JP2018038064A - Still image information processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technique for performing continuous high-speed switching reproduction of a plurality of still images in a general-purpose information processing device.SOLUTION: A CPU 101 requests a hardware moving image decoder to create a decode instance about a series of still images by issuing an API of Create Decoder S21, reads encoded information as an I frame in order from a still image A from an image information storage part, and issues an API of Submit Frame accompanied the information to the decoder S22. Consequently, the CPU 101 receives an original still image obtained by decoding as RGB data from the decoder S23. Processing of S22 and S23 is repeated about a series of still images to be displayed. When the processing about all of the still images finishes, the CPU 101 issues an API of Destroy Decoder to the decoder and closes a decoding function with a series of I frames as an object S25.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a still image information processing method, for example, a still image information processing method in a general-purpose information processing apparatus such as a personal computer.

  In image processing technology, it is generally required to process a large amount of information at high speed. For example, in the case of a moving image, in the stage where it is encoded and stored, reduction of the capacity according to the ingenuity of the compression technique is more important than high speed, but decoding processing is performed at high speed in the playback scene. Therefore, it is required to reproduce the movie without waiting for processing. Therefore, development of a hardware decoder that performs dedicated compression encoding processing according to the application is being actively promoted. On the other hand, when it comes to still images, the amount of information is much less than that of moving images, so there are almost no scenes that require high-speed processing.

  However, depending on the specific image processing field and application, it may be desired that still images can be processed at high speed. For example, in the field of gaming machines such as pachinko machines, pachislot machines, and game machines, there are scenes in which a number of still images are switched at high speed (including overlapping) and displayed. The faster the speed, the greater the sense of presence and amusement as a game. In this case, the switching speed depends on how fast the decoding process can be performed even if the information amount is a relatively small amount of information such as a still image. Therefore, especially in a gaming machine such as a pachinko machine, even a still image is processed by a dedicated hardware circuit, or each still image is considered as one file of a moving image and is configured as a moving image. A single moving image file of an I frame (Intra-Picture) in the MPEG (Moving Picture Experts Group) standard is processed and processed by a moving image hardware circuit. In addition, for the production, flexible playback control such as reverse playback and double speed playback of moving images is also performed to enhance the feeling of entertainment, but in such control, moving images may be encoded as continuous still images. In such a case, the importance of the processing speed is the same.

JP 2005-12270 A

  By the way, in the above-described game machines such as pachinko machines, especially in the software development process related to the image display, it is desired to proceed with the development while confirming the image display with a general-purpose information processing apparatus such as a general-purpose 3D chip or a so-called personal computer. There are also many requests. However, as will be described in detail below, in a general-purpose information processing apparatus such as a personal computer, it is difficult to confirm and reproduce a display that can be realized in an actual machine as it is because of restrictions on hardware functions.

  FIG. 8 is a block diagram showing a configuration of a general-purpose information processing apparatus represented by a personal computer. In the figure, the apparatus includes a CPU (Central Processing Unit) 101 that controls processing of the entire apparatus, a ROM (Read Only Memory) 102 that stores fixed data such as a basic program, a program to be executed, and its program Random Access Memory (RAM) 103 in which data related to processing is sequentially loaded or deleted and hardware, and hardware that performs decoding processing on the encoded video information and restores the original video A moving image decoder 104, an image information storage unit 105 that stores at least image information to be processed, and a display unit 106 that displays images such as moving images and still images are provided. Specifically, the image information storage unit 105 is an HDD (Hard Disk Drive) or a DVD (Digital Versatile Disk) drive, but may be an external one thereof. The display unit 106 may also be physically configured integrally with the apparatus or may be another independent configuration. Note that a general-purpose information processing apparatus typified by a personal computer typically includes a keyboard, a mouse, and the like, which are omitted here. A functional configuration for connecting to a network such as the Internet is also omitted.

