WO2004036914A1 - メディアデータ再生装置、メディアデータ配信装置、メディアデータ再生方法、メディアデータ再生プログラム、メディアデータ配信プログラム、コンピュータ読み取り可能な記録媒体 - Google Patents
メディアデータ再生装置、メディアデータ配信装置、メディアデータ再生方法、メディアデータ再生プログラム、メディアデータ配信プログラム、コンピュータ読み取り可能な記録媒体 Download PDFInfo
- Publication number
- WO2004036914A1 WO2004036914A1 PCT/JP2003/013368 JP0313368W WO2004036914A1 WO 2004036914 A1 WO2004036914 A1 WO 2004036914A1 JP 0313368 W JP0313368 W JP 0313368W WO 2004036914 A1 WO2004036914 A1 WO 2004036914A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- data
- media data
- media
- complemented
- music
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/16—Analogue secrecy systems; Analogue subscription systems
- H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
- H04N7/17309—Transmission or handling of upstream communications
- H04N7/17318—Direct or substantially direct transmission and handling of requests
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/631—Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/81—Monomedia components thereof
- H04N21/8106—Monomedia components thereof involving special audio data, e.g. different tracks for different languages
- H04N21/8113—Monomedia components thereof involving special audio data, e.g. different tracks for different languages comprising music, e.g. song in MP3 format
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
Definitions
- the present invention relates to a media data reproducing device for distributing and reproducing media data such as music data via a network, a media data distribution device, a media data reproducing method, a media data reproducing program, a media data distribution program ', and a computer. It relates to a readable recording medium. Background art.
- media data that includes music, movies, television programs, computer programs, etc. as content information is prohibited from being viewed or copied without permission of the right holder from the viewpoint of copyright.
- media data includes image data (still image data and moving image data), audio data, music data, computer programs and related data, and includes various types of playback including computers. In a device, it means all data including content information to be played back.
- the problem is how to avoid the plagiarism and duplication of the Service-to-Self who has no right.
- a recording medium such as a CD or a hard disk
- Measures against such duplication include recording media data in an encrypted state, such as DVD players and discs, so that illegal data cannot be read, and illegal data duplication.
- There is a method of performing duplication prohibition (protection) processing so that copying is not possible.
- the media data to be distributed may be subjected to software-like encryption processing, etc., to prohibit illegal reading, or to perform copy prohibition (protection) processing.
- a memory card having a copyright protection function that performs media data protection processing by associating hard-air information unique to the memory card, instead of merely performing soft-to-air processing.
- a memory card having a copyright protection function holds, for example, ID information and media data unique to each memory card.
- FIG. 5 is a schematic diagram for explaining a problem in the distribution of media data via a conventional network.
- the distribution information DB database
- the transmitted and received media are transmitted.
- Data can be monitored by a Service-to-Self during the network and leaked.
- the Internet is used as a network, there is a high possibility that the contents of communication data are leaked due to various bucket monitoring.
- the data stealer knows the details of the encryption process (encryption method and encryption key), the leaked media data will not Being misused.
- the downloaded media data was recorded as shown in Fig. 5.
- a recording medium for example, a hard disk or a memory card
- the media data is stolen or copied.
- the data distributor prohibits the storage of media data after distribution in the receiving terminal, the user must download the media data via the network each time it is used (played). This causes the following problems.
- the communication speed of the network is insufficient compared to the data size of the media data, the waiting time for using the media data becomes long. For example, if the usage waiting time (reception time) for playing music data (media data) equivalent to one hour is 10 hours, it exceeds the general permissible limit of the user.
- Japanese Patent Application Laid-Open Publication No. 2000-9-1924 discloses that when downloading media data via a network, A technique for downloading the media data except for sample data for trial listening is disclosed. According to this technology, Duplicate download of the pull data part can be avoided. Therefore, useless communication time due to duplicate download of the sample data portion can be reduced. However, even in the above-described conventional technology, the entire media data is ultimately downloaded via the network. Therefore, if the amount of media data becomes large, the communication time required for downloading becomes long. Will be.
- Japanese Patent Application Laid-Open Publication No. 2000-2004-28 discloses that digital content (media data) is divided into two or more parts. A technique for encrypting each part is disclosed. This technology increases the security level. However, even in the above-mentioned conventional technology, the amount of data to be communicated does not decrease, so that the communication time required for downloading cannot be almost reduced.
- the media data when storing media data after distribution in the receiving terminal is prohibited, the media data is transmitted each time it is used (reproduced). Therefore, the traffic load on the network increases, and if a fee is charged based on usage of the network, the communication cost of the media data becomes large.
- Japanese Patent Application Laid-Open Publication No. 2000-2797859 discloses that after decomposing or dividing content into missing content and differential content, Based on this, a technology for reproducing content has been disclosed.
