JP2006054570A - Switching system of digital content - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system which receives and records broadcasting of one resolution and can easily exchange this recorded signal to the recording signal of the other resolution. <P>SOLUTION: The switching system of a digital content includes a portable terminal 101 which receives the content of one resolution on the basis of a user's operation from a program server 114 for transmitting a plurality of contents 115, 116 each having television signals which have different resolutions, and a memory 102 for storing the received contents. The portable terminal 101 receives the content of the other resolution from the program server 114 on the basis of the user's operation, and erases the content of the one resolution stored in the memory when the reception is completed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a system for exchanging acquired digital contents, and more particularly, to a system for exchanging acquired contents with contents having different resolutions.

  The content of programs distributed by television broadcasting or the like is changing to digital signals. The digital signal has a characteristic that information is not easily lost due to storage or communication. Further, since it is difficult for deterioration to occur during copying, a copy faithful to the original may be illegally created.

  For this reason, as shown in Patent Document 1, a mechanism has been developed in which a security processing function is mounted on a memory card, and unauthorized reading is prohibited and unauthorized copying cannot be performed using this security function. Yes. In this method, reproduction is controlled between a device used for content reproduction and a storage medium storing the content using an encryption technique.

  By the way, in recent years, digitalization of TV broadcasting has progressed, and mobile broadcasting that can be viewed while moving on a small mobile terminal is planned. Such mobile broadcasting and conventional stationary type are planned. It is expected that two broadcasts consisting of a normal broadcast intended for reception by a television receiver will be arranged side by side.

In such a case, for example, after watching a mobile broadcast on the move, if the user tries to view the same broadcast on a large screen using a home stationary television receiver, the home stationary television receiver It is necessary to record normal broadcasts separately.
JP 2003-228525 A

  As described above, when a low-resolution mobile broadcast and a high-resolution normal broadcast are arranged side by side, for example, even if a mobile terminal is used to receive and record a low-resolution mobile broadcast while moving, When the same broadcast is to be viewed on a large screen with a high resolution by using a stationary television receiver, a normal broadcast must be recorded separately at the home stationary television receiver side.

  The present invention has been made in view of such problems, and provides a system capable of receiving and recording a broadcast of one resolution and easily exchanging the recorded signal with a recording signal of the other resolution. It is.

  In order to solve the above problems, the present invention employs the following means.

  A portable terminal that receives content of one resolution based on a user's operation from a program server that transmits a plurality of contents composed of television signals having different resolutions, and a memory that stores the received content. The content of the other resolution is received from the program server based on the user's operation, and when the reception is completed, the content of the one resolution stored in the memory is erased.

  Since the present invention has the above-described configuration, it is possible to easily and inexpensively exchange the resolution of recorded digital content using a portable terminal or the like.

  Hereinafter, the best embodiment will be described with reference to the accompanying drawings. FIG. 1 is a diagram for explaining a first embodiment of the present invention. In the figure, 101 is a mobile terminal comprising a mobile phone with a TV display function, 102 is a memory card with an IC card function inserted into the mobile terminal 101, 103 is a mobile phone antenna used for communication as a mobile phone, and 104 is a TV. A television receiving antenna 105 for receiving broadcasts is a mobile phone base station that transmits and receives data to and from the mobile terminal 101. 106 is a mobile phone base station antenna, 107 is a mobile network to which the mobile phone base station 105 is connected and transmits / receives data, 108 is a mobile phone information billing device connected to the mobile network 107, and 109 is a mobile phone information billing device 108. 1 is a billing management server that manages billing information for each mobile phone, and 110 is billing information that is managed by the information billing server and records the billing amount charged for each mobile phone. .

  Reference numeral 111 denotes a gateway which is connected to the mobile network 107 and exchanges part of information exchanged with each mobile phone with an external network. Reference numeral 112 denotes a television network connected via the gateway 111, and 113 denotes a broadcasting station connected to the television network 112. Reference numeral 114 denotes a program server that manages transmission of a program, which is content information transmitted from the broadcasting station 113. Reference numeral 115 denotes a mobile program which is content managed by the program server 114.

