JP2006014266A - Terminal apparatus for vod, data reproducing program, contents data distributing system, and server apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a terminal apparatus for VOD, a data-reproducing program, a contents data distributing system, and a server apparatus to make an effective VOD service possible reducing a traffic load, without being controlled by the number of a terminal apparatus. <P>SOLUTION: A receiving portion for receiving a file containing the contents data distributed from a contents outgoing apparatus with a broadcast type multi-address transmission system via a cable television network, a storage portion to store the file containing the received contents data, an input portion for generating an input signal by receiving an input operation by a user; and a reproduction portion for reproducing the contents data, based on the generated input signal are provided. The traffic load is reduced thereby and a system which is not controlled by the number of the terminal apparatus is constituted. The contents outgoing apparatus no longer needs to distribute the contents data, according to each user's request, and the effective service becomes possible. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a VOD terminal device, a data reproduction program, a content data distribution system, and a server device for reproducing content data transmitted by a broadcast type broadcast transmission method (push distribution).

  2. Description of the Related Art Conventionally, there are VOD (Video On Demand) service systems using a cable television network that provide content in a stream format by accessing a center server from each terminal. Such a VOD service system is constructed on the premise that the center server and the terminal have a bidirectional function capable of communicating through a cable television transmission line, and the terminal device is for viewing digital cable television broadcasting. STB equipment.

On the other hand, for example, Patent Document 1 proposes a system that stably distributes a large amount of data content by wireless broadcasting. In the system described in Patent Document 1, a broadcasting station adds link information to encrypted moving image content and transmits it, and a server holds an encryption key for decrypting the encrypted moving image content. Then, the television broadcast receiver accumulates the received encrypted moving image content and link information in the hard disk, acquires an encryption key from the server via the Internet based on the link information, and decrypts the encrypted moving image content.
JP 2004-179755 A

  However, in the VOD service system using the cable television network as described above, in order to provide the VOD service to one terminal on the user side, a part of the resources of the frequency resources of the transmission path and the equipment such as the center server is used. In order to occupy, the number of terminals that simultaneously provide services is limited. Furthermore, in addition to a general MOD (Movie On Demand) format VOD service that charges for each content, in particular, when performing a service in S-VOD (Subscription On Demand) or FOD (Free On Demand) format, The need to reduce the load increases, and it is necessary to widen the transmission path and increase the number of devices such as the center server.

  Even in a VOD service system using an IP network via broadband or an optical fiber network, there are similar problems with respect to the load on the center devices and the load on the network in simultaneous use from a plurality of terminals.

  In addition, the system described in Patent Document 1 has been proposed to use wireless broadcasting for data file distribution, but in this case, it can only be used in a certain band assigned by the radio wave administration. Various contents cannot be transmitted, and the above VOD service cannot be substantially realized.

  The present invention has been made in view of such circumstances, and a VOD terminal device and a data reproduction program that reduce the traffic load and enable an efficient VOD service without being restricted by the number of terminal devices. An object of the present invention is to provide a content data distribution system and a server device.

  (1) In order to achieve the above object, the VOD terminal device of the present invention receives a file containing content data distributed by a broadcast type broadcast transmission method from a content transmission device via a cable television network. A storage unit that stores a file including the received content data, an input unit that receives an input operation by a user and generates an input signal, and playback that plays back the content data based on the generated input signal And a section.

  In this way, the VOD terminal apparatus receives a file including content data distributed by the broadcast type broadcast transmission method. As a result, it is possible to reduce the traffic load on the content transmission device and construct a system that is not limited by the number of terminal devices. It is not necessary for the content transmission apparatus to distribute the content data in response to each user's request, thereby enabling an efficient service.

  Further, the VOD service can be used even by a user who does not have an environment capable of bidirectional communication. Even a user of an analog cable TV service that does not use a digital cable TV or a user who mainly receives a retransmission wave and does not install an STB device can use the VOD service. For example, there are cases where the external cable television transmission path is bidirectional, but the internal transmission path is not compatible with the bidirectional transmission, such as in the secondary side facilities in metropolitan areas, etc. Even in such a case, the VOD service can be provided to a user who is receiving a one-way service. In addition, users of analog cable TV services who do not use digital cable TV, or to receive cable TV services as a countermeasure against radio interference, or through the introduction of collective housing, are mainly receiving retransmitted waves. Although there are users who do not install STB (Set Top Box) devices for watching TV broadcasts, services can be provided to such users.

  Further, since the VOD terminal device receives a file distributed via a cable television network, the VOD terminal device has a wide usable frequency band and can be used for distribution of various contents.

  (2) Further, the VOD terminal device of the present invention includes an attribute information storage unit that stores user attribute information input from the input unit and information indicating the priority of the attribute information, and the stored user And a determination unit for determining whether or not to store the file including the received content data in the storage unit based on the attribute information and the information indicating the priority order of the attribute information.

  As described above, the VOD terminal device determines whether or not to store the file in the storage unit based on the user attribute information and the information indicating the priority order of the attribute information. Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. In addition, since user attribute information and the like are directly input from the input unit, they can be changed immediately when it is desired to change the settings.

  (3) Further, the VOD terminal device of the present invention includes a receiving unit that receives a file containing content data distributed from a content sending device by a multicast or broadcast type broadcast transmission method via a communication network; A storage unit that stores files including the content data, an input unit that receives an input operation by a user and generates an input signal, a playback unit that plays back the content data based on the generated input signal, and the input Based on the attribute information storage unit that stores the attribute information of the user input from the unit and information indicating the priority of the attribute information, and the stored attribute information of the user and the information indicating the priority of the attribute information, Determining whether to store the file containing the received content data in the storage unit When it is characterized in that it comprises.

  In this way, the VOD terminal apparatus receives a file including content data distributed by the broadcast type broadcast transmission method. As a result, it is possible to reduce the traffic load on the content transmission device and construct a system that is not limited by the number of terminal devices. It is not necessary for the content transmission apparatus to distribute the content data in response to each user's request, thereby enabling an efficient service.

  Further, the VOD terminal device determines whether or not to accumulate the file in the accumulation unit based on the user attribute information and information indicating the priority order of the attribute information. Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. In addition, since user attribute information and the like are directly input from the input unit, they can be changed immediately when it is desired to change the settings.

