive movie, the processing (steps S1 to S4) for playing the game shown in FIG. 4 of the first embodiment is unnecessary. Also, in the case of interactive movie, whether the part to be played back in slow motion is predetermined or
Alternatively, since it is instructed by the user, unlike the case of the game, the slow reproduction automatic determination processing flow shown in FIG. 5 of the first embodiment is unnecessary.

[Operation of Second Embodiment] In the present embodiment,
The processing procedure for reproducing the video is the same as the processing procedure shown in FIG. Therefore, the reproduction process according to the present embodiment will also be described with reference to FIG. The user operates the input device 1
When the reproduction is instructed via the interface 8, the flow of FIG. 6 is executed. First, in step S21, the initial values such as the change time and the start sampling value and the end sampling value described in the first embodiment are set. In step S22,
It is determined whether the screen to be reproduced changes the reproduction speed like a registered scene, for example, a slow reproduction scene. If it is determined that the playback speed is not to be changed, in step S25, for example, a playback speed that is initially set, for example, a constant speed is set. Note that whether or not the scene is a registered scene may be determined in advance, or may be determined to be a registered scene when there is an instruction from a user.

On the other hand, if it is determined in step S22 whether or not the scene is a registered scene, that is, a registered scene, that is, a scene in which the reproduction speed is to be changed, in step S23, the expression (1) or (1) in the first embodiment is used. The sampling rate in the sampling control unit 14 is determined using the expression 2), and the process proceeds to step S24. In the case of the interactive movie, the method of changing the playback speed is the same as in the case of the game. Therefore, equation (1) of the first embodiment,
(2) can be applied to the second embodiment as it is. It should be noted that only the first frame has no previous frame even in a slow playback scene, so that the sampling control unit 1 does not use the formulas (1) and (2).
For example, the sampling rate at 4 is set to 1/60 seconds. In step S24, it is determined whether or not the playback speed determined in step S23 is different from the current playback speed. If they are the same, the process shifts to step S26 to obtain various data constituting one screen. However, as described in the first embodiment, for the same parameters as in the previous scene,
Use the one from the previous scene. In step S27, a screen such as rendering and drawing is generated and displayed using the obtained data. If it is determined in step S24 that the playback speed is different from the current playback speed, the process proceeds to step S25.
Then, the playback speed determined in step S23 is set, and the processes in steps S26 and S27 are performed.
This is performed in the same manner as described above. In step S28, it is determined whether or not the reproduction process has been completed. If not, the process returns to step S22, and thereafter, from step S22 to step S28 in this flow until the reproduction process ends.
The above process is repeated for each screen.

In order to reduce the processing (1),
By making the value added to NowT in the equation (2) an integral multiple of the generation timing in the generation unit 13, all the processing for re-calculating each data can be omitted.

The sampling rate of the sampling control section 14 is normally 60 frames per second in the case of a game, but this value is
It can be set by the user, and for example, can be set to 1/30 seconds, 1/15 seconds, etc. in addition to 1/60 seconds.

[Effects of the Embodiment] According to the above-described second embodiment, the sampling control unit 14
0, resamples the animation data, acquires new data, and generates
Supply 3 The generation unit 13 includes a sampling control unit 14
Generates screen data based on the newly generated animation data and data such as the shape stored in the memory. When performing constant-speed playback, animation data sampled at 1/60 second is sent to the generation unit 13, and the generation unit 13 generates screen data at 1/60 second, and the generated screen data is displayed on the CRT 17. You. The state where the generation unit 13 generates one screen data in 1/60 second is held,
By changing the sampling rate of the animation data required for the generation by the sampling control unit 14, the speed of the image formed by the screens generated by the generation unit 13 continuously can be changed. That is, 1/60
When the state of sampling in seconds is changed to a sampling rate of 1/30 seconds, a video composed of one screen generated in 1/60 seconds has double the speed of constant speed reproduction and fast forward reproduction. Further, if the sampling is changed to 1/120 second, the reproduction speed is reduced to 1/2 and slow reproduction is performed.

In this embodiment, the sampling controller 14 sets the sampling rate to 1/30 second, 1
By smoothly changing the playback speed to / 31 seconds, 1/32 seconds, and 1/120 seconds, the playback speed can be smoothly shifted from fast-forward playback to slow playback. Similarly, when changing from slow playback to fast-forward playback, constant-speed playback to slow playback, or slow playback to constant-speed playback, a smooth transition can be made. On the other hand, the conventional apparatus does not include the sampling control unit 14 of the present embodiment. Therefore, when performing slow playback or fast-forward playback, and when shifting the playback speed from fast-forward playback to slow playback or the like, It cannot be a smooth transition.