  First, processing when a general moving image is played back by the general-purpose information processing apparatus shown in FIG. 8 will be described. Therefore, the image information storage unit 105 stores in advance compression-coded moving image information. The compression encoding format is typically the MPEG format. Among these, the MPEG4 AVC standard has recently been formulated as a high-performance one. Here, although stored in the image information storage unit 105 in advance, a mode of downloading from a server via a network and playing a stream is also generalized for display.

  Therefore, when the operator of the general-purpose information processing apparatus instructs the apparatus to reproduce any moving image stored in the image information storage unit 105 via a mouse, a keyboard, or the like, the CPU 101 is designated. The moving image is read from the image information storage unit 105 and sequentially given to the hardware moving image decoder 104, and the returned RGB decoded data is given to the display control unit (not shown) in the previous stage of the display unit 106, thereby displaying the moving image. Realized. At this time, the instruction format used by the CPU 101 in the exchange with the hardware moving image decoder 104 is generally called an API (Application Programming Interface). The API between the CPU 101 and the hardware moving picture decoder 104 is individually defined according to each hardware. For example, some commands are specified by API in units of frames, while others can be specified in units of moving image files.

  On the other hand, as described above, the still image information is usually provided for display through a decoding process by software, as represented by still image information compressed and encoded in the JPEG format.

  As described above, even a general-purpose information processing device is generally provided with a hardware moving image decoder. With regard to moving images, a general-purpose information processing device and a specific dedicated machine such as the above-mentioned gaming machine are used. There is no significant difference.

However, in a general-purpose information processing apparatus such as a personal computer, the CPU 101 issues a Create Decoder API to the hardware moving picture decoder 104 in order to decode the moving picture file by the hardware moving picture decoder 104, and also secures memory and processes the driver. In order to create a decode instance, miscellaneous software processing, for example, processing such as an inquiry to an OS (Operating System) is performed, resulting in a delay of several hundred milliseconds. When playing ordinary videos such as home video images, such software processing only delays the start of movie playback by about several hundred milliseconds, and there is no problem with playback. That will be effective with regard to the reality of video playback.
For example, when playing back multiple videos continuously, a general-purpose information processing device must create a decode instance for each video file and make it possible to execute the decoding process. A processing delay of 100 milliseconds occurs for each playback video file, and even if a general-purpose information processing device is used in the development process of a gaming machine or the like, the display realized on the actual machine cannot be confirmed.

  On the other hand, when turning to a still image, a general-purpose information processing device such as a personal computer is provided, as in a dedicated machine such as a gaming machine, high-speed decoding processing is realized by regarding a still image as a moving image. It is possible to conceive of high-speed processing using a hardware video decoder. However, in the general-purpose information processing apparatus that takes a relatively long time to open one moving image as described above, a hardware moving image decoder is used even in a configuration in which one still image is processed as one moving image file. Even if it is used, a process for opening and closing a file is performed for each moving image, that is, each still image, and a decoding instance is created in the general-purpose information processing device each time. Various processes such as processing, which cause a decrease in processing speed, are performed very frequently, and continuous high-speed switching reproduction of a plurality of still images similar to a dedicated machine cannot be realized at all. The dedicated machine realizes the process of switching and playing back a plurality of still images at a high speed for 60 frames per second. In that case, one movie, that is, the time allowed to open each still image is several. This is less than milliseconds, and cannot be realized in the above-mentioned hundreds of milliseconds of a general-purpose information processing apparatus.

  The present invention has been made for the above-described circumstances, and an object of the present invention is to provide a still image information processing method that enables continuous high-speed switching reproduction of a plurality of still images in a general-purpose information processing apparatus. is there.

  Note that Patent Document 1 aims to provide a recording device that can play back still images even in a playback device that does not support playback of still image files (paragraphs [0012] to [0014]. As an implementation means, still image data is encoded as an I frame in MPEG format, embedded in a moving image file and recorded (paragraphs [0015] to [0018], [0030], [0037], [0037], [0037] 0051], FIG. 3 and FIG. 4), reproducing it. As a result, recording and playback of still images are not supported, that is, a recording and playback device for only moving images can handle still images.