  (4) Further, the VOD terminal device of the present invention reads a history storage unit that stores the playback history information of the played content data, reads the stored playback history information, and reflects the playback history information. An attribute information changing unit that rewrites the attribute information of the user stored in the attribute information storage unit and information indicating the priority order of the attribute information is further provided.

  Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. In addition, it is possible to save the user from inputting user information by providing the system with a function of automatically recommending content according to the user's preference.

  (5) The VOD terminal device according to the present invention includes an attribute information storage unit that stores user attribute information received by the reception unit from the content transmission device and information indicating a priority order of the attribute information, and the storage. A determination unit that determines whether or not to store the file including the received content data in the storage unit based on the attribute information of the user and the information indicating the priority order of the attribute information. It is a feature.

  As described above, the VOD terminal device determines whether or not to store the file in the storage unit based on the user attribute information received from the content transmission device and the information indicating the priority order of the attribute information. Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. Settings corresponding to the function of the terminal device for VOD can also be reflected.

  (6) The VOD terminal device according to the present invention includes a receiving unit that receives a file including content data distributed by a broadcast type broadcast transmission method from a content transmission device via a communication network, and the received content A storage unit that stores files including data, an input unit that receives an input operation by a user and generates an input signal, a playback unit that plays back the content data based on the generated input signal, and the receiving unit An attribute information storage unit for storing user attribute information received from the content transmission device and information indicating the priority order of the attribute information, and the stored attribute information of the user and information indicating the priority order of the attribute information. Based on this, it is determined whether or not to store the file including the received content data in the storage unit. It is characterized by further comprising a section, a.

  In this way, the VOD terminal apparatus receives a file including content data distributed by the broadcast type broadcast transmission method. As a result, it is possible to reduce the traffic load on the server device and construct a system that is not limited by the number of terminal devices. There is no need for the server device to distribute the content data in response to each user's request, thereby enabling an efficient service.

  Further, the VOD terminal device determines whether to store the file in the storage unit based on the user attribute information received from the content transmission device and the information indicating the priority order of the attribute information. Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. Settings corresponding to the function of the terminal device for VOD can also be reflected.

  (7) In the VOD terminal device of the present invention, the storage unit is a hard disk drive.

  Thus, since the storage unit is a hard disk drive, a large capacity for storing content data can be secured, miniaturization is possible, and quick playback is possible. It is possible to manufacture a VOD terminal device that sufficiently meets user requirements at low cost.

  (8) A data reproduction program according to the present invention includes encrypted content data and decrypted data associated with the encrypted content data on a one-to-one basis. A data reproduction program distributed to the VOD terminal device and executed; a process of reading the encrypted content data; a process of decrypting the encrypted content data using the decrypted data; A series of processes including a process of reproducing the content data as an image or sound is read by a computer and converted into a command that can be executed.

  In this way, since the encrypted content data is decrypted using the decrypted data associated with the encrypted content data on a one-to-one basis, the encrypted content data is not associated with the decrypted data on a one-to-one basis. Content data is not decrypted. In addition, the encrypted content data is not decrypted with the decrypted data that does not correspond one-to-one with the encrypted content data. Therefore, by combining encrypted content data and a program as a data player that outputs the content data as an image or sound, it is possible to separate the two and play the content data on another data player It becomes impossible. Also, it becomes impossible to decrypt and reproduce other encrypted content data with the separated data player. As a result, security can be ensured. Then, by combining the content data and the data player to form an executable file, the user can download the executable file and output the content data as an image or sound. That is, a special data player for outputting the content data as an image or sound is not necessary.

  (9) Further, the data reproduction program of the present invention is based on a process of reading data relating to the use permission of the content data combined with the encrypted content data, and the read data relating to the use permission. And determining whether or not reproduction of the content data as an image or sound is permitted. If the result of the determination indicates that reproduction of the content data as an image or sound is permitted, the processing is performed. It is characterized by continuing, and if not permitted, the processing is stopped.

  As described above, since the data related to the use permission of the content data is combined with the encrypted content data, it is possible to securely execute the license agreement between the person who distributes the content data and the user. Become. That is, it is determined whether output of content data as an image or sound is permitted based on data relating to the license, and if the result of the determination is that output of content data as an image or sound is permitted Since the processing is continued and the processing is stopped when it is not permitted, it is possible to output the content data as an image or sound only to a user who is permitted to use. Note that the determination process can be performed using data relating to the license and authentication data input from outside the program. For example, it can be performed by inputting authentication data in a VOD terminal device executing the program. In addition, a so-called soft battery method may be adopted so that a program as a soft battery manager has authentication data and collates it with the data related to the above-mentioned license, and may perform a period restriction or a function restriction.

  (10) A data reproduction program of the present invention is a data reproduction program executed by any of the VOD terminal devices described above, and a process of reading content data from a storage unit of the VOD terminal device , A process for determining whether or not the reproduction of the content data is permitted based on the permission data input from the input unit of the VOD terminal device, and the reproduction of the content data is permitted as a result of the determination. If the content data is reproduced as an image or sound, and if the result of the determination is that the reproduction of the content data is not permitted, the computer reads a series of processes including: It is characterized by being commanded to be executable.

  As described above, the data reproduction program determines whether or not the reproduction of the content data is permitted based on the permission data input from the input unit, and if the reproduction is permitted, the content data is converted into an image or a sound. Play as. This makes it possible to prevent content data from being reproduced or copied without permission. It is also possible to construct a system that charges the user when transmitting the license data.

  (11) The data reproduction program of the present invention is a data reproduction program executed by any of the VOD terminal devices described above, wherein the first content data and the first content data are stored in the storage unit of the VOD terminal device. The content data of the second content data, and the first content data and the second content data are combined so that the second content data is reproduced before, during or after the reproduction of the first content data. Thus, a series of processes including a process for generating content data for reproduction and a process for reproducing the generated content data for reproduction are read by a computer and converted into commands that can be executed.

  As described above, the data reproduction program reproduces the second content data before, during or after the reproduction of the first content data. As a result, for example, when reproducing drama content, commercial content can be inserted and reproduced at an arbitrary timing.

  (12) Further, the DVD recorder, the television receiver, the VTR, or the digital tuner or other video or audio equipment or video or audio device according to the present invention incorporates the VOD terminal device described above. It is said.

