JP2001117539A - Method of reproducing moving picture and system using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To always smooth the motion of a moving picture when the moving picture recorded by a video signal of a different display frequency from that being used for displaying already set graphics is overlay-displayed on the graphics. SOLUTION: A video signal stored in a temporary storage part 102 from an external part by a storage data calling part 101 is stored in a frame memory after decoded and image-processed, while a display frequency recognition part 131 recognizes a display frequency to be originally used when displaying from a video signal stored in the temporary storage part 102, and based on the recognized display frequency, a display frequency reset judging part 132 retrieves an integral multiple of the display frequency by a display frequency setting holding part 106 and judges the resetting of this display frequency only when the detected display frequency is a setting other than that being used, and following this, a display frequency setting part 107 is notified of this and resets a graphics processing part 108 to the judged display frequency for overlay- display.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a display frequency list which can be used for displaying a graphics screen of a system, selects and sets one display frequency from this list, and sets the set display frequency. The present invention relates to a moving picture reproducing method for displaying moving picture data inputted from the outside and temporarily stored on a graphics screen and a system using this method, and in particular, a display different from a display frequency which is already set and used for displaying a graphics screen. The present invention relates to a moving image reproducing method capable of always smoothing the movement of a moving image when a moving image recorded by a video signal of a frequency is displayed on a graphics screen as an overlay, and a system using the method.

[0002]

2. Description of the Related Art Conventionally, in this kind of moving picture reproducing method and a system using this method, as shown in FIG. 6, for example, a video signal is recorded by a personal computer (hereinafter abbreviated as a personal computer) or the like. External storage medium 201
When reproducing the stored data of the graphics screen, a part of the frame memory 605 for the graphics screen which is normally provided in the personal computer is allocated for the moving image, and the overlay processing unit 609 for synthesizing these outputs is provided. A method of displaying a moving image in the upper window or on the entire screen is generally used. As a result, there is no need to prepare a dedicated frame memory for moving images, etc.
Cost reduction has been realized.

A conventional system having such a configuration operates as follows, for example.

First, the display frequency setting holding unit 606 includes:
A list of only display frequencies, for example, as shown in FIG.
08, display interface unit 610, and display device 6
20 and are stored in a storage means such as a fixed disk as system-specific information.

When the graphics processing unit 608 writes graphics image data to the frame memory 605 and supplies the graphics image data to the overlay processing unit 609, the graphics processing unit 608 executes the display frequency list holding in the display frequency setting holding unit 606. , Generates a synchronization signal corresponding to the display frequency of the graphics screen selected and set by the display frequency setting unit 607 which has been previously instructed from the outside, and supplies it to the overlay processing means 609.

On the other hand, data called from the external storage medium 201 on which the encoded video signal is recorded is called by the storage data calling unit 601 and stored in the temporary storage unit 602. The moving image data stored in the temporary storage unit 602 is subjected to decoding processing such as MPEG decoding by the video information decoding unit 603, and is supplied to the image processing unit 604.

An image processing unit 604 converts the supplied data into a necessary enlargement / reduction conversion process and a conversion process including a color space conversion process such as conversion from a YUV color system to an RGB color system. Is performed, the processing into a format that can be combined with the graphics screen is completed, and the processed data is written into an area previously allocated for a moving image in the frame memory 605.

[0008] The overlay processing unit 609 is configured to display display data to be displayed on the graphics screen supplied from the graphics processing unit 608 from the frame memory 605 based on the synchronization signal supplied from the graphics processing unit 608 and the designated display data. The display interface unit 61 reads the moving image display data supplied from the image processing unit 604 to be displayed in the area corresponding to the moving image display window, and
Supply 0.

The display interface unit 610 combines display data for a graphics screen and moving image data supplied from the overlay processing unit 609, supplies the combined data to the display device 620, and displays the screen.

[0010]

The above-mentioned conventional moving picture reproducing method and the system using this method have the following problems.

A first problem is that when a moving image is displayed on a graphics screen of a personal computer or the like in an overlay manner, the motion of the synthesized and displayed moving image lacks smoothness.

[0012] The reason is that a moving image to be overlaid on a graphics screen is, for example, a DVD (Digit).
Like an Al Versatile Disk video, there is a case where the video is recorded by a video signal having a display frequency different from a display frequency on a graphics screen of a personal computer or the like.