  However, in Patent Document 1, there is no concept of continuous high-speed switching reproduction of a plurality of still images. In addition, there is no concept of the problem of processing speed when continuously switching a plurality of still images in a general-purpose information processing apparatus. Therefore, there is no concept of decoding encoded still image information by hardware. There is no concept of frame size.

  In order to achieve the above object, a still picture information processing method according to the present invention provides a hardware moving picture decoder and a software instruction to the hardware moving picture decoder based on a specification of a command for the hardware moving picture decoder. A controller that requests decoding of the encoded video, and as a result, receives the decoded video from the hardware video decoder and processes it, and displays the image by receiving the decoded video from the control unit. A still image information processing method for displaying and processing still images using a general-purpose information processing device including a display unit, and for displaying the resolution of a plurality of still images with different resolutions for which continuous high-speed switching display is performed as dummy data Video file with a single resolution by the allocation process and each of a plurality of still images having the single resolution as an I frame And the actual size information of each still image is stored in the header of the moving image file, and the control unit uses the hardware moving image decoder for decoding the moving image file. A first command for creating a decode instance is issued, and then the control unit gives a second command for decoding in units of moving image files to the hardware decoder. The display unit displays a still image before dummy data allocation processing based on the information stored in the display unit, and the control unit discards the decode instance after decoding of the requested moving image file is completed. The gist is to give a directive.

  At that time, in encoding, a plurality of still images are grouped according to the number of decoding functions that can be simultaneously operated in the hardware moving image decoder and the resolution of each of the plurality of still images, and the resolution for each group. There is a method of encoding as a moving image file in which each of the still images is an I frame.

  Further, in the still image information processing method, as the plurality of still images, those for which continuous high-speed switching display is performed on a gaming machine are used.

  Another method of still image information processing method according to the present invention is to encode a hardware video decoder and a software command to the hardware video decoder based on a command specification for the hardware video decoder. A control unit that requests decoding of a completed video and, as a result, receives and processes the decoded video from a hardware video decoder, and a display that realizes display of an image by receiving the decoded video from the control unit A still image information processing method for displaying and processing a still image using a general-purpose information processing apparatus comprising: a hardware image decoder, wherein the still image is divided into a single resolution based on the resolution of the hardware video decoder; Each of the divided still images is encoded as a moving image file having an I frame, and the header of the moving image file is related to the division. The information is stored, and the control unit issues a first instruction for creating a decode instance to be used for decoding the moving image file to the hardware moving image decoder. A second instruction for decoding is given to the wear decoder in units of moving image files, and the control unit joins the divided still images based on the information related to the division stored in the header or the like. It is displayed on the display unit, and the control unit gives a third instruction to discard the decode instance after the requested moving image file has been decoded.

  In the encoding, it is preferable to obtain a single resolution by applying dummy data to a portion where the ends after division do not match.

  In the encoding, the resolution for dividing the still image is determined according to the number of decoding functions that can be simultaneously operated in the hardware moving picture decoder and the resolution of the decoding function, and the control unit determines a desired resolution. A first command for creating a decode instance for ensuring a decryption function corresponding to is performed.

  Further, in the still image information processing method, as the plurality of still images, those for which continuous high-speed switching display is performed on a gaming machine are used.

  According to the still image information processing method of the present invention, continuous high-speed switching reproduction of a plurality of still images as realized by a dedicated machine such as a gaming machine can be performed in a general-purpose information processing apparatus.

  In particular, each of a plurality of still images with different resolutions is converted into a still image having a single resolution by dummy data allocation processing, which is encoded as an I-frame moving image file in the MPEG standard, and the header of the moving image file The actual size information of each still image is stored in the control unit, and the control unit gives a decoding instruction in units of moving image files to the hardware moving image decoder, and the information stored in the header or the like. Since the still image before dummy data allocation processing is displayed based on this, even in an environment where a low-level API that provides frame data for decoding and the like is not provided, the content remains stationary during decoding. It can be programmed to process the image information without being conscious of it at all.