  Thereby, since the apparatus is integrated, there is no need for an extra space, and the space can be used effectively. Further, it is not necessary to connect the VOD terminal device and the television receiver or the like by wiring, and the wiring can be simplified.

  (13) Also, the content data distribution system of the present invention is a VOD terminal device according to any one of claims 1 to 8, in a multicast or broadcast type broadcast transmission system from a content transmission device via a cable television network. On the other hand, it is characterized by delivering a file containing content data.

  As a result, it is possible to reduce the traffic load on the content transmission device and construct a system that is not limited by the number of terminal devices. It is not necessary for the content transmission apparatus to distribute the content data in response to each user's request, thereby enabling an efficient service.

  (14) Further, the server device of the present invention is connected to the content transmission device of the content data distribution system described above, and transmits permission data for permitting viewing of content in response to a user request via a communication network. A purchase history storage unit that stores the purchase history information of the content, as a server device that transmits to the device, and the purchase of the content related to the license data when the license data is transmitted; An attribute information changing unit that reflects the purchase history information, creates the attribute information of the user and information indicating the priority order of the attribute information, and transmits the information to the content transmission apparatus.

  As described above, the server device creates the attribute information of the user and the information indicating the priority order of the attribute information by reflecting the purchase history information of the content data. Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. Further, by providing the system with a function for automatically recommending content according to content purchase information, it is possible to save the user from inputting user information.

  According to the terminal device for VOD of the present invention, a file including content data distributed by a broadcast type broadcast transmission method is received. As a result, it is possible to reduce the traffic load on the content transmission device and construct a system that is not limited by the number of terminal devices. It is not necessary for the content transmission apparatus to distribute the content data in response to each user's request, thereby enabling an efficient service.

  Further, the VOD service can be used even by a user who does not have an environment capable of bidirectional communication. Even a user of an analog cable TV service that does not use a digital cable TV or a user who mainly receives a retransmission wave and does not install an STB device can use the VOD service. For example, there are cases where the external cable television transmission path is bidirectional, but the internal transmission path is not compatible with the bidirectional transmission, such as in the secondary side facilities in metropolitan areas, etc. Even in such a case, the VOD service can be provided to a user who is receiving a one-way service. In addition, users of analog cable TV services who do not use digital cable TV, or to receive cable TV services as a countermeasure against radio interference, or through the introduction of collective housing, are mainly receiving retransmitted waves. Although there are users who do not install STB (Set Top Box) devices for watching TV broadcasts, services can be provided to such users.

  Further, since the VOD terminal device receives a file distributed via a cable television network, the VOD terminal device has a wide usable frequency band and can be used for distribution of various contents.

  Further, according to the VOD terminal device of the present invention, it is determined whether or not the file is stored in the storage unit based on the attribute information of the user and the information indicating the priority order of the attribute information. Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. In addition, since user attribute information and the like are directly input from the input unit, they can be changed immediately when it is desired to change the settings.

  Also, according to the VOD terminal device of the present invention, it is possible to efficiently use the capacity of the storage unit and provide content according to the user's settings. In addition, it is possible to save the user from inputting user information by providing the system with a function of automatically recommending content according to the user's preference.

  Further, according to the VOD terminal device of the present invention, it is determined whether or not the file is stored in the storage unit based on the user attribute information received from the content transmission device and the information indicating the priority order of the attribute information. Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. Settings corresponding to the function of the terminal device for VOD can also be reflected.

  Further, according to the VOD terminal device of the present invention, since the storage unit is a hard disk drive, a large capacity for storing content data can be secured, miniaturization is possible, and quick playback is possible. Become. It is possible to manufacture a VOD terminal device that sufficiently meets user requirements at low cost.

  In addition, according to the data reproduction program of the present invention, the encrypted content data is decrypted using the decrypted data associated with the encrypted content data on a one-to-one basis. Encrypted content data that does not correspond to one is not decrypted. In addition, the encrypted content data is not decrypted with the decrypted data that does not correspond one-to-one with the encrypted content data. Therefore, by combining encrypted content data and a program as a data player that outputs the content data as an image or sound, it is possible to separate the two and play the content data on another data player It becomes impossible. Also, it becomes impossible to decrypt and reproduce other encrypted content data with the separated data player. As a result, security can be ensured. Then, by combining the content data and the data player to form an executable file, the user can download the executable file and output the content data as an image or sound. That is, a special data player for outputting the content data as an image or sound is not necessary.

  Further, according to the data reproduction program of the present invention, since the data relating to the use permission of the content data is combined with the encrypted content data, a license agreement is made between the person who distributes the content data and the user. It will be possible to implement it reliably. That is, it is determined whether output of content data as an image or sound is permitted based on data relating to the license, and if the result of the determination is that output of content data as an image or sound is permitted Since the processing is continued and the processing is stopped when it is not permitted, it is possible to output the content data as an image or sound only to a user who is permitted to use. Note that the determination process can be performed using data relating to the license and authentication data input from outside the program. For example, it can be performed by inputting authentication data in a VOD terminal device executing the program. In addition, a so-called soft battery method may be adopted so that a program as a soft battery manager has authentication data and collates it with the data related to the above-mentioned license, and may perform a period restriction or a function restriction.

  Further, according to the data reproduction program of the present invention, the data reproduction program determines whether or not reproduction of the content data is permitted based on the permission data input from the input unit, and the reproduction is permitted. In some cases, the content data is reproduced as an image or sound. This makes it possible to prevent content data from being reproduced or copied without permission. It is also possible to construct a system that charges the user when transmitting the license data.

  According to the data reproduction program of the present invention, the data reproduction program reproduces the second content data before, during or after the reproduction of the first content data. As a result, for example, when reproducing drama content, commercial content can be inserted and reproduced at an arbitrary timing.

  In addition, according to the DVD recorder, the television receiver, or the VTR or other video or audio equipment or video or audio device of the present invention, the device is integrated, so that no extra space is required, and the space is effectively used. Can be used. Further, it is not necessary to connect the VOD terminal device and the television receiver or the like by wiring, and the wiring can be simplified.

