JP4586833B2 - Receiving apparatus and receiving method - Google Patents

Description

  The present invention relates to a copyrighted material distribution and reception system in which content, which is the content of a copyrighted work, is converted into data and distributed via a predetermined transmission path, and the receiving side is charged a reception fee for each received content. The present invention relates to a receiving apparatus and a receiving method applied to such a system.

  Digital satellite broadcasting is spreading. Digital satellite broadcasting is more resistant to noise and fading than existing analog broadcasting, and can transmit high-quality signals. In addition, the frequency utilization efficiency is improved and the number of channels can be increased. For example, in digital satellite broadcasting, it is possible to secure several hundred channels with one satellite. In such digital satellite broadcasting, a large number of specialized channels for sports, movies, music, news, etc. are prepared, and programs for specialized content are broadcast on these specialized channels.

  Among these specialized channels, the music channel is one of the popular channels, and a promotional program mainly introducing new songs and hit songs is broadcast.

As a technique related to such a field, for example, there is a technique shown in Patent Document 1.
Japanese Patent Laid-Open No. 04-180451

  As described above, in the conventional music channel, new song introductions and hit song programs are sent by moving images and sounds. When viewers watch a music channel like this and find a song they like, they may want to purchase a CD of the song being introduced and enjoy it. You may also want to know information about the artist of the song and information about the album that contains the song. If you are watching a music program and want to know information about the artist of the song or the album that contains the song, you can get that information on the spot, and if you find a song you like, It would be very convenient if you could download the audio data. However, in the conventional music channel, the moving image and the sound related to the music are unilaterally transmitted, and such a request cannot be met.

  Therefore, in order to solve such problems, music content distribution in which information related to music broadcast on a music channel can be easily obtained and the music data can be easily downloaded to a data storage device. A system has been proposed (1997 patent application No. 308488).

  By the way, there is a so-called FLAT charging method as a charging method for providing a music broadcast channel. In this method, the user can listen to a plurality of provided music broadcast channels by paying a fixed monthly fee.

  However, with the above billing system, all the music that is playing can be recorded on a digital recording medium such as an MD as many times as long as a certain monthly fee is paid. In this case, since the distribution company cannot know what song the viewer has recorded, it is not possible to pay an appropriate copyright fee to the copyright holder of the song that is the work. Therefore, there is a problem that the copyright may not be sufficiently protected.

  Such problems are widely distributed not only in systems that distribute music content, but also in video content distribution systems, as well as character / image information distribution systems such as so-called electronic books. It is also a problem in the system as well.

  The present invention has been made in view of such problems. The purpose of the present invention is to distribute the copyrighted work as data and to charge the copyright holder for the copyrighted person. It is an object of the present invention to provide a receiving apparatus and a receiving method capable of paying an appropriate copyright fee corresponding to the use situation of the copyrighted work.

Receiving apparatus of the present invention is encrypted by the delivery device, a receiving device for receiving the transmitted Turkey content, storage for holding a content decryption means for decrypting the encrypted content, the viewing restriction amount of content Means, selection means for selecting purchased content, acquisition means for acquiring the selected content by digital broadcasting, and determination means for determining which of the total viewing amount and the viewing limit amount of the acquired content is greater There are history holding means for holding the content purchase history and history transmission means for sending the content purchase history to a device for counting the amount of the copyright fee to the content author . When the selection unit selects the purchase content and the determination unit determines that the total viewing amount is below the viewing limit amount , the content decryption unit performs a decryption process, and the history holding unit performs the content purchase history. To record. Then, the history transmission means, when the free space in the storage area of the history holding means is less than a predetermined value, or when the specified date and time is set in advance, the total viewing amount exceeds the preset specified amount If any one of the above is satisfied, the content purchase history is transmitted.

Receiving method of the present invention is encrypted by the delivery device, a method of receiving the transmitted Turkey content, comprising the steps of holding a viewing restriction amount of the content, and selecting purchasing content, the selected content and obtaining the digital broadcasting, the method determines which is greater between viewing the total amount and visual auditory limit value of acquired content, if less than the auditory limit value seen viewing the total amount, already acquired Decrypting the encrypted content and recording it in the content purchase history, and when the free space in the storage area for recording the content purchase history falls below a predetermined value, when the specified date and time set in advance is reached, If the total amount exceeds the preset amount, the amount of the copyright fee to the content author will be calculated when any one of them is satisfied. It is intended to include a step of transmitting the content purchase history to an apparatus for total.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows the overall configuration of a music distribution receiving system as a copyrighted material distribution receiving system according to an embodiment of the present invention. This system broadcasts music programs using digital satellite broadcasting and distributes audio data related to the music programs so that viewers can listen to the music programs. An IPPV (Impulse Pay Per View) system is employed in which music can be easily purchased on the spot when there is music. The user pays a viewing fee for the viewed program by post-payment. However, in the present embodiment, it means a method of paying a fee corresponding to the amount of music downloaded from the distribution device 1 by the user (recording the received music on some recording medium). In the following description, a music piece as a distributed work is also referred to as “content” as appropriate.

  As shown in FIG. 1, this music distribution receiving system includes a distribution device 1 for distributing a television (TV) program, various types of music, and the like, and a material such as a TV program or music received from the distribution device 1 as an antenna. The ground station 2 that transmits the radio wave from the satellite 2 to the satellite 3, the receiver 4 that is provided at the subscriber's home of this system and that can receive the radio wave from the satellite 3, the receiver 4 and the telephone line 5 And a customer management center 6 that can be connected to the distribution apparatus 1 via a dedicated line. The “subscriber” is a viewer who subscribes to the music distribution receiving system, and is also referred to as “customer” or “user” as appropriate in the following description.

  The distribution apparatus 1 includes a program organization input terminal 101, a music input terminal 102, a copyright information input terminal 103, a copyright management apparatus 104, an encryption apparatus 105, a television program material server 106, and a music material server 107. A voice additional information server 108, a GUI (Graphical User Interface) data server 109, a communication interface (I / F) device 110, and a program organization server 111. These devices are connected to each other by a LAN (Local Area Network) 112. This LAN 112 is connected to the ground station 2 via the router 113.

  The program organization input terminal 101 is used to input program organization information for organizing a broadcast program. As the program organization information, the title of the TV program, the event ID that is identification information unique to the program, the broadcast date and time, the titles of a plurality of songs distributed in parallel with the TV program, and the allocation of subchannels (audio channels) for each of these songs And a service ID indicating the music, information associated with the music, and the like. The accompanying music information includes an artist who is playing (or singing) a song, a songwriter, a composer, a still image of a jacket of a recording medium such as a CD (compact disc) on which the song is recorded, and the CD Release date and concert information related to the artist. These input program organization information is stored in the program organization server 111. Also, some items included in the input program organization information are stored in a program identification information database (DB) 1041 of the copyright management apparatus 104 as program identification information described later.

  The music input terminal 102 is used to enter music recorded on a recording medium such as a CD provided by the copyright holder into the distribution apparatus 1. The input music is stored in the music material server 107. It is like that. Note that music recorded on a CD or the like is usually handled as a copyrighted work and is protected by copyright. Therefore, when using it, the lyricist or composer who is the copyright holder, or Consideration is required for the record company that is the copyright holder. In particular, in a system in which a subscriber pays a reception fee to a distribution company by the IPPV method, such as the music distribution receiving system of the present embodiment, reception by the subscriber (specifically, downloading of music) Therefore, it is necessary to pay a copyright fee according to the frequency of the data, and therefore management of reception status for all subscribers is important.

  The copyright information input terminal 103 is for inputting information related to copyright (hereinafter referred to as copyright information) obtained from the copyright owner. The copyright information input from here is stored in a copyright information database (DB) 1042 in the copyright management apparatus 104 as described later. The copyright information includes a content ID that is unique music identification information attached to each music, the name of the copyright owner and the name of the copyright owner (the song company or composer of the music, or the record company that is the copyright holder, etc. ), A selling price (a fee that a distribution company obtains from a subscriber when the music is downloaded once), a copyright fee rate (a ratio of the copyright fee to a selling price), and the like.

  The copyright management device 104 is for managing the copyright related to the music to be distributed, and in particular, an appropriate copyright corresponding to the amount of music used (specifically, the number of times the music has been downloaded by the subscriber). Various processes are performed to make it possible to pay the copyright to the copyright holder. The detailed configuration of the copyright management apparatus 104 will be described later.