  The mobile program 115 is a program content suitable for viewing while moving like a mobile phone, for example, and is a low-resolution content with a small target screen size. 116 is a general program managed by the program server in the same manner as the mobile program 115. The general program 116 has a higher resolution than the mobile program.

  Reference numeral 117 denotes program billing information, which is managed by the program server 114 and records viewing charges of individual users for the transmitted program. Reference numeral 118 denotes an antenna for program broadcasting, which transmits a program managed by the program server 114. Note that the program server 114 manages programs to be transmitted via the program broadcast antenna 118 or the television network 112. The program billing information 117 is transmitted as billing information 110 to the mobile phone billing management apparatus 108. At this time, the mobile phone billing management apparatus 108 sets the billing amount to a value obtained by adding program billing to billing for the mobile phone.

  Reference numeral 119 denotes a television receiving antenna that receives radio waves from the program broadcasting antenna 118, and 120 denotes a television recording device, which is connected to the television network 112 and the television receiving antenna 119, and displays a program that is content transmitted from the broadcasting station 113. Demodulate. Recording is also possible. A television display device 121 displays a television signal output from the television recording device 120. Reference numeral 122 denotes a short-range non-contact communication unit, which is connected to the television recording device 120 and performs non-contact bidirectional data communication with an external device according to ISO / IEC 18092. Reference numeral 123 denotes a non-contact communication antenna, which forms a communication path with the outside for the near-field non-contact communication unit 122 to perform non-contact communication with an external device.

  FIG. 2 is a diagram for explaining the details of the portable terminal 101 and the memory card 102 with the IC card function shown in FIG. In addition, the same number is attached | subjected to the same structure as FIG. In the figure, 201 is a control unit for controlling the memory card 102 with the IC card function, 202 is an IC card to be described later, and is controlled by the control unit 201, and functions and performance as an IC card according to ISO 7816, particularly a high security function. And is mounted as dedicated hardware inside the memory card 102 with IC card function. Reference numeral 203 denotes a memory described later, which is controlled by the control unit 201 and records received content. A copyright management unit 204 controls the memory 203 and the IC card 202 inside the control unit 201 so that content information input from the outside cannot be easily read from the outside.

  A central processing control unit 205 exchanges data with the memory card 102 with an IC card function and further controls various functions inside the portable terminal 101. A mobile phone copyright management unit 206 operates inside the central processing control unit 205, particularly facing the copyright management unit 204 of the memory card 102 with the IC card function. A device operation input unit 207 is controlled by the central processing control unit 205 and performs input by the operator of the mobile phone and output to the operator. Reference numeral 208 denotes a telephone line call unit, which transmits and receives information wirelessly to and from the mobile phone base station 105 via the mobile phone antenna 103, thereby enabling information exchange with the telephone network 107. Reference numeral 209 denotes a television signal receiver, which receives information by demodulating broadcast radio waves received by the television receiving antenna 104.

  A display unit 210 displays television information received by the television signal receiving unit 209, information obtained by the telephone line call unit 208, or information from the central processing control unit 205. Reference numeral 211 denotes a power supply peripheral unit that supplies power to the portable terminal 101 and the memory card 102 with an IC card function. A voice input / output unit 212 performs voice input / output with the telephone line call unit 208 or outputs voice information from the television signal receiving unit 209. A mobile phone short-range non-contact communication unit 213 transmits and receives information without contact with an external device. Reference numeral 214 denotes an antenna for non-contact communication, which is used when the mobile phone short-range non-contact communication unit 213 performs information transmission / reception with the outside. 215 is unique information in which information unique to the portable terminal 101 is recorded, and 216 is a telephone number of the portable terminal 101 recorded in the unique information 215.

  FIG. 3 is a diagram for explaining the configuration of the recording information inside the IC card 202. The same components as those in FIG. 2 are given the same reference numerals. In the figure, 301 is viewing program information, which is received by the mobile terminal 101 via the TV signal receiving function 209 and records information of the program that is the content that was viewed. 302 is discount coupon information recorded in the IC card 202, 203 is a card unique number, and is different for each IC card used by the copyright management function 204 or the like. Reference numeral 304 denotes copyright management information, which is information used for an encryption function used by the copyright management unit 204.