  Further, according to the content data distribution system of the present invention, it is possible to construct a system that reduces the traffic load on the content transmission device and is not limited by the number of terminal devices. It is not necessary for the content transmission apparatus to distribute the content data in response to each user's request, thereby enabling an efficient service.

  Further, according to the server device of the present invention, the user attribute information and the information indicating the priority order of the attribute information are created by reflecting the purchase history information of the content data. Thereby, the capacity | capacitance of a storage part can be utilized efficiently and the content according to a user's setting can be provided. In addition, by providing the system with a function for automatically recommending content according to content purchase information, it is possible to save the user from inputting user information.

  Next, embodiments of the present invention will be described with reference to the drawings. In addition, in order to facilitate understanding of the description, the same reference numerals are given to the same components in the respective drawings, and duplicate descriptions are omitted.

(Embodiment 1)
FIG. 1 is a configuration diagram of a content data distribution system 1. As shown in FIG. 1, the content data distribution system 1 includes a content transmission device 2, a VOD terminal device 3, a television receiver 4, a server device 5, and a communication terminal device 6. The content transmission device 2 is connected to the VOD terminal device 3 via a CATV (cable television) transmission path 7.

  As a result, the VOD service can be used even by a user who does not have an environment capable of bidirectional communication. Even a user of an analog cable TV service that does not use a digital cable TV or a user who mainly receives a retransmission wave and does not install an STB device can use the VOD service. For example, there are cases where the external cable television transmission path is bidirectional, but the internal transmission path is not compatible with the bidirectional transmission, such as in the secondary side facilities in metropolitan areas, etc. Even in such a case, the VOD service can be provided to a user who is receiving a one-way service. In addition, users of analog cable TV services who do not use digital cable TV, or to receive cable TV services as a countermeasure against radio interference, or through the introduction of collective housing, are mainly receiving retransmitted waves. Although there are users who do not install STB devices for watching TV broadcasts, services can be provided to such users. Further, since the VOD terminal device 3 receives a file distributed via the CATV transmission line 7, the usable frequency band is wide and can be used for distribution of various contents.

  The server device 5 is connected to the Internet 8, and the communication terminal device 6 can be connected to the Internet 8. The CATV transmission line 7 is a general cable television network. In the case of FTTH, in which everything from the content transmission device 2 to the VOD terminal device 3 is an optical fiber, in the case of an HFC that is a combination of an optical fiber and a coaxial cable, a coaxial cable is used. Any of them may be used.

  The content transmission device 2 transmits a file including content data by the broadcast type broadcast transmission system via the CATV transmission path 7. The broadcast-type broadcast transmission method refers to so-called push-type delivery, and means that a large number of files are transmitted to an unspecified terminal device in one direction at the same time. Thereby, the traffic load in the content transmission apparatus 2 can be reduced, and the system which does not receive the restriction | limiting of the number of terminal devices can be constructed | assembled. It is not necessary for the content transmission device 2 to distribute the content data in response to each user's request, thereby enabling an efficient service. The content transmission device 2 is provided, for example, inside a cable television broadcasting station, and distributes content data of a television program to the terminal device of each user of the cable television.

  FIG. 2 is a block diagram showing the configuration of the content transmission device 2. As shown in FIG. 2, the content transmission device 2 includes a control unit 11, a content archive server 12, an identification information storage unit 13, a content server 14, a distribution server 16, and an IP / QAM conversion unit 17. The control unit 11 comprehensively controls each component, and performs processing such as data input / output and data processing. For example, migration of content data from a storage medium (not shown) to the content archive server 12, reading of content data to be distributed from the content archive server 12, migration of content data to be distributed to the content server 14, and storage of identification information The processing of the control unit 11 includes reading of the identification information from the unit 13, creation of a data file performed by adding the identification information to the content data to be distributed, and transmission of the data file to the IP / QAM conversion unit.

  The content archive server 12 stores distributable content data. With respect to storage of content data, data transmitted using a terrestrial line or satellite line may be stored in the content archive server 12, or the content archive server may be stored from a physically distributed storage medium such as an HDD or DVD. 12 may be input. The identification information storage unit 13 stores identification information added to each piece of content data stored in the content archive server 12. The content server 14 stores content data to be distributed and a data file created by adding identification information to the content data to be distributed. The distribution server 16 stores a data file with header information added. The IP / QAM conversion unit 17 performs protocol analysis and QAM conversion. With QAM conversion, it is possible to divide information into a plurality of units in a certain unit and convert the modulation method into a method suitable for cable transmission before transmission. The above transmission method is an example, and the invention is not particularly limited by this.

  The VOD terminal device 3 stores therein a data file transmitted from the content transmission device 2 via the CATV transmission path 7 by the broadcast transmission method. When there is a user operation, the content is output to the television receiver 4.

  FIG. 3 is a block diagram illustrating a configuration of the VOD terminal device 3. As shown in FIG. 3, the VOD terminal device 3 generally includes a tuner unit 22, an input unit 26, an attribute storage unit 33, a history storage unit 34, a determination unit 40, a content storage unit 42, a viewing permission management unit 45, and transmission. The video program unit 47 and the content transmission unit 48 are included.

  The RF input unit 21 (receiving unit) is connected to the CATV transmission line 7 and inputs information transmitted via the CATV transmission line 7 therein. The tuner unit 22 includes a QAM / IP conversion unit 23 and a television tuner 24. The QAM / IP conversion unit 23 converts the input information from the QAM system and analyzes the protocol. The TV tuner 24 performs cable TV broadcast tuning. Note that the TV tuner 24 may be configured to tune BS broadcasting, CS broadcasting, and terrestrial broadcasting.

  The input unit 26 receives input of user attribute information, information indicating the priority order of attribute information, information for specifying content to be viewed, or viewing permission key (permission data) from the user. The input unit 26 includes an operation unit 27 and a remote control signal receiving unit 28. The operation unit 27 accepts manual input by the user, and the remote control signal receiving unit 28 receives a signal transmitted from the remote control. As described above, since the user attribute information and the like are directly input from the input unit, they can be changed immediately when it is desired to change the settings.