Of the processing of an embodiment of the still image information processing method of the present invention when the CPU 101 can instruct the hardware moving image decoder 104 to decode in units of frames, when each still image is compression-encoded in advance. It is a figure for demonstrating an encoding process. When the CPU 101 can instruct the hardware video decoder 104 to decode in units of frames, the CPU 101 performs the hardware video decoder 104 during the decoding process in the processing of the still image information processing method of the present invention. It is a figure which shows the procedure of the instruction | indication performed with respect to. Of the processing of the embodiment of the still image information processing method of the present invention when the CPU 101 can instruct the hardware moving image decoder 104 to decode in units of moving images, each still image is pre-compressed and encoded. It is a figure for demonstrating the encoding process at the time. When the CPU 101 can instruct the hardware moving image decoder 104 to decode in units of moving image files, the CPU 101 performs hardware decoding in the decoding processing of the processing of the embodiment of the still image information processing method of the present invention. FIG. 10 is a diagram showing a procedure of instructions given to the decoder 104. It is a figure for demonstrating the case where the size of each still image is equalized and processed. It is a figure for demonstrating the specific example of the allocation at the time of allocating the several still picture of a different size to each decoder, when a some decoder function is securable. It is a figure for demonstrating the other example in the case of processing by aligning the size of each still image. It is a block diagram which shows the structure of the general purpose information processing apparatus represented by the personal computer.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Here, as an example, in the case where four still images (still images A, B, C, D) are continuously switched at high speed and played on a gaming machine such as a pachinko machine, the information is general-purpose information such as a personal computer. A case where reproduction is performed by the processing apparatus will be described. The hardware configuration of the general-purpose information processing apparatus is not different from the conventional one shown in FIG.

  Therefore, the API that the CPU 101 issues to the hardware moving image decoder 104 when the operator instructs the apparatus to display an arbitrary moving image has a difference depending on the type of hardware as described above. However, there are roughly two types: one that gives a decoding instruction to the hardware moving picture decoder 104 in units of one moving picture file and one that gives a decoding instruction in units of frames in a moving picture. In the following, embodiments of the present invention will be described in each case.

a) When the CPU 101 can Instruct Decoding in Frame Units FIG. 1 shows an embodiment of the still image information processing method of the present invention when the CPU 101 can instruct the hardware video decoder 104 to decode in frame units. It is a figure for demonstrating the encoding process at the time of carrying out the compression encoding of each still image beforehand among processes.

  As shown in the figure, in this case, with respect to the encoding process when each still image is compressed and encoded in advance, in this case, each still image is defined by MPEG using a predetermined software tool. And is stored individually in the image information storage unit 105 (step S11). Alternatively, as described above, it may be stored in a server on the network. In other words, as shown in FIG. 1, each still image is encoded corresponding to an I frame defined by MPEG, but they are not combined into one moving image file, but are stored as separate files. .

  FIG. 2 shows a case where the CPU 101 performs hardware decoding in the processing of one embodiment of the still image information processing method of the present invention when the CPU 101 can instruct the hardware video decoder 104 to perform decoding on a frame basis. It is a figure which shows the procedure of the instruction | indication given with respect to the wear video decoder. Basically, the CPU 101 obtains necessary decoded image information by controlling the hardware moving image decoder 104 while issuing necessary APIs. Here, in particular, when the CPU 101 can instruct the hardware moving image decoder 104 to decode in units of frames, by issuing an API for decoding instructions in units of frames from the CPU 101 to the hardware moving image decoder 104. In the decoding process of one moving image file, the process of seeking an I frame can be emulated.

  Specifically, when the operator instructs the continuous high-speed switching reproduction of a still image via a mouse, a keyboard, or the like, or when a program for realizing continuous high-speed switching reproduction of a still image is started, first, the CPU 101 Request the creation of a decode instance for the first series of still images (still images A, B, C, and D in the case shown in the figure) by issuing a Create Decoder API to the hardware video decoder 104 (Step S21).