That is, the display frequency on a graphics screen of a personal computer or the like is generally set to NTSC in a television to improve the display quality.
The display frequency used in video signals such as the system, for example, the display frequency of 30 frames per second, more than twice the display frequency of 7 frames per second
A display frequency of 5 frames is used. However, the display frequency on the graphics screen is the display frequency of the video signal stored in the frame memory for overlay display as a moving image on the graphics screen.
This is because it does not always become an integral multiple.

For example, as shown in FIG. 5, when a video signal having a display frequency of 30 Hz in the NTSC system is synthesized and displayed on a graphics screen having a display frequency of 75 Hz, the display of a moving image is controlled by 75 Hz and time is controlled. It is not a problem with still images because they are not regularly spaced, but it is unavoidable that images that are moving smoothly, such as a moving car or a human being walking, will lack smoothness. is there.

A second problem is that, in order to solve the above problem, when the display frequency of the graphics screen is set to a display frequency that is an integral multiple of the display frequency of a moving image to be synthesized and displayed, a moving image reproducing system is used. User is troublesome and complicated.

The reason is that the display frequency of the graphics screen is fixed at a constant value unless changed by the system user.

For example, a video signal generated from a film image such as a movie such as a DVD video has 24 frames per second, and a video signal generated from the NTSC system, which is a television signal, has 3 fields per second having 2 fields.
0 frames and a television signal PAL
A video signal of a different display frequency is used as a recording format according to each system, such that a video signal created by the system is 25 frames.

For this reason, in the case of reproducing while exchanging the recording media of these different systems, the display frequency of the video signal stored in the recording medium is checked before starting the reproduction, and the display frequency of the moving image reproducing system is checked. It is necessary to set

An object of the present invention is to solve such a problem and to overlay a moving image, which has been set and recorded by a video signal having a display frequency different from a display frequency used for displaying a graphic screen, on the graphic screen. An object of the present invention is to provide a moving image reproducing method capable of always smoothing the motion of a moving image when displaying the moving image, and a system using the method.

[0020]

A moving image reproducing method according to the present invention has a display frequency list which can be used for displaying a graphics screen for reproducing a moving image, and selects and sets one display frequency from this list. In the moving picture reproducing method of displaying the moving picture data inputted from the outside and temporarily stored on the graphics screen using the set display frequency, the display frequency of the temporarily stored moving picture data is recognized and the recognized display is performed. A display frequency that is an integral multiple of the frequency is calculated, selected from the list, and set as a display frequency when displayed on the graphics screen.

Further, in the moving picture reproducing method according to the present invention, the list is provided with a selection priority of display frequencies, and the display frequencies in the list are selected until a display frequency that is an integral multiple of the recognized display frequency is selected from the list. Searching sequentially according to the priority order, or, when selecting a display frequency that is an integral multiple of the recognized display frequency from the list, as a reset only when the selected display frequency is different from the one already set for use. It may be an update setting.

Also, the moving picture reproduction system according to the present invention
It has a display frequency list that can be used for displaying the graphics screen of the system, selects and sets one display frequency from this list, and uses this set display frequency to externally input and temporarily store moving images In a moving picture reproducing system for displaying data on the graphics screen, a display frequency recognizing unit for retrieving the temporarily stored moving picture data and recognizing a display frequency of the moving picture data, and calculating a display frequency of an integral multiple of the recognized display frequency. A display frequency reset determination unit that determines a display frequency to be selected and used from the list, and a display frequency setting unit that sets the display frequency when the determined display frequency is received and displayed on the graphics screen. ing.

In the moving picture reproducing system according to the present invention,
The list is provided with a selection priority order of display frequencies, and the setting determination unit sequentially searches display frequencies in the list in accordance with the priority order until a display frequency that is an integral multiple of the recognized display frequency is selected from the list. Or, the list is provided with a mark for the display frequency in use, the setting determination unit, when selecting a display frequency of an integer multiple of the recognized display frequency from the list, the selected display frequency is already in use. The resetting may be determined only when the setting is different from the setting.

With such means, a display frequency which is an integral multiple of the display frequency of the video signal of the moving image temporarily stored and scheduled to be displayed on the graphics screen is automatically set as a moving image reproducing system and the moving image is displayed. Are equally spaced in time, so that when displaying a moving image on a graphics screen in an overlay manner, the movement of the moving image can always be smoothed without any trouble of the user.