- the content Since there is a possibility that the content can be reproduced, there is a problem in terms of security and the business feasibility of the distribution service. For example, a user may play back at least part of an image or sound based on only the missing content, or play it in an incomplete state such as an intermittent state. In such a case, the data distributor cannot perform appropriate billing and distribution data management.
- the present invention has been made in view of such a problem, and its purpose is to secure high security that protects media data from theft, duplication, and the like by a simple configuration, and to ensure user convenience. It is an object of the present invention to provide a media data reproducing device, a media data distribution device, a media data reproducing method, a media data reproducing program, a media data distribution program, and a computer-readable recording medium. Disclosure of the invention
- the media data reproducing device of the present invention includes a recording unit that records a part of the media data as complemented data, an instruction input receiving unit that receives a user's instruction input, and the media data that the instruction input receiving unit receives.
- a receiving unit for receiving, from the external device via the network, complementing data to be complemented with the complemented data in response to the playback instruction of the supplementary data, and supplementing data recorded in the recording unit.
- the compressed media data is synthesized based on the complementary data received by the receiving unit, and the compressed media data is decompressed by a reverse procedure of compression to be reproducible media data and then reproduced.
- a control unit that performs the control.
- the media data reproducing method further comprises a recording step of recording a part of the media data as complemented data, and receiving a user's instruction input.
- the compressed media data is synthesized based on the complemented data recorded in the recording step and the complemented data received in the receiving step, and the compressed media data is decompressed and reproduced by a reverse procedure of compression.
- the present invention is characterized in that it comprises a composite reproduction step of reproducing as possible media data (in the present invention, the complemented data and the complementary data
- the form is not particularly limited as long as the entire data is reproduced, for example, a specific position in the entire media data.
- the bit information and the supplementary data from the whole the media data.
- the bit information (supplementary data) excluding the part can be the complementary data.
- the media data composed of music data, audio data, moving image data, still image data, computer programs and their related data is used as supplementary data, Prior to the re-instruction, the record has been lost.
- the supplementary data that complements the above-mentioned complemented data is received via the network and combined with the previously recorded complemented data.
- Media data in a compressed state is obtained. Although this compressed media data cannot be played back as it is, it is decompressed and played back by the reverse procedure of compression. Based on the reproducible media data obtained in this way, the content information of the media data is reproduced.
- the complemented data and the supplementary data are not the media data itself, but are partial data of the compressed media data that cannot be reproduced as it is. It cannot be played. That is, according to the present invention, it is guaranteed that the complemented data cannot be reproduced without the presence of the supplementary data, so that illegal reproduction of the data can be effectively prevented.
- FIG. 1 (a) is a flowchart showing a procedure for receiving the complemented data in the music reproducing terminal.
- FIG. 1 (b) is a flowchart showing a procedure for receiving complementary data in the music reproduction terminal.
- FIG. 2 is a block diagram showing a schematic configuration of a music distribution system according to one embodiment of the present invention.
- FIG. 3 is a block diagram showing a schematic configuration of a music reproduction terminal that constitutes the music distribution system.
- FIG. 4 (a) is a flowchart showing a procedure when the supplemented data distribution server separates certain music data into supplementary data and supplementary data.
- FIG. 4 (b) is a flowchart showing the procedure when the supplementary data distribution server separates certain music data into complemented data and supplementary data:
- Fig. 5 shows the conventional network distribution.
- FIG. 4 is a schematic diagram for explaining a problem. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 2 is a block diagram illustrating a schematic configuration of the music distribution system according to the present embodiment.
- the music distribution system includes a supplemented data distribution server 1 and a supplemented data DB 2, a supplementary data distribution server 3 (media data distribution device), and a supplementary data DB 4 ( Media data delivery device) and a music playback terminal 5 (media data playback device, hereinafter also simply referred to as “terminal”) on the user side are connected via a network k and a network B, respectively. is there.
- the supplemented data distribution server 1 sends the supplemented data to the music reproduction terminal 5 via the network A.
- the complementary data distribution server 3 provides the music reproduction terminal 5 with the complementary data via the network B.
- the data to be supplemented and the complemented data are in a relationship in which the entire music data (media data) in a compressed state is reproduced by synthesizing the both. I do.
- the supplemented data distribution server 1 and the supplementary data distribution server 3 are known network servers.
- the data to be complemented DB2 is constituted by a large-capacity hard disk, various types of magneto-optical disks, and the like, and a large number of data to be complemented are stored in the data to be complemented DB2.
- the supplementary data DB 4 is composed of a large-capacity hard disk and various types of magneto-optical discs, and the supplementary data DB 4 stores a large number of supplementary data that complement the data to be supplemented. ing.
- Network A and Network B include well-known communication networks such as the Internet and LAN (Local Area Network), and known communication networks such as public communication lines, leased lines, and ISDN (Integrated Services Digital Network). You can use the line.
- the network A is a wireless LAN network that realizes data communication at a speed of about 11 Mbps to 54 Mbps
- the network B is 144 kbps to 2 kbps.
