JP2004086558A - Content downloading method and its program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a content downloading method for downloading proper contents only by preventing the download of contents impossible to regenerate by a terminal. <P>SOLUTION: A one-packet header portion of the content is received by the terminal (S103) and whether identification information as part thereof showing the terminal permitting the download corresponds to identification information for the terminal or not is checked (S107). If it does not correspond thereto, the content is incorrect data impossible to regenerate by the terminal (YES in S109) and the download is immediately stopped (S111). If it corresponds, further packets are received and the identification information as further part thereof is repeatedly checked. At the time when it is determined to be incorrect data (YES in S119), the download is immediately stopped (S111). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a content download method and a content download program, and more particularly to a content download method and a content download program for realizing appropriate content download.
[0002]
[Prior art]
2. Description of the Related Art A method of downloading content created by a content creator to a terminal device such as a mobile phone and reproducing the content on the terminal device has been widely used.
[0003]
In a download method for downloading content from a content creation device to a terminal device, a user desires to download only appropriate content that has an appropriate data format or the like and can be played back on the terminal device.
[0004]
In order to respond to such a demand, it has been conventionally performed to embed key data which is identification information of a terminal device in a predetermined portion of content data. Then, according to the specification of the content reproduction software provided in the terminal device, the terminal device can execute reproduction of content data in the following two patterns.
(1) When all keys (identification information) match, reproduction of the content is permitted in the terminal device. When at least one key does not match, reproduction of the content is not permitted in the terminal device.
(2) If at least one of the keys matches, reproduction of the content is permitted in the terminal device.
[0005]
By the way, a downloading method as shown in FIG. 13 has conventionally been proposed in order to find illegal contents that cannot be reproduced by the reproducing apparatus. That is, referring to FIG. 13, the download of the content is completed, and all the data is brought to the terminal device (S1, S3). Then, the terminal device checks the magic number embedded at the head of the file (S5). Further, the checksum check and the matching of the identification information are performed (S7, S9). As a result of these checks, if the data is illegal data that cannot be reproduced by the terminal device (YES in S11), the downloaded content is discarded (S15), and only the non-illegal data is processed (NO in S11). Is registered (S13).
[0006]
The above-mentioned magic number is information such as the extension of the file embedded at the beginning of the content. By checking this, the displayed extension and the actual extension indicating the data format are displayed. , So-called “spoofed content” can be easily identified.
[0007]
[Problems to be solved by the invention]
However, the conventional content download method as described above has the following problems.
[0008]
That is, in the conventional content download method, the identification information is checked on the terminal device side after all the data has been downloaded. Therefore, even if the content is illegitimate data that cannot be reproduced, all the downloads must be completed, and there is a problem that it takes time to download the content. Therefore, there is a problem that a user is paid a useless packet fee.
[0009]
In addition, when web browsing is performed, it takes time to identify a content that cannot be reproduced by the terminal device, so that there is a problem that the browsing process is delayed.
[0010]
The present invention has been made in view of these problems, and a content download method and a content download method capable of preventing unreproducible content from being downloaded on a terminal device and downloading only appropriate content. The purpose is to provide the program.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, according to an aspect of the present invention, a method for downloading content is a method for downloading content including an area including identification information and an area including constituent elements, the method including: Identification information acquiring step of preferentially acquiring an area including the content, and permitting continuation of downloading of the content when the content identification information acquired from the content matches the terminal identification information of the terminal device that downloads the content. And steps.
[0012]
Further, it is preferable that the permission step permits the continuation of downloading of the content when the content identification information and the terminal identification information all match.
[0013]
Further, it is preferable that the permission step permits the continuation of the download of the content when at least one of the content identification information and the terminal identification information matches.
[0014]
The above-described identification information obtaining step obtains a predetermined area of the area including the content identification information, and the permission step determines whether the content identification information included in the predetermined area matches the terminal identification information. It is desirable to allow the continuation of downloading.
[0015]
According to another aspect of the present invention, a content download program is a content download program for causing a computer to execute a content download method including an area including identification information and an area including components. An identification information acquiring step of preferentially acquiring an area including information, and permitting continuation of downloading of the content when the content identification information acquired from the content matches the terminal identification information of the terminal device that downloads the content. And executing the permission step.
[0016]
Further, it is preferable that the permission step permits the continuation of downloading of the content when the content identification information and the terminal identification information all match.
[0017]
Further, it is preferable that the permission step permits the continuation of the download of the content when at least one of the content identification information and the terminal identification information matches.
