JP2004343189A - Content distribution method and content distribution apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain content distribution reflecting the intention of a content author. <P>SOLUTION: A copyright management platform 2 registers and stores a transmission bit rate proper to reproduce contents received from an application node 1 as attribute data in the case of the registration of the contents. Then an application node 1 at viewing the contents compares a downlink contract transmission bit rate of an end user terminal 5 received from the end user terminal 5 or the like or an effective transmission speed with a transmission bit rate proper to reproduce the contents received from the copyright platform 2, permits the distribution of the contents when the downlink contract transmission bit rate of the end user terminal 5 or the effective transmission speed is equal to or higher than the transmission bit rate required to reproduce the contents, and informs the end user terminal 5 about the disabled provision of the service when not. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to content distribution technology, and more particularly, to a method and apparatus for distributing a video stream from a media distribution platform.
[0002]
[Prior art]
As a conventional content distribution technology, there is a technology described in Non-Patent Document 1 below. FIG. 9 shows a system configuration of a related part. Reference numeral 10 denotes an application node that runs an application, 2 denotes a copyright management platform in which attribute data of the content is registered, 3 denotes a charging / paying platform for performing charging processing, 4 denotes a media distribution platform that distributes content to end-user terminals, and 5 denotes content. , An operator terminal 6 for registering contents, 7 a network, 8 a video cassette tape, and 9 an encoding conversion device.
[0003]
The end user terminal 5 is connected to the application node 10, the encoding conversion device 9, the operator terminal 6, and each platform via the network 7. In the application node 10, a Web server operates in addition to the application server.
[0004]
The copyright management platform 2 includes a management server and a watermark embedding server. The media distribution platform 4 includes an input terminal, a distribution server, and a reproduction player on the end user terminal 5. The content stored on the video cassette tape 8 is encoded by the encoding conversion device 9 and stored in the server of the media distribution platform 4.
[0005]
Here, FIG. 10 shows a registration sequence of content to be distributed by video on demand (VOD).
[0006]
(1) When content registration is started using the operator terminal 6, the application node 10 stores the content as a primary file 201 in its own server, and records application-specific content attribute data 202 (S201). .
[0007]
(2) The application node 10 requests the copyright management platform 2 to register and issue the content (S202). The copyright management platform 2 stores the original content (entity file) 203 and attribute data (IPR data) 204 unique to the copyright management platform 2, embeds the paid-out content ID as a digital watermark (S203), and To the application node 10 (S204). Note that the IPR data of the attribute data 204 refers to intellectual property information. Further, the copyright management platform 2 saves the protected content 205 in which the digital watermark is embedded as a secondary file.
[0008]
(3) The application node 10 transfers the secondary file (the protected content 205) embedded with the digital watermark to the media distribution platform 4 to the input terminal of the media distribution platform 4 and requests registration (S205). When the secondary file is transferred to the distribution server of the media distribution platform 4 and the application node 10 is notified of the registration, the registration processing of the distribution content 206 is completed (S206).
[0009]
Currently, the content ID is being standardized in a content ID forum (cIDf: CONTENT ID Forum), and is disclosed as a specification in the following non-patent document 2 (the homepage of the content ID forum).
[0010]
A content ID that conforms to cIDf is used. FIG. 11 shows the basic structure of the content ID. The content ID is composed of an ID center management number, which is an identification number of the content, a content attribute and a right attribute determined at the time of content creation / registration, and a right operation attribute / distribution attribute / distribution attribute determined at the time of content distribution. Under each attribute, more detailed attribute items are defined.
[0011]
FIG. 12 shows an example of a purchase / viewing sequence for pay VOD content.
(1) The end user executes a content purchase request (S401).
(2) The end user follows the terminal screen and acknowledges that the user may be charged for the purchase (S402).
(3) The application node 10 requests charging processing to the charging settlement platform 3 (S403).
(4) The billing process is performed by the billing settlement platform 3 (S404).
(5) When the accounting settlement result is notified from the accounting settlement platform 3 to the application node 10, the content contract data / use history 401 of the end user existing in the application node 10 is updated (S405).
(6) The billing result is displayed on the screen of the end user terminal 5 (S406).
(7) A viewing request is received from the end user (S407).
(8) The application node 10 notifies the end user terminal 5 of the URL of the metafile of the content (S408).
