JP2006031180A - Control program and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control program capable of reading desired data and displaying them on a display means, and a storage medium. <P>SOLUTION: The control program makes a computer function as a data determination means 17 determining whether or not read data are broken; a correspondence information reading means 18 reading, in case that the data are broken, correspondence information from attached information of the data or information of a specified information file; a corresponding data reading means 19 reading other data in reference to the correspondence information; and a display control means 20 making the display means display an image based on the data in case that the read data are displayable and display an image based on the corresponding data in case that the read data are not displayable. Since the other data can be read and displayed by the display means even if the one data are not displayable, an image based on image data can be easily and surely displayed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a control program for reading desired data and a recording medium on which data used in the control program is recorded.

  In recent years, various services related to photography have been provided. For example, a user takes a picture with a digital camera, brings the digital camera or digital camera media to a photo shop such as a minilab, and uses an unmanned terminal (kiosk) or store terminal provided in the store to Image data recorded on a medium can be written on a recording medium such as a CD-R or a DVD-R (for example, JP-A-5-182373).

  Also, when a user takes a picture with a film camera and brings the photographed film to a photo shop such as a minilab, the photo shop develops the film, reads the image data using a reading device such as a scanner, and the CD- There is also a service for writing to a recording medium such as R or DVD-R and providing it to the user.

  Also, based on image data read from a digital camera, media, or film, data in a format that can be played back by an image playback device such as a DVD player, DVD recorder, HDD recorder, or game machine is generated, and the original image data is generated. There is also a service for writing data to a recording medium such as a CD-R or DVD-R.

JP-A-5-182373 (page 4-6, Fig. 3)

  By using the above service, it is possible to obtain a recording medium on which image data recorded on a digital camera, media, etc., data for generated image reproduction equipment, etc. are recorded. By using this recording medium, These data can be stored and managed as a so-called electronic album.

  However, since the recording medium is used by being taken in and out of a computer device or an image reproducing device, for some reason, the recorded image data or some data in the image reproducing device data is damaged. In some cases, the data cannot be displayed. Therefore, in order to deal with such a problem, the data is recorded in a specific area of the recording medium, and the same data as the data is connected to another area of the recording medium, a hard disk of a computer device, or a communication network. It can be backed up to other recording means such as a home server or a web server.

  By recording the same data in a plurality of areas of the recording medium or in different recording means in this way, when one data cannot be displayed, the corresponding other data can be read and displayed. If the recording location of the other corresponding data is not known, the data cannot be read, and even if the recording location is known, the user must read the corresponding other data from the recording location. Becomes complicated.

  In addition, such problems are not limited to still image data based on photographic images, but also in moving image data obtained by shooting with a digital movie camera, music data acquired via the Internet, content data, and the like. Arise.

  The present invention has been made in view of the above problems, and its main purpose is a control program capable of reading out corresponding data even when the data is damaged, and image data used in the control program. Is to provide a recording medium on which is recorded.

  In order to achieve the above object, the control program of the present invention determines that the computer is a means for determining whether the first data read from the recording medium is damaged, and the first data is damaged. In this case, the association information for specifying the second data having the same image information as the first data is read from the information attached to the first data or the information described in the specific information file. And means for reading the second data with reference to the association information.

  Further, the control program of the present invention is a means for determining whether or not the first data read from the recording medium is damaged. When it is determined that the first data is damaged, the control program Means for reading association information for identifying second data having the same image information as the first data from information attached to one data or information described in a specific information file; Means for reading the second data with reference to the information, and if it is determined that the first data is not damaged, the image based on the first data is If it is determined that the image is based on the second data, it is made to function as means for causing the display means to display an image based on the second data.

  In the present invention, the association information includes a file name of the first data or the second data, or information specifying a recording location of the first data or the second data. preferable.

  In the present invention, the second data may be the same data as the first data except for at least one of a file name and incidental information.

  In the recording medium of the present invention, first data and second data having the same image information are recorded, and the other data is specified as at least one of the first data and the second data. Is associated information.

  Further, the recording medium of the present invention has a specific data in which association information for associating the first data and the second data having the same image information with the first data and the second data is described. An information file is recorded.

  In the present invention, information for identifying the recording medium may be recorded outside the logical address area of the recording medium.

