JP2010086352A - Content transmission/reception system, content transmission server and content reception device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To exclude a harmful content wherein taste of a user is considered out of contents transmitted to a reception terminal from a content transmission server. <P>SOLUTION: This content transmission/reception system 1 comprises the reception terminal 2 and the transmission server 4. The transmission server 4 stores content information notified that it is harmful from the reception terminal 2, and sets a harmful level according to the number of the notifications. When the content notified that it is harmful is included in the contents collected from a network, harmful level-equipped content information is transmitted. The reception terminal 2 notifies the transmission server 4 about a collection request and the harmful notification, and stores the content information to be performed with the harmful notification in its own device. Only the content information not corresponding to the harmful content stored in the own device but corresponding to the harmful level wherein recommendation is permitted out of the content information received from the transmission server 4 is reproducibly outputted to a recommendation list screen. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a content transmission / reception system including a transmission server for transmitting content and a reception terminal capable of transmitting / receiving desired content from this server.

  With the spread of the broadband environment, a large number of video distribution services are provided. Among the enormous contents, there are so-called harmful contents that have moral problems, and there are concerns about adverse effects on youth. Companies need to maintain a filtering and checking system as a countermeasure against harmful content. Countermeasures based on character information can be automated using filtering software. On the other hand, since video content must be viewed once, a manual check system is required.

For example, Patent Document 1 discloses a content distribution system in which a preference correlation database is updated based on information fed back by a user from a terminal installed in a rental car and distributed to subsequent rental cars.
JP2008-97449 (page 23, FIG. 8)

  There are various requests from viewers of content, and in the above-described distribution system, there is a possibility that even a content that does not match each user's preference may be displayed. That is, it is often necessary to consider that filtering can be finely set for each user.

  Accordingly, the present invention has been made to solve the above-described problems, and an object thereof is to exclude harmful contents in consideration of user preferences.

  In order to achieve the above object, a content transmission / reception system according to the present invention transmits a requested content via a network, and requests the transmission server to transmit desired content via the network. A content transmission / reception system configured with a possible receiving terminal, wherein the transmission server includes a first transmission means for transmitting content identification information corresponding to the received content recommendation request to the receiving terminal, and one content 1st list creating means for storing the content identification information and the number of receptions of the notification in association with each other when the notification that the content is harmful is received, and the first list creating means When executing the determination means for determining the harmful level according to the number of times of receiving the notification and the first transmission means, the determination First notifying means for notifying the receiving terminal together with the harmful level determined by the means, wherein the receiving terminal transmits the content recommendation request to the transmitting server; Second notification means for notifying the transmission server that the content is harmful, second list creation means for storing identification information of the content to be notified when the second notification means is executed, The first notification corresponding to the content when the identification information of the content received from the transmission server by the first transmission means does not exist in the information stored by the second list creation means Recommendation list output means for outputting the content so as to be reproducible when the harmful level notified by the means is a predetermined level predetermined by the receiving terminal. It is characterized in that was example.

  The content transmission server according to the present invention is a content transmission server that transmits the content requested from the content reception device to the content reception device via a network, and receives the content recommendation request sent by the content reception device. When receiving a notification that the content is harmful, a transmission unit that transmits identification information of the content corresponding to the content recommendation request received by the reception unit, and a content that is harmful to one content. List creation means for associating content identification information with the number of times of reception of this notification and storing it in its own device, and discrimination for determining the harmful level according to the number of times of reception of the content notification stored by the list creation means And the harmful means determined by the determining means when executing the transmitting means It is characterized by having a notification unit for notifying the receiving terminal together bell.

  The content receiving apparatus according to the present invention includes: a first receiving unit that receives content identification information from a transmission server; and the first receiving unit that receives the content identification information from the transmission server. First notification means for receiving notification of harmful level of content, transmission means for transmitting a content recommendation request to the transmission server, and second notification means for notifying the transmission server that one content is harmful When the second notification means is executed, the list creation means for storing the identification information of the content to be notified, and the content identification information received by the first reception means are obtained by the list creation means. The harmful level notified by the first notification means corresponding to the content is not self-existing and is not automatically stored. A recommendation list output means for outputting the content in a reproducible manner at a predetermined level determined in advance by the device; and the content that is output in a reproducible manner by the recommendation list output means via a network. 2 receiving means.

  ADVANTAGE OF THE INVENTION According to this invention, the harmful content in which the user preference was considered among the content transmitted to a receiving terminal from a content transmission server can be excluded.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS.