[0025]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram showing an embodiment of the present invention. Video reproduction system 10 shown in FIG.
0, the storage data calling unit 101, the temporary storage unit 102,
The video information decoding unit 103, the image processing unit 104, the frame memory 105, the display frequency setting holding unit 106, the display frequency setting unit 107, the graphics processing unit 108, the overlay processing unit 109, the display interface unit 110, and the display device 120 A display frequency recognizing unit 131 and a display frequency reset determining unit 132 are provided in addition to the same components as those in the related art.

FIG. 1 differs from FIG. 6 of the conventional example in that the display frequency recognizing section 131 and the display frequency reset determining section 13 are different.
2, and the display frequency setting holding unit 106 previously stores and holds the display frequencies and the priority order when selecting the display frequencies as shown in FIG. The display frequency is marked, and the display frequency setting unit 107 changes the setting of the display frequency of the display frequency setting holding unit 106 and the graphics processing unit 108 according to the instruction of the display frequency reset determination unit 132. .

The storage data retrieving unit 101 retrieves moving image data from the external storage medium 201 on which the encoded video signal is recorded, and stores the retrieved moving image data in the temporary storage unit 102. Temporary storage unit 102 temporarily stores various data.

The video information decoding unit 103 stores the temporary storage unit 10
The video signal subjected to the processing such as compression or encoding stored in 2 is restored by decompression or decoding and supplied to the image processing unit 104. The image processing unit 104 performs color space conversion such as enlargement or reduction of the supplied digital video signal according to the size of the display screen or conversion from the YUV color system to the RGB color system as necessary. The data is converted into a format that can be synthesized and displayed on the graphics screen, and is temporarily stored in a predetermined area of the frame memory 105.

As shown in FIG. 4, for example, the display frequency setting holding unit 106 includes a list of display frequencies that can be used for displaying a graphics screen of the present system, and a display frequency that is set during use at that time. And the priority order in searching for the display frequency in the list. The display frequencies in the list are determined in advance mainly from the specifications of the graphics processing unit 108, the display interface unit 110, and the display device 120, and are held in storage means such as a fixed disk as system-specific information. It is assumed that the priorities in the list are, for example, ranked from the highest display frequency, and only the display frequencies set in use are set to the highest priority.

The display frequency setting unit 107 initially stores, for example, a predetermined highest priority display frequency held in the display frequency setting holding unit 106 in the display frequency setting holding unit 1.
06, the setting is made for the graphics processing unit 108, and the display frequency setting holding unit 106 marks the setting of the display frequency in use as well as sets the highest priority to a predetermined priority. Thereafter, the display frequency setting unit 107 sets a display frequency based on the display frequency information received together with the reset information from the display frequency reset determination unit 132 in the graphics processing unit 108.
Based on the setting, the display frequency setting unit 107 updates the mark of the setting in use and the highest priority in the display frequency setting holding unit 106 to the newly set reset display frequency.

The graphics processing unit 108 temporarily stores the graphics screen in a predetermined area of the frame memory 105 and transmits the display frequency to the overlay processing unit 109 to control the display of the graphics screen.

The overlay processing unit 109 includes the image processing unit 1
04 and the graphics screen stored from the graphics processing unit 108 are stored in the frame memory 105 under the control of the graphics processing unit 108.
, And combine them, and supply them to the display interface unit 110.

The display interface unit 110 performs processing such as signal conversion according to the type of the display device 120 and drives the display device 120. For example, when the display device is a CRT display device with analog input, D / A conversion processing is performed. When the display device is a liquid crystal display device with digital input, signal conversion for driving the liquid crystal display device is performed.

As described above, the display device 120 includes, for example, a CRT display device, a liquid crystal display device, etc., and a video signal supplied from the display interface unit 110 is displayed on a screen. Display interface unit 1
According to the ten specifications, the display device 120 can be connected to the display interface unit 110 as at least one display device of plural types or plural types.

When the encoded video signal is stored in the temporary storage unit 102, the display frequency recognizing unit 131 extracts information on the original display frequency for displaying the video signal from the stored video signal data. Then, it is supplied to the display frequency reset determination section 132.

The display frequency reset determination unit 132
From the information received from the display frequency recognizing unit 131, it is determined whether or not it is necessary to reset the in-use setting marked by the display frequency setting holding unit 106. If the setting needs to be reset, the display setting unit 107 Notify. Details will be described later with reference to FIG.

Next, the main operation procedure will be described with reference to FIG.