  The encryption device 105 decrypts (descrambles) the individual information for each subscriber and the decryption (descrambling) required when the receiver side decrypts the music that is encrypted and distributed by the scramble processing, as will be described later. This is for performing processing for encrypting a key (work key Kw described later). Here, the individual information is supplied from a customer information database 6b (described later) in the customer management center 6, and is an IC card that is an identification number unique to the IC card, which is assigned by each distributor to each subscriber at the time of subscription. Contract information that represents the ID, the number of the work key Kw used to decrypt the music received at the receiving device 4b of the receiving equipment 4 at the subscriber's home, and the contents of the receiving contract that the distributor has concluded with each subscriber Etc. The contract information includes a contract service ID indicating a channel with a viewing contract, a contract event ID indicating a program with a viewing contract, a contract type indicating whether or not a desired music can be downloaded, and a program described later. There are purchase limit, call designation date and time, call designation amount, etc. The IC card is used by being set in a receiver 4b (to be described later) in the receiving facility 4 at the subscriber's house, and is indispensable for downloading the music to be distributed.

  The encryption device 105 includes an encryption key database 105a. The encryption key database 105a stores an individual key Km, which is an encryption key for encrypting subscriber's individual information, and a work key Kw, which is an encryption key for encrypting program identification information. The individual key Km is an encryption key that is different for each subscriber, and exists in the same number as the number of subscribers.

  The TV program material server 106 is a server that provides materials such as ordinary music broadcast programs. The TV program material stored in the TV program material server 106 is a material composed of a video (video) and a sound (audio). For example, a sound with a video for promotion of a new song introduction and a ranking of the latest hit songs. Charts and the like.

  The music material server 107 is a server that stores music input from the music input terminal 102 and provides an audio program to the ground station 2 using an audio channel. The material of this audio program is only sound (music). The music material server 107 can send audio program materials of a plurality of audio channels to the ground station 2. As will be described later, in the program broadcast of each audio channel, the same music is repeatedly broadcast for a predetermined unit time. Each audio channel is independent of each other, and various methods can be used. For example, on one audio channel, the recommended song in the latest Japanese pop is broadcast repeatedly for a predetermined time, on the other audio channel, the recommended song in the latest American pop is repeatedly broadcast for a predetermined time, and other In other audio channels, it is possible to use a method of repeatedly broadcasting a recommended song from jazz for a predetermined time. Also, a plurality of music pieces of the same artist may be divided into respective audio channels and repeatedly broadcast. Here, the music material server 107 in the distribution apparatus 1 mainly corresponds to the “content distribution unit” in the present invention.

  The audio additional information server 108 provides music time information output from the music material server 107. This time information is information representing the time information of the music output from the music material server 107, specifically, the total performance time of the music and the elapsed time from the start of the music performance.

  The GUI data server 109 includes data for forming a list page of music to be distributed and an information page screen for each music, data for forming still image data of a jacket of a CD containing the music, and an EPG. It provides music-related information such as data for forming a screen for (Electric Program Guide). Although details will be described later, in the music distribution / reception system of the present embodiment, for example, by the operation of the GUI on the screen of the television receiver 4d in the reception facility 4 at the subscriber's home, the lyrics of the music to be distributed and the artist's An information page including concert information and the like can be displayed on the screen, and music can be selected, downloaded and reserved. The GUI data server 109 is configured to send music accompanying information necessary for such processing to the ground station 2 together with other information. Such music-accompanying information is created using, for example, the MHG (Multimedia and Hypermedia Information Coding Experts Group) method.

  The communication I / F device 110 is used to connect each device in the distribution device 1 to the customer management computer 6 a of the customer management center 6, so that each device in the distribution device 1 and the customer of the customer management center 6 can be connected. Bidirectional communication with the management computer 6a is possible. The router 113 is for connecting the LAN 112 in the distribution apparatus 1 and the LAN (not shown) in the ground station 2. Here, the communication I / F device 110 mainly corresponds to the “reception unit” in the present invention.

  Here, the configuration of the copyright management apparatus 104 will be described in detail.

  FIG. 2 shows the configuration of the copyright management apparatus 104 in FIG. As shown in this figure, the copyright management apparatus 104 is input from a program identification information database 1041 that stores program identification information of program organization information input from the organization terminal 101 and from a copyright information input terminal 103. And a copyright information database 1042 for storing sales history information generated based on the copyright information and a report from the customer management center 6.

  The program identification information stored in the program identification information database 1041 includes a service ID, an event ID, a broadcast date and time, etc., and a large number of these pieces of information are registered in association with the content ID. Here, the program identification information corresponds to “reception content identification information” and “distribution service identification information” in the present invention, the content ID corresponds to “content identification information” in the present invention, and the program identification information database 1041 corresponds to the present invention. Corresponds to the “distribution service identification information database”.

  The copyright information database 1042 is divided into a master database 1042a and a sales history database 1042b. The copyright information stored in the master database 1042a includes an author, a selling price, a copyright fee rate, and the like. A large number of such information is registered in association with the content ID. The copyright information stored in the sales history database 1042b includes the sales frequency (download load count), the sales amount, the copyright fee payment amount, etc., and a lot of these information are associated with the content ID as one set. It is registered. The sales frequency is recorded separately for each user's age group and sex. Here, the copyright information database 1042 corresponds to “copyright information storage means” and “copyright information database” in the present invention.

  The copyright management apparatus 104 also has a CPU (Central Processing Unit) 1043 that controls the entire copyright management apparatus 104, a ROM (Read Only Memory) 1044 that stores basic programs executed by the CPU 1043, and a work for the CPU 1043. A RAM (Random Access Memory) 1045 that functions as a memory, a hard disk device (HDD) 1046 that stores basic programs such as an operating system, a floppy (registered trademark) disk device 1047 that reads and writes data from and to a floppy (registered trademark) disk, And a LAN I / F 1048 for connecting to the local area network 112. Here, the CPU 1043 mainly corresponds to “copyright management means” in the present invention.

  Now, referring back to FIG.

  The ground station 2 has a function of performing digital satellite broadcasting, and performs processing such as multiplexing and encryption on program materials and various control information sent from each server of the distribution apparatus 1. These are transmitted to the satellite 3 on the digital satellite broadcast radio wave. More specifically, the ground station 2 determines the TV program material data (video data and audio data) from the TV program material server 106 and the music material data (audio data) for a plurality of audio channels from the music material server 107. Audio additional information from the audio additional information server 108, GUI data from the GUI data server 109, individual information encrypted by the encryption device 105, and from the program identification information database 1041 of the copyright management device 104 The program identification information is received, and the program identification information is compressed, or a part thereof is subjected to encryption processing using a predetermined encryption key and then multiplexed and transmitted.

  Here, video data of the TV program material data transmitted from the ground station 2 is compressed by, for example, MPEG (Moving Picture Experts Group) 2 system, and audio data of the TV program material data is, for example, MPEG2 audio system. It comes to be compressed by. The music material data (audio data) of each audio channel transmitted from the ground station 2 is compressed by two different systems, for example, the MPEG2 audio system and the ATRAC (Adaptive Transform Acoustic Coding) system.

  As the satellite 3, for example, a communication satellite (CS) equipped with a plurality of transponders is used. Here, the transponder is a relay device having a function of receiving a signal from the ground station 2, performing a process such as amplification and frequency conversion, and retransmitting the signal to the ground. For example, the transponder has a transmission capability of 30 Mbps. have.

  The receiving facility 4 includes a parabolic antenna 4a for receiving radio waves from the satellite 3, a receiving device 4b called an IRD (Integrated Receiver Decoder), a storage device 4c capable of recording video data, audio data, and the like, a television And a receiver 4d. The parabola antenna 4a is provided with a frequency converter 4e called LNB (Low Noise Block Downconverter), which converts the received frequency into a predetermined frequency and supplies it to the receiving device 4b.

  The receiving device 4b is for selecting a signal of a predetermined channel from the received signal and demodulating video data and audio data. The receiving device 4b also has a function of forming a list page of music to be distributed, an information page of each music, and a screen for EPG and supplying the screen to the television receiver 4d. The receiving device 4b is connected to a customer management computer 6a of the customer management center 6 via, for example, a telephone line 5. As will be described later, an IC card (not shown) capable of storing various types of information is inserted into the receiving device 4b. When the music data is downloaded (recorded in the storage device 4c), the fact is stored as download information in the IC card. The information stored in the IC card is periodically sent to the customer management computer 6a of the customer management center 6 via the telephone line 5. The IC card is shipped with an individual key Km, IC card ID, etc. for each subscriber stored therein. Here, the individual key Km is used when performing descrambling (decryption) processing at the time of downloading, and the IC card ID is used when performing accounting processing. The detailed configuration and operation of the receiving device 4b and the IC card will be described later.