(Embodiment)
FIG. 1 is a diagram illustrating a hardware configuration of a content transmission / reception system 1 according to the present embodiment. FIG. 1 shows an example of a hardware configuration for exhibiting the functions of FIG. 2 described later. The content transmission / reception system 1 mainly includes a reception terminal 2, a communication network 3, a transmission server 4, a remote controller 5, and a TV antenna 6.

  The receiving terminal 2 is connected to the transmission server 4 via the communication network 3. The receiving terminal 2 includes a remote controller 5 that can communicate wirelessly and a TV antenna 6 that receives content broadcast on radio waves.

  The receiving terminal 2 includes a CPU (Central Processing Unit) 11, a ROM (Read Only Memory) 12, a RAM (Random Access Memory) 13, a communication I / F (Interface) 14, a hard disk 15, and a video / audio output device 16. And a remote controller I / F (Interface) 17 and a TV tuner 18. Each element is connected to the bus B.

  The CPU 11 is a central processing unit that executes instructions of a control program that realizes each function.

  The ROM 12 is a storage device that stores various programs.

  The RAM 13 is a storage device that develops various programs.

  The communication I / F 14 mediates data exchange between the transmission server 4 and the receiving terminal 2 via the communication network 3.

  The hard disk 15 is a main storage device that stores contents and the like.

  The video / audio output device 16 is composed of an LCD (Liquid Crystal Display) or the like, and displays the content instructed to be reproduced.

  The remote control I / F 17 receives various commands from the remote control 5 and transmits the operation contents to each hardware.

  The bus B is a transmission path that connects each hardware configuration.

  The TV tuner 18 is connected to the external TV antenna 6 and receives content or the like broadcast from a television broadcasting station.

  In the present embodiment, the content transmission / reception system 1 includes the receiving terminal 2, the communication network 3, the transmission server 4, the remote controller 5, and the TV antenna 6. However, the present invention is not necessarily limited thereto. For example, a configuration not including the remote controller 5 and the TV antenna 6 may be used. When the remote control 5 is not included in the content transmission / reception system 1, the receiving terminal 2 may be operated by the operating device provided in the receiving terminal 2 without being operated wirelessly by the remote control 5. . In the case where the TV antenna 6 is not included in the content transmission / reception system 1, the content supplied from the television broadcasting station may be received via the communication network 3. The receiving terminal 2 does not necessarily include the video / audio output device 16, and the video / audio output device may be connected to the outside.

  Next, the content transmission / reception system 1 in this Embodiment is demonstrated using FIG. FIG. 2 is a functional block diagram of the content transmission / reception system 1 in the present embodiment.

  First, the function of the transmission server 4 will be described.

  The transmission server 4 has a content management unit 30. The content management unit 30 receives a notification of a content recommendation request according to the present invention from the notification unit 29 in the receiving terminal 2. Further, the content management unit 30 receives a notification that the content is harmful. Content is collected from the network based on the notification of the content recommendation request, and the content information is transmitted to the receiving terminal 2 in accordance with a transmission procedure described later. This corresponds to the first transmission means according to the present invention. Further, the content notified of the harmful content is stored in the first harmful content list A in association with the harmful notification frequency α. This corresponds to the first list creation means according to the present invention. Further, the content management unit 30 sets the harmful level of the content based on the number of times of notification that it is harmful (the number of harmful notifications α). This corresponds to the discrimination means according to the present invention.

  The creation of the first harmful content list A and the setting of the harmful level of content in the content management unit 30 will be described with reference to FIG. FIG. 3 is a flowchart showing a procedure for creating the first harmful content list A and setting the harmful level of content in the present embodiment.

  First, the content management unit 30 determines whether or not a notification that the viewed content is harmful is received from the notification unit 29 (step S11). As a result, when it is determined that the notification of harmful is not received (No in step S11), the subsequent processing is not performed until it is determined that the notification of the fact is received.

  On the other hand, when it is determined that a notification that it is harmful has been received (Yes in step S11), the content management unit 30 is a new (not notified in advance) harmful content. Whether or not (step S12). The content is identified by the file name or path of the content. As a result, when it is determined that the content is new harmful content (Yes in Step S12), the content information is stored in the content management unit 30 as the first harmful content list A (Step S13). Next, the count of the number of notifications indicating that the content is harmful (the number of harmful notifications α) is stored as one (step S14).