First, the storage data retrieving unit 101 reads out moving image data from the external storage medium 201 on which the encoded video signal is recorded, and stores it in the temporary storage unit 102.

Next, the display frequency recognizing unit 131 converts the display frequency information at which the video signal stored in the temporary storage unit 102 should be originally displayed from the moving image data stored in the temporary storage unit 102 into the color moving image compression / decompression. The video signal is extracted in accordance with a data format based on a known video signal encoding method such as the MPEG2 method, and supplied to the display frequency reset determination unit 132.

The display frequency reset determination unit 132 acquires from the display frequency setting holding unit 106 a list of display frequencies that can be used for displaying the graphics screen and information on the display frequencies that are set to be in use at that time. The display frequency setting unit 107 compares the display frequency supplied from the display frequency recognition unit 131 with the display frequency, and determines whether or not to reset the display frequency used for display.

Here, the operation procedure of the display frequency reset determination section 132 will be described in detail with reference to FIG. 1 and FIG. 2 and FIG.

In the display frequency setting holding unit 106, as shown in FIG. 4, it is assumed that 85 Hz is set as the display frequency A in use (procedure S1). Also, as shown in FIG. 4, the priority order is 85 Hz, 100 Hz,
It is assumed that the order is 75 Hz, 72 Hz, and 60 Hz.

The display frequency reset determination unit 132 sets the display frequency Y recognized by the display frequency recognition unit 131 to, for example, 24 frames per second in the case of a video signal encoded based on a film video of a movie or the like. It is assumed that display frequency information of (24 Hz) has been input (step S2).

Upon receiving the input of the display frequency information of the display frequency Y of 24 Hz, the display frequency reset determination section 132
The display frequency setting holding unit 106 is searched to obtain 85 Hz set in use as the display frequency X1 of the highest priority 1 (step S3), and whether or not 85 Hz of the display frequency X1 is an integral multiple of 24 Hz of the display frequency Y. (Step S4)
I do.

In this example, since it is not an integral multiple, the procedure S4
Is “NO”, and the display frequency reset determination unit 132
The display frequency Xi as the next priority candidate is searched by the display frequency setting holding unit 106 (step S5).

In this example, since there is a display frequency of the next priority order candidate, the procedure S5 is "YES", and the display frequency X1 of 85 Hz is changed to the next display frequency X2 of 100H.
z (procedure S6) and display frequency X2 of 100 Hz
Returns to the above step S4 for determining whether or not is an integral multiple of 24 Hz of the recognition display frequency Y, and in step S4, "YES" of the integral multiple
The above procedure is repeated until.

When the display frequency Xi of the list in the display frequency setting holding unit 106, which is an integral multiple of 24 Hz of the recognition display frequency Y, becomes the display frequency X4 of 72 Hz, the procedure S4 becomes "YES". If step S4 is “YES”, the display frequency reset determination unit 132 determines that the display frequency X4
Is compared with the display frequency A of 85 Hz set during use (step S7).

In this example, 85 Hz of the display frequency A set during use is different from 72 Hz of the display frequency X4 which is an integral multiple of the recognized display frequency Y.
7 is “NO”. Therefore, the display frequency reset determination unit 132 determines 72 Hz of the display frequency X4 as the display frequency of the reset, and notifies the display frequency setting unit 107 (step S
8) Yes.

If the above-mentioned step S7 is "YES" and the display frequency A set in use matches the display frequency Xi which is an integral multiple of the recognized display frequency Y, the use setting of the display frequency A is changed. Since the process is continued (step S9), the display frequency reset determination unit 132 sets the display frequency setting unit 107.
Take no action on.

If the above step S5 is "NO", it is assumed that there is no suitable display frequency in the list of the display frequency setting holding unit 106, and a notification that the selection is impossible (step S10) is displayed. At this time, the input video information is displayed on the screen according to the display frequency set during use. Of course, this procedure does not limit the invention.

The description will be continued with reference to FIG. 1 again.

The display frequency setting unit 107, which has received the notification of the display frequency information to be reset in step S8, instructs the graphics processing unit 108 to reset the display frequency by a predetermined method and to execute the same. At this time, depending on the specifications of the graphics processing unit or the display device, a phenomenon such as temporary disappearance of the screen display due to the change of the display frequency is expected, so a message urging the user to confirm the change will be displayed. It is desirable to display it and wait for confirmation input from the user to execute resetting.