(9) Since the URL and the content type of the content are described in the metafile, the Web browser of the end user terminal 5 determines and starts the playback player from the content type (S409).
(10) The end user terminal 5 issues a reproduction request to the URL of the distribution server of the media distribution platform 4 in which the content is accommodated (S410).
(11) The content 206 for distribution is transmitted from the distribution server of the media distribution platform 4 to the end user terminal 5 as a video stream (S411).
[0012]
[Non-patent document 1]
Koji Nada and 5 others, "Development of video content service software", NTT
R & D, Vol. 51, No. 2, 2002, p. 146-154
[Non-patent document 2]
Internet <URL: http: // www. cidf. org / ＞
[0013]
[Problems to be solved by the invention]
In the conventional technology, the content creator's intention cannot be reflected at the time of distribution. For example, to achieve the effect expected by the content creator, even if the minimum distribution bit rate is limited, Sales and video distribution, quality deterioration such as skipping of the distribution video occurs, which has caused a bad impression on the content.
[0014]
SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems of the prior art and to enable content distribution reflecting the intention of a content creator.
[0015]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a method of controlling the video bit rate and audio bit rate written in the distribution attribute of the content ID and the data transmission rate or effective transmission The speed is compared with the reproduction capability of the end user terminal, and if the condition is not satisfied, the service is not provided.
[0016]
In addition, the present invention relates to a method of storing user restriction information such as age restriction written in the use condition of the distribution attribute of the content ID when viewing a pay VOD or the like, and user information obtained from the end user terminal. Are compared, and if the user information of the end user falls under the restriction, the service provision is disabled.
[0017]
That is, according to the present invention, in a system for distributing contents via a network, when registering contents to be distributed, a content ID is paid out, attribute data of the contents is registered in a copyright management platform, and a content purchase request is received from a user. In some cases, the information received from the user terminal is compared with the attribute data received from the copyright management platform, and whether to deliver the content is determined based on the comparison result.
[0018]
Also, the present invention provides a system for distributing contents via a network, in which contents to be distributed are registered at a plurality of allowable bit rates for the same literary work, and when a purchase request is made by a user. The content is delivered at a bit rate that matches the contract transmission rate or the effective transmission rate received from the user terminal or the network device, and if there is no match, the content is not delivered.
[0019]
Also, the present invention provides a method for distributing a content in the above-mentioned system, when a contract transmission speed or an effective transmission speed received from a user terminal or a network device is higher than a transmission speed required for reproducing the content received from a copyright management platform. And if the contract transmission rate or the effective transmission rate received from the user terminal or the network device is lower than the transmission rate required for reproducing the content received from the copyright management platform, the content distribution is not permitted. And
[0020]
Further, according to the present invention, in the system, when registering the attribute data of the content in the copyright management platform, the user restriction information of the content is registered as the attribute data in the copyright management platform and input from a user terminal or a network device. User information, such as the age and access area of the user, and the user restriction information received from the copyright management platform, and as a result of the comparison, the user's age and access entered from the user terminal or network device If the user information such as the area is out of the range related to the user restriction information received from the copyright management platform, the distribution of the content is permitted, and the user's age and access area entered from the user terminal or network device User information such as the copyright management platform Characterized in that it does not allow the delivery of content in the case of within the limits related to user restriction information received from the beam.
[0021]
By using the present invention, if the contract transmission bit rate or the like of the user terminal is not a band sufficient for content reproduction, the provision of the service can be stopped, and the intention of the content creator is reflected in the distribution of the content. Can be.
[0022]
Also, by using the present invention, it is possible to reflect not only the conditions of the usage environment such as the minimum bandwidth but also the conditions of the viewer himself, for example, such that the content designated by "R" is not displayed for minors. it can.
[0023]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram illustrating an example of a system configuration according to an embodiment of the present invention. The application node 1 in the present system is a device for running an application for content distribution. The attribute node 11 registers attribute data of the content in the copyright management platform 2. Comparing means 12 for comparing with the attribute data received from the management platform 2, and distribution determining means 13 for determining whether or not to distribute the content according to the comparison result by the comparing means 12.
[0024]
A first embodiment of the present invention will be described. For example, in the standardization specification cIDf1.1 established by the content ID forum, among the distribution attributes of the content ID shown in FIG. 11, the video bit rate (bit rate applicable to the video portion in the content) and the audio bit rate (content The bit rate applicable to the middle audio portion can be written.