  The attribute storage unit 33 (attribute information storage unit) stores user attribute information input from the input unit 26 and information indicating the priority order of the attribute information. User attribute information is, for example, information on the type of content that the user wants to view, such as information on movies, sports, variety, news, etc. Information indicating the priority order of attribute information is, for example, movies with the highest priority Yes, it is information that sports, variety, and news will follow. The content sending device 2 accumulates and manages user attribute information and information indicating the priority order of the attribute information, and the user attribute information transmitted to the VOD terminal device 3 and the information indicating the priority order of the attribute information are attributed. It may be stored in the storage unit 33. Thereby, the capacity | capacitance of the content storage part 42 can be utilized efficiently, and the content according to a user's setting can be provided. Settings corresponding to the function of the terminal device for VOD can also be reflected.

  The history storage unit 34 stores reproduction history information that the user has played back the content. The control unit 35 performs control relating to input, storage of user attribute information in the attribute storage unit 33 and information indicating the priority order of the attribute information, storage of reproduction history information in the history storage unit 34, and the like. Further, the control unit 35 reads the reproduction history information as the attribute information changing unit, rewrites the user attribute information stored in the attribute information storage unit and the information indicating the priority order of the attribute information by reflecting the reproduction history information. Accordingly, the system can be provided with a function for automatically recommending content according to the user's preference, thereby saving the user from inputting user information.

  The determination unit 40 refers to the attribute storage unit 33, compares the attribute information of the user and information indicating the priority order of the attribute information with the content identification information of the file including the received content data, and stores the content information in the content storage unit 42. It is determined whether or not to accumulate. Thereby, the capacity | capacitance of the content storage part 42 can be utilized efficiently, and the content according to a user's setting can be provided.

  The criterion for determining whether or not to accumulate can be arbitrarily set. For example, when the remaining capacity of the content storage unit 42 is insufficient to store the received content data, it is determined whether the priority order of the content is below a certain order. It can be prevented from accumulating. In addition, for example, a criterion may be provided that the content data with the first priority overwrites the storage area for the third content data.

  The MPEG encoder 41 encodes the signal from the TV tuner 24 in the MPEG format. The content storage unit 42 (storage unit) stores content data. The content storage unit 42 is preferably a hard disk drive. When the content storage unit 42 is a hard disk drive, a large capacity for storing content data can be secured, miniaturization is possible, and quick playback is possible. In addition, the VOD terminal device 3 that sufficiently satisfies the user's request can be manufactured at low cost. In addition to the hard disk drive, a magneto-optical disk drive, a memory, or the like may be used. The storage area of the content storage unit 42 includes a user use area, a commercial storage area, a software / database storage area, and the like.

  The viewing permission management unit 45 performs management so as to instruct the program organization of the transmission video when the user is permitted for the content to be viewed, and not to instruct the program organization of the transmission video when the content is not permitted. To do. Specifically, when the user inputs a viewing permission key for the content to be viewed, the user is instructed to program the transmitted video. This makes it possible to prevent content data from being reproduced or copied without permission. In addition, it is possible to construct a system that charges the user when the viewing permission key is transmitted.

  The MPEG decoder 46 decodes MPEG format data stored in the content storage unit. The transmission video program unit 47 reads the content instructed by the viewing permission management unit 45 to organize the transmission video from the content storage unit 42, organizes the content data as a transmission video, and organizes the program.

  The content sending unit 48 (playing unit) sends the program-organized content data to the television receiver 4. The content transmission unit 48 includes a television signal output unit 49 inside, and the television signal output unit 49 internally transmits a television image signal directly to the television receiver 4. The television receiver 4 reproduces the content data input from the VOD terminal device 3 as an image or sound. It is also possible to watch cable TV programs being broadcast via the VOD terminal device 3.

  In the above aspect, the VOD terminal device 3 and the television receiver 4 are separated from each other. However, the VOD terminal device 3 may be incorporated in the television receiver 4, a DVD recorder, a VTR, or the like. Good. Thereby, since the apparatus is integrated, there is no need for an extra space, and the space can be used effectively. Further, it is not necessary to connect the VOD terminal device and the television receiver or the like by wiring, and the wiring can be simplified. The built-in target is not limited to the television receiver 4, DVD recorder, VTR, and the like, and the same applies to other video or audio equipment or video or audio equipment. Further, the VOD terminal device 3 may be provided with an external interface unit to enhance convenience.

  In response to a request from the communication terminal device 6, the server device 5 transmits a viewing permission key that enables viewing of the content selected by the user to the communication terminal device 6. The server device 5 is connected to the content transmission device 2 and can transmit and receive information to and from each other. The communication terminal device 6 is, for example, a PC or a mobile phone.

  FIG. 4 is a block diagram illustrating a configuration of the server device 5. The server device 5 includes a control unit 51, a transmission / reception unit 52, a permission key issuing unit 54, a DB server 55 (purchase history storage unit), a screen information storage unit 57, and a billing server 58. The control unit 51 controls the entire apparatus. The transmission / reception unit 52 is connected to the Internet 8 and transmits / receives information to / from the communication terminal device 6. When the permission key issuing unit 54 receives a request signal or mail requesting viewing of specific content from the communication terminal device 6, the permission key issuing unit 54 issues a viewing permission key and transmits it to the communication terminal device 6. When the permission key issuing unit 54 issues a viewing permission key, the DB server 55 stores purchase history information on the assumption that the content permitted to be viewed has been purchased by the user. The process of accumulating purchase history information is performed by the control unit 51.

  The viewing permission key is issued according to the following procedure. First, when a designated WEB site is accessed by the communication terminal device 6, an image for designating content is displayed. Then, by inputting predetermined items such as content specification, the server device 5 refers to the DB server 55 and issues a viewing permission key.

  The DB server 55 may accumulate user attribute information and information indicating the priority order of the attribute information. In that case, the control unit 51 creates the purchase history information by reflecting it in the user's attribute information or the like, or inputs information indicating the user's attribute information and the priority order of the attribute information to the content sending apparatus 2. Processing is also performed. As described above, the server device 5 creates the attribute information of the user and the information indicating the priority order of the attribute information by reflecting the purchase history information of the content data. Thereby, the capacity | capacitance of the content storage part 42 can be utilized efficiently, and the content according to a user's setting can be provided. Further, by providing the system with a function for automatically recommending content according to content purchase information, it is possible to save the user from inputting user information. The screen information storage unit 57 stores screen information to be displayed when content is selected on the WEB. The billing server 58 performs billing processing when the permission key issuing unit 54 issues a viewing permission key. The billing system may be any method for each title, for each of a plurality of content groups, or for free, and is not particularly limited.