  Reference numeral 305 denotes a number representing one program that has been viewed. Program ID 1 and 306 are program management information 1 for managing one program corresponding to this program ID 1 305. Reference numeral 307 is an encryption key 1 for reading this one program. 308 is a telephone number 1 indicating the telephone number of the portable terminal used when viewing this one program.

  Similarly, program IDs 2, 309, which are numbers representing other one program that has been viewed, are program management information 2, 311 for managing another program corresponding to this program ID 2, 309, The encryption keys 2 and 312 for reading out one program are the telephone number 2 indicating the telephone number of the portable terminal used when viewing the other one program.

  In the following, 313 and 317 are program ID3 and program ID4 indicating other programs that have been viewed, 314 and 318 are program management information 3 and program management information 4.315 and 319 are management information of other programs, respectively. Encryption key 3 and encryption key 4, which are encryption keys for other programs, 316 and 320 are telephone number 3 and telephone number 4 indicating the telephone number of the portable terminal in which the other program is recorded.

  FIG. 4 is a diagram for explaining the configuration of the memory 203. The same components as those in FIG. 2 are given the same reference numerals. In the figure, 401 is a viewing program as recorded program information, 402 is an ID indicating one of the programs recorded in the viewing program 401, and is associated with the program ID 1305 in FIG. Reference numeral 403 denotes content information 1 that is the contents of the program indicated by the program ID 1 402.

  Similarly, 404 is an ID indicating another recorded program, and is associated with the program ID2 309 in FIG. Reference numeral 405 denotes content information 2 that is a program indicated by a program ID 2 404. Reference numerals 406 and 408 denote IDs indicating other recorded programs, which are the program ID 3 and the program ID 4 associated with the program ID 3 313 and the program ID 4 317 in FIG. Reference numerals 407 and 409 denote content information 3 and content information 4 which are the programs indicated by the program ID 3 406 and the program ID 4 408, respectively.

  FIG. 5 is a diagram for explaining the details of the program management information 306. The same components as those in FIG. 3 are given the same numbers. In the figure, reference numeral 501 denotes a recording time 1 indicating the start time and end time of recording of a program, 502 denotes a copy permission number 1, 503 indicating the number of copies allowed to be created on another device of the recorded program, and 503 is recorded. The number of copies 1, 504 indicating how many times the program is copied from the first copied information is a hash value obtained for the content information 1 of the program recorded in the memory 203 Hash value 1

  FIG. 6 is a diagram for explaining processing between the memory card 102 with the IC card function inserted into the portable terminal and the program server 114.

  Content that is a program is recorded in advance on the memory card 102 with the IC card function. First, the recording operation will be described. The mobile terminal 101 receives the mobile program 115 of the broadcast station 113 via the TV receiving antenna 104 and the TV signal receiving unit 209. When displaying the content which is the received program, the IC card 202 inside the memory card 102 with the IC card function is used. For example, the function of a B-CAS card (registered trademark) in terrestrial digital broadcasting is stored in the IC card 202 and used. Furthermore, the user of the portable terminal 101 operates the device operation input / output unit 207 to instruct recording of a program to be viewed. As a result, the central processing control unit 205 starts recording processing on the memory card 102 with the IC card function. In the recording process, first, the central processing control unit 205 confirms the recording permission flag indicated in a part of the content information received from the television receiving unit 209. When the recording permission flag is recordable, a series of processes for recording content with the copyright management unit 204 of the memory card 102 with the IC card function using the mobile phone copyright management function 206 is performed. Do. For example, mutual authentication is performed between the mobile phone copyright management unit 206 and the copyright management unit 204, and the subsequent encryption communication path is established.