[Modification] The present invention relates to the above-described second embodiment.
The present invention is not limited to the embodiment, and various modifications are possible within the scope of the gist. For example, the second
In the embodiment, the interactive movie data is stored on a CD.
Although the case where the data is recorded in the ROM has been described, the data of the interactive movie may be obtained using the Internet via the communication interface.

[Other Embodiments] Further, the present invention stores a program for realizing the functions of the above-described embodiment in a recording medium, reads out the program stored in the recording medium using a computer, and executes the program. It may be. Recording media include floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, DV
D or the like can be used.

[0051]

As described above, according to the present invention, by providing the sampling control means capable of changing the sampling rate of the data supplied to the generating means, it is possible to display the video when performing the slow reproduction or the fast forward reproduction. When the playback speed is changed from fast-forward to slow playback or from slow to fast-forward playback, for example, when the playback speed is changed from the fast-forward to the slow playback, the sampling rate is gradually changed. Since the speed can be gradually changed, the video at the time of changing the reproduction speed can be made smooth as in the case of the constant speed reproduction, and therefore, a screen which is easy to see and which is easy on the eyes can be displayed.

[Brief description of the drawings]

FIG. 1A is a block diagram of a screen reproducing apparatus according to an embodiment of the present invention, and FIG. 1B is a functional block diagram of a drawing processing unit.

FIG. 2 is a diagram illustrating a change in a sampling value from a start sampling value to an end sampling value with respect to a change time.

FIG. 3 is a diagram illustrating an example of a table used in the embodiment.

FIG. 4 is a diagram showing a schematic processing flow of the whole game.

FIG. 5 is a flowchart of a slow reproduction automatic determination process.

FIG. 6 is a flowchart of a replay process performed by a request of a player.

[Explanation of symbols]

10: CPU, 1: ROM, 12: RAM,
13: generator, 14: sampling controller, 1
5: Drawing processing unit, 16: VRAM, 17: CR
T, 18: input device, 19: external storage device

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 5/00 510 G11B 20/10 321Z G11B 20/10 321 G06F 15/62 340A F-term (Reference) 2C001 AA00 AA03 AA16 BA00 BA02 BA05 BB00 BB04 BB05 BC00 BC10 CB01 CB02 CB04 CC02 5B050 AA08 BA08 BA11 EA24 FA02 5C082 AA06 AA37 BA20 BA27 BA42 BA43 CA76 CB01 DACB MM05 MM10 5D044 AB05 AC07 ACO3 DA13 EB05 FA15

Claims (10)

[Claims] 1. A screen reproducing apparatus for generating and reproducing screen data based on data, comprising: generating means for generating screen data based on data; and supplying data obtained by sampling animation data to the generating means. A screen reproducing apparatus, comprising: sampling control means capable of freely changing a sampling rate at the time of sampling; and display means for displaying screen data generated by the generating means. 2. The screen reproducing apparatus according to claim 1, further comprising storage means for storing data from which the screen data generated by said generating means is based. 3. It is determined whether or not each screen data generated by the generation means is screen data of a frame to be reproduced at the time of replay based on a predetermined condition. 3. The screen reproducing apparatus according to claim 2, further comprising an automatic registration unit for registering that the screen data is screen data of a frame to be reproduced at the time of replay. 4. When changing the playback speed,
4. The apparatus according to claim 1, wherein the sampling control means controls the sampling rate to be gradually changed. 5. The screen reproducing apparatus according to claim 1, wherein screen data for a game is generated. 6. The screen reproducing apparatus is for performing a fighting game, and the predetermined condition is that at least one of a time when a high difficulty technique is performed and a time when a large damage is given to an opponent is performed. 4. The screen reproducing apparatus according to claim 3, wherein the condition is satisfied. 7. The screen reproducing apparatus according to claim 1, wherein the screen data is generated based on data stored in advance. 8. It is determined whether or not each of the screen data generated by the generation unit is screen data of a frame that is registered in advance for slow reproduction or high-speed reproduction. 8. The screen reproducing apparatus according to claim 7, wherein the data is reproduced at a slow speed or at a high speed. 9. A generation function for generating screen data based on data; data obtained by sampling animation data is supplied to the generation function; and a sampling rate for sampling can be freely changed. A computer-readable recording medium storing a program for causing a computer to implement a sampling control function, a function of displaying screen data generated by the generation function on a display unit, and reproducing a screen. 10. The computer readable recording according to claim 9, wherein when changing the reproduction speed, the sampling control function controls to gradually change the sampling rate. Medium.