[0018]
The above-described identification information obtaining step obtains a predetermined area of the area including the content identification information, and the permission step determines whether the content identification information included in the predetermined area matches the terminal identification information. It is desirable to allow the continuation of downloading.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are the same. Therefore, detailed description thereof will not be repeated.
[0020]
FIG. 1 is a diagram showing a configuration of a mobile phone 1 which is a terminal device for downloading content data in the present embodiment. In the present embodiment, the terminal device is described as being a mobile phone, but is not limited to a mobile phone, but may be a PDA (Personal Digital Assistants) or another communication terminal.
[0021]
Referring to FIG. 1, a mobile phone 1 as a terminal device according to the present embodiment is configured by a CPU (Central Processing Unit) and the like, and controls a control unit 101 for controlling the entire mobile phone 1 and a content for creating content. A communication unit 102 that communicates with another device such as a creation device; a storage unit 103 including a read only memory (ROM) or a random access memory (RAM); and an input / output unit that inputs and outputs instructions and information 110.
[0022]
The storage unit 103 stores programs executed by the control unit 101, data of downloaded contents, telephone directory data (telephone number data), and the like. Further, the ROM of the storage unit 103 stores identification information such as a telephone number of the mobile phone 1 and a code. The RAM of the storage unit 103 also serves as a work area when the control unit 101 executes a program.
[0023]
Further, the input / output unit 110 includes a number key, a scroll key, and the like, and includes an operation unit 111 for performing various operations, a display and the like, a display unit 112 for displaying content information and the like, and a microphone and the like. It includes a voice input unit 113 configured to input voice information, a voice output unit 114 configured by a speaker or the like to output voice information, and an image input unit 115 configured by a camera or the like to input image information.
[0024]
In the present embodiment, the above-mentioned code indicates identification information that is allocated in advance to a specific set of mobile phones for each set. Furthermore, a specific set includes each mobile phone of the same model, each mobile phone with the same version of content playback software installed, each mobile phone registered in a specific country or region, or a specific manufacturer's It is a set for each mobile phone.
[0025]
Note that the configuration of the mobile phone 1 shown in FIG. 1 described above shows a configuration of a general mobile phone, and is not limited to the above configuration.
[0026]
In the present embodiment, such a mobile phone 1 downloads and reproduces content from a content creation device. The operation at this time is shown in the flowchart of FIG. The process shown in the flowchart of FIG. 2 is realized by the control unit 101 of the mobile phone 1 reading and executing a program stored in the storage unit 103.
[0027]
Referring to FIG. 2, mobile phone 1 executes a process of receiving content data from a content creation device (S10), and registers the received content data in a library in storage unit 103 (S20). Then, the registered content data is reproduced (S30).
[0028]
Here, a specific example of the received content data is shown in FIG. As shown in FIG. 3, the content data includes a header portion and a body (body) portion, and is received in predetermined units called packets.
[0029]
Further, referring to FIG. 4, the header portion includes information indicating the attribute of the content such as a data format, copyright information indicating the creator, and the like, and a header specific to the model of the terminal device capable of reproducing the content. The information includes codes such as model information and area information indicating an area to be distributed by the creator of the content. The code included in the header of the content is information indicating a condition under which the content can be reproduced, and is information indicating an individual or a specific group to which the creator of the content intends to distribute the content.
[0030]
Referring to FIG. 4, the body portion includes graphic information, character information, image information, music information, and the like, which are components of the content.
[0031]
The embodiment of the present invention is characterized in that the mobile phone 1 as the terminal device performs the following content data reception processing in the above-described step S20. That is, FIGS. 5 and 6 show flowcharts of the content data reception processing in step S20 described above.
[0032]
Referring to FIG. 5, first, reception of content is started in communication unit 102 (S101). Then, when a predetermined amount is received from the beginning of the content (S103), the magic number of the received content data is checked (S105). The predetermined amount here is desirably data for one packet. Note that the check of the magic number in step S105 is a general identification process, and a description thereof will be omitted.
[0033]
Further, a code embedded in the content is checked (S107). The check of the code in step S107 will be described later in detail with reference to a subroutine. Note that the magic number check and the code check here may be performed in any order.
[0034]
In the following, description will be made assuming that this code is identification information that is allocated in advance for each model of a terminal device capable of reproducing the content, but the present invention is not limited to this.
[0035]
As a result of the check in steps S105 and S107, when it is determined that the received content is invalid data that cannot be reproduced (YES in S109), the download is immediately stopped (S111).