  The copyright management unit 204 uses the copyright management information 304 and the card unique number 303 inside the IC card 202 for mutual authentication and establishment of an encryption communication path. Thereafter, information on the contents of the program is transferred together with information accompanying the memory card 102 with the IC card function. Here, the accompanying information includes a program ID indicating each program, a telephone number of the mobile terminal 101 being used, a recording start time, the number of permitted copies, and the like. The transferred content information and accompanying information are recorded in the IC card 201 and the memory 203 by the control unit 201 after necessary processing. The content information of the program is stored in the memory 203 as content information 403 after the copyright management unit 204 performs necessary processing.

  In this embodiment, a hash value is calculated for the content information 403 stored by the copyright management function 204 and the content information and accompanying information, and this value is recorded as the content hash value 504 in the IC card 202. Thereby, tampering can be detected. The mobile program recorded in this way can be exchanged for program content suitable for display on a large screen when displayed on the television display device 120 having a large screen. Next, this exchange will be described.

  In FIG. 6, an arrow connecting a line indicating the memory card 102 with the IC card function and a line indicating the program server 114 indicates data input / output by each device. First, the user of the mobile terminal 101 operates the device operation input / output function 207 to give an instruction to replace the recorded program. The central processing control unit 205 sends a program exchange request to the program server 114 in step 601. At this time, the program ID of the program to be exchanged is read out from the memory card 102 with the IC card function and transmitted. Further, the telephone number 216 read from the unique information 215 of the portable terminal that sends the exchange request is also sent. When the exchange is requested, the program server 114 reads out the program, which is the large-screen content corresponding to the program ID already owned by the terminal, from the large-screen program 116 in step 602 and encrypts the content information. Send out as 1 '. At the same time, the information accompanying the content information 1 'is sent as the content information 1' related information. In the case of this embodiment, among the data sent as the content information 1 'related information, the number of copies 1' (not shown) is set to 0 as a newly created copy.

  The memory card with IC card function 102 decrypts the received information using the copyright management unit 204. After the necessary confirmation and recording are performed on the content information 1 'related information, the telephone number 308 recorded in the viewing program information is added to the request for authentication and transmitted.

  The program server 114 records the telephone number 1 received in step 603, and performs authentication by the copyright management function with the copyright management unit of the memory card 102 with the IC card function in step 604. This authentication uses authentication used for normal copyright management. As a result of the authentication, if it is confirmed that the devices are mutually correct, the memory card 102 with the IC card function is a process for the program ID 306 already recorded in the memory card 102 with the IC card function in step 605. The number of permitted copies 502 of the program management information 306 is set to zero. This makes it impossible to create a duplicate by copying. Furthermore, the recorded content information 1 'related information is recorded in the internal IC card 202 or memory 203 as information for a new program. The program server 114 continuously transmits the encrypted content information 1 'in response to the successful completion of the authentication in step 606.

  In step 607, the memory card 102 with the IC card function records the received content information 1 ′ in the internal memory 203. Thereafter, the processing is continued, and in step 608, the last data of the encrypted content information 1 'is sent together with information indicating that it is the last data. The memory card 102 with the IC card function records the last data of the content information 1 ′ received in step 609, and in step 610, the viewing program information 301 is obtained as program information corresponding to the program ID already recorded. The program ID 305, the program management information 306, the encryption key 307, and the telephone number 308, and the program ID 402 and content information 403 of the viewing program 401 are deleted.

  In the case of the present embodiment, the program ID1 which is a mobile program that has already been viewed has been deleted, but when exchanging the program ID1, for example, the copy permission count is unlimited, and unlimited copy creation is permitted. It goes without saying that erasure is not necessary. The program server 114 determines a billing destination for the exchange cost from the received telephone number 308 and the telephone number 216 stored as the unique information 215. For example, if the phone number 308 used for recording the mobile program is the same as the phone number 216 of the mobile terminal 101 used for the exchange, the user has already watched the program once using the mobile terminal, so Free or discounts. These charges are determined in advance between the broadcast station 113, which is a service provider who exchanges programs, and the user. According to this agreement, the cost required for the exchange is calculated. The program server 114 records this cost in the program information billing 117 as billing information for the telephone number in step 611. The recorded billing information is then transferred to billing information 110 managed by the mobile phone billing information 108, and summed with the charge for using the telephone line via the mobile network 107 of the mobile terminal 101, and charged to the user. . Payment of the charged fee by the user is performed by withdrawal from a settlement account or payment by cash, as in the past.