  On the other hand, when it is determined that the content is not new harmful content (No in step S12), the count of the harmful notification count α is increased by 1 and this count is updated and stored (step S14). Next, a harmful level is determined by comparing with a threshold value for the number of harmful notifications α stored in advance (step S15). Here, as an example, a case where three harmful levels of high (step S16), medium (step S17), and low (step S18) are set is described.

  If it is determined in step S15 that the harmful notification count α is equal to or higher than the high level threshold, the harmful level of the content is set to “high” (step S16). If it is determined that the number of harmful notifications α is equal to or greater than the medium level threshold and less than the high level threshold, the harmful level of the content is set to “medium” (step S17). Similarly, if it is determined that the number of harmful notifications α is equal to or greater than the low level threshold and less than the medium level threshold, the harmful level of the content is set to “low” (step S18).

  The threshold for determining the harmful level can be changed by the administrator of the transmission server 4 in consideration of the harmful notification frequency α. In addition, the threshold for setting the harmful level may be changed for each collection source of content on the net. That is, a high threshold may be set for content from a content distribution site with high reliability, that is, less harmful content, and a low threshold may be set for content from a content distribution site with low reliability. . As a result, harmful content leveling is performed more accurately and harmful content exclusion is effectively achieved.

  FIG. 4 is an example of a conceptual diagram of the first harmful content list A in the content management unit 30 in the present embodiment. The title name, the playback time, the file name, and the harmful level set by the threshold value of the content notified as harmful content are stored in association with each other. In FIG. 4, for example, the title name “Animation” has a playback time of 36 minutes, has a file name “AAA.wmv”, and is managed to have a harmful level of “high”. Note that the first harmful content list A in the content management unit 30 is not limited to this form, and it is sufficient that the content and the harmful level correspond to each other.

  Next, the content transmission operation performed by the content management unit 30 will be described with reference to FIG. This corresponds to the first transmission means according to the present invention. FIG. 5 is a flowchart showing the procedure of the content transmission operation of the content management unit 30 in the present embodiment.

  First, the content management unit 30 determines whether a notification of a content recommendation request has been received from the notification unit 29 (step S21). As a result, when it is determined that the content recommendation request notification has not been received (No in step S21), the subsequent processing is not performed until it is determined that the content recommendation request notification has been received.

  On the other hand, if it is determined that a notification of a content recommendation request has been received (Yes in step S21), the content management unit 30 then collects content corresponding to the content recommendation request from the network (step S22). The content recommendation request according to the present invention includes information for instructing content collection and content information serving as a reference for content collection. The content information serving as a reference for content collection includes, for example, metadata indicating the title, performer, genre, and the like of the content currently being viewed by the user. Therefore, if content is collected based on the metadata of the content currently being viewed, content related to the title of the content being viewed, other content in which the performer appears, or content of the same genre Are collected.

  In addition, as content information serving as a reference for content collection, there is also preference information such as user viewing history and settings related to viewing. That is, the content that is expected to meet the user's preference based on the user's viewing history is collected. In addition, the user may set a genre, a performer, an image, and the like, and collect content that suits the taste.

  Next, the content management unit 30 determines whether content stored in the first harmful content list A is included among the content collected from the network (step S23). As a result, when it is determined that the content stored in the first harmful content list A is included (Yes in step S23), a harmful level is added to the content information (step S24), and the harmful level is attached. The content information is transmitted to the receiving terminal 2 (step S25). Steps S24 and S25 correspond to the first notification means according to the present invention.

  On the other hand, if the collected content is content that is not stored in the first harmful content list A (No in step S23), only the content information is transmitted to the receiving terminal 2 (step S25). Note that content (denoted as “−”) for which no harmful level is set because the harmful notification count α is zero or less than the threshold for setting the harmful level may be configured to be transmitted to the receiving terminal 2. .

  FIG. 6 is an example of content information to be transmitted to the receiving terminal 2 in the present embodiment. In FIG. 6, for example, the content whose title name is “Variety”, “Fight night” or the like is notified as harmful, and the number of harmful notifications α is not less than the low level threshold and less than the medium level threshold. Hazard level is set to “low”. Similarly, the content name such as “Movie” or “Music” is notified that the content is harmful, and the harmful level is not less than the middle level threshold and less than the high level threshold because the harmful frequency is α. “Medium” is set. In the same manner, the content name such as “Animation”, “Document” is notified that the content is harmful, and the harmful level is set to “high” because the number of harmful notifications α is equal to or higher than the high level threshold. ing. On the other hand, content whose title name is “News”, “Baseball”, etc. with a harmful level of “−” indicates that the harmful notification frequency α is zero or the harmful notification frequency α is less than the low level threshold. Therefore, no harmful level is set.