  Next, in order from the still image A, the CPU 101 reads out the encoded information as the I frame from the image information storage unit 105 and issues an API of Submit Frame with the information to the hardware moving image decoder 104. (Step S22). As a result, the CPU 101 receives the original still image obtained by decoding from the hardware moving image decoder 104 as RGB data (step S23). And the display of the said still image is implement | achieved by sending the obtained data to the display control part provided in the front | former stage of the display part 106 at any time. Then, the processes in steps S22 and S23 are repeated for all of the series of still images to be displayed, in this case, all of the still images A, B, C, and D (step S24).

  In step S24, when the processing is completed for all the series of still images (affirmative determination), the CPU 101 issues a Destroy Decoder API to the hardware moving image decoder 104 to perform a decoding function for a series of I frames. Is closed or discarded (step S25). Next, if there are other series of still images to be continuously displayed (Yes in step S26), the process returns to step S21 and the same processing is repeated.

As described above, the decoding instance creation process is not performed for each still image, and the decoding instance is created for each series of still images to be displayed. Continuous high-speed switching reproduction is possible. In particular, when the CPU 101 can instruct the hardware moving image decoder 104 to decode in units of frames, each still image is individually stored and managed, so that editing such as replacement of still images is easy. There is an advantage of being.
That is, by decoding a still image as an I frame of a moving image and decoding a plurality of still images as a moving image including a plurality of I frames, each moving image file (as an I frame of a still image A to a still image D) Even if it is a general-purpose information processing apparatus without creating a decode instance in the above file), a plurality of still images can be continuously switched at high speed.

b) When the CPU 101 is capable of instructing decoding in units of moving image files FIG. 3 shows the still image information processing method of the present invention when the CPU 101 can instruct the hardware moving image decoder 104 to decode in units of moving image files. It is a figure for demonstrating the encoding process at the time of carrying out the compression encoding of each still image among the processes of one Embodiment.

  As shown in the figure, in this case, for encoding processing when each still image is compressed and encoded in advance, each still image is encoded as an I frame using a predetermined software tool, and The image data composed of the I frame is set as GOP (Group of Picture) data, and is stored in the image information storage unit 105 as one moving image file composed of a plurality of GOP data (step S31). Alternatively, as described above, it may be stored in a server on the network.

  FIG. 4 shows the CPU 101 in the decoding process in the processing of the embodiment of the still image information processing method of the present invention when the CPU 101 can instruct the hardware moving picture decoder 104 to decode in units of moving picture files. FIG. 10 is a diagram showing a procedure of instructions given to the hardware moving image decoder 104. Basically, as in the case of FIG. 2, the CPU 101 obtains necessary decoded image information by controlling the hardware moving image decoder 104 while issuing necessary APIs. Here, in particular, when the CPU 101 can instruct the hardware moving image decoder 104 to decode in units of moving images, a series of still images is handled as a moving image, and the CPU 101 decodes in units of moving images. Processing is performed by issuing an API requesting conversion to the hardware video decoder 104.

  Specifically, when the operator instructs the continuous high-speed switching reproduction of a still image via a mouse, a keyboard, or the like, or when a program for realizing continuous high-speed switching reproduction of a still image is started, first, the CPU 101 For a moving image file in which a series of still images (still images A, B, C, and D) are collected, the hardware moving image decoder 104 is requested to create a decode instance by issuing an API of Create Decoder ( Step S41).

  Next, an encoded moving image file composed of the first series of still images (still images A, B, C, and D in the case shown in the figure) is read from the image information storage unit 105, and the moving image file is designated. An API requesting decoding in units of one moving image file is issued to the hardware moving image decoder 104 (step S42). As a result, the CPU 101 acquires RGB data of moving image data (a plurality of still images A, B, C, and D) obtained by decoding from the hardware moving image decoder 104 (step S43). And the display of the said still image is implement | achieved by sending the obtained data to the display control part provided in the front | former stage of the display part 106 at any time.

  When the decoding process of one moving image file is completed, the CPU 101 issues an API of Destroy Decoder to the hardware moving image decoder 104 to close or discard the decoding function (step S44).