  FIG. 7 is a diagram for explaining processing among the memory card 102 with the IC card function, the program server 114, and the television recording device 121 inserted into the portable terminal.

  When exchanging data between the memory card 102 with the IC card function and the television recording device 121, for example, the non-contact communication antenna 214 of the portable terminal 101 is held over the non-contact communication antenna 123 of the television recording device 121. Accordingly, the television recording device 121 and the memory card 102 with the IC card function of the mobile terminal 101 can exchange information via the mobile phone short-range non-contact communication unit 213 and the short-range non-contact communication unit 122. When the user of the television recording device 121 gives an instruction to exchange the program recorded on the portable terminal 101, a program exchange request is issued to the program server 114 in step 701. At this time, the program ID of the program to be exchanged is read from the memory card 102 with the IC card function of the portable terminal 101 via the short-range non-contact communication function 122.

  When the exchange is requested, the program server 114 reads the program, which is the content for the large screen corresponding to the program ID already possessed by the portable terminal 101, from the large screen program 116 in step 702, and is encrypted. It is sent out as content information 1 ′. At the same time, the information accompanying the content information 1 'is sent as the content information 1' related information. In the present embodiment, among the data sent as the content information 1 'related information, the number of copies 1' (not shown) is set to 0 as a newly created copy. The television recording device 121 performs a process for decoding using a copyright management function (not shown) having the received information therein. For decryption, part of the necessary processing is performed using the copyright management unit 204 in the memory card 102 with the IC card function. After performing necessary confirmation and recording on the content information 1 ′ related information, the telephone number 308 read from the memory card 102 with the IC card function of the mobile terminal 101 via the short-range non-contact communication unit 122 in response to the authentication request. Is added and sent.

  The program server 114 records the telephone number received in step 703, and performs authentication by the copyright management function with the copyright management unit of the memory card 102 with the IC card function in step 704. For this authentication, authentication used for normal copyright management is used. As a result of the authentication, when it is confirmed that the devices are mutually correct, the memory card 102 with the IC card function performs processing for the program ID 306 already recorded in the memory card 102 with the IC card function in step 705. The copy permission count 502 of the program management information 306 is set to zero. This makes it impossible to create a duplicate by copying to another.

  The television recording device 121 records the recorded content information 1 'related information on an internal recording medium (not shown) or the IC card 202 as information for a new program. The program server 114 continues to send out the encrypted content information 1 'in response to the successful completion of the authentication in step 706. The television recording device 121 records the content information 1 ′ received in step 707 on an internal recording medium. Thereafter, the processing is continued, and in step 708, the last data of the encrypted content information 1 'is sent together with information indicating that it is the last data. The television recording device 121 records the last data of the content information 1 ′ received in step 709 and transmits signal information indicating that the recording has been normally completed to the memory card 102 with the IC card function in step 710.

  In step 711, the memory card 102 with the IC card function includes each of program ID 305, program management information 306, encryption key 307, and telephone number 308 of the viewing program information 301 as program information corresponding to the program ID already recorded. The information, the program ID 402 of the viewing program 401, and the content information 403 are deleted.

  In the case of this embodiment, the program ID, which is a mobile program that has already been viewed, is deleted, but when exchanging the program ID, for example, the copy permission count is unlimited, and unlimited copy creation is permitted. It goes without saying that erasure is not necessary. In step 712, the memory card 102 with the IC card function notifies the television recording device 121 that the erasure is completed. The television recording device 121 receives this result and notifies the program server 114 of the end of the exchange in step 713. The program server 114 determines the billing destination for the replacement cost from the received telephone number 1308. In this example, since the user has already watched the program once using the mobile terminal, the exchange is free or discounted. These charges are determined in advance between the broadcasting station 113, which is a service provider who exchanges programs, and the user. According to this agreement, the cost required for the exchange is calculated. The program server 114 records this cost in the program information bill 117 as billing information for the telephone number 308 in step 714. The recorded billing information is then transferred to billing information 110 managed by the mobile phone billing information 108, and summed with the charge for using the telephone line via the mobile network 107 of the mobile terminal 101, and charged to the user. . Payment of the charged fee by the user is performed by withdrawal from a settlement account, payment by cash, or the like, as before.