[0036]
If it is determined that the content being received is not illegal data (NO in S109), data of the packet next to the content is received (S113). Then, the code of the received data is checked (S115), and it is confirmed that the data is not invalid data (S119). The code check process in step S115 is the same as the process in step S107 described above, and will be described in detail below.
[0037]
The code check in step S115 described above is performed for all the header portions of the content data, and the check ends (YES in S121). That is, when the check is completed for all the codes included in the content (YES in S121), it is determined whether or not all data including the data of the body part of the content has been received with reference to FIG. (S123), all the remaining data is received (S125), and the reception of the content ends (S127).
[0038]
Further, the checksum is checked (S129), and if it is determined that the received content is invalid data (YES in S131), the content is discarded (S133). The checksum check performed in step S129 is a checksum type error detection method, which is one of widely used error detection methods, and will not be described in detail here.
[0039]
Thus, the content data receiving process is completed, and the content data received in step S20 is registered. Note that the data registration process in step S20 and the data reproduction process in step S30 are general processes, and thus description thereof will be omitted.
[0040]
In the content data receiving process, if the content being received is invalid data, the mobile phone 1 immediately stops downloading the content and displays a screen as shown in FIG. When the screen shown in FIG. 7 is displayed, the user is notified that the content is invalid data and the download has been stopped.
[0041]
Further, the code checking process in step S107 described above will be described with reference to the flowchart in FIG.
[0042]
Referring to FIG. 8, analysis (parse) of the received content data of one packet is started from the beginning (S201).
[0043]
First, one command is extracted from the received command (S203), and the command is interpreted (S205). As a result of the interpretation in step 205, the next instruction is fetched (S211) until the fetched instruction is a code (NO in S207).
[0044]
Then, if the extracted instruction is a code (YES in S207), it is checked whether or not the code matches the code of the mobile phone 1.
[0045]
If the code of the mobile phone 1 and the code embedded in the content all match (YES in S213), it is determined that it is unknown whether the content can be reproduced on the mobile phone 1 ( S215), the process returns to FIG.
[0046]
If at least one of the code of the mobile phone 1 and the code embedded in the content does not match (NO in S213), it is determined that the content cannot be reproduced on the mobile phone 1 (S217). ), The process returns to FIG.
[0047]
In step S109 of FIG. 4, if it is determined that the content is not reproducible on the mobile phone 1 as a result of the above code check, the content data is invalid data that cannot be reproduced. , The download is stopped in step S111.
[0048]
By performing the above-described processing on the mobile phone 1 in the present embodiment, a download as shown in FIG. 9 is realized. That is, referring to FIG. 9, the content can be downloaded only by a mobile phone in which the code embedded in the content by the creator of the content matches the code of the mobile phone. For this reason, in the terminal device, only the content that can be played back is downloaded, and the download of the content that cannot be played back can be prevented.
[0049]
Furthermore, in the mobile phone 1 according to the present embodiment, the above-described check processing is performed on the header portion of the content when a predetermined amount of data (for one packet) has been downloaded from the top, so that the conventional mobile phone 1 is different from the conventional one. No need to download and check all data. For this reason, it is possible to reduce the time required for downloading illegal contents that cannot be reproduced. As a result, web browsing can be accelerated. In addition, it is possible to reduce the packet cost borne by the user. Further, it is possible to prevent registration of unauthorized data that cannot be reproduced into the terminal device.
[0050]
Further, by using such a download method, it is possible to prevent the content creator from being downloaded by a terminal device that the content creator does not want to reproduce. For example, when a content creator embeds a code assigned to each terminal device to which content is to be distributed, such as a specific individual or a specific group, in the content, the content data can be downloaded only with the terminal device having the code. It is allowed.
[0051]
Therefore, the terminal device can automatically select only the content that can be reproduced, and the content creator (creating device) can select the terminal device that can reproduce the content. As a result, even when a system that does not require a server and does not include a server in the middle of a network as in the related art is constructed, the content creation device and the terminal Reproduction of content can be restricted.
[0052]
Note that the above-described code check processing shown in FIG. 8 may be the processing shown in FIG. That is, referring to FIG. 10, the above-described check in step S213 in FIG. 8 is replaced with a check of whether or not the code of mobile phone 1 and the code embedded in the content all match, and A check can be made as to whether at least one code of the telephone 1 matches the code embedded in the content.