  The storage device 4c is for storing the audio data of the downloaded music piece. For example, an MD (mini disc) device, a DAT (digital audio tape) device, a DVD (digital video disc) device, or the like can be used. . Further, as the storage device 4c, a hard disk or a CD-R (rewritable CD) provided in the personal computer can be used.

  In the present embodiment, for example, an MD device corresponding to a communication standard called IEEE1394 is used as the storage device 4c. The IEEE 1394 standard is a bidirectional serial interface standard that enables high-speed data transfer. For example, the IEEE 1394 standard is adopted as a data communication standard between a personal computer and a digital video camera. By connecting the receiving device 4b and the storage device 4c with this IEEE 1394 standard interface, along with the audio data of the music selected by the receiving device 4b, the jacket of the CD in which the music is stored and sold, etc. Still image data to be represented, text data such as lyrics data and artist information can be transferred to the storage device 4c at high speed and stored in the received signal form. The detailed configuration of the storage device 4c will be described later.

In the reception facility 4 at each subscriber's house having the above-described configuration, a digital television broadcast transmitted from the distribution device 1 via the ground station 2 and the satellite 3 is received, so that a music program is received by the television receiver 4d. And the accompanying music can be viewed. Specifically, a GUI screen as shown in FIG. 8 to be described later is displayed on the television receiver 4d based on the sent GUI data, and the viewer can perform a predetermined operation while watching the GUI screen. By performing the operation, it is possible to view an information page about each song, to audition each song, or to download audio data of a desired song and store it in the storage device 4c. Here, the television receiver 4d corresponds to a specific example of “display means” in the present invention.

  The customer management center 6 includes a customer management computer 6a and a customer information database 6b. The customer management computer 6a performs an appropriate billing process based on the download information (purchase information) sent from the receiving device 4b at each subscriber's house, charges the subscriber for a viewing fee, and sends to the distribution device 1 On the other hand, it is for reporting the download situation for each music piece. The customer information database 6b stores unique customer information for all customers. This customer information includes a customer ID, an IC card ID, an address, a telephone, and the like. Here, the IC card ID is an ID unique to the IC card inserted into the receiving device 4b at the subscriber's home as described above. The reason for reporting the download status of each song to the distribution apparatus 1 is that the copyright holder can be paid to the copyright holder according to the frequency of use of the song to be distributed, as will be described later. It is for doing so. Here, the customer management center 6 corresponds to the “customer management center” in the present invention.

  FIG. 3 shows the configuration of the ground station 2 in FIG. As shown in this figure, the ground station 2 includes a TV program material registration processing unit 31 that performs registration processing of TV program material data (video data and audio data) from the TV program material server 106 of the distribution apparatus 1, and music A music material registration processing unit 32 that performs registration processing of music material data (audio data) from the material server 107, an audio additional information registration processing unit 33 that performs registration processing of audio additional information from the audio additional information server 108, and a GUI. A GUI material registration processing unit 34 that performs registration processing of GUI data from the data server 109 is provided.

  The ground station 2 further compresses and packetizes the AV (audio / video) server 35 that holds the TV program material data from the TV program material registration processing unit 31, and the material data held by the AV server 35. And a television program sending unit 39 for sending out.

  The ground station 2 further encodes an MPEG audio encoder 36A that encodes audio data from the music material registration processing unit 32 using the MPEG2 audio system, and an MPEG audio server that holds MPEG audio data obtained by encoding by the MPEG audio encoder 36A. 40A and an MPEG audio transmission unit 43A that packetizes and transmits MPEG audio data held by the MPEG audio server 40A.

  The ground station 2 further includes an ATRAC encoder 36B that encodes audio data from the music material registration processing unit 32 in the ATRAC system, an ATRAC audio server 40B that holds ATRAC data obtained by being encoded by the ATRAC encoder 36B, An ATRAC audio transmission unit 43B that packetizes and transmits ATRAC data held by the ATRAC audio server 40B.

  The ground station 2 further packetizes and transmits the voice additional information database 37 that holds the voice additional information from the voice additional information registration processing unit 33 and the voice additional information held by the voice additional information database 37. And an additional information transmission unit 41.

  The ground station 2 further performs authoring processing on the GUI material database 38 that holds the GUI data from the GUI material registration processing unit 34, and the GUI data held by the GUI material database 38, and packetizes and transmits the data. And a GUI authoring processing unit 42.

  The ground station 2 further processes the individual information processing unit 46 for processing the individual information from the copyright management apparatus 104 of the distribution apparatus 1 and the program identification information from the copyright management apparatus 104 of the distribution apparatus 1. The program identification information processing unit 47 is provided.

  The ground station 2 further applies a predetermined amount of data and a part of information from each of the transmission units 39, 43A, 43B, 41, the GUI authoring processing unit 42, the individual information processing unit 46, and the program identification information processing unit 47. And a multiplexing unit 44 for time-division multiplexing (time division multiplexing) of these data and information, and a predetermined process for the output of the multiplexing unit 44 Then, a radio wave transmission unit 45 that transmits toward the satellite 3 from an antenna (not shown) is provided.

  In the ground station 2 configured as described above, the TV program material data from the TV program material registration processing unit 31 is registered in the AV server 35. This material data is video data and audio data. The material data registered in the AV server 35 is sent to the television program transmission unit 39, where the video data is compressed by, for example, the MPEG2 system, and the audio data is compressed by, for example, the MPEG2 audio system and packetized. The output of the television program sending unit 39 is sent to the multiplexing unit 44.

  Also, audio data which is music material data from the music material registration processing unit 32 is supplied to the MPEG2 audio encoder 36A and the ATRAC encoder 36B, and after being encoded here, the MPEG audio server 40A and the ATRAC audio server 40B, respectively. Registered in The MPEG audio data registered in the MPEG audio server 40A is sent to the MPEG audio sending unit 43A, packetized here, and sent to the multiplexing unit 44. The ATRAC data registered in the ATRAC audio server 40B is sent to the ATRAC audio sending unit 43B as quadruple speed ATRAC data, packetized here, and then sent to the multiplexing unit 44.

  Further, the voice additional information from the voice additional information registration processing unit 33 is registered in the voice additional information database 37. The audio additional information registered in the audio additional information database 37 is sent to the audio additional information sending unit 41, packetized here, and then sent to the multiplexing unit 44.

  Also, the GUI data from the GUI material registration processing unit 34 is registered in the GUI material database 38. The GUI data registered in the GUI material database 38 is sent to the GUI authoring processing unit 42, where the GUI screen data is processed and packetized, and then sent to the multiplexing unit 44. Here, the GUI data includes jacket still image information, song lyrics information, artist concert information, and the like. Here, the still image information is image data of 640 × 480 pixels compressed by, for example, JPEG (Joint Photographic Experts Group), and the lyric information is text data of, for example, 800 characters or less and is packetized. .

  The individual information input to the individual information processing unit 46 is packetized here and sent to the multiplexing unit 44, and the program identification information input to the program identification information processing unit 47 is packetized here, It is sent to the multiplexing unit 44.

  In the multiplexing unit 44, the video packet and audio packet from the television program transmission unit 39, the audio packet from the MPEG audio transmission unit 43A, the quadruple speed audio packet from the ATRAC audio transmission unit 43B, and the audio additional information transmission unit 41 are provided. Time-division multiplexing of the audio additional information packet, the GUI data packet from the GUI authoring processing unit 42, the individual information packet from the individual information processing unit 46, and the program identification information packet from the program identification information processing unit 47 Is done. At the same time, encryption is performed using the key information from the key information server 10 (FIG. 1). At that time, as will be described later, the MPEG audio packet, the quadruple speed ATRAC audio packet, and the program identification information packet are encrypted with a predetermined encryption key and then multiplexed.

  The output of the multiplexing unit 44 is sent to the radio wave transmission unit 45, where processing such as addition of an error correction code, modulation and frequency conversion is performed, and then transmitted from an antenna not shown to the satellite 3.