  Thus, according to the configuration of the present invention, the read image data, the data generated based on the image data, and the like are recorded on the recording medium as a pair of data having the same image information, and at least one of the data Is associated information for specifying the other corresponding data, or the association information is described in a specific information file, and the control program reads one of the data read from the recording medium. If it is determined that the data is damaged, the association information is read from the information attached to the data or the information described in the information file, and the association information is referred to. When data corresponding to the data is read out and one of the data is not damaged, an image based on the one data is displayed. Since the image based on the other data is displayed on the display means, it is not necessary to determine whether or not the data read from the recording medium by the user himself / herself is damaged, or to search and read the corresponding data. The image based on it can be displayed easily and reliably.

  As described above, according to the control program and the recording medium of the present invention, even when the data to be displayed cannot be displayed due to damage or the like, the corresponding data can be automatically displayed on the display means.

  The reason is that the recording device can read image data from a medium, a digital camera, or the like, and can reproduce it on an image reproducing device such as a DVD player, a DVD recorder, an HDD recorder, or a game machine based on the read image data as necessary. Data, reduced image data with a reduced data size, and the like are generated, and the read image data and the generated data are a pair of data having the same image information (including data that differs only in file name and incidental information). Recording in a plurality of areas of the recording medium, or recording a pair of these data on the recording medium and other recording means such as a hard disk, a home server, a web server, etc. If it is determined that the data is damaged, it is attached to the data. The corresponding information is read from the information described in the specific information file or the information described in the specific information file, the data corresponding to the data is read from other areas of the recording medium or other recording means with reference to the read association information, This is because when one data can be displayed, an image based on the one data is displayed, and when one data cannot be displayed, a control based on the other data is displayed on the display means.

  In a preferred embodiment of the control program of the present invention, the data determination means for determining whether the read data is damaged or not when the read data is determined to be damaged. The association information reading means for reading the association information for identifying the other corresponding data having the same image information as the data from the information attached to the information or the information described in the specific information file, the read association Corresponding data reading means for reading the other data corresponding to the data with reference to the information, if the read data can be displayed, an image based on the data, and if the read data cannot be displayed, an image based on the corresponding data Function as display control means for displaying on a display means. When the image data recorded on the image data and the data generated based on the image data are recorded as a pair of data having the same image information, even if one data cannot be displayed, the other data is read and displayed. This makes it easy and reliable to determine whether the data that the user wants to display is damaged, or to search and read the corresponding data. Can be displayed.

  In order to describe the above embodiment in detail, a control program and a recording medium according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an external view schematically showing the configuration of the system of this embodiment, and FIGS. 2 to 4 are diagrams showing variations of the data display device in which the control program of this embodiment is executed. FIG. 5 is a block diagram showing means functioning by the control program, FIG. 6 is a flowchart showing a recording procedure of image data using the recording device, and FIG. 7 is image data using the data display device. It is a flowchart figure which shows the display procedure. 8 is a diagram schematically showing the structure of the recording medium (CD-R), FIG. 9 is a diagram showing a data recording area in the recording medium, and FIG. 10 is a diagram showing the data recording structure in the recording medium. It is a figure which shows an example. In the following, a case where a pair of data having the same image information is recorded on one recording medium 9 will be described, but this pair of data is recorded on the recording medium 9 and other recording means other than the recording medium 9. It may be recorded separately. In the following, a pair of data is two data of first data and second data, but three or more data may be associated with each other. The logical address area in the present specification and claims is an area in which user data (program) is recorded, a program memory area in which user data arrangement information is recorded, a lead-in TOC (Table Of Contents) area, lead-out area, and other information areas, disc application codes, recommended values for laser recording power, and other areas for guiding groove modulation (ATIP: Absolute Time In Pre-groove) information are recorded. In addition, the outside of the logical address area indicates an area other than the logical address area.

  As shown in FIG. 1, the system of the present embodiment includes a recording device 1 that records a pair of data having the same image information on a recording medium 9 and either one of the pair of data using the recording medium 9. The data display device 10 displays an image based on the data on the display means.

  The recording device 1 also includes a media loading unit 2 for loading a recording medium (hereinafter referred to as a medium 8) such as smart media, compact flash (registered trademark), memory stick (registered trademark), SD memory card, and multimedia card. , A digital camera 7 (including both a digital still camera and a digital movie camera), a camera-equipped mobile phone 7a and other photographing devices such as a device connection unit 3 for connecting by wired or wireless, infrared, etc., a communication network such as the Internet A means for inputting image data (still image data, moving image data, data including image information, etc. are collectively referred to as image data) using a network connection unit connected to the web server 16a via 15; The image data and the image are recorded on the recording medium 9 loaded in the medium loading unit 4. Means for recording data generated on the basis of data as a pair of data having the same image information (including a pair of data differing only in file name and incidental information), and operation of buttons, a keyboard, a mouse, etc. Means 6 and display means 5 such as LCD and CRT (in the figure, a touch panel having both the operation means 6 and the display means 5 is shown).

