JP2001251598A - Video supply-reproduction method, video supplying device, video reproducing device and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To safely supply and reproduce the images such as movies via a digital media. SOLUTION: A computer system 22 of a movie supplier 12 converts the video signals according to a master film 14 into serial video data 41 based on a DVD-Video standard. Then the system 22 changes the order of scene data 42-1, 42-2, and so on which configure the data 41, enciphers these scene data to generate the enciphered non-serial video data 45 and then divides the data 45 to the supply DVD-ROMs 15-1, 15-2 and so on and supplies them. At a movie theater 13, a serializing device 51 reads the data 45 out of the DVD- ROMs 15-1, 15-2, and so on and rearranges the scene data in the correct order to generate the enciphered serial video data 80. A movie projector 52 cancels encipherment of the data 80 to generate the data 41 and then puts them on the screen by reproducing the data 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video distribution / reproduction method in which a video such as a movie is duplicated on a distribution side and distributed to a reproduction side, and the distributed video is reproduced on the reproduction side. The present invention relates to a video distribution side device, a video reproduction side device, and a recording medium.

[0002]

2. Description of the Related Art FIG. 19 shows an overall configuration of a conventional movie distribution and screening system. As shown in this figure, at the movie distributor, the movie distributor receives the master film of the movie produced by the movie producer and reprints it according to the number of theaters (more precisely, the number of screens) of the business partner. To make distribution films and distribute them to each theater. Also, the theater on the side of playing the film plays the distributed film by playing it with a device such as a projector. Here, the film means a 35 mm optical film (hereinafter, 35 mm film).

[0003]

The cost of producing a distribution film in the above-mentioned conventional system is about 220,000 yen / book. For example, the cost of distributing one movie for 500 screens is 110 million. It was about 10 million yen. Further, for example, if a theater with a capacity of 100 seats is operated based on the above-mentioned conventional system, it costs about 11 million yen. That is, in the conventional system, the burden on the movie distributor and the theater was extremely large. These problems have led to 35
This is an unavoidable problem as long as the mm film is used.

By the way, in recent years, 35 mm
There has been proposed a movie distribution and screening system that eliminates film and substitutes digital media. This type of system
It has been proposed for the purpose of completely substituting 35 mm film with digital media, and it is possible to achieve a screening quality exceeding that of the conventional system. However, since dedicated equipment is required to ensure high screening quality, it is impossible to significantly reduce movie distribution costs and theater equipment costs in any system. Therefore, this type of system has hardly spread.

[0005] Of course, if general-purpose equipment is used in a movie distribution and screening system using digital media, the above cost can be greatly reduced. However, since the general-purpose equipment is used, unauthorized copying and unauthorized viewing by a third party occur. The likelihood increases. Avoiding such abuse is an essential requirement for the distribution and screening of movies that are produced at a large investment cost, especially for the distribution and screening of movies as digital data that can be physically copied without deterioration. If so, a mechanism that can reliably avoid unauthorized use is required.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and provides a video distribution and reproduction method capable of safely distributing and reproducing video such as a movie to be protected from unauthorized use using digital media. It is an object of the present invention to provide a video distribution side device, a video reproduction side device, and a recording medium for realizing this method.

[0007]

According to a first aspect of the present invention, there is provided a video distribution / reproduction method for reproducing, from a distribution side, video data in which a plurality of unit video data are arranged in chronological order. A video distribution / reproduction method for distributing video data distributed from the distribution side to the reproduction side, and changing the order of a plurality of unit video data constituting the video data on the distribution side; and A distribution step of distributing the video data in which the order of the plurality of unit video data is changed from the distribution side to the reproduction side in the step, and a plurality of unit video data constituting the video data distributed in the distribution step on the reproduction side And a reproducing step of rearranging the plurality of unit video data in the reproducing step on the reproducing side. It is characterized by having a regeneration step for. Also, a video distribution device for realizing the above method is provided with a changing means for changing an order of a plurality of unit video data constituting video data (claim 5), and realizes the above method. The video reproducing apparatus for the rearrangement means for rearranging a plurality of unit video data constituting video data distributed from the distribution side so as to follow a time series, the plurality of unit video data is rearranged by the recovery means And reproducing means for reproducing the video data. The recording medium used to implement the method records video data in which the order of a plurality of unit video data is changed. (Chart 12). According to the method, the apparatus, and the recording medium, video data in which the order of a plurality of unit video data is not in chronological order is distributed.

According to a second aspect of the present invention, in the video distribution and reproduction method of the first aspect, in the distribution step, the order of the plurality of unit video data is changed in the changing step. The video data is distributed and stored in a plurality of recording media, and the plurality of storage media are distributed from a distribution side to a reproduction side. In the restoration step, the plurality of storage media are stored in the plurality of recording media distributed in the distribution step. The video data is generated by combining the generated data, and a plurality of unit video data constituting the video data are rearranged in time series. Claim 6
The video distribution device according to claim 5, wherein the video data in which the order of the plurality of unit video data is changed by the changing unit is recorded in a plurality of recording media in the video distribution device according to claim 5. It is characterized by comprising means. According to these methods and apparatuses, video data is distributed and distributed to a plurality of recording media.