- a third-generation mobile phone network that realizes data communication at a speed of about 4 Mbps will be adopted.
- the network A and the network B have different configurations, but a common network configuration may be adopted. However, it is better to separate the network A and the network B from each other and separate the transmission path of the above-mentioned complemented data from the transmission path of the above-mentioned complemented data. Data theft reduces the risk of unauthorized acquisition of all song data. Further, the data distribution server 1 and the supplementary data distribution server 3, the captured data DB 2 and the supplemental data DB 4 may have a common configuration.
- FIG. 3 is a block diagram showing a schematic configuration of the music reproduction terminal 5.
- the music playback terminal 5 is, for example, a terminal device installed in a vehicle, and as shown in the figure, a CPU 20 (control unit), an operation input unit 21 (instruction input reception unit), a display unit 2 2, audio interface 23, audio analog circuit 24, speaker 25, storage unit interface 26, storage unit 27 (recording unit, recording medium), communication interface 28, communication unit 29 (receiving unit ), And is composed of a transmitting and receiving antenna 30.
- a transmitting and receiving antenna 30 is composed of a transmitting and receiving antenna 30.
- Each of the above components is connected to each other via an input / output path 31.
- the CPU 20 is configured by, for example, a microcomputer, and controls the operation of each unit of the music reproduction terminal 5 by its arithmetic and control functions.
- the operation input section 21 is composed of buttons and switches including a numeric keypad, a pointing device, etc., and transmits a signal corresponding to an operation of a user of the music reproduction terminal 5 via the input / output path 31. Supply to CPU 20. The user is instructed to play / stop the music by operating the operation input unit 21. If a voice recognition means is adopted as the operation input unit 21, a voice instruction by a user's utterance can be accepted.
- the display unit 22 is composed of display elements such as an LCD and an LED, and various messages such as operation contents by the operation input unit 21 and music information. Is displayed.
- the audio interface 23 includes a digital signal processor that performs various digital signal processing, and a DAC that generates an analog audio signal based on the processed digital audio signal. This is an interface circuit for outputting a sound signal.
- the audio analog circuit 24 includes various amplifier circuits and modulation circuits, and amplifies and modulates the analog audio signal output from the audio interface 23.
- An analog audio signal (including reproduction of music data described later) output from the audio analog circuit 24 is output as a sound through the speaker 25.
- a headphone connection terminal may be provided and a headphone may be connected to the outside.
- the storage unit 27 is composed of, for example, a random access memory (RAM), a read only memory (ROM), a node disk, a nonvolatile semiconductor memory, and the like.
- RAM random access memory
- ROM read only memory
- the storage unit interface 26 and the input / output path 31 are connected to each other.
- Various programs and data to be read by the CPU 20 via the CPU 20 are stored.
- the storage unit 27 of the music playback device 5 stores a music data playback program described later and a database including a large number of complemented data.
- the communication unit 29 is a communication circuit that performs data communication via each of a wireless LAN network (network A) and a third-generation mobile phone network (network B).
- the communication unit 29 receives a communication instruction from the CPU 20 via a communication interface 28 for controlling a communication synchronization signal and various communication protocols, and outputs a radio signal from the transmission / reception antenna 30. It communicates with external devices by providing data and provides a data communication function by wireless bucket communication.
- the operation of the supplementary data distribution server 3 and the operation of the music reproduction terminal 5 are performed by causing a computer (CPU) to execute a music data distribution program and a music data reproduction program, respectively.
- the above-mentioned music data distribution program and the above-mentioned music data reproduction program are respectively provided on a computer-readable recording medium (music reproduction) provided in the complementary data distribution server 3 and the music reproduction terminal 5. (Including the storage unit 27 of the raw device 5).
- FIG. 4 (a) is a flowchart showing the procedure when the supplemented data distribution server 1 separates certain music data into supplemented data and supplemented data.
- the supplemented data distribution server 1 receives an input of new music data (new data) (step 40, hereinafter referred to as “S 40”).
- new data new music data
- step 40 hereinafter referred to as “S 40”.
- the state is maintained until the music data is supplied (S41).
- the supplemented data distribution server 1 compresses the inputted new music data (S42). This can reduce the amount of data transmitted later and make it difficult for a suspicious person to restore and restore music data by stealing and copying the supplemented data and the supplementary data.
- the compression method is MP3 Any compression method such as the Ogg V orvis method, ATRAC 3 method, WMA method, Twin VQ method, AAC method can be adopted.
- the lossless compression method if you want to completely restore the original music data, and if some amount of information may be lost from the original music data (the sound quality may be degraded).
- Use a lossy compression method In this step, if not only the music data is subjected to the compression processing but also the encryption processing, the music data can be more reliably protected.
- the supplemented data distribution server 1 separates the music data compressed in S42 into supplemented data and supplemented data (S43).