  FIG. 8 is a diagram for explaining processing between a memory card with an IC card function inserted into a portable terminal and a contactless communication chip embedded in an advertising medium.

 The non-contact communication chip 802 has a function of performing short-range non-contact communication including an antenna for performing short-range non-contact communication. When the non-contact communication antenna 214 of the mobile terminal 101 is brought close to the non-contact communication chip 802, the mobile terminal detects this and short-distance non-contact according to ISO / IEC 18092 with the contact communication chip 802. Communicate. Information exchanged by short-range non-contact communication is transmitted to the memory card 102 with IC card function via the central processing control unit 205 of the portable terminal 101.

  FIG. 9 is a diagram for explaining exchanged data. In FIG. 9, in step 901, the memory card 102 with IC card function and the non-contact communication chip 802 confirm that they are correct devices by mutual authentication. If the authentication result is correct, discount coupon information is passed from the non-contact communication chip 802 to the memory card 102 with IC card function in step 902. The memory card 102 with the IC card function records the discount rate indicated in the discount coupon information in the discount coupon information 302 of the IC card 202.

  The recorded coupon information 302 is read at step 603 in FIG. 6 or step 703 in FIG. 7 and sent to the program server 114. The program server 114 discounts the viewing fee of the program, for example, or makes it free at step 611 in FIG. 6 or step 714 in FIG. Further, depending on the contents of the coupon information 302, it is also used to make the viewing fee for the program free when the program is first viewed. Further, depending on the contents of the coupon information 302, content information 1 ′ sent from the program server 114 after step 606 in FIG. 6 or after step 706 in FIG. 7 or content information sent at the beginning of the program at the time of viewing. 1 may be transmitted as a content in which commercials that are advertisements of program providers are eliminated. After the coupon information 302 recorded on the IC card 202 is used for these discount processes, it is temporarily invalidated at step 605 in FIG. 6 or step 705 in FIG. 7, for example. The invalidation operation is performed by providing flag information (not shown) indicating validity and invalidity in a part of the discount coupon information 302 and invalidating the flag information. Thereafter, at step 610 in FIG. 6 or step 711 in FIG. 7, the discount coupon information 302 itself is initialized and deleted.

  In this way, by using the short-range non-contact communication, the IC card 202 in which the copyright management information and the like in the memory card 102 with the IC card function inserted from the TV recording device 120 into the portable terminal 101 can be used. . This eliminates the need to re-insert the memory card 202 with the IC card function into the television recording apparatus when exchanging programs. In addition, when using near field contactless communication, coupon information is obtained from a contactless communication chip embedded in an advertising medium distributed in advance by a program provider, and this coupon is used when viewing or exchanging a program. Discounts on various service charges. In addition, the discount coupon can be used so that the user can watch the program without seeing the commercial put in the program. Moreover, the copyright management of content with high security can be easily constructed by using an IC card which is generally high in security and widely used for copyright management. Further, when recording a large-screen content by exchanging programs, the number of copies indicating duplication is 0, so that it is recorded as newly recorded. For this reason, the recorded contents for the large screen can be used as new contents. Furthermore, information and coupon information used for managing the content recorded on the IC card is deleted when the content is completely moved. For example, when data is interrupted due to some communication failure during content movement. However, even if the copy cannot be made, the contents of the already recorded program can be viewed.

  As described above, according to this embodiment, it is possible to easily exchange the resolution of recorded digital content using a mobile terminal or the like. In addition, since contents are exchanged using a portable terminal, there is no need to exchange for a dedicated exchange terminal or center. Moreover, the cost required for the exchange can be easily settled together with the cost of using the mobile phone. In addition, since the user has already purchased low-resolution content, the exchange of the resolution of the recorded digital content can be set at a lower cost than when newly purchasing high-resolution content. . Each processing unit described above can be realized by a program or the like. Each processing unit can be realized by hardware.