[0053]
By performing the above-described processing on the mobile phone 1 in the present embodiment, a download as shown in FIG. 11 is realized. In other words, referring to FIG. 11, the content can be downloaded only by a mobile phone in which at least one code of the mobile phone matches the code embedded in the content by the creator of the content. For this reason, in the terminal device, only the content that can be played back is downloaded, and the download of the content that cannot be played back can be prevented.
[0054]
Further, even by using such a download method, it is possible to prevent the content creator from being downloaded by a terminal device that the content creator does not want to reproduce.
[0055]
In the data receiving (downloading) processing shown in FIGS. 5 and 6 described above, the code checking processing is repeatedly executed every time one packet is received in step S115. As shown, it can be omitted.
[0056]
In other words, when it is not known where a code is embedded as in the header portion of which a specific example of the configuration is shown in FIG. 4, it is effective to repeat the code checking process every time one packet is received. However, if it is determined in advance where the code is embedded in the header portion of the content, the content from the beginning of the content to the location where the code is embedded is received and the code is checked. Perform processing. As a result, if the content is invalid data that cannot be reproduced by the terminal device, the download can be immediately stopped.
[0057]
Further, the above-described content download method can be provided as a program. Such a program may be recorded on a computer-readable recording medium such as a flexible disk, a CD-ROM (Compact Disc-ROM), a ROM, a RAM, and a memory card attached to the computer, and may be provided as a program product. it can. Alternatively, the program can be provided by being recorded on a recording medium such as a hard disk incorporated in the computer. Further, the program can be provided by downloading via a network.
[0058]
The provided program product is installed and executed in a program storage unit such as a hard disk. Note that the program product includes the program itself and a recording medium on which the program is recorded.
[0059]
The embodiments disclosed this time are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a mobile phone 1, which is a terminal device for downloading content data in the present embodiment.
FIG. 2 is a flowchart showing processing in the mobile phone 1;
FIG. 3 is a diagram showing a specific example of a configuration of content data and a reception unit.
FIG. 4 is a diagram showing a specific example of a configuration of a header part and a body part of content data.
FIG. 5 is a first flowchart showing a content data receiving process in step S20.
FIG. 6 is a first flowchart showing a content data receiving process in step S20.
FIG. 7 is a diagram showing a specific example of display on the display unit 112 of the mobile phone 1.
FIG. 8 is a flowchart showing a code check process in step S107.
FIG. 9 is a diagram showing a first specific example of downloading content according to the present embodiment.
FIG. 10 is a flowchart showing a code check process in step S107.
FIG. 11 is a diagram showing a second specific example of downloading content according to the present embodiment.
FIG. 12 is a second flowchart showing the content data receiving process in step S20.
FIG. 13 is a flowchart showing conventional content data reception processing and registration processing.
[Explanation of symbols]
1 mobile phone, 101 control unit, 102 communication unit, 103 storage unit, 110 input / output unit, 111 operation unit, 112 display unit, 113 audio input unit, 114 audio output unit, 115 image input unit.

Claims (8)

A method for downloading content including an area including identification information and an area including constituent elements,
Identification information obtaining step of obtaining an area including the identification information of the content,
A content download method, comprising: when the content identification information obtained from the content matches the terminal identification information of the terminal device that downloads the content, permitting continuation of the download of the content. 2. The content download method according to claim 1, wherein the permitting step permits continuation of the download of the content when all of the content identification information and the terminal identification information match. The content download method according to claim 1, wherein the permitting step permits continuation of the download of the content when at least one of the content identification information and the terminal identification information matches. The identification information obtaining step obtains a predetermined area of the area including the identification information of the content,
The content according to any one of claims 1 to 3, wherein the permission step permits continuation of downloading of the content when the content identification information included in the predetermined area matches the terminal identification information. Download method. A content download program for causing a computer to execute a content download method including an area including identification information and an area including constituent elements,
Identification information obtaining step of obtaining an area including the identification information of the content,
A content download program that, when the content identification information obtained from the content matches the terminal identification information of the terminal device that downloads the content, executes a permission step of permitting continuation of the download of the content. The content download program according to claim 5, wherein the permission step permits continuation of the download of the content when all of the content identification information and the terminal identification information match. The content download program according to claim 5, wherein the permission step permits continuation of the download of the content when at least one of the content identification information and the terminal identification information matches. The identification information obtaining step obtains a predetermined area of the area including the identification information of the content,
The content according to any one of claims 5 to 7, wherein the permission step permits continuation of downloading of the content when the content identification information included in the predetermined area matches the terminal identification information. Download program.

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