  Next, the function of the receiving terminal 2 is demonstrated using FIG.

  The receiving terminal 2 includes a communication I / F 14, a video / audio output device 16, a remote control I / F 17, a content receiving unit 21, a content determination unit 22, a content storage unit 23, a control unit 24, and an audio decoder unit 25. A video decoder unit 26, a recommendation screen generation unit 27, a video renderer unit 28, and a notification unit 29.

  As described above, the communication I / F 14 mediates exchange of data such as content between the content management unit 30 and the content reception unit 21 via the communication network 3.

  The content receiving unit 21 receives the content transmitted from the communication I / F 14 and transfers it to the content determination unit 22.

  As described above, the remote control I / F 17 receives the command by operating the remote control 5 and transfers the processing content indicated by the command to the control unit 24.

  The control unit 24 controls each unit based on the processing contents of various operations from the remote control I / F 17. When there is a content recommendation request, harmful content notification, and harmful level setting or change, the notification unit 29 is instructed. When content reproduction is instructed, the content stored from the content storage unit 23 is transferred to the audio decoder unit 25, the video decoder unit 26, and the recommended screen generation unit 27 for each data, and the video / audio output device 16 Perform playback display. Further, the audio decoder unit 25 and the video decoder unit 26 are instructed to decode various data, and the recommendation screen generation unit 27 is instructed to generate a recommendation screen. In the reproduction, when a command relating to the adjustment of the video and audio and the recommended screen is received, the audio decoder unit 25, the video decoder unit 26, and the recommended screen generation unit 27 are controlled.

  The content determination unit 22 performs filtering twice to exclude harmful content from the content information received from the content reception unit 21 according to a procedure described later. In performing the filtering, the content determination unit 22 receives the notification of harmful content from the notification unit 29 and stores it as the second harmful content list B. The role of the content determination unit 22 corresponds to the second list creation means of the present invention.

  FIG. 8 is an example of a conceptual diagram of the second harmful content list B in the content determination unit 22 in the present embodiment. Contents with title names “Variety”, “Fight night”, “Music”, and “Live” that are deemed harmful by viewing are stored in the second harmful content list B.

  Further, when performing filtering, a harmful level for which recommendation is permitted is stored in the content determination unit 22. FIG. 9 is an example of a conceptual diagram of management of harmful levels permitting recommendation in the present embodiment. According to the example of FIG. 9, the recommendation permission setting for content whose harmful level is set to “high” is OFF. That is, content with a harmful level of “high” is not recommended (output to the user) in the receiving terminal 2. In addition, the recommendation permission setting for content whose harmful level is set to “medium”, “low”, and “−” is ON. That is, the content having harmful levels of “medium”, “low”, and “−” permits recommendation at the receiving terminal 2. This harmful level setting may be configured to be set uniformly in the receiving terminal 2, or may be configured to be set individually by the logged-in user.

  The content storage unit 23 stores content information that has been determined not to be harmful content by filtering twice in the content determination unit 22 described later.

  The audio decoder unit 25 decodes the audio data of the content data.

  The video decoder unit 26 decodes the video data of the content data.

  The recommendation screen generation unit 27 reads the content information from the content storage unit 23 and presents the content information collected on the network to the user on the recommendation list screen.

  The video renderer 28 multiplexes the data output from the video decoder 26 and the recommended screen generator 27.

  The video / audio output device 16 displays the content recommendation list screen requested for reproduction. Further, when playback is selected on the content recommendation list screen, content playback is performed. As described above, the audio video output device 16 may be configured to be connected externally.

  The notification unit 29 receives various instructions from the control unit 24 and notifies the content determination unit 22 and the content management unit 30. When a content recommendation request is received, a content collection instruction and content information serving as a content collection reference are transmitted to the content management unit 30.

This corresponds to the second transmission means according to the present invention. When a notification of harmful content is received, a harmful notification is sent to the content management unit 30, which corresponds to the second notification means according to the present invention. When harmful information is sent and content information regarded as harmful is stored as a second harmful content list B in its own device, harmful content information is transmitted to the content determination unit 22. In addition, when instructing to set or change the harmful level for which recommendation is permitted, the content determination unit 22 is notified.

  Next, a procedure for excluding harmful contents when a content recommendation request is received will be described with reference to FIG. FIG. 7 is a flowchart of the filtering procedure in the content determination unit 22 in the present embodiment. The procedure of this flowchart corresponds to the recommendation list output means according to the present invention.