It is a figure explaining the 1st Embodiment of this invention. It is a figure explaining the portable terminal 101 shown in FIG. 1, and the memory card 102 with an IC card function in detail. 2 is a diagram for explaining the configuration of recording information inside an IC card 202. FIG. 3 is a diagram illustrating a configuration of a memory 203. FIG. It is a figure explaining the detail of the program management information 306. FIG. It is a figure explaining the process between the memory card 102 with an IC card function inserted in the portable terminal, and the program server 114. FIG. It is a figure explaining the process between the memory card 102 with an IC card function inserted in the portable terminal, the program server 114, and the television recording apparatus 121. It is a figure explaining the process between the memory card with an IC card function inserted in the portable terminal, and the non-contact communication chip embedded in the advertising medium. It is a figure explaining the data exchanged in the process shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Mobile terminal 102 Memory card with IC card function 103 Mobile phone antenna 104 Television receiving antenna 105 Mobile phone base station 106 Mobile phone base station antenna 107 Mobile phone network 108 Mobile phone billing management device 109 Billing management server 110 Billing information 111 Gateway 112 Television network 113 Broadcast station 114 Program server 115 Mobile program 116 General program 117 Billing information 118 Program broadcast antenna 119 Television reception antenna 120 Television recording device 121 Television display device 122 Short-range non-contact communication unit 123 Non-contact communication antenna 201 Control Unit 202 IC Card 203 Memory 204 Copyright Management Unit 205 Central Processing Unit 206 Mobile Phone Copyright Management Unit 207 Device Operation Input Unit 208 Telephone Line Calling unit 209 Television signal receiving unit 210 Display unit 211 Power supply etc. peripheral unit 212 Voice input unit 213 Mobile phone short-range non-contact communication unit 214 Non-contact communication antenna 215 Specific information 216 Telephone number

Claims (10)

A portable terminal that receives content of one resolution based on a user's operation from a program server that transmits a plurality of content composed of television signals having different resolutions;
It has a memory to store the received content,
The mobile terminal receives the content of the other resolution from the program server based on a user operation, and erases the content of the one resolution stored in the memory when the reception is completed Replacement system. The digital content exchange system according to claim 1, wherein
A digital content exchange system, wherein one resolution content is a low-resolution content for a portable terminal, and the other resolution content is a high-resolution content for a stationary television receiver. The digital content exchange system according to claim 1, wherein
A digital content exchanging system, wherein content having the other resolution received based on a user's operation is stored in a portable memory detachably attached to a portable terminal. The digital content exchange system according to claim 3, wherein
A digital content exchange system, wherein a portable memory can be attached to a stationary television receiver. The digital content exchange system according to claim 1, wherein
A stationary television receiver having a communication unit connected to the program server, wherein the television receiver receives the content of the other resolution from the server via the communication unit based on a user's operation; Is a digital content exchange system that deletes the content of the one resolution stored in the memory of the portable terminal when transmission is completed. The digital content exchange system according to claim 5, wherein
A digital content exchange system, wherein the portable terminal includes a non-contact communication unit that communicates with a stationary television receiver. The digital content exchange system according to claim 1, wherein
A digital content exchange system, wherein the portable terminal includes a memory for storing copyright management information of the received content. The digital content exchange system according to claim 6, wherein
A non-contact communication unit provided in a portable terminal reads a signal of a non-contact communication chip embedded in an advertising medium, and is a digital content exchange system. The digital content exchange system according to claim 1, wherein
A digital content exchange system comprising a billing management server, wherein the billing management server calculates a billing amount related to the content transmitted by the program server for each portable terminal. Receiving content of one resolution from a program server that transmits a plurality of content comprising television signals of different resolutions;
Storing received content in memory;
Receiving the content of the other resolution from the server based on a user operation, and erasing the content of the one resolution stored in the memory when the reception is completed; method of exchange.

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