  FIG. 4 shows an example of data transmitted from the ground station 2. Each data shown in this figure is actually time-axis multiplexed. As shown in FIG. 4, the period from time t1 to time t2 is one event, and the next event is from time t2. An event is a unit that changes the lineup of music, and is usually in units of 30 minutes or 1 hour. For example, it may be possible to broadcast 20th to 11th of the top 20 of the latest hit songs at the previous event and broadcast 10th to 1st at the later event.

  As shown in FIG. 4, in the event from the time t1 to the time t2, a music program having a predetermined content A1 is broadcast by a normal video program broadcast. In an event starting from time t2, a music program having a predetermined content A2 is broadcast. This normal music program is broadcasted with moving images and audio.

  For example, 10 channels from CH1 to CH10 are prepared as audio channels. At this time, in each audio channel CH1, CH2, CH3,... CH10, the same music is repeatedly transmitted during one event. That is, in the event from the time t1 to the time t2, the music B1 is repeatedly transmitted on the audio channel CH1, the music C1 is repeatedly transmitted on the audio channel CH2, and similarly, the music K1 is repeatedly transmitted on the audio channel CH10. Is done. In the event starting from time t2, the music B2 is repeatedly transmitted on the audio channel CH1, the music C2 is repeatedly transmitted on the audio channel CH2, and the music K2 is repeatedly transmitted similarly on the audio channel CH10. Such repeated transmission processing is similarly performed for other MPEG audio channels and quadruple speed ATRAC audio channels.

  In FIG. 4, the same numbers in (), which are the channel numbers of the MPEG audio channel and the quadruple speed ATRAC audio channel, relate to the same music. Also, the numbers in parentheses that are the channel numbers of the audio additional information are the audio additional information added to the audio data having the same channel number. Furthermore, still image data and text data transmitted as GUI data are also formed for each channel.

  Although the individual information packet and the program identification information packet are not shown in FIG. 4, these information packets are also repeatedly transmitted as in the case of each audio channel.

  FIG. 5 shows various data transmission methods and reconstruction methods as shown in FIG. As shown in FIGS. 5A to 5D, various types of data are time-division multiplexed by MPEG2 transport packets and transmitted. Each transport packet has a header, and information indicating the type of the packet is described in the header. In the receiving device 4b, each data is reconstructed as shown in FIGS. 5E to 5H by using information indicating the type of packet in the header of each packet.

  Next, the receiving device 4b in the receiving facility 3 of each subscriber house in FIG. 1 will be described.

  FIG. 6 shows an example of the configuration of the receiving device 4b in FIG. As shown in this figure, the receiving device 4b includes an input terminal T1, an analog video output terminal T2, analog audio output terminals T3 and T4, an optical digital output interface 59, an IEEE 1394 interface 60, and a man-machine interface as external terminals or interfaces. 61, an IC card slot 62, and a modem 63. The receiving device 4b includes a control CPU (central processing unit) 58.

  The input terminal T1 is a terminal to which a reception signal converted into a predetermined frequency by the frequency converter 4e (FIG. 1) of the parabolic antenna 4a is input. The analog video output terminal T2 is a terminal that supplies an analog video signal to the television receiver 4d. The analog audio output terminal T3 is a terminal that supplies an analog audio signal to the television receiver 4d. The analog audio output terminal T4 is a terminal for supplying an analog audio signal to an analog input storage device. The optical digital output interface 59 is compliant with IEC958, and sends PCM audio data to an optical fiber cable. The IEEE 1394 interface 60 sends video data, audio data, various commands, and the like to an IEEE 1394 standard signal cable. The man-machine interface 61 sends an input from a remote commander (hereinafter referred to as a remote controller) 64 by the user to the control CPU 58. An IC card 65 is inserted into the IC card slot 62. The modem 63 is connected to the customer management computer 6 a of the customer management center 6 through the telephone line 5.

  The receiving device 4b further includes a tuner 51 connected to the input terminal T1, a descrambler 52 provided at the subsequent stage of the tuner 51, a transport unit 53 provided at the subsequent stage of the descrambler 52, and the transformer. An MPEG audio decoder 54 and an MPEG video decoder 55 provided in the subsequent stage of the port unit 53, a digital-analog converter 56 provided in the subsequent stage of the MPEG audio decoder 54, and 1 provided in the subsequent stage of the digital-analog converter 56 An input 2-output switch SW1 and an NTSC converter 57 provided at the subsequent stage of the MPEG video decoder 55 are provided.

  The output terminal of the NTSC converter 57 is connected to the analog video output terminal T2. The output terminals of the switch SW1 are connected to analog audio output terminals T3 and T4, respectively. The MPEG audio decoder 54 is also connected to the optical digital output interface 59. The transport unit 53 is also connected to the IEEE 1394 interface 60.

  Based on the setting signal from the control CPU 58, the tuner 51 selects a signal having a predetermined reception frequency from the reception signals supplied from the terminal T1, and further performs demodulation processing and error correction processing to perform MPEG transport stream. Is output. The descrambler 52 receives the MPEG transport stream from the tuner 51, receives descramble key data (individual key Km) stored in the IC card 65 via the IC card slot 62 and the control CPU 58, and receives the key. Descramble using the data. The descrambler 52 also descrambles the received individual information packet to extract the individual information. Here, the individual information includes an IC card ID, a work key Kw number, contract information indicating the contents of the reception contract, and the like. The contract information includes a contract service ID indicating a channel with a viewing contract, a contract event ID indicating a program with a viewing contract, a contract type indicating whether or not a desired music can be downloaded, a program purchase upper limit, The call designation date and time and the call designation amount are included. The descrambler 52 collates the IC card ID included in the extracted individual information with the IC card ID recorded on the IC card 65, and determines that it is an individual information packet addressed to itself if they match. The contents of the IC card 65 are updated based on the received individual information. However, this individual information is not always sent, but only when the subscriber changes the contract contents or the like. The descrambler 52 also descrambles the received program identification information packet, extracts the service ID and event ID, and records them on the IC card 65 as purchase record data. The operation of the descrambler 52 will be described in more detail with reference to FIG. The transport unit 53 receives a command input from the remote controller 64 by the user via the man-machine interface 61 and the control CPU 58, and extracts MPEG video data and MPEG audio data of a desired television program from the transport stream. . The MPEG video decoder 55 converts the MPEG video data supplied from the transport unit 53 into video data before data compression. The MPEG audio decoder 54 converts the MPEG audio data supplied from the transport unit 53 into audio data (PCM audio data) before data compression. The digital-analog converter 56 converts the audio data supplied from the MPEG audio decoder 54A into an analog audio signal. The switch SW1 selectively supplies the analog audio signal supplied from the digital-analog converter 56 to the analog audio output terminals T3 and T4. The NTSC converter 57 converts the video data decoded by the MPEG video decoder 55 into an NTSC composite video signal.

The control CPU 58 performs processing of the entire receiving device 4b. Further, the control CPU 58 receives a command input by the user using the remote control 64 to the receiving device 4b via the man-machine interface 61. A modem 63 is connected to the control CPU 58. Information necessary for charging is stored in a predetermined storage area of a non-illustrated nonvolatile memory of the IC card 65. Information on the IC card 65 is sent to the customer management center 6 (FIG. 1) via the telephone line 5 using the modem 63. Here, the IC card 65 corresponds to a specific example of “history holding means” in the present invention, and the modem 63 corresponds to a specific example of “history transmission means” in the present invention.

  Also, the transport unit 53 takes in the audio additional information and GUI data shown in FIG. 4 from the transport stream, and sends them to the control CPU 58. Based on these data, the control CPU 58 forms a list page screen, an information page screen of each music piece, or EPG screen data. The screen data thus formed is written in a predetermined area of the buffer memory in the MPEG video decoder 55. As a result, as shown in FIG. 10, it is possible to display a broadcast music list page, each music information page, or an EPG screen in a designated area on the screen. ing.

  FIG. 7 illustrates a connection mode between the receiving device 4b and the storage device 4c. As shown in FIG. 7A, the receiving device 4b includes an analog audio output terminal Aout (terminal T4 in FIG. 6), a digital audio output terminal Dout such as the IEC958 standard for sending PCM audio data through an optical cable, IEEE1394, and the like. Digital interface terminal Dif. Accordingly, the storage device 4c has only an analog audio input terminal Ain as shown in FIG. 7B, and a PCM audio input terminal Din such as IEC958 as shown in FIG. 7C. As shown in FIG. 7 (d), it is possible to connect a device provided with a bidirectional digital interface terminal Dif such as IEEE1394.