  The communication terminal device 6 receives, stores, and displays WEB screen information stored in the server device 5. The user can select the content for which viewing permission is requested by displaying the WEB screen. The communication terminal device 6 transmits to the server device 5 a request signal or an email requesting a viewing permission key for viewing content to the server device 5 by a user operation. At the same time, the viewing permission key transmitted from the server device 5 is received, and the viewing permission key is stored.

  Next, the operation of the content data distribution system 1 will be described. FIG. 5 is a flowchart showing a characteristic operation of the content data distribution system 1.

  First, content data that can be distributed to the content archive server 12 is stored together (step S1). With respect to storage of content data, data transmitted using a terrestrial line or satellite line may be stored in the content archive server 12, or the content archive server may be stored from a physically distributed storage medium such as an HDD or DVD. 12 may be input.

  Next, the control unit 11 transfers the content data for distribution to the content server 14 (step S2), and creates a data file with the identification information tag attached with reference to the identification information storage unit 13 (step S3). . FIG. 6 is a diagram showing an example of the data structure of the data file 60 to which identification information tags are attached. The data file 60 is composed of attached identification information 66 and content data 69. The identification information 66 includes, for example, a content ID 62, distribution date information 63, viewing condition data 64, scheduled data erasure date 65, content attribute data 66, and other related data 67. The data file with the identification information attached is transferred to the distribution server 16 and distributed (step S4). The IP / QAM converter performs IP / QAM conversion on the distributed data file (step S5) and sends it to the CATV transmission line 7 (step S6). The CATV transmission line 7 transmits the transmitted data file by the broadcast type broadcast transmission method (step S7).

  On the other hand, the VOD terminal device 3 receives the data file transmitted through the CATV transmission path 7, and performs QAM / IP conversion by the QAM / IP conversion unit 23 (step S8). Next, the determination unit 40 of the VOD terminal device 3 determines whether or not to accumulate the data file by comparing the attached identification information with the user attribute information and information indicating the priority order of the attribute information. (Step S9). If it is determined not to store, the process ends. On the other hand, if it is determined to be stored, the data file is stored in the content storage unit 42 (S10), and the process is terminated.

  Next, the operation of the VOD terminal device 3 when reproducing content will be described. FIG. 7 is a flowchart showing a characteristic operation of the VOD terminal device 3. The operation is executed by an execution file, that is, a data reproduction program.

  First, viewing conditions are managed and controlled by starting an executable file (step T1). Management and control of viewing conditions refers to performing management and control when an input from a user is received and content is selected. Next, the control unit 35 determines whether any one of the distributed contents has been selected (step T2). If no content is selected, the process returns to step T1. When any content is selected, the content data is read (step T3), and the viewing permission management unit 45 determines whether or not a viewing permission key is necessary for reproducing the content (step T4). .

  If the viewing permission key is not required, the process proceeds to step T6. If the viewing permission key is required, the input of the viewing permission key is accepted, and it is determined whether or not the input viewing permission key matches the content-specific viewing permission key (step T5). If the viewing permission keys do not match, the process returns to step T1. If the viewing permission keys match, the content data in the content storage unit 42 is decoded from the MPEG format, and the transmission video program unit 47 organizes the transmission video (step T6). Then, the content sending unit 48 sends the program-organized content data to the television receiver 4, reproduces the content (step T7), and ends the execution.

(Embodiment 2)
In the first embodiment, the CATV transmission path 7 is a content data transmission path, but it may be a communication network such as the Internet or an IP network. In this case, the content transmission device 2 transmits a data file including content data by a broadcast type broadcast transmission system via a communication network, and the VOD terminal device 3 receives the data file. Thereby, the traffic load in the content transmission apparatus 2 can be reduced, and the system which does not receive the restriction | limiting of the number of terminal devices can be constructed | assembled. It is not necessary for the content transmission device 2 to distribute the content data in response to each user's request, thereby enabling an efficient service.

  Further, the VOD terminal device 3 efficiently determines the capacity of the content storage unit 42 in order to determine whether to store the file in the storage unit based on the user attribute information and the information indicating the priority order of the attribute information. It is possible to provide content according to user settings.

(Embodiment 3)
In the first embodiment, the content sending apparatus 2 creates an integrated data file with an identification information tag attached with reference to the identification information storage unit 13. However, the data is separated into content data and identification information. A file may be created. FIG. 8 is a diagram illustrating an example of a data structure of a separation-type data file. The content data file 70 includes only a content ID 72 and content data 73. The identification information file 71 includes, for example, a content ID 74, distribution date information 75, viewing condition data 76, scheduled data erasure date 77, content attribute data 78, and other related data 79. In the third embodiment, the content transmission apparatus 2 distributes the content data file 70 and the identification information file 71 separately.

(Embodiment 4)
In the first embodiment, the content is played back by the VOD terminal device 3 by program-organizing one content data. However, a plurality of contents are synthesized and program-organized, and the plurality of contents are organized by one program-organization. It is good also as reproducing.

  FIG. 9 is a flowchart showing a characteristic operation of the VOD terminal device 3 when a plurality of contents are combined and reproduced. The operation of the VOD terminal device 3 will be described below according to the flowchart.

  First, viewing conditions are managed and controlled by starting an executable file (step R1). Next, the control unit 35 determines whether any of the distributed contents has been selected (step R2). If no content is selected, the process returns to step R1. If any content is selected, the content data is read (step R3), and the viewing permission management unit 45 determines whether or not a viewing permission key is necessary for the reproduction of the content (step R4). .

  If the viewing permission key is not required, the process proceeds to step R6. When the viewing permission key is necessary, the input of the viewing permission key is accepted, and it is determined whether or not the input viewing permission key matches the content-specific viewing permission key (step R5). If the viewing permission keys do not match, the process returns to step R1. If the viewing permission keys match, the viewing permission management unit 45 determines whether or not there is any content to be further combined. If there is more content to be synthesized, the process returns to step R3 to further read the content. If there is no further content to be synthesized, the content data in the content storage unit 42 is decoded from the MPEG format, and the transmission video program unit 47 organizes the transmission video for all the content to be synthesized (step R7). . In this way, since a plurality of content data is synthesized and organized into a program, the execution file can reproduce other content data before, during or after the reproduction of the content data. As a result, for example, when reproducing drama content, commercial content can be inserted and reproduced at an arbitrary timing.