  Thereafter, if there is another moving image file to be displayed (affirmative determination in step S45), the process returns to step S41 again, and if there is no other moving image file to be displayed (determination is negative in step S45), the process is ended.

  As described above, the hardware moving picture decoder 104 performs a process of sequentially decoding each successive I frame, which is the same process as a sequential seek of only an I frame in a general fast-forward display process.

  As described above, since a plurality of still images are decoded as a single moving image file, a decoding instance is created in a general-purpose information processing device for each moving image file, and a decoding instance is created in processing for each still image. Absent. In other words, since a series of still images to be displayed is regarded as one moving image file and a decode instance is created for each moving image file, even a general-purpose information processing device can switch multiple still images continuously at high speed. Playback is possible. In particular, when the CPU 101 can instruct the hardware moving image decoder 104 to decode in units of moving images, the encoding is completely configured as a moving image at the time of encoding. In this case, the processing can be performed without any consciousness that the contents are still image information, or can be programmed.

  By the way, in the above-described embodiment, the CPU 101 of the general-purpose information processing apparatus is a general-purpose information processing apparatus regardless of whether the CPU 101 instructs the hardware decoder 104 to decode in units of frames or in units of video files. By reducing the number of decode instances created in, the delay in the decoding process is reduced, and multiple still images are played back at high speed continuously in the same way as a dedicated machine. Therefore, the size of each still image is required to be the same. That is, on the assumption that all the still images A, B, C, and D have the same size, a decode instance for securing a memory area and processing for each driver is created, and the decoding process is performed on the instance. Done. Therefore, if the still images A, B, C, and D have different sizes, a desired display result cannot be obtained even if each still image is regarded as a moving image and reproduced. In particular, a plurality of still images displayed on a gaming machine such as a pachinko machine are often configured with completely different sizes (resolutions). On the other hand, with a hardware video decoder, Since the sizes are not usually different and the decoding process is performed on a single decoding instance, the decoding process can be performed only with the same size for each frame. In such a case, it is necessary to arrange the sizes in advance at the encoding stage. Hereinafter, a method for processing each still image with the same size will be described.

  FIG. 5 is a diagram for explaining a case where processing is performed with the still images having the same size. When there are still images E, F, G, and H of various sizes as shown in the figure, the minimum capacity decoder that covers all of them is a 512 × 512 pixel capacity decoder. When aligning the size of each of the still images E, F, G, and H to 512 × 512, dummy data is applied (padded) to the missing portions. Then, after performing such allocation processing, encoding processing is performed. In this way, image data of a desired size can be decoded in an environment where a single decode instance is created. If the actual size information is stored in the header, for example, the original still image can be reliably reproduced at the time of display after decoding.

  In this connection, the hardware video decoding function of the above-mentioned CPU is usually divided into a plurality of decoding functions so that a plurality of decoders can be secured and operated simultaneously. It is. For example, if 10 decoders are secured by design and played back simultaneously, 7 of them will be used for decoding a normal video, and the remaining 3 will be still images that look like the above video. It is for decoding. At this time, with regard to the three decoders, decoders of three types of resolutions may be configured according to instructions from the CPU 101 in accordance with the assumed size variation and dispersion of each still image. FIG. 6 is a diagram for explaining the concept. As shown in the figure, when still images P to U are assumed, it is possible to include the capacity of each still image, assuming that each decoder of 256 × 256, 512 × 512, 1024 × 1024 pixels is configured. If the allocation is made to the decoder with the minimum resolution, the allocation becomes efficient.

  In the above description based on FIG. 5 and FIG. 6, as an index for aligning the sizes, the sizes are aligned in terms of preparing a minimum resolution decoder that covers all of the still images. It is also possible to expand the concept further, and conversely, each still image is divided by a decoder having a resolution smaller than those to make the sizes uniform. FIG. 7 is a diagram for explaining such a case. In the figure, the still image V is divided by 12 decoders each having 512 × 512 pixels, and in this case as well, the allocation process is performed for a portion where the ends do not coincide, that is, in this case, 6 data. Is performed and encoding is performed. In this case, information related to the division may be stored in the previous header information. In decoding, the original still image may be reproduced by sequentially supplying the data to the decoder and decoding them, and then joining them based on the division information.