- the form of the data to be supplemented and the data to be complemented are not particularly limited as long as the entire music data can be reproduced by synthesizing both. Various methods can be considered. It is also preferable to separate at least one of the data to be supplemented and the complemented data so that the data is composed of a plurality of partial data. According to this configuration, unless all of the partial data is obtained, the reproduction of the media data becomes impossible, so that illegal reproduction can be effectively prevented.
- the music playback terminal 5 can acquire individual partial data in a plurality of stages according to the user's time and communication cost.
- the total data size of the complemented data is preferably larger than the total data size of the complementary data.
- the data size of the supplementary data to be transmitted and received later can be made relatively small, so that the waiting time and communication cost of network communication can be further reduced. Will be possible.
- the bit information at a specific position is set as supplementary data, and the portion of the entire media data excluding the bit information (complementary data) is referred to as complemented data.
- complemented data For example, the music data compressed in S42 is converted into an 8-bit byte sequence, a specific bit of each piece of bit information is extracted as supplementary data, and the remaining portion is used as complemented data.
- the supplementary data has a data size of 1/8 of the media data
- the supplemented data has a data size of 7/8 of the media data.
- the amount of data extracted as supplementary data is not limited to one bit, but may be two or more bits.
- Method B Of the bit information that composes the music data in the compressed state, the music data is converted by using a separation table in which information on which part is assigned to the complementary data and the data to be complemented is set in advance. , Can be separated into supplementary data and complemented data.
- the separation table is set in advance which bit information is used as complementary data in each data unit. That is, in the above separation table, for each data unit having an information amount of 8 bits, “from the L-th bit to the bit number from the bit information to the complement data” is used. Bit information for M pieces of data from the port information. " In this case, for example, in all data units, the value of L may be randomly selected from the range of 1 to 8, and the value of M may be fixed to 1. Alternatively, the value of L may be fixed to 1 and the value of M may be randomly selected from the range of 1 to 8. Further, in all data units, the value of L may be fixed to 1 and the value of M may be randomly selected from the range of 1-3. Further, in each data unit, both the value of L and the value of M may be randomly selected from the range of 1 to 8.
- the music data in the compressed state has a data structure with 8 bits as one unit, and if the value of L + M_1 exceeds 8, be sure to reduce the value of 8 by subtracting 8, etc.
- Information data is specified.
- Such a separation table has a predetermined number of items, and is preferably applied repeatedly from the beginning of the music data. For example, after applying the separation table having the number of items of 256 to the 1st to 256th data units of the music data, the separation table is sequentially applied to the separation data of the 25th to 5th data units of the music data. By repeatedly applying the data to the 1st, 5th, 13th to 768th data units, one piece of music data can be separated into complementary data and complemented data.
- Such a separation table must be provided in common for the data separation side and the synthesis side.However, if the contents of the separation table are changed at regular intervals and irregularly, unauthorized acquisition of music data by a third party will be more likely. It can be difficult.
- a part of the temporal data array of the music data in the compressed state can be used as supplementary data, while the remaining part can be used as complemented data. That is, by extracting and separating captured data from the compressed music data at predetermined time intervals, complementary data and complemented data can be generated. For example, every 10 seconds from the beginning of the compressed music data While data for one second is extracted and used as supplementary data, data obtained by removing supplementary data from music data can be used as supplementary data. Although it is a relatively simple separation method, an unauthorized acquirer of the complemented data cannot obtain music data in a correct compression state because data is lost for one second every 10 seconds. Therefore, it is extremely difficult to reproduce the complemented data alone, so that illegal reproduction of music data can be effectively prevented.
- the effect of shortening the time required for the combined reproduction process by obtaining a relatively simple combined reproduction process at the terminal can be obtained.
- a separation table in which information on which part of the music data is to be assigned to the complementary data and the complemented data is set in advance.
- Such a separation table must be provided in common for both the data separation side and the composition side, but if the contents of the above separation table are changed regularly and irregularly, unauthorized acquisition of music data by third parties can be prevented. It can be more difficult.
- the music reproducing terminal 5 (terminal) will know the reverse procedure (including the expansion method which is the reverse procedure of the compression method). However, it is necessary to be able to synthesize and play back music data based on this reverse procedure.
- the supplemented data delivery server 1 provides the supplementary data separated in S43 to the supplementary data delivery server 3 (S44).
- the supplemented data distribution server 1 may provide the supplementary data to the supplementary data distribution server 3 by a direct communication means, or the administrator of the supplemented data distribution server 1 may use various external recording media. Indirectly distributes the above supplementary data using It may be provided to the communication server 3.
- the supplemented data distribution server 1 transmits the supplemented data separated in S43 to the music reproduction terminal 5 (terminal) via the wireless LAN network (network A, see Fig. 2). Yes (S45).
- the data size is smaller than the complemented data.
- Large complemented data can be efficiently provided to the music reproduction terminal 5.