  As shown in FIG. 7B, when the storage device 4cA having only the analog audio input terminal Ain is used as the storage device, the analog output terminal Aout of the receiving device 4b and the analog input of the storage device 4cA are used. Terminal Ain is connected by an analog cable.

  7C, when the storage device 4cB having the PCM audio input terminal Din such as IEC958 is used as the storage device, the digital output terminal Dout of the receiving device 4b and the storage device The digital input terminal Din of 4 cB is connected by, for example, an IEC958 optical fiber cable.

  As shown in FIG. 7D, when the storage device 4cC having the bidirectional digital interface terminal Dif such as IEEE1394 is used as the storage device, the digital interface terminal Dif of the receiving device 4b and the storage The digital interface terminal Dif of the device 4cC is connected by an IEEE 1394 digital interface cable.

  As shown in FIG. 7B, when a storage device having no digital input terminal is used, the downloaded MPEG audio data is subjected to MPEG2 decoding processing in the receiving device 4b. Further, the signal is further converted from digital to analog and output from an analog audio output terminal Aout. Then, the data is sent from the receiving device 4b to the storage device 4cA via an analog cable. In this case, control signals are exchanged between the receiving device 4b and the storage device 4cA using wireless communication such as infrared rays or wired communication using a cable to check connection relations and download operations. It is also possible to configure.

  As shown in FIG. 7C, when the storage device 4cB having the PCM audio input terminal Din is used as the storage device, the downloaded MPEG audio data is decoded into the MPEG2 in the receiving device 4b. Processing is performed, and PCM audio data is output from the receiving device 4b. Then, the data is transmitted from the receiving device 4b to the storage device 4cB via, for example, an IEC958 optical cable. In this case as well, the control signal is exchanged between the receiving device 4b and the storage device 4cA using wireless communication such as infrared rays or wired communication using a cable, thereby confirming the connection relationship and confirming the download operation. It is also possible to do.

  As shown in FIG. 7D, when an MD device having a bidirectional digital interface terminal Dif such as IEEE1394 is used as the storage device 4cC, the downloaded quadruple speed ATRAC data is directly received by the receiving device. 4b to the storage device 4cC via the IEEE 1394 bus 16C. Further, the MD device as the storage device 4cC can accumulate text data such as jacket data and lyrics data together with audio data of the music selected by the receiving device 4b.

  As described above, the equipment used as the storage device 4c can be of three systems: one that inputs analog data, one that inputs PCM audio data, and one that inputs ATRAC data.

  FIG. 8 shows an example of the configuration of the MD device of the IEEE 1394 standard as the storage device 4c in FIG. As shown in this figure, the storage device 4c includes an IEEE 1394 interface 71, an optical digital input interface 72, an analog audio input terminal T12, and an analog audio output terminal T13. The IEEE 1394 interface 71 is directly connected to the recording / reproducing unit 75 and is connected to the recording / reproducing unit 75 via the ATRAC encoder 74. The optical digital input interface 72 is connected to the recording / reproducing unit 75 via the ATRAC encoder 74. The analog audio input terminal T12 is connected to the ATRAC encoder 74 via an analog-digital converter (ADC) 73. The analog audio output terminal T13 is connected to the recording / reproducing unit 75 via a digital-analog converter (DAC) 78 and an ATRAC decoder 77. A disk 76 is set in the recording / reproducing unit 75. The recording / reproducing unit 75 performs recording / reproduction with respect to the disk 76. Although not shown here, the IEEE 1394 standard MD device is provided with a control CPU for performing overall control and a man-machine interface. Next, the operation of the music distribution receiving system configured as described above will be described.

  First, the operation of the receiving device 4b shown in FIG. 7 will be described.

  In the receiving device 4b shown in FIG. 7, when the user selects the channel of the music distribution receiving system described so far, a GUI screen as shown in FIG. 10 is displayed on the screen of the television receiver 4d.

  At this time, the reception signal input to the terminal T1 is supplied to the tuner 51. The tuner 51 selects a signal having a predetermined reception frequency from the reception signals based on the setting signal from the control CPU 58, and further performs demodulation and error correction processing to output an MPEG transport stream.

  The output of the tuner 51 is supplied to the descrambler 52. In the descrambler 52, descrambling key data (individual key Km) stored in the IC card 65 is input via the IC card slot 62 and the control CPU 58, and an MPEG transport stream is generated using this key data. Descrambling is performed. The descrambled MPEG transport stream is sent to the transport unit 53.

  A command input from the remote controller 64 by the user is input to the transport unit 53 via the man-machine interface 61 and the control CPU 58. The transport unit 53 extracts MPEG video data and MPEG audio data of a desired television program from the transport stream according to the command, and sends them to the MPEG video decoder 55 and the MPEG audio decoder 54, respectively.

  The MPEG video data sent to the MPEG video decoder 55 is converted into video data before being compressed here, and then converted into a composite video signal by the NTSC converter 57, and then received from the analog video output terminal T2 as a television receiver. Is output to the machine 4d. The MPEG audio data sent to the MPEG audio decoder 54 is converted into audio data before data compression here, and then converted into an analog audio signal by the digital-analog converter 56, and then from the analog audio output terminal T3 to the television. It is output to the receiver 4d.

  When a music is selected from the music list 21B on the GUI screen shown in FIG. 10 and the audio data of the music is auditioned, MPEG audio data is extracted by the transport unit 53, and this MPEG audio data is converted into an audio decoder. After being decoded by 54 and digital-analog converted by the digital-analog converter 56, the signal is output from the analog audio output terminal T3 to the television receiver 4d through the switch SW1.

  Further, when the download button 28 is pressed on the GUI screen shown in FIG. 10 and audio data is downloaded, the audio data is extracted by the transport unit 53, and the atelog audio output terminal T4, the optical digital output interface 59 is extracted. Audio data is output from any one of the IEEE1394 interface 60.

  Here, as shown in FIG. 7D, the storage device 4c is connected to the IEEE 1394 interface 60 (corresponding to the digital interface terminal Dif in FIG. 7D) of the receiving device 4b, and is an MD device of the IEEE 1394 standard. In the case of the storage device 4cC, the quadruple-speed ATRAC data is extracted by the transport unit 53 and sent to the storage device 4c via the IEEE1394 interface 60. At this time, jacket data compressed by the JPEG method is extracted by the transport unit 53 and sent to the storage device 4c via the IEEE 1394 interface 60 (digital interface terminal Dif). Further, at this time, text data such as lyrics and artist profiles is extracted by the transport unit 53 and sent to the storage device 4 c via the IEEE 1394 interface 60.

  Further, as shown in FIG. 7C, the storage device 4c includes an IEEE 1394 interface connected to the optical digital output interface 59 (corresponding to the digital output terminal Dout in FIG. 7C) of the receiving device 4b. If the storage device is not a storage device 4cB, MPEG audio data is extracted by the transport unit 53, decoded by the MPEG audio decoder 54, and then PCM audio data via the optical digital output interface 59 (digital output terminal Dout). Is sent to the storage device 4cB.

  As shown in FIG. 7B, when the storage device 4c is a storage device 4cA connected to the analog audio output terminal T4 (audio output terminal Aout) of the receiving device 4b and capable of inputting only analog audio. The MPEG audio data is extracted by the transport unit 53, decoded by the MPEG audio decoder 54, and digital-analog converted by the digital-analog converter 56, and then passed through the switch SW1 to the analog audio output terminal T4 (audio output). From the terminal Aout) to the storage device 4cA.

  Next, a recording operation in the storage device 4c in FIG. 8 will be described. Here, description will be made assuming that the storage device 4c is a storage device 4cC such as an MD device of the IEEE1394 standard.

  When the IEEE 1394 interface 71 of the storage device 4c is connected to the IEEE 1394 interface 60 of the receiving device 4b shown in FIG. Such still image data is input from the IEEE 1394 interface 71 and recorded on the disk 76 by the recording / reproducing unit 75 as it is. As will be described later, at this time, each data is recorded on the disk 76 in the extended MD format.

  When PCM audio data is input from the outside to the optical digital input interface 72, the input PCM audio data is encoded by the ATRAC encoder 74 and then recorded on the disk 76 by the recording / reproducing unit 75.

  When an analog audio signal is input from the outside to the analog audio input terminal T12, the input analog audio signal is analog-to-digital converted by the analog-to-digital converter 73, encoded by the ATRAC encoder 74, and then recorded and reproduced. 75 is recorded on the disk 76.