[0025]
Here, FIG. 2 shows a registration sequence of the VOD content according to the first embodiment of the present invention. In the first embodiment of the present invention, when registering a VOD content, a video bit rate and an audio bit rate appropriate for reproducing the content from the application node 1 are written in S102 of FIG.
[0026]
The application node 1 acquires the downstream contract transmission bit rate of the end user terminal 5 and the transmission bit rate required for reproducing the content before the end user purchases the content, and can provide a service based on a comparison between the two. The end user terminal 5 is notified of whether or not this is the case. In FIG. 2, the sequence other than the sequence S102 is the same as the conventional registration sequence described with reference to FIG.
[0027]
Next, a purchase / viewing sequence for pay content according to the first embodiment of the present invention is shown in FIG. 3 and FIG. 3 shows an example where viewing is possible, and FIG. 4 shows an example where viewing is not possible. In FIG. 3, first, the end user terminal 5 notifies the application node 1 of the contract transmission bit rate or the effective transmission bit rate of the downstream end user terminal 5 (S500), and sends a content purchase request (S501). Upon receiving the purchase request from the end user terminal 5, the application node 1 notifies the copyright management platform 2 of the identification number of the content (S502).
[0028]
The copyright management platform 2 extracts a video bit rate and an audio bit rate suitable for reproducing the content from the attribute data 204, and sends a response to the application node 1 (S503). The application node 1 compares the downstream contract transmission bit rate of the end user terminal 5 with the transmission bit rate necessary for the content reproduction (S504), and determines that the downstream contract transmission bit rate of the end user terminal 5 is not required for the content reproduction. If the transmission bit rate is equal to or higher than the required transmission bit rate, a notification that the service can be provided is sent to the end user terminal 5 (S505).
[0029]
When the end user follows the terminal screen and acknowledges that charging may be performed upon purchase (S506), the application node 1 requests the charging settlement platform 3 for charging processing (S507). Then, charging processing is performed in the charging settlement platform 3 (S508).
[0030]
When the accounting processing result is notified from the accounting settlement platform 3 to the application node 1, the content contract data / use history 401 of the end user existing in the application node 1 is updated (S509). The billing result is displayed on the screen of the end user terminal 5 (S510).
[0031]
Next, when a viewing request is received from the end user (S511), the application node 1 notifies the URL of the meta file of the content to the end user terminal 5 (S512). Since the URL and the content type of the content are described in the metafile, the Web browser of the end user terminal 5 determines the playback player based on the content type and activates it (S513).
[0032]
When the end user terminal 5 makes a reproduction request to the URL of the distribution server of the media distribution platform 4 in which the content is stored (S514), the distribution server 206 of the media distribution platform 4 transmits the distribution content 206 to the end user terminal 5. It is transmitted as a video stream (S515).
[0033]
As shown by the dotted line in FIG. 4, if the result of the comparison judgment by the application node 1 (S504) indicates that the downlink contract transmission bit rate of the end user terminal 5 is lower than the transmission bit rate necessary for the content reproduction, Then, a notification that the service cannot be provided is sent to the end user terminal 5 (S516). In this case, the end user terminal 5 displays, for example, "The content cannot be sufficiently displayed at your downstream transmission bit rate" (S517).
[0034]
The difference between the purchase / viewing sequence for pay content according to the first embodiment of the present invention and the prior art described with reference to FIG. 12 is as follows.
[0035]
(1) When a content purchase request is received from the end user, the application node 1 notifies the copyright management platform (PF) 2 of the identification number of the content, and the copyright management platform 2 transmits the attribute data (PF The video bit rate and the audio bit rate which are components of the distribution attribute in the basic configuration of the content ID shown in FIG. 11 are extracted from the (unique) 204, and the result is returned to the application node 1 (S502, S503).
[0036]
(2) In the application node 1, in the purchase request, the contract data transmission speed downstream from the end user terminal 5, the effective transmission speed between the end user terminal 5 and the access point, or the reproduction capability of the end user terminal 5, or the like. The combination is notified (S500, S501). These pieces of information may be obtained not from the end user terminal 5 but from a network device to which the end user terminal 5 is connected.