  First, it is determined whether or not the notification unit 29 of the receiving terminal 2 has received a content recommendation request from the remote control I / F 17 (step S31). As a result, when the notification unit 29 determines that the content recommendation request has not been received (No in step S31), the subsequent processing is not performed until it is determined that the content recommendation request has been received.

  On the other hand, if it is determined that a content recommendation request has been received (Yes in step S31), it is then determined whether or not the content receiving unit 21 has received content information from the communication I / F 14 (step S32). As a result, when it is determined that the content information has not been received (No in step S32), the subsequent processing is not performed until it is determined that the content information has been received.

  On the other hand, if it is determined that the content information has been received (Yes in step S32), the content determination unit 22 determines whether the content information matches the content information stored as the second harmful content list B (step S32). S33). This step S33 corresponds to the first filtering.

  As a result, when it is determined that the content matches the content information stored in the second harmful content list B (Yes in step S33), the content information is deleted without being stored. Alternatively, it may not be output on the content recommendation list screen in step S36.

  For example, a case will be described as an example in which the content information corresponding to FIG. 6 is received in step S32 and the receiving terminal 2 stores the second harmful content list B shown in FIG. In the received content information (corresponding to FIG. 6), the content information whose title names correspond to the content of FIG. 8 are “Variety”, “Fight night”, “Music” and “Live” is deleted or output to the content recommendation list screen do not do.

  On the other hand, when it is determined that the content information does not match the content information stored in the second harmful content list B (No in step S33), the content determination unit 22 next determines the harmful level of the content information and the content determination unit. It is determined whether or not the harmful level permitting recommendation stored in 22 matches (step S34). This step S34 corresponds to the second filtering.

  As a result, when it is determined that the content information does not match the harmful level for which recommendation is permitted (No in step S34), the content information is not stored and is not deleted or output to the content recommendation list. For example, when the receiving terminal 2 is set with the contents shown in FIG. 9, the harmful levels for which recommendation is permitted in the receiving terminal 2 are “medium”, “low”, and “−”, and therefore “high”. Content information whose title names are “Animation” and “Document” are deleted or not output to the content recommendation list screen.

  On the other hand, if it is determined that the content information matches the harmful level for which recommendation is permitted (Yes in step S34), the content information is stored in the content storage unit 23 (step S35).

  A recommendation list screen is generated for the content information stored in the recommendation screen generation unit 27, and content recommendation is realized for the user (step S36). FIG. 10 is a display example of a content recommendation list screen in the present embodiment. FIG. 10 shows that when the content information corresponding to FIG. 6 is received in step S32, the receiving terminal 2 stores the second harmful content list B shown in FIG. The processing results when the levels are “medium”, “low”, and “−” are shown.

  The user selects content desired to be viewed from the content information displayed on the recommendation list screen. When a playback button is selected in the selected content, downloading or streaming of the video data of the content corresponding to the content information is started and played back. If the content is considered harmful after viewing, a notification button is selected and the transmission server 4 is notified. Also, content that has been viewed before or content information that is determined not to be viewed from the title name may be deleted from the recommended candidates or not output to the recommendation list by selecting a delete button.

  Even if the harmful level corresponds to a level permitted by the first filtering in step S33 described above, the content is not recommended if it is regarded as harmful by viewing in the own device. For example, when the title name is “Live”, the harmful level set in the content management unit 30 is “−”, which corresponds to a level that allows recommendation, but is recommended once it is determined harmful by the own device. There is nothing. Similarly, when the title names are “Variety”, “Fight night”, and “Music”, the harmful level set in the content management unit 30 corresponds to the harmful level for which recommendation is permitted. Judgment is not recommended.

  As described above, in the transmission server 4, harmful content list management and harmful level setting are performed based on the harmful notification from each receiving terminal 2. In addition, each receiving terminal 2 can receive a harmful level set by centralized management by the transmission server 4, and filtering set by each receiving terminal 2 can be executed based on the harmful level. That is, by allowing the receiving terminal 2 to set a harmful level for which recommendation is permitted, exclusion of harmful content according to the user is realized. Furthermore, by providing a function for storing what is regarded as harmful among the contents viewed once at the receiving terminal 2, even if the harmful level permits recommendation, there is no possibility of becoming a recommendation candidate again, and it is more effective. Harmful content is excluded.