- wireless LAN networks called Hotspots (trademarks) are rapidly spreading in restaurants, shopping centers, gasoline stands, public institutions, parking lots, and intersections. However, if such a hot spot is used, the music reproduction terminal 5 can efficiently acquire captured data even when the music reproduction terminal 5 moves with the installed vehicle.
- the user of the music reproducing terminal 5 designate a desired complemented data name (music data name) in advance. This makes it easy for the music reproduction terminal 5 to acquire in advance the complemented data corresponding to the music data that is likely to be instructed to be reproduced by the user, thereby greatly improving the user's convenience. Can be done.
- provision of the complemented data from the captured data distribution server 1 to the music reproduction terminal 5 may be performed indirectly using various recording media.
- the non-complementary data is distributed and sold in the state of being recorded on the magneto-optical disk, and the user of the music reproducing terminal 5 uses the magneto-optical disk to generate the complemented data.
- the data to be supplemented may be stored in the storage unit 27 (see FIG. 3) of the music reproduction terminal 5 before the music reproduction terminal 5 (terminal) is shipped from the factory.
- the data to be supplemented has a relatively large data size, the music data cannot be reproduced by itself and can be kept in a safe state, so that the distribution form can be made relatively flexible.
- distribution form using a magneto-optical disk, distribution of several gigabytes of non-complementary data can be realized easily and at low cost.
- FIG. 1A is a flowchart showing a procedure for receiving the complemented data in the music reproduction terminal 5.
- the music playback terminal 5 waits for reception (distribution) of supplementary data from the supplementary data distribution server 1 before the user instructs playback of the music data (S 10), the state is maintained until the supplemented data is distributed from the supplemented data distribution server 1 (S11).
- the music reproduction terminal 5 receives the supplemented data and stores it in the storage unit 27 (see FIG. 3) (S12, record Stage).
- FIG. 4B is a flowchart showing a procedure when the supplementary data distribution server 3 separates certain music data into supplementary data and supplementary data.
- the supplementary data distribution server 3 waits for a supplemental data transmission request from the music playback terminal 5 (terminal) (S50), and The state is maintained until transmission of the captured data from the music reproduction terminal 5 is requested (S51).
- the supplementary data distribution server 3 requests the user of the music reproduction terminal 5 (terminal) to input and transmit identification information and a password (or information unique to the music reproduction terminal 5).
- the user is authenticated (S52). With this authentication, the supplementary data is provided only to the authorized user, and other persons cannot synthesize and reproduce the music data using the music reproduction terminal 5, and the music data is illegally reproduced. Strong protection against plagiarism and duplication.
- the supplementary data distribution server 3 may store the fact internally or notify the administrator. preferable.
- the music playback terminal 5 When the user authentication of the music playback terminal 5 fails in S52, the music playback terminal 5 returns to the standby state (S50) for a request for transmission of the supplementary data.
- the requested complementary data is extracted from the complementary data DB 4 (S53), and the third-generation mobile phone network (network) B, see Fig. 2) to the music reproduction terminal 5 (terminal) (S54).
- FIG. 1 (b) is a flowchart showing a procedure for receiving the complementary data in the music reproduction terminal 5.
- the music reproduction terminal 5 first waits for a use request (reproduction instruction) from the user (S20, instruction input reception stage). The music playback terminal 5 waits in that state until it receives a use request (playback instruction) from the user (S21). If a use request (playback instruction) is received from the user, the process proceeds to the next step, and the complemented data of the requested music (if the complemented data is composed of a plurality of partial data, all the partial data Check whether is stored in the storage unit 27 (see Fig. 3).
- the music reproducing terminal 5 requests the complementary data distribution server 3 to transmit the complementary data corresponding to the requested music (data to be complemented), and after receiving appropriate user authentication, the complementary data.
- the supplementary data transmitted from the distribution server 3 is received (S23, reception stage). If the supplementary data consists of multiple partial data, acquire the data so that all the partial data are aligned.
- the music playback terminal 5 combines the media data compressed based on the complemented data recorded in the storage unit 27 and the complement data received in S23, and converts the compressed media data. Then, it is decompressed by the reverse procedure of compression to make it reproducible media data and played back (S24, synthesis playback stage).
- S24 synthesis playback stage
- the reverse procedure of the procedure for separating the music data into the complemented data and the supplementary data see [Method A] to [Method C]
- the decompression method corresponding to the compression method are executed. As a result, all of the music data can be synthesized and expanded and reproduced.
- the music reproduction terminal 5 discards the compressed media data and the media data in the reproducible state, and the supplementary data received in S23 (S2 Five ) .
- the reproduced music data and the complementary data necessary for the reproduction can be prevented from being stolen or copied, so that the protection of the music data is more complete. can do.
- the discarding of the music data in S25 be performed sequentially on the already reproduced portion in parallel with the synthesis reproduction of the music data, rather than after the synthesis reproduction of the entire music data is completed.