The graphics processing unit 108 writes display data to be displayed as a graphics screen in an area allocated for graphics display in the frame memory 105, and receives the display for resetting received from the display frequency setting unit 107. A synchronization signal corresponding to the frequency is supplied to the overlay processing unit 109.

On the other hand, the video information decoding unit 103 converts the encoded video information stored in the temporary storage unit 102 into M
An appropriate decoding process such as PEG decoding is executed and supplied to the image processing unit 104. The image processing unit 104 converts the supplied decoded data into a format that can be combined with a graphics screen, so as to perform necessary expansion or contraction processing, or from a YUV color system to an RGB color system. Then, a color space conversion process or the like is performed by converting the image into a region, and the image is written in a region previously allocated for a moving image in the frame memory 105.

The overlay processing unit 109 stores display data stored in the frame memory 105 and displayed on the graphics screen and stored in the area allocated for moving images in the frame memory 105 supplied from the image processing unit 104 and designated. Display data displayed in an area corresponding to the displayed moving image display window,
08 to the display interface unit 110 based on the synchronization signal supplied from 08.

The display interface unit 110 combines the two display data for the graphics screen and the moving image supplied from the overlay processing unit 109 and combines the two display data with each other.
20 on the screen.

As a result, the display frequency of the graphic screen is an integral multiple of the original display frequency for the moving image, so that the moving image can be displayed smoothly.

Next, another embodiment different from FIG. 1 will be described with reference to FIG.

The moving picture reproducing system 300 shown in FIG.
Are stored data calling unit 301, temporary storage unit 302, video information decoding unit 303, image processing unit 304, frame memory 305, display frequency setting holding unit 306, display frequency setting unit 307, graphics processing unit 308, overlay processing 1, a display interface unit 310, a display device 320, a display frequency recognition unit 331, and a display frequency reset determination unit 332, and a network connection unit that connects the video playback system 300 to an external network. 341, a digital broadcast receiving unit 342 for receiving digital broadcasts, and a video data input unit 343 connected to an external video device.

FIG. 3 differs from FIG. 1 in that a network connection unit 341, a digital broadcast reception unit 342, and a video data input unit 343 are added to the configuration, and a new moving image format is generated. The video information decoding unit 303, the image processing unit 304, the display frequency recognition unit 331, and the display frequency setting holding unit 306 may be changed.

That is, the network connection unit 341
An encoded video signal is fetched from a LAN (local area network) constituted by a wired or wireless transmission path or an external network connected via a high-speed modem or the like, and stored in the temporary storage unit 302.

The digital broadcast receiving section 342 receives a radio wave of digital broadcast using a broadcasting satellite or a terrestrial wave and takes in an encoded video signal into a moving picture reproducing system.
It is stored in the temporary storage unit 302.

A video data input unit 343 takes in a video signal encoded by connecting to an external video device that outputs a digital video signal, such as a digital video camera for home use, into the video reproduction system 300 and temporarily stores the video signal.
Is stored in

The coded video signal fetched from each of the network connection unit 341, the digital broadcast receiving unit 342, and the video data input unit 343 in each procedure is stored in the temporary storage unit 302 as described above. .

Next, the display frequency recognizing unit 331 extracts the original display frequency information for displaying the video signal from the moving image data stored in the temporary storage unit 302 in the form of the respective code data, and redisplays the display frequency information. Setting judgment unit 3
32.

The subsequent operation is the same as that described with reference to FIG. 1, and a description thereof will be omitted.

In the above description, for example, in the display frequency setting holding unit, the display frequency is set to the order from the highest display frequency, while the display frequency set in use is set to the highest order among the display frequencies. The ranking can be freely set, and does not need to be limited to the above conditions.

In order to simplify the control, when the display frequency set during use is an integral multiple of the recognized display frequency supplied from the display frequency recognition unit, the display frequency reset determination unit is configured to execute As a result of comparing and judging the coincidence, it has been described that no setting is designated in the display frequency setting section. However, the function of the display frequency setting unit is changed without providing the display frequency reset determination unit, and the display frequency setting unit receives the display frequency information directly from the display frequency recognition unit, and when the display frequency information is received, the display frequency information is displayed. The procedure may be a procedure of confirming and setting in the setting holding unit.

In the above description, functional blocks and partial operation procedures are illustrated and described. However, a change in the block configuration by separating and merging the functions or a change by changing the order of the procedures is free as long as the above functions are satisfied. The description is not intended to limit the invention.

[0071]

As described above, according to the present invention, the following effects can be obtained.