  That is, in this storage device 4c, only when the receiving device 4b is connected by the IEEE 1394 bus, the lyrics data and the still image data of the jacket are recorded together with the audio data of the music, and the connection with the optical digital interface In the case of analog audio input, only audio data is recorded.

  In the storage device 4c, a reproduction signal can be output from the IEEE 1394 interface 71 or the analog audio output terminal T13 during reproduction. When the lyrics data, jacket data, etc. are recorded together with the audio data of the music on the disk 76, when outputting the reproduction signal from the IEEE 1394 interface 71, the music data is output to an IEEE 1394 compatible audio device (such as an amplifier). In addition, it is possible to display lyrics data, jacket data, and the like on an IEEE1394 compatible display, or to print on an IEEE1394 compatible printer.

  As described above, the storage device 4c according to the present embodiment can record and reproduce lyrics data, jacket data, and the like together with music audio data.

  FIG. 9 shows an extended MD format that enables recording and reproduction of lyrics data, jacket data, and the like along with audio data of music. As shown in this figure, the audio data of the music is recorded in the main data area by the ATRAC method. This is the same as the current MD format. In the extended MD format, the jacket data, lyrics data, and the like described above are further recorded in the auxiliary data (Aux Data) area of 2.8 Mbytes. By using such an extended MD format, it is possible to record and reproduce jacket data, lyrics data, and the like together with the audio data of the music. In addition, compatibility with the current MD format can be maintained.

  Next, with reference to FIG. 10, the viewer's operation in the receiving facility 3 will be described in detail.

  When the above-described music program broadcast is received by the reception facility 3 at each subscriber's house, a GUI screen as shown in FIG. 10 is displayed on the television receiver 4d. In the television program display area 21A at the upper left of this screen, a moving image based on the music program provided from the television program material server 106 (FIG. 1) of the distribution apparatus 1 is displayed. In the upper right part of the screen, a list 21B of music of each channel provided from the music material server 107 (FIG. 1) of the distribution apparatus 1 and broadcast on the audio channel is displayed. In the lower left of the screen, a text display area 21C and a jacket display area 21D for displaying music accompanying information provided from the GUI data server 109 of the distribution apparatus 1 are set. Further, on the right side of the screen, a lyrics display button 22, a profile display button 23, an information display button 24, a reserved recording button 25, a reserved list display button 26, a recording history display button 27, and a download button 28 are displayed.

  The viewer searches for a song of interest while watching the title of the song displayed in the list 21B. When a musical piece of interest is found, the arrow key of the remote commander is operated to move the cursor to the musical piece, and then the remote commander enter key attached to the receiving device 4b is pressed. As a result, it is possible to audition the music with the cursor. That is, in each audio channel, the same music is repeatedly broadcasted for a predetermined unit time, so that the screen of the TV program display area 21A remains unchanged and the audio channel of the music is switched to listen to the music. it can. At this time, a still image of the CD jacket of the music is displayed in the jacket display area 21D.

  In this state, when the cursor is moved to the lyrics display button 22 and the enter key is pressed (hereinafter, the cursor is moved to the button and the operation of pressing the enter key is referred to as pressing the button), the lyrics of the music are displayed as audio data in the text display area 21C. It is displayed at the timing synchronized with. Similarly, when the profile display button 23 or the information display button 24 is pressed, the artist's profile or concert information corresponding to the music is displayed in the text display area 21C. Thus, the viewer can know what kind of music is currently distributed, and can know detailed information about each music.

  The viewer presses the download button 28 in order to purchase the sampled music. When the download button 28 is pressed, the audio data of the selected music is downloaded and stored in the storage device 4c. Along with the audio data of the music, the lyrics data, artist profile information, jacket still image data, and the like can also be downloaded. Each time a song is downloaded, a purchase record (specifically, a service ID and an event ID) related to the download is stored in the IC card 65 in the receiving device 4b. Information stored in the IC card 65 is uploaded to the customer management center 6 regularly (for example, once a month). This makes it possible to properly pay the copyright fee for the downloaded music. This music download and upload processing will be further described later.

  In addition, the viewer presses the reservation recording button 25 to make a download reservation in advance. When this button 25 is pressed, the GUI screen is switched, and a list of songs that can be reserved is displayed on the entire screen. This list can display music searched in units of one hour, one week, a genre, or the like. When the viewer selects a song for which a download reservation is to be made from this list, the information is registered in the receiving device 4b. If it is desired to confirm a song that has already been reserved for download, a list of reserved songs can be displayed on the entire screen by pressing the reserved list display button 26. The music reserved in this way is downloaded at the reserved time and recorded in the storage device 4c.

  When the viewer wants to confirm the downloaded music, the viewer can press the recording history button 27 to display a list of the music already downloaded on the entire screen.

  As described above, in the reception facility 3, the music list is displayed on the GUI screen of the television receiver 14. When the viewer selects a song in accordance with the display on the GUI screen, the viewer can listen to the song, and can know the lyrics of the song, the artist's profile, and the like. The viewer can also use the GUI screen to download and reserve music, display a download history, a reserved music list, and the like.

  Next, the processing when the viewer purchases the music of the audio channel in the receiving facility 4, that is, the processing when downloading the music will be described in more detail. In this case, charging for downloading the music of the audio channel is performed by the IPPV method described above.

  When a music is selected from the music menu displayed on the television receiver 4d and the download button 28 is pressed, the control CPU 58 of the receiving device 4b is recorded in a nonvolatile memory (not shown) in the IC card 65. The contract type is checked, and it is determined whether or not a contract for purchasing an IPPV program (here, a music piece) is made. When it is determined that this contract is not concluded, the control CPU 58 (FIG. 6) prohibits downloading of music.

  On the other hand, as a result of checking the contract type, if it is determined that a contract that enables the purchase of the IPPV program is made, the control CPU 58 records the total viewing amount (purchase amount) up to that point in the nonvolatile memory. It is determined whether or not the program purchase upper limit is reached. As a result, when the total viewing amount exceeds the program purchase upper limit, the control CPU 58 prohibits downloading of music. Here, the program purchase upper limit is sent as part of the individual information from the customer management center 6 via the distribution device 1 and recorded in the non-volatile memory of the IC card 65.

  When the total viewing amount is less than the program purchase upper limit amount, the control CPU 58 uses the service ID and event ID as part of the received program identification information as viewing history data, and the nonvolatile memory in the IC card 65. Write to. Then, the control CPU 58 extracts the PPV fee data from the received program identification information, adds it to the total viewing amount in the nonvolatile memory, and writes this addition result in the nonvolatile memory as a new total viewing amount. Thereafter, the descrambling process described above is performed, and the designated music is downloaded.

  Next, processing for uploading viewing history (purchase record) data in the IC card 65 to the customer management center 6 will be described.

  The process of uploading the viewing history data in the IC card 65 to the customer management center 6 via the telephone line 5 is performed when any one of the following three conditions is satisfied.

  (Condition 1) When the free space of the viewing history storage area in the non-volatile memory of the IC card 65 becomes a predetermined value or less.

  (Condition 2) When the call designation date and time recorded in advance in the nonvolatile memory of the IC card 65 arrives

  (Condition 3) When the total amount of viewing exceeds the specified calling amount recorded in the non-volatile memory of the IC card 65

  Here, (Condition 2) and (Condition 3) are provided in order to make it impossible for the subscriber to perform unlimited downloading of music by disconnecting the receiving device 4b from the telephone line 5. It is. As described above, the call designation date and time and the call designation amount are included as part of the received individual information, and are extracted from the individual information and recorded in the nonvolatile memory of the IC card 65. It is a thing.

  When any one of the above conditions is satisfied, the control CPU 58 starts the viewing history data upload process for the customer management center 6. When the upload process is normally completed, the total viewing amount in the IC card 65 is reset to zero.

  Next, characteristic operations and actions in the music distribution receiving system of the present embodiment will be described.

  First, with reference to FIG. 11 and FIG. 12, an outline of the flow of processing centering on copyright management for music distributed in this system will be described.

  The author C provides the distribution company with the music to be charged for the IPPV system and the copyright information about the music (step S101 in FIG. 11). The music is provided in the form of a CD, for example. The distribution company inputs the music provided by the copyright holder C from the music input terminal 102 of the distribution device 1 and stores it in the music material server 107 in the distribution device 1 (step S102). The distribution company also inputs the copyright information provided by the copyright holder C from the copyright information input terminal 103 of the distribution apparatus 1 and stores it in the copyright information database 1042 in the distribution apparatus 1 (step S103). . The copyright information stored in the copyright information database 1042 includes the content ID of the music, the author (song composer, songwriter, etc.), the selling price of the music, and the copyright rate.