- the synthesized music data existing in the storage unit 27 (see FIG. 3) in the music playback terminal 5 can be minimized, so that an in-circuit emulator or the like can be used.
- Collective duplication and analysis of the storage contents of the storage unit 27 can reduce the risk of music data being stolen and duplicated.
- the music playback terminal 5 is described as being installed in a vehicle, for example, but the installation location and physical form are not particularly limited.For example, a configuration including an easily removable external hard disk As a result, The hard disk may be movable from the vehicle to each home. In this case, it is preferable that the supply of the supplemented data to the music reproduction terminal 5 is also realized by connecting the external hard disk to a broadband network installed in the home. Further, the music playback terminal 5 preferably includes an abnormality detection unit that detects abnormality information, and preferably stops the operation of the communication unit 29 or / and the CPU 20 based on the abnormality information detected by the abnormality detection unit. .
- the abnormality detecting means for detecting the abnormality information includes a case where the housing of the music reproducing terminal 5 is suddenly opened, an unexpected electrical connection to the built-in debugging terminal ⁇ the memory, and a case where the music reproducing terminal 5 Means that detects information related to unauthorized theft or duplication of music data, such as programs that run in a suspicious manner.
- abnormality information and abnormality detection means include the following.
- the communication unit 29 receives the complementary data. Since the operation of synthesizing or synthesizing music data by Z and CPU 20 is stopped, the music data can be strongly protected from unauthorized plagiarism and duplication.
- the embodiment of the present invention has been described by taking the distribution and reproduction of music data in the music distribution system as an example.
- the media data to be distributed and reproduced is other audio data, moving image data, and still image data.
- the present invention can be similarly applied to media data including image data, computer programs, and composite data of these.
- the supplemented data is supplied to the recording unit from the outside via a recording medium.
- the complemented data recorded in the recording step is supplied from outside through a recording medium.
- the complemented data having a relatively large data size can be easily obtained by reading not the network but the recording medium on which the complemented data is recorded. This makes it possible to significantly reduce the communication load and the associated waiting time and communication costs, as compared with the case where supplementary data is acquired via a network.
- the media data reproducing apparatus it is preferable that at least one of the complemented data and the complemented data includes a plurality of partial data. According to this configuration, the media data cannot be reproduced unless all the partial data is obtained, so that illegal reproduction can be effectively prevented. Wear.
- the media data reproducing apparatus can acquire individual partial data in a plurality of stages according to the user's time and communication cost.
- control unit may discard the compressed media data, the media data in a reproducible state, and the complementary data received by the receiving unit after the reproduction. It is good.
- the reproduced media data and the complementary data necessary for the reproduction can be prevented from being stolen or duplicated, so that the protection of the media data is more completely protected. can do.
- a total data size of the data to be complemented is larger than a total data size of the data to be complemented.
- the data size of the supplementary data received from the network can be made relatively small in accordance with the user's reproduction instruction, so that the waiting time and the communication cost for the transmission and reception of the supplementary data can be further suppressed. And become possible.
- the receiving unit receives the supplementary data in an encrypted state.
- the media data reproducing device includes abnormality detection means for detecting abnormality information, and based on the abnormality information detected by the abnormality detection means, may stop the operation of the receiving unit or Z and the control unit. preferable.
- the abnormality detecting means for detecting the abnormality information includes suddenly opening the housing of the media data reproducing apparatus, making an unexpected electrical connection to the built-in debugging terminal and the memory, and performing the media reproducing apparatus.
- the receiving unit receives the supplementary data or / and the control unit sends the media data.
- Data synthesis Since playback operation is stopped, media data can be strongly protected from unauthorized theft and duplication.
- the media data is constituted by bit information, and the supplementary data is data at a specific position in the bit information, while the complemented data is data of the media.
- the data is preferably data obtained by removing the above-mentioned complementary data from the key data.
- the media data has a temporal data array
- the complementary data is data extracted at predetermined time intervals from the temporal data array, while the complemented data is It is preferable that the data is data obtained by removing the complementary data from the media data.
- control unit may allocate the supplementary data and the complemented data in the media data. It is preferable that the complementary data and the complementary data are combined and reproduced based on a data table in which the information is stored.
- the media data can be appropriately reproduced based on the captured data and the complemented data generated from arbitrary media data. Further, by changing the contents of the data table regularly / irregularly, it is possible to make it more difficult for a third party to illegally acquire the music data.
- the media data distribution device of the present invention is characterized by transmitting the complementary data to the receiving unit in response to a request from the media data reproducing device.
- the media data distribution device transmits the supplementary data to the receiving unit in response to a request from the media data reproduction device only when the user of the media data reproduction device is authenticated.
- the supplementary data is provided only to authorized users, and other persons cannot realize the combined reproduction of the media data using the media data reproducing apparatus, and the media data is illegally reproduced. Strong protection against plagiarism and duplication.