[0037]
(3) The application node 1 determines the conditions of the distribution attributes (video bit rate, audio bit rate) obtained from the copyright management platform 2, the contract data transmission rate obtained from the end user terminal 5 or the network device, and the effective transmission. The environmental conditions such as the speed and the reproduction capability of the terminal are compared (S504).
[0038]
(4) If the condition is satisfied, the application node 1 notifies that the service can be provided (S505). If the conditions are not satisfied, a notification that the service cannot be provided is given (S516 in FIG. 4).
[0039]
FIG. 5 is a diagram showing a processing flow of the application node according to the first embodiment of the present invention. First, the contract transmission bit rate or the effective transmission bit rate of the downstream end user terminal 5 is received (step ST1), and at the same time, a purchase request is received from the end user terminal 5 (step ST2). When the purchase request is received, the identification number of the content is notified to the copyright management platform 2 (step ST3).
[0040]
Next, when a response to the transmission bit rate required for reproducing the content is received from the copyright management platform 2 (step ST4), the downlink contract transmission bit rate of the end user terminal 5 and the like are set to the transmission bit rate required for the content reproduction. It is determined whether the rate is equal to or higher than the rate (step ST5).
[0041]
If the downlink contract transmission bit rate or the like of the end user terminal 5 is equal to or higher than the transmission bit rate necessary for the content reproduction, the end user terminal 5 is notified that the service can be provided (step ST6). When there is a charge confirmation from the end user terminal 5 (step ST7), a charge processing request is made to the charge settlement platform 3 (step ST8).
[0042]
When receiving the charging processing result from the charging settlement platform 3 (step ST9), the charging result is displayed on the end user terminal 5 (step ST10). When a viewing request is received from the end user terminal 5 (step ST11), the content meta file is notified to the end user terminal 5 (step ST12), and the process ends.
[0043]
In the above step ST5, if the downlink contract transmission bit rate or the like of the end user terminal 5 is lower than the transmission bit rate necessary for the content reproduction, the end user terminal 5 is notified that the service cannot be provided (step ST13). The process ends.
[0044]
In the first embodiment, at the time of content registration in S101 of FIG. 2, contents of a plurality of permissible bit rates are registered for the same copyrighted work. It is also possible to deliver the content at a bit rate that matches the contracted transmission rate or the effective transmission rate received from the device, and if there is no match, notify that service cannot be provided and do not distribute the content. .
[0045]
Next, a second embodiment of the present invention will be described. For example, the standardized specification cIDf1.1 established by the content ID forum has a configuration in which the user restriction can be written in the usage conditions of the distribution attribute of the content ID shown in FIG. For example, “R” designation of video content corresponds to this.
[0046]
In the second embodiment of the present invention, when the VOD content is registered, “R” is written if there is a user restriction in reproducing the content from the application node 1 in S102 of FIG. Then, the application node 1 acquires the attribute (age) of the end user and the user restriction information of the content before the end user purchases the content, and determines whether the service can be provided based on the comparison between the two. To the end user terminal 5.
[0047]
FIGS. 6 and 7 show a purchase / viewing sequence for pay content according to the second embodiment of the present invention. 6 shows an example where viewing is possible, and FIG. 7 shows an example where viewing is not possible. In FIG. 6, first, the personal attribute (age) is input to the end user terminal 5, and the application node 1 is notified of the personal attribute (age) together with the purchase request (S700, S701). Upon receiving the purchase request from the end user terminal 5, the application node 1 notifies the copyright management platform 2 of the identification number of the content (S702).
[0048]
The copyright management platform 2 extracts the user restriction information of the content from the attribute data 204 and returns the user restriction information to the application node 1 (S703). The application node 1 compares the age input by the end user with the numerical value related to the user restriction information of the content (S704), and the age input by the end user is equal to or greater than the numerical value related to the user restriction information of the content. If it is, a notification that the service can be provided is sent to the end user terminal 5 (S705).
[0049]
When the end user follows the terminal screen and agrees that charging may be performed upon purchase (S706), the application node 1 requests the charging settlement platform 3 for charging processing (S707). Then, charging processing is performed in the charging settlement platform 3 (S708).
[0050]
When the accounting processing result is notified from the accounting settlement platform 3 to the application node 1, the content contract data / use history 401 of the end user existing in the application node 1 is updated (S709). The billing result is displayed on the screen of the end user terminal 5 (S710).