  Finally, the content sending unit 48 sends the program-organized content data to the television receiver 4, plays back the content (step R8), and ends the execution.

(Embodiment 5)
In the first embodiment, the distributed content data is reproduced by a data player separated from the content data. However, the content data and the data player may be distributed in the same data file.

  FIG. 10 is a diagram showing the concept of the data structure of the data file 83. The content data 81 includes image data composed of still images / moving images and audio data. In the present embodiment, the content data 81 is encrypted. Then, decrypted data 82b corresponding to the encrypted content data 82a is generated one-on-one. Next, the data player 83 that outputs the content data 81 as an image or sound, the encrypted content data 82a, and the decrypted data 82b are combined to create an executable file F. At this time, a code 84 for specifying the execution format file F is embedded. Thus, since the content data 81 is encrypted and combined with the data player 83 as the encrypted content data 82a, the data of the content data 81 is output as an image or sound even if they are separated. I can't. Thereby, security is ensured.

  FIG. 11 is a diagram showing the concept of operation management of the executable file F. The operation of the executable file F is managed by, for example, a unique manager 85 as a program. The unique manager 85 is stored so that it can be executed in the terminal device for VOD in which the execution format file F is recorded, or is outside the system where the execution format file F is executed, for example, from the outside Operates with control signals. Then, the unique manager 85 manages the usage period, usage time, or usage count for the execution format file F, and charges the user.

  In addition, as shown in FIG. 11, the operation management of the execution format file F may be performed by the soft battery manager 86 referring to the information of the soft battery 87. The soft battery 87 is a virtual battery for moving the execution format file F. That is, when the executable file F is used (executed), the virtual energy in the soft battery 87 decreases, and when the virtual energy of the soft battery 87 disappears, the executable file F can be used (executed). Disappear. By additionally purchasing the soft battery 87 or charging the virtual energy of the soft battery 87, the executable file F can be used (executed) again.

  A code 84 as a soft battery compatible code is embedded in the execution format file F, and the soft battery manager 86 uses (executes) the execution format file F when the code 84 and the soft battery 87 are in a correspondence relationship. ) That is, the soft battery manager 86 always manages the operation of the data player 83 and the virtual energy remaining amount (battery remaining amount) of the soft battery 87, and there is a virtual energy remaining amount (battery remaining amount). Permits the operation of the data player 83. On the other hand, when there is no virtual energy remaining amount (battery remaining amount), the operation of the data player 83 is prohibited. Note that when the remaining amount of virtual energy (battery remaining amount) is low, a message recommending the purchase or charging of a soft battery may be displayed to the user.

  Next, the operation of the program that creates the executable file F will be described. As shown in FIG. 12, first, an execution file for creating an execution format file F is activated. Then, customization data is input (step Q1). Next, this customized data is encrypted based on a specific algorithm (step Q2). At this time, the encrypted data and the decrypted data corresponding one-to-one are generated simultaneously. Next, tamper check data is calculated (step Q3), and each of these data, that is, the engine (program as a data player), encrypted customized data, still image, moving image, audio, or a combination thereof is configured. Data, falsification check data, etc. are combined (step Q4). Finally, it is written out as a single executable file (step Q5), and the process is terminated.

  Thus, since the decrypted data such as the customized data and the program as the data player are combined, the encrypted content data and the program as the data player that outputs the content data as an image or sound are separated. The content data cannot be played back by another data player. Also, it becomes impossible to decrypt and reproduce other encrypted content data with the separated data player. As a result, security can be ensured.

  Next, the operation when the user obtains the executable file created as described above by downloading or the like and reproduces the data will be described. As shown in FIG. 13, first, the executable file is activated. Next, it is checked whether or not the execution file has been falsified (steps P1 and P2). If the executable file has been falsified, the process is terminated, and if it has not been falsified, a reproduction permission check routine is executed (step P3). For example, when a soft battery is introduced, the soft battery compatible code embedded in the execution format file is compared with the soft battery, or the remaining amount of the soft battery is checked. If the result of determination in step P4 is not reproducible, the process is terminated, and if reproducible, customization data is read and initial setting is performed (step P5). Next, the moving image reproduction screen is displayed (step P6), and a part (or all) of the moving image data is read into the buffer (step P7). Next, the read data is decrypted using the decrypted data corresponding to the data on a one-to-one basis (step P8). Then, in the reproduction engine, that is, the data player, the data is output as an image or a sound (step P9). It is determined whether the moving image data is finished or the reproduction is finished (step P10). If the moving image data is not finished or the reproduction is not finished, the process proceeds to step P6. On the other hand, when the moving image data ends or the reproduction ends, the execution ends.

  In this way, since the encrypted content data is decrypted using the decrypted data associated with the encrypted content data on a one-to-one basis, the encrypted content data is not associated with the decrypted data on a one-to-one basis. Content data is not decrypted. In addition, the encrypted content data is not decrypted with the decrypted data that does not correspond one-to-one with the encrypted content data. Therefore, by combining encrypted content data and a program as a data player that outputs the content data as an image or sound, it is possible to separate the two and play the content data on another data player It becomes impossible. Also, it becomes impossible to decrypt and reproduce other encrypted content data with the separated data player. As a result, security can be ensured.