- any one of the media data reproducing apparatus, the media data reproducing method, and the function of the media data distribution apparatus are realized by executing a media data reproduction program or a media data distribution program on a computer. be able to. Furthermore, the above-mentioned media data reproducing program or the above-mentioned media data distribution program can be read from a computer-readable recording medium on which they are recorded, and can be executed by a computer.
- the media data retransmission device and the distribution device of the present invention can safely and easily distribute and reproduce media data by transmitting and receiving complementary data via a network.
- it is suitable for distribution and playback of media data such as music, movies, television programs, and computer programs that require copyright protection over a network.
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Reverberation, Karaoke And Other Acoustics (AREA)
- Storage Device Security (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/532,003 US20060053495A1 (en) | 2002-10-21 | 2003-10-20 | Medium data reproduction device, medium data distribution device, medium data reproduction method, medium data reproduction program, medium data distrubution program, and computer-readable recording |
JP2004544990A JPWO2004036914A1 (ja) | 2002-10-21 | 2003-10-20 | メディアデータ再生装置、メディアデータ配信装置、メディアデータ再生方法、メディアデータ再生プログラム、メディアデータ配信プログラム、コンピュータ読み取り可能な記録媒体 |
EP03754190A EP1555824A1 (en) | 2002-10-21 | 2003-10-20 | Medium data reproduction device, medium data distribution device, medium data reproduction method, medium data reproduction program, medium data distribution program, and computer-readable recording medium |
AU2003273052A AU2003273052A1 (en) | 2002-10-21 | 2003-10-20 | Medium data reproduction device, medium data distribution device, medium data reproduction method, medium data reproduction program, medium data distribution program, and computer-readable recording medium |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-306327 | 2002-10-21 | ||
JP2002306327 | 2002-10-21 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004036914A1 true WO2004036914A1 (ja) | 2004-04-29 |
Family
ID=32105206
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/013368 WO2004036914A1 (ja) | 2002-10-21 | 2003-10-20 | メディアデータ再生装置、メディアデータ配信装置、メディアデータ再生方法、メディアデータ再生プログラム、メディアデータ配信プログラム、コンピュータ読み取り可能な記録媒体 |
Country Status (6)
Country | Link |
---|---|
US (1) | US20060053495A1 (ja) |
EP (1) | EP1555824A1 (ja) |
JP (1) | JPWO2004036914A1 (ja) |
CN (1) | CN1706194A (ja) |
AU (1) | AU2003273052A1 (ja) |
WO (1) | WO2004036914A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006060325A (ja) * | 2004-08-17 | 2006-03-02 | Ntt Docomo Inc | コンテンツ配信システム及びコンテンツ配信方法 |
JP2007094524A (ja) * | 2005-09-27 | 2007-04-12 | Canon Inc | データ処理方法、データ処理装置およびプログラム |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101042910A (zh) * | 2006-03-21 | 2007-09-26 | 皇家飞利浦电子股份有限公司 | 一种用于播放内容的方法和装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1087291A1 (en) * | 1999-03-30 | 2001-03-28 | Sony Corporation | Information processing system |
US20020066025A1 (en) * | 2000-09-12 | 2002-05-30 | Tatsuro Sato | Music distribution method |
JP2002204228A (ja) * | 2000-12-28 | 2002-07-19 | Toshinori Hayashi | コンテンツ配信装置、コンテンツ配信方法、コンテンツダウンロードプログラム、コンテンツダウンロード装置 |
EP1248433A2 (en) * | 2001-03-16 | 2002-10-09 | Nec Corporation | Content delivery system, content delivery method, and content reproducing device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5999622A (en) * | 1995-11-22 | 1999-12-07 | Microsoft Corporation | Method and apparatus for protecting widely distributed digital information |
US7143445B1 (en) * | 1999-05-31 | 2006-11-28 | Sony Corporation | Information processing apparatus, information processing method, and program storage medium |
US6976166B2 (en) * | 2001-02-06 | 2005-12-13 | Hewlett-Packard Development Company, L.P. | Method and apparatus for partial encryption of content |
US7159120B2 (en) * | 2001-11-19 | 2007-01-02 | Good Technology, Inc. | Method and system for protecting data within portable electronic devices |
JP4150886B2 (ja) * | 2002-04-19 | 2008-09-17 | ソニー株式会社 | 暗号化復号化演算装置およびデータ受信装置 |
-
2003
- 2003-10-20 AU AU2003273052A patent/AU2003273052A1/en not_active Abandoned