[0051]
Next, when a viewing request is received from the end user (S711), the application node 1 notifies the URL of the meta file of the content to the end user terminal 5 (S712). Since the URL and the content type of the content are described in the metafile, the Web browser of the end user terminal 5 determines the playback player based on the content type and activates the player (S713).
[0052]
When the end user terminal 5 issues a reproduction request to the URL of the distribution server of the media distribution platform 4 in which the content is accommodated (S714), the distribution server 206 of the media distribution platform 4 sends the distribution content 206 to the end user terminal 5. It is transmitted as a video stream (S715).
[0053]
As shown by the dotted line in FIG. 7, when the comparison result by the application node 1 indicates that the age input by the end user is smaller than the numerical value related to the user restriction information of the content, the end user terminal 5 A notification that the service cannot be provided is issued (S716). In this case, for example, "Your age cannot display content sufficiently." Is displayed on the end user terminal 5 (S717).
[0054]
The difference between the above-described pay content purchase / viewing sequence according to the second embodiment of the present invention and the prior art described with reference to FIG. 12 is as follows.
[0055]
(1) When the end user issues a content purchase request, the copyright management platform 2 notifies the copyright management platform 2 of the identification number of the content. A user restriction which is a component of the distribution attribute in the basic configuration of the content ID No. 11 is extracted, and the result is returned to the application node 1 (S702, S703).
[0056]
(2) In the application node 1, user information such as age and access area is notified from the end user terminal 5 in the purchase request (S700, S701). These pieces of information may be obtained not from the end user terminal 5 but from a network device to which the end user terminal 5 is connected.
[0057]
(3) The application node 1 transmits the conditions of the distribution attribute (user restriction) obtained from the copyright management platform 2 and the user information such as the age and access area obtained from the end user terminal 5 or the network device. A comparison is made (S704). As the user restriction, there is a so-called “R” designation. For example, in the case of R-15, a person under the age of 15 is not allowed to view the content. Therefore, if the input age is 14 and the value written in the user restriction is R-15, the content cannot be viewed.
[0058]
(4) If the condition is satisfied, a notification that the service can be provided is sent (S705). If the conditions are not satisfied, a notification that the service cannot be provided is issued (S716 in FIG. 7).
[0059]
FIG. 8 is a diagram showing a processing flow of the application node according to the second embodiment of the present invention. First, the personal attribute (age) and the content purchase request are received from the end user terminal 5 (steps ST21 and ST22). When the purchase request is received from the end user terminal 5, the identification number of the content is notified to the copyright management platform 2 (step ST23).
[0060]
When the user restriction information of the content is received from the copyright management platform 2 (step ST24), it is determined whether or not the age input by the end user is equal to or larger than the numerical value related to the user restriction information of the content (step ST25). .
[0061]
If the age entered by the end user is equal to or greater than the numerical value related to the user restriction information of the content, the end user is notified that the service can be provided to the end user terminal 5 (step ST26). When there is a charge confirmation from the end user terminal 5 (step ST27), a charge processing request is made to the charge settlement platform 3 (step ST28).
[0062]
When the accounting processing result is received from the accounting settlement platform 3 (step ST29), the accounting result is displayed on the end user terminal 5 (step ST30). When a viewing request is received from the end user terminal 5 (step ST31), the content meta file is notified to the end user terminal 5 (step ST32), and the process ends.
[0063]
If it is determined in step ST25 that the age input by the end user is smaller than the numerical value related to the user restriction information of the content, a notification that the service cannot be provided is sent to the end user terminal 5 (step ST33), and the processing is performed. finish.
[0064]
【The invention's effect】
With the above configuration, if the contracted transmission bit rate or effective transmission speed of the user terminal is not in a band sufficient for content reproduction, the provision of the service can be stopped, and the content creator intends to distribute the content. Can be reflected. Furthermore, not only the condition of the usage environment such as the minimum bandwidth, but also the condition of the viewer itself can be reflected, such as the case where the content designated by "R" is not shown for minors.
[Brief description of the drawings]
FIG. 1 is a diagram illustrating an example of a system configuration according to an embodiment of the present invention.
FIG. 2 is a diagram showing a registration sequence of VOD content.
FIG. 3 is a diagram showing a purchase / viewing sequence of pay content.
FIG. 4 is a diagram showing a purchase / viewing sequence of paid content.
FIG. 5 is a diagram showing a processing flow of an application node.
FIG. 6 is a diagram showing a purchase / viewing sequence of pay content.