  The distribution company determines the TV program, music, and the date and time for broadcasting them, and inputs such information from the program organization terminal 101 as program organization information. The input program organization information is stored in the program organization server 111 (step S104). As already described, the program organization information includes the title of the TV program, the event ID that is identification information unique to the program, the broadcast date and time, the titles of a plurality of songs distributed in parallel with the TV program, the content ID of each song, There are a service ID indicating subchannel (audio channel) allocation of each music piece, music accompanying information associated with each music piece, and the like. The accompanying music information is related to the artist who is playing (or singing) the song, the songwriter, the composer, the image of the CD jacket containing the song, the release date of the CD, and the artist. Concert information etc. Among these program organization information, the service ID, event ID, and broadcast date and time are associated with the content ID and stored in the program identification information database 1041 of the copyright management apparatus 104 as program identification information (step S105). .

  When the set broadcast date / time is reached, TV program data, music data, audio additional information, and GUI data are read from the TV program material server 106, the music material server 107, the audio additional information server 108, and the GUI data server 109, respectively. To the ground station 2. The program identification information is read from the program identification information database 1041 and sent to the ground station 2 (step S106). Further, the individual information for each subscriber is sent from the customer management center 6 to the encryption device 105 of the distribution device 1 (step S107). The individual information is encrypted by the encryption device 105 using the encryption key stored in the encryption key database 105a and sent to the ground station 2 (step S108). The ground station 2 time-division multiplexes the TV program data, music data, audio additional information, GUI data, program identification information, and individual information sent from the distribution device 1 and transmits them to the satellite 3 (step S109). . At this time, the music data and the program identification information are encrypted and then multiplexed.

  The TV program data and music data transmitted from the ground station 2 via the satellite 3 are received by the receiving facility 4 at the subscriber's house and reproduced by the television receiver 4d (step S110 in FIG. 12). However, since the music data is encrypted, the viewer cannot decrypt the music data unless a purchase operation is performed.

  When the viewer performs an operation for purchasing music (step S111; Y), a decryption key (individual key Km) is obtained from the IC card 65 set in the receiving device 4b, and the music data is decrypted. (Step S112). The decrypted music data is recorded in the storage device 4c (step S113). At this time, the service ID and event ID of the downloaded music are recorded on the IC card 65 as purchase records (viewing records) (step S114). This purchase record cannot be deleted from the outside.

  The purchase record recorded in the IC card 65, when the regular reporting time comes (step S115; Y), together with the IC card ID of the IC card 65, via the telephone line 5, the customer management computer 6a of the customer management center 6 (Step S116). The regular reporting period is, for example, every month.

  The customer management computer 6a of the customer management center 6 performs billing processing with reference to the customer information database 6b based on the purchase record and IC card ID sent from each subscriber. Specifically, the viewing fee (download fee) is calculated, and a bill is issued to the subscriber (step S117). This viewing fee is calculated using the IC card ID and program information (service ID, event ID, broadcast date and time, and sales price) for each subscriber stored in the customer information database 6b. Note that these pieces of program information are sent in advance from the copyright management apparatus 104 in the distribution apparatus 1.

  The customer management computer 6a of the customer management center 6 sends the sales amount data having the same amount as the viewing fee charged to the subscriber to the copyright management device 104 of the distribution apparatus 1, and the purchase record (service ID and event ID). And customer information is transmitted to the copyright management apparatus 104 (step S118). This customer information includes a customer ID, an IC card ID, an address, a telephone, and the like. This customer information transmission may be omitted for privacy protection.

  The copyright management apparatus 104 aggregates the data sent from the customer management center 6, and determines to which author the copyright fee should be paid based on the aggregation result (step S119). Specifically, the CPU 1043 (FIG. 2) of the copyright management apparatus 104 searches the program identification information database 1041 (FIG. 2) based on the service ID and event ID sent from the customer management center 6. The corresponding content ID is acquired. Next, the CPU 1043 searches the master database 1042a of the copyright information database 1042 based on the acquired content ID, and acquires the copyright holder and the copyright fee rate. Then, the CPU 1043 calculates a copyright fee from the copyright fee rate, and accumulates this as a copyright fee payment amount for the corresponding content ID in the sales history database 1042b of the copyright information database 1042. The CPU 1043 also records the customer information received from the customer management center 6 as a sales record for the corresponding content ID in the sales history database 1042b of the copyright information database 1042, and the sales amount data received from the customer management center 6 Accumulate the accumulated sales amount. The sales record is recorded as, for example, the sales frequency for each age group and sex of the subscriber.

  The distribution company that operates the distribution apparatus 1 pays the copyright holder a copyright fee that is calculated by the copyright management apparatus 104 and corresponds to the payment amount of the copyright fee stored in the sales history database 1042b (step S120). The distribution company can also conduct a market research on the viewer base etc. based on the sales records obtained by collecting the customer information acquired from the customer management center 6.

  Next, with reference to FIG. 13, the flow of processing related to encryption and decryption of distribution information in the music distribution receiving system will be described. FIG. 13 shows only the main part related to encryption and decryption processing of music, individual information and program identification information in the distribution information in the music distribution receiving system shown in FIG. Elements that are not directly related to the decoding process are not shown.

  The customer management computer 6a of the customer management center 6 supplies the individual information stored in the customer information database 6b to the encryption device 105 of the distribution device 1. The individual information input to the encryption device 105 is input to the encryptor 105b together with the work key Kw extracted from the encryption key database 105a. The encryptor 105b encrypts the individual information and the work key Kw using the individual key Km extracted from the encryption key database 105a. Then, the encryptor 105b supplies the encrypted individual information and the work key Kw to the multiplexing unit (MUX) 44 of the ground station 2. At this time, the work key Kw extracted from the encryption key database 105a is not encrypted, but is directly encrypted with the encrypted individual information and the work key Kw separately from the above flow. Sent to.

  The individual information processing unit 44a in the multiplexing unit 44 of the ground station 2 can repeatedly transmit the encrypted individual information and the work key Kw supplied from the encryption device 105 of the distribution device 1. Is processed and input to the multiplexer 44f. The individual information processing unit 44a also extracts the work key Kw sent from the encryption device 105 without being encrypted, and supplies the work key Kw to the later-described encryptor 44d.

  Compressed MPEG audio data and ATRAC audio data are input to the multiplexing unit 44 of the ground station 2 from the MPEG audio transmission unit 43A and the ATRAC audio transmission unit 43B in the same ground station 2 shown in FIG. The The multiplexing unit 44 is also supplied with program identification information from the program identification information database 1041 in the copyright management apparatus 104 of the distribution apparatus 1. The multiplexing unit 44 also receives MPEG video data and MPEG audio data from the TV program transmission unit 39 shown in FIG. 3, audio additional information from the audio additional information transmission unit 41, and GUI data from the authoring unit 42. Although it is input, it is not shown in FIG.

  The program identification information processing unit 44c in the multiplexing unit 44 includes the program identification information sent from the program identification information database 1041 in the copyright management apparatus 104 of the distribution apparatus 1 and the scramble key Ks generated by the scramble key generator 42b. In response to this, processing is performed so that these data can be repeatedly transmitted, and the data is supplied to the encryptor 44d. The encryptor 44d performs encryption processing on the program identification information and the scramble key Ks output from the program identification information processing unit 44c using the work key Kw supplied from the individual information processing unit 44a, respectively. Input to the multiplexer 44f.

  On the other hand, the encryptor 44e performs scramble processing on the compressed MPEG audio data and ATRAC audio data using the scramble key Ks supplied from the scramble key generator 44b, and the multiplexer 44f. To enter.

  The multiplexer 44f includes the encrypted individual information and work key Kw from the individual information processing unit 44a, the encrypted program identification information and scramble key Ks from the encryptor 44d, and the encryptor 44e. Encrypted MPEG audio data and ATRAC audio data, and a TV program MPEG video / audio data (not shown), audio additional information, and GUI data are time-division multiplexed to form one data stream, which is transmitted from the radio wave transmission unit 45. To do.

  The data stream transmitted from the radio wave transmission unit 45 of the ground station 2 via the satellite 3 is received by the reception facility 4 at the subscriber's house, and via a tuner 51 of the receiving device 4b, a separator (demultiplexer) 52a. Are separated into data and supplied to each unit by the control CPU 58.