Further, in the video distribution / reproduction method according to the third aspect, in the video distribution / reproduction method according to the first aspect, an encryption step of encrypting video data to be distributed on the distribution side; And a decryption step of decrypting the video data distributed in the distribution step. According to a seventh aspect of the present invention, there is provided a video distribution device according to the fifth aspect, further comprising an encryption unit for encrypting video data to be distributed. According to a tenth aspect of the present invention, in the video reproduction side device according to the ninth aspect, the video reproduction side device is provided with decryption means for decrypting video data distributed from the distribution side. According to these methods and devices,
The encrypted video data is distributed.

According to a fourth aspect of the present invention, in the video distribution / playback method of the third aspect, the encrypting step includes performing encryption using an encryption method corresponding to a playback side in the encrypting step. In the decryption step, decryption is performed using an encryption method corresponding to the reproducing side. An image distribution device according to an eighth aspect is characterized in that, in the image distribution device according to the seventh aspect, the encrypting means performs encryption using an encryption method corresponding to a reproduction side. . According to these methods and apparatuses, video data distributed to each playback side is encrypted by an encryption method corresponding to the playback side.

According to another aspect of the present invention, there is provided a video reproducing apparatus for distributing encrypted video data from a distribution side to a reproduction side, wherein the video data is distributed from the distribution side. A video playback apparatus provided on the playback side to realize a video distribution playback method for playing back video on the playback side, comprising: decryption means for decrypting video data distributed from the distribution side; A reproduction means for reproducing the video data decrypted by the decryption means, and a protection means for prohibiting the output of the video data decrypted by the decryption means to the outside. I have. According to this device, the decrypted video data is not output to the outside.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. Note that the movie distribution and screening system according to each embodiment uses the video distribution and playback method according to the present invention in a small theater (mini theater) having about 20 to 100 seats.
It was obtained by applying to the distribution and screening of a movie assuming the screening in.

A: First Embodiment A movie distribution and screening system according to a first embodiment of the present invention will be described with reference to FIGS.

A-1: Overall Configuration FIG. 1 is a conceptual diagram showing the overall configuration of a movie distribution and screening system according to a first embodiment of the present invention. As shown in the figure, the movie distributor 11 and the movie distributor 1 are on the movie distributor side.
2. A plurality of theaters 13-1,
13-2,... The movie maker 11 produces the movie and passes the master film 14 of the produced movie to the movie distributor 12. Movie distributor 12 is master film 1
4 to one set of distribution DVD-ROM (Digi
tal Versatile Disc-Read Only Memory) 15-1,
15-2,... And deliver these sets to the theaters 13-1, 13-2,.
Each of the theaters 13-1, 13-2,... Uses the distributed DVD-ROMs 15-1, 15-2,.

In the following description, the theater 13-
If any one of 1, 13-2,... Is not specified, the theater is described. This rule is similarly applied to other codes. In the present embodiment, the distribution D
In many cases, the number of VD-ROMs 15 is three, but the number of distribution DVD-ROMs 15 may be different for each movie and is not limited to this.

A-2: Configuration of Distribution Side Device Next, the distribution side device 2 of the movie distributor 12 on the distribution side.
0 will be described with reference to FIGS. FIG. 2 is a block diagram showing the configuration of the distribution-side device 20. As shown in FIG. 2, the distribution-side device 20 reads the master film 14 for each scene (unit video), and Reading device 21 for outputting a video signal (24 frames / second) for each scene, and using the video signal output from the film reading device 21 for distribution DVD-ROMs 15-1 and 15-
, And a computer system 22 that creates

FIG. 3 is a block diagram showing the configuration of the computer system 22. As shown in FIG. 3, the computer system 22 performs various arithmetic processes and controls each unit. RAM (Random Access) used as work memory
Memory 31, a ROM 32 storing a group of programs read and executed by the CPU 30, a hard disk 33 storing a group of programs such as an operating system and application programs read and executed by the CPU 30, and displaying images to the user. CRT to display
(Cathode Ray Tube) or other display 34, CPU3
The image corresponding to the data supplied from 0 is displayed on the display 3.
4, an operation unit 36 such as a keyboard or a mouse for the user to input an instruction, and an operation unit interface for supplying data representing the instruction input through the operation unit 36 to the CPU 30. 3
7. A video signal input interface 38 for digitizing a video signal output from the film reading device 21 and supplying it to the CPU 30, and a DVD which is controlled by the CPU 30 and writes data into a DVD-ROM inserted therein.
-It has a ROM writer 39. The hard disk 3
Reference numeral 3 is read and written by the CPU 30, and is also used for storing various video data.

The computer system 22 is operated by the CPU 30 based on a power-on (not shown) or a user's instruction input through the operation unit 36.
3 are executed to execute processing for creating the distribution DVD-ROMs 15-1, 15-2,... Hereinafter, the function of the computer system 22 will be described focusing on this processing.