FIG. 7 is a diagram showing a purchase / viewing sequence of paid content.
FIG. 8 is a diagram showing a processing flow of an application node.
FIG. 9 is a diagram showing a conventional system configuration.
FIG. 10 is a diagram showing a content registration sequence.
FIG. 11 is a diagram showing a basic configuration of a content ID.
FIG. 12 is a diagram showing a conventional purchase / viewing sequence for pay content.
[Explanation of symbols]
1 application node
2 Copyright Management Platform
3 Payment settlement platform
4 Media distribution platform
5 End user terminal
6 Operator terminal
7 Network
8 Video cassette tape
9 Encoding conversion device
11 Attribute data registration means
12 Comparison means
13 Delivery decision means
201 Registered Content
202 Attribute data
203 Original Content
204 Attribute data
205 protected content
206 Content for distribution
401 Content contract data and usage history

Claims (8)

A content delivery method for delivering content via a network,
Paying out a content ID when registering the content to be distributed, and registering the attribute data of the content in the copyright management platform;
When a user makes a content purchase request, the application node compares information obtained from the user terminal with attribute data obtained from the copyright management platform;
A step of the application node deciding whether or not to distribute the content according to the comparison result. A content delivery method for delivering content via a network,
When registering the content to be distributed, register the content with multiple allowable bit rates for the same copyrighted work,
When a purchase request is received from a user, the content is delivered at a bit rate that matches the contract transmission rate or the effective transmission rate obtained from the user terminal or network device. If there is no match, the content is not delivered. Content distribution method characterized by the following. The content distribution method according to claim 1,
The application node permits distribution of the content if the contract transmission speed or the effective transmission speed obtained from the user terminal or the network device is equal to or higher than the transmission speed necessary for reproducing the content obtained from the copyright management platform. A method of distributing the content if the contract transmission speed or the effective transmission speed obtained from the terminal or the network device is lower than the transmission speed necessary for reproducing the content obtained from the copyright management platform; . The content distribution method according to claim 1,
In the step of registering the attribute data of the content in the copyright management platform, registering the user restriction information of the content as attribute data in the copyright management platform;
In the step of comparing the information obtained from the user terminal with the attribute data obtained from the copyright management platform, the application node includes the step of: And the user restriction information obtained from the copyright management platform,
In the step of deciding whether or not distribution of the content is possible according to the comparison result, distribution of the content is permitted when the user information is out of a restricted range related to the user restriction information, and the user information is determined by the user information. A content distribution method, characterized in that content distribution is not permitted when the content is within a restriction range related to restriction information. A content distribution device that distributes content via a network,
Attribute data registration means for registering the attribute data of the content to the copyright management platform when registering the content to be distributed;
Comparing means for comparing information obtained from the user terminal with attribute data obtained from the copyright management platform when a content purchase request is made by the user;
A content distribution apparatus, comprising: distribution determination means for determining whether content can be distributed according to the comparison result. A content distribution device that distributes content via a network,
Means for registering content having a plurality of allowable bit rates for the same copyrighted work when registering the content to be distributed;
Distribution of content at a bit rate that matches the contracted transmission rate or effective transmission rate obtained from the user terminal or network device when a user makes a purchase request, and does not distribute the content if there is no match. A content distribution device comprising: a determination unit. The content distribution device according to claim 5,
The comparing means compares a contract transmission speed or an effective transmission speed obtained from a user terminal or a network device with a transmission speed required for reproducing the content obtained from a copyright management platform,
The distribution deciding means permits the distribution of the content when the contract transmission speed or the effective transmission speed obtained from the user terminal or the network device is higher than the transmission speed necessary for reproducing the content obtained from the copyright management platform. A content distribution device that does not permit distribution of the content if the contract transmission speed or the effective transmission speed obtained from the terminal or the network device is lower than the transmission speed required for reproducing the content obtained from the copyright management platform. . The content distribution device according to claim 5,
The attribute data registering means registers the user restriction information of the content as attribute data in a copyright management platform,
The comparing means compares user information such as age and access area of a user input from a user terminal or a network device with the user restriction information obtained from a copyright management platform,
The distribution determining means permits the distribution of the content when the user information is out of the restricted range related to the user restriction information, and when the user information is out of the restricted range related to the user restricted information, A content distribution device that does not permit distribution of content.

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