  In addition, the data display device 10 includes a recording medium loading unit 14 for loading the recording medium 9 on which the pair of data is recorded, and an internal hard disk 11, an external hard disk, and the data display device 10 as necessary. The data display device 10 includes a recording unit such as a home server 16b and a web server 16a connected to a network, a display unit 12 such as a monitor, and an operation unit 13 such as a keyboard and a mouse. Is pre-installed and executable.

  The block diagram of the means that functions according to the control program is as shown in FIG. 5. Of the pair of data, the first read data (referred to as first data for convenience) is damaged. From the information attached to the damaged first data or the information described in the specific information file, the first data and the other data corresponding to the first data Association information reading means 18 for reading information (hereinafter referred to as association information) for associating data (referred to as second data for convenience) and predetermined recording means with reference to the association information Corresponding data reading means 19 for reading the second data from (here, the recording medium 9) and, if necessary, an image based on the first data if it is determined that the first data is not damaged. And if the first data is determined to be corrupted and includes at least a display control unit 20 for displaying an image based on the second data on the display unit 12 such as a monitor.

  Although FIG. 1 shows the case where a personal computer is used as the data display device 10, the form of the data display device 10 is arbitrary. For example, a dedicated set-top box as shown in FIG. As shown in FIG. 4, it may be a portable writer, as shown in FIG. 4, an HDD recorder, a DVD recorder or a game machine provided with arithmetic processing means, or a car navigation device provided with arithmetic processing means.

  Hereinafter, a procedure for displaying an image based on the first data or the second data on the display unit 12 using the data display device 10 will be described. Before that, the same image is displayed on the recording medium 9 using the recording device 1. A procedure for recording a pair of data (first data and second data) including information will be described.

  First, in step S101, a recording medium 9 such as a CD-R / RW, DVD ± R / RW, DVD-RAM, or Blu-ray disc is loaded into the recording medium loading unit 4 of the recording apparatus 1. A general-purpose recording medium may be used as the recording medium 9, but in order to prevent unauthorized copying of image data, a recording medium in which predetermined identification information is written can be used. Reads the identification information from the specific area of the recording medium 9 in step S102. At that time, since the identification information is provided for recording data on an appropriate recording medium, if the recording location and contents of the identification information are easily known, the identification information itself is also copied, Since data cannot be recorded, at least a part of the identification information is information that cannot be recorded by the computer OS, specifically, information in the program memory area, and guidance given at the time of CD-R molding. It is preferable to use information by groove modulation (ATIP).

  Here, the structure of a general recording medium will be described with reference to FIG. 8. The CD-R is formed on a polycarbonate substrate 100 with an organic dye layer 101 such as cyanine, phthalocyanine, or azo and a reflective layer 102 such as silver. And a protective layer 103 are laminated to form a pit by applying a laser beam of a predetermined power to the organic dye layer 101 to decompose the dye and deform the substrate to record information. The laser power has an optimum value depending on the type of the laser head that irradiates the laser light and the type of the organic dye layer 101 to be used. Therefore, in order to reliably write information, the CD-R type or laser It is necessary for the drive side to recognize the recommended recording power. Therefore, information such as the disc application code and recommended laser recording power is written as guide groove modulation (ATIP) information at the manufacturing stage of the recording medium, and the information is read by the drive firmware. The laser power is adjusted by control. Since such guide groove modulation (ATIP) can only be created at the time of manufacture, copying at the user level can be prevented.

  The specific configuration of this identification information is arbitrary, and it can be used as identification information by appropriately setting lead-in start time, maximum lead-out start possible time, etc., other than guide groove modulation (ATIP). It is possible to easily and reliably identify whether the recording medium is properly created.

  Next, when predetermined identification information is recorded, in step S103, the medium 8 is loaded into the medium loading unit 2 of the recording apparatus 1, or the digital camera 7 or the camera-equipped mobile phone 7a is loaded into the device connection unit 3. The connection or network connection unit is connected to the communication network 15, and image data is read from the digital camera 7, media 8, server 11, etc. in step S 104. At this time, image data to be recorded on the recording medium 9 may be selected using the display means 5 or the operation means 6.