The figure which shows the hardware constitutions of the content transmission / reception system in this Embodiment. The functional block diagram of the content transmission / reception system in this Embodiment. The flowchart which showed the procedure of the 1st harmful content list | wrist A preparation in this Embodiment, and the setting of the harmful level of content. The example of the conceptual diagram of the 1st harmful content list | wrist A in the content management part in this Embodiment. The flowchart which showed the procedure of the content transmission operation | movement of the content management part in this Embodiment. The example of the content information transmitted to the receiving terminal in this Embodiment. The flowchart of the procedure of filtering in the content determination part in this Embodiment. The example of the conceptual diagram of the 2nd harmful content list | wrist B in the content determination part in this Embodiment. The example of the conceptual diagram of the management of the harmful level which permits the recommendation in this Embodiment. The example of a display of the content recommendation list screen in this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Content transmission / reception system 2 Reception terminal 3 Communication network 4 Transmission server 5 Remote control 6 TV antenna 11 CPU
12 ROM
13 RAM
14 Communication I / F
15 Hard disk 16 Video / audio output device 17 Remote control I / F
18 TV tuner 21 Content reception unit 22 Content determination unit 23 Content storage unit 24 Control unit 25 Audio decoder unit 26 Video decoder unit 27 Recommended screen generation unit 28 Video renderer unit 29 Notification unit 30 Content management unit

Claims (10)

A content transmission / reception system including a transmission server that transmits requested content via a network, and a receiving terminal that can request the transmission server to transmit desired content via the network,
The sending server is
First transmitting means for transmitting content identification information corresponding to the received content recommendation request to the receiving terminal;
First list creating means for storing the content identification information and the number of receptions of the notification in association with each other when a notification that the content of one content is harmful is received;
A discriminating unit for discriminating a harmful level according to the number of times of reception of the notification stored by the first list creating unit;
A first notifying unit that notifies the receiving terminal of the harmful level determined by the determining unit when executing the first transmitting unit;
The receiving terminal is
Second transmission means for transmitting the content recommendation request to the transmission server;
Second notification means for notifying the transmission server that the content of 1 is harmful;
Second list creating means for storing identification information of contents to be notified when the second notifying means is executed;
The first notification corresponding to the content when the identification information of the content received from the transmission server by the first transmission means does not exist in the information stored by the second list creation means A content transmission / reception system comprising: recommendation list output means for outputting the content in a reproducible manner when the harmful level notified by the means is a predetermined level predetermined by the receiving terminal.   The content transmission / reception system according to claim 1, wherein the content recommendation request includes content metadata or preference information.   The content transmission / reception system according to claim 2, wherein the harmful level in the determination unit is set in a stepwise manner in accordance with a range of the number of times the notification is received.   4. The content transmission / reception system according to claim 3, wherein the predetermined level in the recommendation list output means can set a plurality of harmful levels. A content transmission server that transmits content requested from a content reception device to the content reception device via a network,
Receiving means for receiving a content recommendation request sent by the content receiving device;
Transmitting means for transmitting content identification information corresponding to the content recommendation request received by the receiving means to the receiving terminal;
A list creating means for storing the identification information of the content and the number of reception times of the notification in association with each other when the notification that the content of one content is harmful is received;
A discriminating unit for discriminating a harmful level in accordance with the number of receptions of the notification of the content stored by the list creating unit;
A content transmission server comprising: a notification means for notifying the receiving terminal of the harmful level determined by the determination means when executing the transmission means.   The content transmission server according to claim 5, wherein the content recommendation request includes content metadata or preference information.   The content transmission server according to claim 6, wherein the harmful level in the determination unit is set stepwise according to a range of the number of times the notification is received. First receiving means for receiving content identification information from a transmission server;
A first notification means for receiving a harmful level notification of the content from the transmission server when receiving the identification information of the content by the first reception means;
Transmitting means for transmitting a content recommendation request to the transmission server;
Second notification means for notifying the transmission server that the content of 1 is harmful;
A list creating means for storing identification information of the content to be notified when executing the second notifying means;
The identification information of the content received by the first receiving means does not exist in the list stored by the list creating means, and the harmful information notified by the first notification means corresponding to the content A recommendation list output means for outputting the content in a reproducible manner when the level is a predetermined level predetermined by the own device;
Second receiving means for receiving the content output in a reproducible manner by the recommendation list output means via a network;
A content receiving apparatus comprising:   9. The content receiving apparatus according to claim 8, wherein the content recommendation request includes content metadata or preference information.   The content receiving apparatus according to claim 9, wherein a plurality of harmful levels can be set as the predetermined level in the recommendation list output unit.

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