- 2003-10-20 US US10/532,003 patent/US20060053495A1/en not_active Abandoned
- 2003-10-20 CN CN200380101834.1A patent/CN1706194A/zh active Pending
- 2003-10-20 WO PCT/JP2003/013368 patent/WO2004036914A1/ja active Application Filing
- 2003-10-20 JP JP2004544990A patent/JPWO2004036914A1/ja active Pending
- 2003-10-20 EP EP03754190A patent/EP1555824A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1087291A1 (en) * | 1999-03-30 | 2001-03-28 | Sony Corporation | Information processing system |
US20020066025A1 (en) * | 2000-09-12 | 2002-05-30 | Tatsuro Sato | Music distribution method |
JP2002204228A (ja) * | 2000-12-28 | 2002-07-19 | Toshinori Hayashi | コンテンツ配信装置、コンテンツ配信方法、コンテンツダウンロードプログラム、コンテンツダウンロード装置 |
EP1248433A2 (en) * | 2001-03-16 | 2002-10-09 | Nec Corporation | Content delivery system, content delivery method, and content reproducing device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006060325A (ja) * | 2004-08-17 | 2006-03-02 | Ntt Docomo Inc | コンテンツ配信システム及びコンテンツ配信方法 |
JP4509691B2 (ja) * | 2004-08-17 | 2010-07-21 | 株式会社エヌ・ティ・ティ・ドコモ | コンテンツ配信システム及びコンテンツ配信方法 |
JP2007094524A (ja) * | 2005-09-27 | 2007-04-12 | Canon Inc | データ処理方法、データ処理装置およびプログラム |
JP4590333B2 (ja) * | 2005-09-27 | 2010-12-01 | キヤノン株式会社 | データ処理方法、データ処理装置およびプログラム |
Also Published As
Publication number | Publication date |
---|---|
AU2003273052A1 (en) | 2004-05-04 |
US20060053495A1 (en) | 2006-03-09 |
CN1706194A (zh) | 2005-12-07 |
JPWO2004036914A1 (ja) | 2006-02-16 |
EP1555824A1 (en) | 2005-07-20 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN100414865C (zh) | 发送内容数据的方法和装置,及记录和/或还原装置 | |
JP4740157B2 (ja) | デジタルデータコンテンツの保護 | |
US7747538B2 (en) | Memory card | |
US9009497B1 (en) | Secure methods for generating content and operating a drive based on identification of a system on chip | |
JP4986327B2 (ja) | ポータブル音楽プレーヤ用のコピー・セキュリティ | |
KR100434634B1 (ko) | 디지털 저작물인 콘텐트를 처리하는 저작물 보호시스템 | |
US7328458B2 (en) | Authoring system, authoring key generator, authoring device, authoring method, and data supply device, information terminal and information distribution method | |
US8301569B2 (en) | Content information providing system, content information providing server, content reproduction apparatus, content information providing method, content reproduction method and computer program | |
US7324974B1 (en) | Digital data file encryption apparatus and method | |
US8544108B2 (en) | Copyright protection storage medium, information recording apparatus and information recording method, and information playback apparatus and information playback method | |
US20060235956A1 (en) | Information process distribution system, information processing apparatus and information process distribution method | |
US20030061519A1 (en) | Authentication communication apparatus and authentication communication system | |
JPH09115241A (ja) | データ記録装置及び方法、データ再生装置及び方法、並びに記録媒体 | |
WO2002075550A1 (fr) | Enregistreur de donnees restituant des donnees originales autorisees a n'exister qu'en un seul exemplaire | |
CN1783102A (zh) | 用于拷贝保护的方法和系统 | |
WO2004064063A1 (ja) | コンテンツ配布システム、コンテンツ記録装置及び記録方法、コンテンツ再生装置及び再生方法、並びにコンピュータプログラム | |
JPH10133955A (ja) | 可搬型メディア駆動装置とその方法、及び可搬型メディアとネットワークの連携装置とその方法 | |
JP2004193843A (ja) | コンテンツ配信装置、コンテンツ配信方法、コンテンツ配信プログラムおよびコンテンツ再生装置、コンテンツ再生方法、コンテンツ再生プログラム | |
JP3925496B2 (ja) | データ記録装置及び記録方法 | |
JP2000348003A (ja) | ディジタル著作物であるコンテンツを扱う著作物保護システム | |
EP1051011B1 (en) | System for preventing an illegal copy of digital contents | |
JP2003195758A (ja) | データ処理装置、インタフェースボードおよびデータ秘匿方法 | |
WO2004036914A1 (ja) | メディアデータ再生装置、メディアデータ配信装置、メディアデータ再生方法、メディアデータ再生プログラム、メディアデータ配信プログラム、コンピュータ読み取り可能な記録媒体 | |
JP2004140757A (ja) | コンテンツの暗号化方法及び暗号化されたデータを復号化する復号化方法並びにその装置 | |
JP2001274784A (ja) | コンテンツ情報伝送方法、コンテンツ情報記録方法、コンテンツ情報伝送装置、コンテンツ情報記録装置、伝送媒体、及び記録媒体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 2004544990 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 20038A18341 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2003754190 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2006053495 Country of ref document: US Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10532003 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2003754190 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 10532003 Country of ref document: US |