  Specifically, among the separated data, the encrypted individual information and the work key Kw are input to the decryptor 65a in the IC card 65, where the individual key extracted from the non-volatile memory 65c. The work key Kw is extracted by decrypting using Km.

  Of the separated data, the encrypted program identification information and the scramble key Ks are input to the decryptor 65b in the IC card 65, where the work key Kw output from the decryptor 65a is used. The scramble key Ks is extracted after decryption.

  Of the separated data, the encrypted MPEG audio data and ATRAC audio data are input to the decoder 52b, where they are decrypted using the scramble key Ks output from the decoder 65b. Thus, the data is output to the transport unit 53 also illustrated in FIG. Since the subsequent processing is as described above, the description thereof is omitted.

  Of the data received by the receiving device 4b, the encrypted individual information is decrypted by the decryptor 65a, and the encrypted program identification information is decrypted by the decryptor 65b. The decoded individual information and program identification information are stored in a predetermined storage area of the nonvolatile memory 65c. Of the program identification information recorded in the nonvolatile memory 65c of the IC card 65, the service ID and the event ID are periodically sent to the customer management computer 6a of the customer management center 6 as purchase records.

  As described above, in the music distribution receiving system according to the present embodiment, a music broadcast program is distributed and audio data of the music is distributed using a plurality of audio channels. Then, the subscriber can search for a desired music piece using a list of delivered music pieces, and can easily store the audio data in the storage device 4c.

  In the music distribution / reception system of the present embodiment, the pay-per-view method in which purchases are made in units of music is charged, and purchase records are stored in the IC card when the music is purchased. Since the purchased purchase record is sent to the customer management center 6, the distribution company can accurately grasp who purchased which song and can perform accurate billing.

  Furthermore, in the music distribution receiving system according to the present embodiment, the copyright management apparatus 104 is arranged in the distribution apparatus 1, and the copyright management apparatus 104 acquires a purchase record of the music from the customer management center 6, Since the royalty fee is calculated, the copyright fee can be properly paid to the copyright holder. In addition, since the customer management center 6 also sends the customer information of the user who purchased the music to the copyright management device 104, for example, it is possible to grasp the ranking for each artist or each music for each customer segment. It is also possible to research market trends in real time.

  Furthermore, in the music distribution receiving system according to the present embodiment, the distribution music is encrypted with a plurality of encryption keys, so that unauthorized viewing can be eliminated and the reliability of the system can be improved. Can be secured.

  Furthermore, in the music distribution receiving system according to the present embodiment, the receiving device 4b of the receiving facility 4 arranged at the subscriber's house only needs to transmit the purchase record data in the IC card to the customer management center 6; There is no need to send it to the 1 side. Therefore, for example, when adding the copyright management function of the present invention to an existing music distribution receiving system, the subscriber does not need to make any modifications to his / her existing receiving equipment 4, and the distribution provider side Therefore, it is only necessary to make a change that a copyright management device is newly provided in the distribution device 1. That is, even when such a system change is performed, no new burden is generated on the subscriber.

  While the present invention has been described with reference to the embodiment, the present invention is not limited to this embodiment, and various modifications can be made. For example, in the above-described embodiment, the customer management center 6 that performs customer management is arranged separately from the distribution device 1, but the distribution device 1 may have the function of the customer management center 6. Good.

  In the above embodiment, the receiver 4b at the subscriber's home and the customer management center 6 are connected by the telephone line 5. However, other lines, for example, lines such as the Internet and ISDN are used. May be.

  In the above embodiment, the case where the present invention is applied to a digital satellite broadcasting system has been described. However, the present invention downloads music distributed by terrestrial broadcasting, and music distributed by cable broadcasting. The present invention can also be applied to a system or a system for downloading music via the Internet. Furthermore, the present invention is not limited to the case where the distribution target is music material, but other types of works as long as the content of the copyrighted work can be distributed as data, such as video materials such as movies. It is also applicable to a system that distributes things. For example, the present invention can also be applied to an electronic distribution system, an electronic magazine reading system, an electronic newspaper reading system, and the like that distribute type information and still images of books, magazines, and newspapers.

It is a block diagram which shows the whole structure of the music distribution receiving system as a literary work distribution receiving system which concerns on one embodiment of this invention. It is a block diagram showing the structure of the copyright management apparatus in the delivery apparatus shown in FIG. It is a block diagram which shows an example of a structure of the ground station shown in FIG. It is a figure which shows the structure of an example of the data delivered in the music delivery receiving system shown in FIG. It is a figure which shows a mode that the data distributed in the music distribution receiving system shown in FIG. 1 are multiplexed and reconstructed. FIG. 2 is a block diagram illustrating an example of a configuration of a receiving device illustrated in FIG. 1. It is a figure for demonstrating the aspect of a connection of the receiver shown in FIG. 1, and a storage device. FIG. 2 is a block diagram illustrating an example of a configuration of a storage device illustrated in FIG. 1. It is a figure which shows an example of the recording format to the storage device shown in FIG. It is a figure which shows an example of the screen displayed on the television receiver in the system shown in FIG. It is a flowchart showing the flow of the outline process centering on copyright management about the music delivered in the music delivery receiving system shown in FIG. It is a flowchart following FIG. FIG. 3 is a block diagram illustrating only main parts related to encryption and decryption processing of music, individual information, and program identification information in distribution information in the music distribution receiving system shown in FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Distribution apparatus, 2 ... Ground station, 3 ... Satellite, 4 ... Reception equipment, 4b ... Reception apparatus, 4c ... Storage device, 4d ... Television receiver, 6 ... Customer management center, 6a ... Customer management computer, 6b ... Customer information database 58 ... Control CPU 65 ... IC card 101 ... Program organization input terminal 102 ... Music input terminal 103 ... Copyright information input terminal 104 ... Copyright management device 105 ... Encryption device 105a ... Encryption key database, 106 ... TV program material server, 107 ... Music material server, 108 ... Audio additional information server, 109 ... GUI data server, 111 ... Program organization server, 1041 ... Program identification information database, 1042 ... Copyright information database 1042a ... Master database, 1042b ... Sales history database, 1043 ... C U.

Claims (6)

Is encrypted with the delivery device, a receiving device for receiving the transmitted the content,
Content decrypting means for decrypting the encrypted content;
Storage means for holding the content viewing limit;
A selection means for selecting purchase content;
Acquisition means for acquiring the selected content by digital broadcasting;
Determining means for determining which of the viewing total amount of the acquired content and the viewing limit amount is greater;
History holding means for holding content purchase history and
History transmission means for transmitting the content purchase history to a device for counting the amount of the copyright fee to the author of the content ;
When the selection means selects the content purchased, the determining means, when the viewing total amount is determined to fall below the viewing restriction amount, the content decryption unit rows decoding processing Utotomoni, said history holding Means records in the content purchase history,
The history transmission means, when the free space in the storage area of the history holding means is less than a predetermined value, when the specified date and time is set in advance, the total amount of viewing exceeds the preset specified amount When the content purchase history is satisfied, the content purchase history is transmitted.
RECEIVER. The storage means stores a first decryption key;
The obtaining means receives the second decryption key and the third decryption key encrypted together with the encrypted content;
The decryption means decrypts the second decryption key using the first decryption key held in the storage means, and uses the decrypted second decryption key to decrypt the encrypted third It decrypts the decryption key
The receiving apparatus according to 請 Motomeko 1. When the selection means selects the purchase content, if the total viewing amount exceeds the viewing limit amount, the content decryption unit does not perform decryption processing.
The receiving apparatus according to 請 Motomeko 1. It further comprises display means for displaying content information,
The display means, based on the content purchase history, that displays the information of the acquired content in the past
The receiving device according to claim 1 .   The display means displays not only the content information but also a program related to the content.
The receiving device according to claim 4. Is encrypted with the distribution device, a method of receiving transmitted the content,
Holding a content viewing limit;
Selecting purchase content;
Acquiring the selected content by digital broadcasting;
Determining which of the total viewing amount of the acquired content and the viewing limit amount is greater;
Decrypting the acquired encrypted content and recording it in the content purchase history when the total viewing amount is below the viewing limit amount ; and
When the free space of the storage area for recording the content purchase history falls below a predetermined value, when the designated date and time set in advance is reached, or when the total amount of viewing exceeds the preset designated amount or when satisfying one of the steps and the including receiving method for transmitting the content purchase history to a device for counting the amount of the copyright fee to the copyright holder of the content.

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