  In step S105, reduced image data such as thumbnail image data or screen nail image data obtained by reducing the data size of the read image data is created as necessary. The reduced image data only needs to have a data size smaller than the input image data. For example, the reduced image data may be image data with a reduced number of pixels, color data, or image data with a reduced color reproduction range.

  Next, in step S106, if necessary, after moving image data is generated based on the read image data, the moving image data can be reproduced by an image reproducing device such as a DVD player, a DVD recorder, an HDD recorder, or a game machine. Data is converted into data (Video-CD format, DVD-Video format, HDTV format, etc.). The method for creating the moving image data from the image data is not particularly limited. For example, when still image data is displayed like a slide show, the moving image is generated by adding data with a difference of 0 corresponding to the slide display time to the still image data. Data may be generated, or moving image data may be generated by adding difference data based on the slide effect set by the slide show program to still image data.

  Next, in order to write the read image data or generated data as a pair of data in the recording medium 9 in step S107, the first data (the image data read in step S104, the reduced image data generated in step S105, or The file name of the image reproduction device data generated in step S106 is changed according to a predetermined rule, and data corresponding to the first data (second data) is generated. In this case, when the first data and the second data are stored in different folders of the recording medium 9, it is not always necessary to change the file name, and these may be data having the same file name. The corresponding second data may be generated for all types of data including image data, reduced image data, and image reproduction device data, or one or more selected from these data. Although it may be generated only for the kind of data, the second data corresponding to only the read image data is generated here.

  Next, in order to be able to specify the other data when one data is damaged, in step S108, association information for associating both data is generated and associated. The association information only needs to be information that can clarify the correspondence between the two data. For example, information (path information) indicating the mutual file name or the recording location of the mutual data can be used. In addition, as a method of association, there are a method of recording each data as incidental information and a method of describing it in a specific information file. In the case of recording each data as supplementary information, for example, information such as the file name and path information of the data corresponding to the data is recorded in the header area of each data. In this case, if it is determined in advance which of the pair of data is to be read first, it is sufficient that the corresponding data can be identified from the data read first. It is only necessary to record only the data that is read first, and it is not always necessary to record the association information in both of the pair of data. When the association information is described in a specific information file, the file name or path name of one data is associated with the file name or path name of the other data corresponding to the data. Describe in. The association information may be recorded in either one of the data or a specific information file. However, when the first data is damaged, the information attached to the first data is also read. Since it may not be possible, it is possible to record the association information in both each data and a specific information file.

  Next, in step S109, the image data (first data) in which the association information is recorded on the recording medium 9 and the image data (second data) in which the association information is recorded as necessary, are necessary. Accordingly, a specific information file in which the association information is recorded, reduced image data such as thumbnail image data and screen nail image data, an application such as a slide show program, setting data thereof, data for image reproduction equipment, and the like are written. At that time, image data, reduced image data, a specific information file, an application, etc. can be read by a computer device even if they are recorded in any region, but an image reproducing device has a limited region from which data can be read. When recording data for an image reproducing device, it is recorded in the innermost area of the disk type recording medium.

  When a pair of data is generated for image reproduction device data, once the image reproduction device data (first data) is recorded and then the session is closed, the corresponding other image reproduction is performed. Even if the device data (second data) is recorded, the second data cannot be read by the image reproducing device. Therefore, in this case, it is preferable to record the data for one image reproducing device once, and then record the data for the other image reproducing device corresponding to the track at once method without closing the session.

  The data recording area in the recording medium 9 on which the first data and the second data are recorded by the above method is as shown in FIG. 9, for example, and the innermost area (outside the logical address area) of the recording medium 9 is predetermined. Identification information is recorded, and the generated image reproduction device data is recorded inside the logical address area, and further, the first data and the second data in which the association information is recorded are recorded in the outer area. Data, if necessary, a computer device data group including a specific information file, reduced image data, application, setting data, and the like is recorded.

  Here, there are various possible causes for the damage of the first data. For example, when the first data is damaged due to a scratch or the like generated on the recording surface of the recording medium 9, the first data and the second data If the first data and the second data are recorded in a near area on the recording medium 9, there is a possibility that both the first data and the second data may become unreadable. Therefore, in order to avoid such a situation, the first data and the second data can be recorded in different areas of the recording medium 9. In that case, the first data is recorded inside the logical address area, the other data such as a specific information file, application, and setting data is recorded outside it, and the second data is recorded outside it. Thus, by physically separating the recording areas of the first data and the second data, it is possible to make it difficult for both of the data to be read out.