The first effect is that a moving image recorded by a video signal having a display frequency different from the display frequency that is already set in a personal computer or the like and used for displaying a graphics screen is displayed on the graphics screen in an overlay manner. However, the motion of a moving image can always be smoothed, and high image quality can be maintained.

The reason is that the moving picture reproducing system recognizes the display frequency to be originally used when displaying the moving image to be displayed on the graphics screen from the temporarily stored video signal, and based on the recognized display frequency. This is because a display frequency that is an integral multiple of that is reset for overlay display. As a result, the moving images are displayed at equal intervals in time, so that a smoothly moving image, for example, a moving car or a walking person, does not impair the smoothness of the displayed motion. is there.

The second effect is that, even when a plurality of mutually different video signals are sequentially input from the outside, the display frequency of the graphics screen is set to a display frequency that is an integral multiple of the display frequency of the moving image to be synthesized and displayed. That is, the motion of a moving image can always be smoothly performed without any trouble, and high image quality can be maintained.

The reason for this is that, similarly to the above, the moving picture reproducing system recognizes the original display frequency from the temporarily stored video signal each time moving picture data is input from outside without any user's trouble, and this recognition is performed. This is because the overlay processing with the graphics screen is performed with the display frequency reset based on the display frequency.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing one embodiment of an operation procedure in a part of FIG. 1;

FIG. 3 is a functional block diagram showing another embodiment different from FIG. 1;

FIG. 4 is a table showing one embodiment of a data storage state in FIG. 1;

FIG. 5 is a time chart showing an example of a temporal correspondence to two different display frequencies.

FIG. 6 is a functional block diagram showing an example of the related art.

[Explanation of symbols]

 100, 300 Video playback system 101, 301 Storage data recall unit 102, 302 Temporary storage unit 103, 303 Video information decoding unit 104, 304 Image processing unit 105, 305 Frame memory 106, 306 Display frequency setting holding unit 107, 307 Display Frequency setting unit 108, 308 Graphics processing unit 109, 309 Overlay processing unit 110, 310 Display interface unit 120, 320 Display device 131, 331 Display frequency recognition unit 132, 332 Display frequency reset determination unit 201 External storage medium 341 Network connection Unit 342 Digital broadcast receiving unit 343 Video data input unit

Claims (6)

[Claims] 1. A display frequency list which can be used for displaying a graphics screen for reproducing a moving image is provided. One of the display frequencies is selected from the list and set. In the moving image reproducing method of displaying the input and temporarily stored moving image data on the graphics screen, a display frequency of the temporarily stored moving image data is recognized, and a display frequency of an integral multiple of the recognized display frequency is calculated. A moving image reproducing method, wherein the method is selected from a list and set to a display frequency for displaying on the graphics screen. 2. The display list according to claim 1, wherein the list has a display frequency selection priority order, and the display frequencies in the list are selected according to the priority order until a display frequency that is an integral multiple of the recognized display frequency is selected from the list. A moving image reproducing method characterized by sequentially searching. 3. The method according to claim 1, wherein when a display frequency that is an integral multiple of the recognized display frequency is selected from the list, the display frequency is reset only when the selected display frequency is different from the one already set for use. A moving image playback method, wherein the update setting is performed as: 4. A display frequency list which can be used for displaying a graphics screen of the system is provided, one display frequency is selected from the list and set, and an external input is performed using the set display frequency. A moving image reproducing system for displaying the moving image data temporarily stored on the graphics screen, a display frequency recognizing unit for retrieving the temporarily stored moving image data and recognizing a display frequency of the moving image data, and an integral multiple of the recognized display frequency. A display frequency reset determination unit that calculates the display frequency of the display frequency and selects the display frequency to be used from the list, and a display frequency that is set to the display frequency when the determined display frequency is received and displayed on the graphics screen A moving image playback system comprising a setting unit. 5. The display frequency selection method according to claim 4, wherein the display frequency selection priority order is set in the list, and the display frequency reset determination unit selects the display frequency from the list until an integer multiple of the recognized display frequency is selected from the list. A moving image reproducing system for sequentially searching for display frequencies in the order according to the priority order. 6. The display list according to claim 4, wherein a mark for a display frequency in use is provided in the list, and the display frequency reset determination unit selects a display frequency that is an integral multiple of the recognized display frequency from the list. A moving image reproducing system that determines re-setting only when the selected display frequency is different from the one already set during use.