  From the above, for example, when only one type of resolution decoder can be secured by restricting the function of the hardware video decoder and creating a decode instance only once, still images of various sizes that can be accommodated and cannot be accommodated. Even if an image exists, it can be dealt with.

  As described above, according to one embodiment of the still image information processing method of the present invention, even in a general-purpose information processing apparatus represented by a personal computer, a plurality of still images such as those realized by a gaming machine such as a pachinko machine are used. Continuous high-speed switching playback of images can be realized.

  The still image information processing method of the present invention can be used when, for example, display processing realized in a gaming machine such as a pachinko machine is reproduced in advance by a general-purpose information processing device such as a personal computer in the development process.

101 CPU
102 ROM
103 RAM
104 Hardware video decoder 105 Image information storage unit 106 Display unit

Claims (7)

A hardware video decoder;
Based on the specifications of the instruction for the hardware video decoder, the software instruction is given to the hardware video decoder to request decoding of the encoded video, and as a result, the decoded video is transmitted from the hardware video decoder. A control unit for receiving and processing;
A display unit capable of displaying an image by receiving the decoded video from the control unit;
A still image information processing method for displaying a still image using a general-purpose information processing apparatus equipped with
As a moving image file in which the resolution of a plurality of still images with different resolutions for continuous high-speed switching display is made a single resolution by the dummy data allocation process , and each of the plurality of still images having the single resolution is an I frame. Encode and store the actual size information of each still image in the header of the video file
The control unit issues a first instruction for creating a decode instance used for decoding the moving image file to the hardware moving image decoder , and then the control unit transfers a moving image to the hardware decoder. Give a second command for decryption on a file basis,
The control unit displays a still image before the dummy data allocation process on the display unit based on the information stored in the header or the like,
The control unit gives a third instruction to discard the decoded instance after the requested video file has been decoded . In the encoding, the plurality of still images are grouped according to the number of decoding functions that can be operated simultaneously in the hardware video decoder and the resolution of each of the plurality of still images. 2. The still image information processing method according to claim 1, wherein the resolution is unified and the still image is encoded as a moving image file having an I frame .   The still image information processing method according to claim 1 or 2, wherein the plurality of still images are displayed on the game machine by the continuous high-speed switching display. A hardware video decoder;
Based on the specifications of the instruction for the hardware video decoder, the software instruction is given to the hardware video decoder to request decoding of the encoded video, and as a result, the decoded video is transmitted from the hardware video decoder. A control unit for receiving and processing;
A display unit capable of displaying an image by receiving the decoded video from the control unit;
A still image information processing method for displaying a still image using a general-purpose information processing apparatus equipped with
The still image is divided into a single resolution based on the resolution of the hardware moving image decoder, and each of the divided still images is encoded as a moving image file including I frames, and is divided into a header of the moving image file, etc. Store information related to
The control unit issues a first instruction for creating a decode instance used for decoding the moving image file to the hardware moving image decoder, and then the control unit transfers a moving image to the hardware decoder. Give a second command for decryption on a file basis,
The control unit joins the divided still images based on the information related to the division stored in the header or the like and displays them on the display unit,
The control unit gives a third instruction to discard the decoded instance after the requested video file has been decoded .   5. The still image information processing method according to claim 4, wherein, in the encoding, a single resolution is obtained by applying dummy data to a portion where the ends after the division do not match. In the encoding, the resolution for dividing the still image is determined according to the number of decoding functions that can be simultaneously operated in the hardware video decoder and the resolution of the decoding function, and the control unit determines a desired resolution. 6. The still image information processing method according to claim 4 or 5, wherein a first command for creating a decode instance for ensuring a decoding function corresponding to is performed. The still image information processing method according to any one of claims 4 to 6, wherein the still image is displayed in a continuous high-speed switching display on a gaming machine.

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