  Further, the recording structure of the recording medium 9 created by the above procedure is arbitrary. For example, when the read image data is recorded as a pair of data, the recording data is as shown in FIG. OR030416000001.jpg to OR030416000010.jpg) and second data (OR030416010001.jpg to OR030416010010.jpg in the figure), and an information file (info.txt) in which association information is described as necessary, thumbnail image data, The screen nail image data, the slide show program in the “APPL” folder, the slide show setting file, the auto start file (Autorun.inf), etc. constitute a computer data group, and the image data in the “VCD” folder is converted to Video -Files associated as data for CD format, DVD-Video format, HDTV format, etc., TV screen in "SEGMENT" folder Image data to display, "MPEGAV" moving image data in the folder, "DAT" image reproduction device data group in an application for displaying still image data on the TV screen in a folder constructed.

  In addition, although the name and hierarchical structure of the folder in the recording structure are arbitrary, in order to facilitate management when image data is backed up to the data display device 10 or the like, the folder is configured according to a predetermined rule, A unique name can be assigned to the folder. For example, as shown in FIG. 10, folders (ROYYMMDDyyy_XXXXXXAABxxx, YYMMDD: writing year) indicating the storage location of image data for each medium 8, device, and film in the lower hierarchy of the folder (PS_Roll) indicating the storage location of image data Number specifying month and day, yyy: Sequential number for each day, XXXXXX: Random ID number, AA: Manufacturer code (00 to ZZ), B: Product category of software and equipment (0 to Z), xxx: Sequential number) Or each image data can be renamed to CCYYMMDDxxxxxx (CC: type of image data, YYMMDD: number specifying date of writing, xxxxxx: sequential number).

  In FIG. 10, a text format file is shown as the information file in which the association information is recorded. However, the format of the information file is arbitrary, for example, a dedicated file recommended in the photographic industry (for example, Or a file with an extension of pvm). The file in this format includes playback instruction information (for example, playback order, slide interval, slide effect, image rotation, BGM, etc.) and image search information (information input manually or information automatically recognized by an application). , Image header information recorded at the time of shooting, etc.), data history information (information relating to copying and migration, image data storage path information, etc.), ID information (disc ID, shop ID, shop URL, etc.) are recorded, If the association information is recorded as the image search information, the association information can be easily read.

  Next, a procedure for displaying data to be displayed on the data display device 10 using the recording medium 9 in which the first data and the second data are recorded in pairs according to the above procedure will be described with reference to FIG. This will be described with reference to the flowchart of FIG. In the following description, it is assumed that the read image data is recorded in pairs on the recording medium 9, but the same applies to the case where the reduced image data and the data for the image reproduction device are recorded in pairs. It can be processed in the procedure.

  First, in step S201, a control program installed in advance in the data display device 10 is activated. The control program is not necessarily installed in the data display device 10 in advance, and the control program may be recorded in the recording medium 9 and automatically started when the recording medium 9 is loaded.

  Next, in step S202, the recording medium 9 in which the first data and the second data are recorded as a pair by the above procedure is loaded in the recording medium loading unit 4.

  Next, in step S203, if necessary, it is determined whether or not predetermined identification information is recorded in a specific area of the recording medium 9. If predetermined identification information is recorded, recording is performed in step S204. First data is read from the medium 9. The method for reading the first data is arbitrary, and the first data may be automatically read sequentially based on the recording order or the file name order of the first data, or the display means 12 or the operation means 13 may be used. The user may select it.

  Next, in step S205, the data determination unit 17 determines whether the read first data is damaged. Here, as a case where the data is damaged, there may be a case where a part of the image information is missing or a case where a part of the image information is falsified. However, in the present invention, the data is damaged. The case where there is a case where the image based on the image information of the data body cannot be normally displayed means the whole case. The method for determining whether the data is damaged is not particularly limited. For example, information specifying the data size is read from the header of the first data, and the read data size and the actual data size of the first data are read. Can be used, or the first data can be actually displayed using a predetermined program, and a determination can be made based on whether the data can be displayed.

  If it is determined that the first data is not damaged, the process skips to step S208. If it is determined that the first data is damaged, the association information reading unit 18 is determined in step S206. Reads the association information such as the file name or path name identifying the second data corresponding to the first data from the information attached to the first data or the information described in the specific information file, In step S207, the correspondence data reading unit 19 refers to the read association information and reads the second data corresponding to the damaged first data.