It is a block diagram which shows 1st Embodiment of the content data delivery system which concerns on this invention. It is a block diagram which shows the structure of a content transmission apparatus. It is a block diagram which shows the structure of the terminal device for VOD which concerns on this invention. It is a block diagram which shows the structure of the server apparatus which concerns on this invention. It is a flowchart which shows the characteristic operation | movement of the content data delivery system which concerns on this invention. It is a block diagram which shows an example of the data structure of the file containing the content data in 1st Embodiment. It is a flowchart which shows the characteristic operation | movement of the terminal device for VOD in 1st Embodiment. It is a block diagram which shows an example of the data structure of the file containing the content data in 2nd Embodiment. It is a flowchart which shows the characteristic operation | movement of the terminal device for VOD in 4th Embodiment. It is a block diagram which shows the data structure of the file containing the content data in 5th Embodiment. It is a block diagram which shows the data structure of the file containing the content data in 5th Embodiment. It is a flowchart which shows the characteristic operation | movement of the terminal device for VOD in 5th Embodiment. It is a flowchart which shows the characteristic operation | movement of the terminal device for VOD in 5th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Content data distribution system 2 Content transmission apparatus 3 VOD terminal apparatus 4 Television receiver 5 Server apparatus 6 Communication terminal apparatus 7 CATV transmission path 8 Internet 21 RF input part (reception part)
26 Input unit 27 Operation unit 28 Remote control signal receiving unit 33 Attribute storage unit (attribute information storage unit)
34 History storage unit 35 Control unit (attribute information changing unit)
40 determination unit 42 content storage unit (storage unit)
45 Viewing permission management unit 47 Transmission video program unit 48 Content transmission unit (playback unit)
51 Control Unit 52 Transmission / Reception Unit 54 Permission Key Issuing Unit 55 DB Server 60 Data File 66 Identification Information 69 Content Data 70 Content Data File 71 Identification Information File 81 Content Data 82a Encrypted Content Data 82b Decrypted Data 83 Data File (Data Reproduction Program) )
83 Data player 84 Code 85 Unique manager 86 Soft battery manager 87 Soft battery F Execution format file

Claims (14)

A receiving unit for receiving a file including content data distributed by a broadcast type broadcast transmission method from a content transmission device via a cable television network;
An accumulation unit for accumulating a file including the received content data;
An input unit that receives an input operation by a user and generates an input signal;
A VOD terminal apparatus comprising: a reproduction unit that reproduces the content data based on the generated input signal. An attribute information storage unit for storing user attribute information input from the input unit and information indicating the priority of the attribute information;
A determination unit that determines whether to store the file including the received content data in the storage unit based on the stored attribute information of the user and information indicating the priority order of the attribute information; The terminal device for VOD according to claim 1, wherein: A receiving unit for receiving a file containing content data distributed by a multicast or broadcast type broadcast transmission method from a content sending device via a communication network;
An accumulation unit for accumulating a file including the received content data;
An input unit that receives an input operation by a user and generates an input signal;
A playback unit for playing back the content data based on the generated input signal;
An attribute information storage unit for storing user attribute information input from the input unit and information indicating the priority of the attribute information;
A determination unit that determines whether to store a file including the received content data in the storage unit based on the stored attribute information of the user and information indicating a priority order of the attribute information. VOD terminal device as a feature. A history storage unit for storing reproduction history information of the reproduced content data;
An attribute information changing unit for reading the stored reproduction history information and rewriting the user attribute information and the information indicating the priority order of the attribute information stored in the attribute information storage unit to reflect the reproduction history information; The terminal device for VOD according to claim 2, further comprising: An attribute information storage unit for storing user attribute information received by the receiving unit from the content transmission device and information indicating the priority of the attribute information;
A determination unit that determines whether to store the file including the received content data in the storage unit based on the stored attribute information of the user and information indicating the priority order of the attribute information; The terminal device for VOD according to claim 1, wherein: A receiving unit that receives a file containing content data distributed by a broadcast-type broadcast transmission method from a content transmission device via a communication network;
An accumulation unit for accumulating a file including the received content data;
An input unit that receives an input operation by a user and generates an input signal;
A playback unit for playing back the content data based on the generated input signal;
An attribute information storage unit for storing user attribute information received by the receiving unit from the content transmission device and information indicating the priority of the attribute information;
A determination unit that determines whether to store the file including the received content data in the storage unit based on the stored attribute information of the user and information indicating the priority order of the attribute information; A VOD terminal device.   The VOD terminal apparatus according to claim 1, wherein the storage unit is a hard disk drive. The encrypted content data and the decrypted data associated with the encrypted content data on a one-to-one basis are distributed to the VOD terminal device according to any one of claims 1 to 7. A data reproduction program to be executed,
A process of reading the encrypted content data;
A process of decrypting the encrypted content data using the decrypted data;
A data reproduction program characterized in that a series of processes including a process of reproducing the content data as an image or sound is read by a computer and converted into an executable command. A process of reading data relating to a license for use of the content data combined with the encrypted content data;
Determining whether or not reproduction of the content data as an image or sound is permitted based on the read data relating to the license,
9. The data reproduction program according to claim 8, wherein if the reproduction of the content data as an image or sound is permitted as a result of the determination, the processing is continued, and if the reproduction is not permitted, the processing is stopped. . A data reproduction program executed by the VOD terminal device according to any one of claims 1 to 7,
A process of reading content data from the storage unit of the VOD terminal device;
A process for determining whether or not reproduction of the content data is permitted based on permission data input from an input unit of the VOD terminal device;
As a result of the determination, if the reproduction of the content data is permitted, a process of reproducing the content data as an image or sound;
As a result of the determination, if the reproduction of the content data is not permitted, a data reproduction program comprising a series of processes including a process to be terminated and computerized so as to be executable. A data reproduction program executed by the VOD terminal device according to any one of claims 1 to 7,
A process of reading the first content data and the second content data from the storage unit of the VOD terminal device;
Processing for generating content data for reproduction by combining the first content data and the second content data so that the second content data is reproduced before, during or after the reproduction of the first content data When,
A data reproduction program characterized in that a series of processes including the process of reproducing the generated content data for reproduction is read by a computer and converted into an executable command.   A DVD recorder, a television receiver, a VTR, a digital tuner, or other video or audio equipment or video or audio equipment, comprising the VOD terminal device according to any one of claims 1 to 7.   9. A content data distribution system for distributing a file including content data to a VOD terminal device according to claim 1 by a multicast or broadcast type broadcast transmission system from a content transmission device. . 14. A server device connected to the content transmission device of the content data distribution system according to claim 13 for transmitting permission data for permitting viewing of content in response to a user request to a communication terminal device via a communication network. ,
A purchase history storage unit for storing the purchase history information of the content, assuming that the content related to the license data has been purchased when the license data is transmitted;
A server apparatus comprising: an attribute information changing unit that reflects the purchase history information, creates attribute information of the user and information indicating a priority order of the attribute information, and transmits the information to the content transmission apparatus.

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