  For example, when the file name of the corresponding second data is described in the header of the first data or the specific information file, the corresponding data reading means 19 is the recording medium 9, the hard disk 11, the home server 16b, the web. The server 16a or the like is searched to read the second data of the file name. If path information is recorded as the association information, the corresponding second data is read from the recording position specified by the path information. In step S204, the first data itself may not be read. In this case, the association information is read from the information described in the specific information file, and the read association information is referred to. The data of 2 may be read.

  Next, in step S208, when it is determined that the first data is not damaged, the display control unit 20 determines that the image based on the first data is damaged and the first data is damaged. In that case, an image based on the second data is displayed on the display means 12. In step S209, the same processing is repeated for the next first data.

  As described above, in the control program and the recording medium of the present embodiment, after determining whether the read first data is damaged or not, if it is determined that the data is damaged, it is attached to the first data. If the association information is read from the information described in the specified information file or the information described in the specific information file, the corresponding second data is read from the predetermined recording means with reference to the association information, and the first data can be displayed Displays the image based on the first data, and displays the image based on the second data on the display means 12 when the first data cannot be displayed, so that it is possible to determine whether the data read by the user is damaged or not. Thus, there is no need to search and read the corresponding second data, and the desired data can be displayed easily and reliably.

  In the above embodiment, the case of recording image data has been described. However, the present invention is not limited to the above embodiment, and the same applies to the case of recording other types of data such as music data. can do.

It is a figure which shows typically the structure of the system of one Example of this invention. It is a figure which shows the other external appearance structure of the data display apparatus which concerns on one Example of this invention. It is a figure which shows the other external appearance structure of the data display apparatus which concerns on one Example of this invention. It is a figure which shows the other external appearance structure of the data display apparatus which concerns on one Example of this invention. It is a block diagram which shows the means which functions by the control program which concerns on one Example of this invention. It is a flowchart figure which shows the recording procedure of the data using the recording device based on one Example of this invention. It is a flowchart figure which shows the display procedure of the data using the data display apparatus which concerns on one Example of this invention. It is a figure which shows the structure of a recording medium typically. It is a figure which shows the recording area of the data in the recording medium of one Example of this invention. It is a figure which shows the data recording structure in the recording medium of one Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording device 2 Media loading part 3 Device connection part 4 Recording medium loading part 5 Display means 6 Operation means 7 Digital camera 7a Cellular phone with camera 8 Media 9 Recording medium 10 Data display apparatus 11 Hard disk 12 Display means 13 Operation means 14 Recording medium Loading unit 15 Communication network 16a Web server 16b Home server 17 Data determining means 18 Corresponding information reading means 19 Corresponding data reading means 20 Display control means 100 Polycarbonate substrate 101 Organic dye layer 102 Reflective layer 103 Protective layer

Claims (9)

Computer
Means for determining whether the first data read from the recording medium is damaged;
When it is determined that the first data is damaged, the same image information as the first data is provided from information attached to the first data or information described in a specific information file. Means for reading the association information for specifying the second data;
A control program that functions as means for reading the second data with reference to the association information. Computer
Means for determining whether the first data read from the recording medium is damaged;
When it is determined that the first data is damaged, the same image information as the first data is provided from information attached to the first data or information described in a specific information file. Means for reading the association information for specifying the second data;
Means for reading the second data with reference to the association information;
When it is determined that the first data is not damaged, an image based on the first data is obtained. When it is determined that the first data is damaged, an image is obtained based on the second data. A control program for causing a display means to function as a means for displaying.   The association information includes a file name of the first data or the second data, or information for specifying a recording location of the first data or the second data. The control program according to 1 or 2.   The control program according to any one of claims 1 to 3, wherein the second data is the same data as the first data except for at least one of a file name and incidental information.   First data and second data having the same image information are recorded, and association information for specifying the other data is recorded as supplementary information in at least one of the first data and the second data. A recording medium characterized by being made.   First data and second data having the same image information, and a specific information file in which association information for associating the first data and the second data with each other are recorded. A recording medium characterized by the above.   7. The recording medium according to claim 5, wherein information for identifying the recording medium is recorded outside a logical address area of the recording medium.   The association information includes a file name of the first data or the second data, or information for specifying a recording location of the first data or the second data. The recording medium according to any one of 5 to 7.   9. The recording medium according to claim 5, wherein the second data is the same data as the first data except for at least one of a file name and incidental information.

Images