FIG. 4 is a conceptual diagram showing a process of creating distribution DVD-ROMs 15-1, 15-2,... In the computer system 22, and as shown in FIG. The interface 38 digitizes the analog video signal output from the film reading device 21 to generate serial video data 41 and supplies the serial video data 41 to the CPU 30. The serial video data 41 is data in which scene data 42-1, 42-2,..., Which are video data for each scene in a movie, are arranged in the order in which the movie is played back, and are data (60 frames / frame) compliant with the DVD-Video standard. Seconds).

The CPU 30 stores the serial video data 41 supplied from the video signal input interface 38 in the hard disk 33, and further stores each scene data 42-
., 42-2,...
, 43-2,... Are generated at random. At this time, the CPU 30
Is a consecutive number of each unit 43 (for example, unit 4
3-1 to 43-2,... Further, the CPU 30 subjects the non-serial video data 44 to encryption for each scene data 42 based on the CSS (content scramble system) specified by the DVD-Video standard, and obtains the encrypted scene data 4.
.., 46-2,... Are generated.

Further, the CPU 30 controls the first DVD-
An image prompting insertion of the ROM into the DVD-ROM writer 39 is displayed on the display 3 via the display interface 35.
4 and an appropriate DV is displayed on the DVD-ROM writer 39.
When the D-ROM is inserted, all units 43-1, 43
Write a plurality (for example, two) of units randomly extracted from −2,... To the DVD-ROM. Furthermore, CP
U30 performs the same process as the first DVD-ROM for the second, third,... DVD-ROMs.
5-1, 15-2,... However, the CPU 30
Performs writing to the DVD-ROM only once for each unit 43. That is, all units 43-1,
43-2, ... are the distribution DVD-ROMs 15-1, 15-
2, and are recorded without duplication. In addition, CPU
Reference numeral 30 denotes a distribution DV of a set number set by the user.
Has a function of repeatedly creating the D-ROMs 15-1, 15-2,...

A-3: Configuration of Reproducing Device Next, the configuration of the reproducing device 50 included in the theater 13 on the reproducing side will be described with reference to FIGS. FIG. 5 is a block diagram showing the configuration of the reproducing apparatus 50. As shown in FIG. 5, the reproducing apparatus 50 has a serializer 51 and a projector 52, and is configured by connecting both. .

FIG. 6 is a block diagram showing the configuration of the serialization device 51. As shown in FIG. 6, the serialization device 51 performs various arithmetic processing and controls the CPs.
U60, R used as a work memory of the CPU 60
AM 61, ROM 62 storing a program read and executed by CPU 60, hard disk 63 read and written by CPU 60, display 64 such as a liquid crystal display for displaying an image to a user, and displaying an image corresponding to data from CPU 60. A display interface 65 to be displayed on the display 64; an operation unit 66 such as an operation button for a user to input an instruction; and an operation unit interface 67 for supplying data representing the instruction input via the operation unit 66 to the CPU 60. , A DVD-ROM drive 68 controlled by the CPU 60 to read data from a DVD-ROM inserted therein, and a projector interface 69 for outputting data (digital video data and instructions) from the CPU 60 to the projector 52. .

FIG. 7 is a block diagram showing the structure of the projector 52. As shown in FIG. 7, the projector 52 performs various arithmetic processing and controls various parts.
RAM 71 and CPU used as work memory of CPU 0
70 storing a program to be read and executed
The OM 72, the hard disk 73 read / written by the CPU 70, the projection unit 75 for projecting the image, the image according to the image data (60 frames / second) from the CPU 70 are optimized (converted to 24 frames / second), and the projection unit 75 It has a projection interface 76 for projecting, and an input interface 74 for inputting data output from the serialization device 51.

The serialization device 51 executes the program stored in the ROM 62 by the CPU 60 based on a power-on (not shown) or a user's instruction input from the operation unit 36, thereby providing the distribution DVD-ROM 15-1. , 1
The processing for creating video data that can be projected by the projector 52 from 5-2,... Is performed. In addition, the projector 52 has a CPU 70 which stores a ROM 72 based on a power-on (not shown) or an instruction from the serializer 51.
Is executed to execute a process for projecting an image according to the input image data by executing a program stored in the image data. Hereinafter, the functions of the serializer 51 and the projector 52 will be described focusing on these processes.

FIG. 8 shows a DVD-RO for distribution on the reproduction side.
Are conceptual diagrams showing a process of reproducing data stored in M15-1, 15-2,..., As shown in FIG.
An image prompting insertion of the OM 15-1 into the DVD-ROM drive 68 is displayed on the display 64 via the display interface 65. When the DVD-ROM 15-1 is inserted into the DVD-ROM drive 68,
The unit 43 (for example, the units 43-1 and 43-2) stored in the ROM 15-1 is read and stored in the hard disk 63. In addition, the CPU 60 executes the second
The same process as that for the first DVD-ROM 15 is performed on the DVD-ROM 15, and all units 43-
, 43-2, ... are stored.

Further, the CPU 60 includes a hard disk 63
With respect to the encrypted non-serial video data 45 composed of the scene data 46-1, 46-2,... In all the units 43-1, 43-2,.
The encryption based on the SS is decrypted, and the non-serial video data 44 is generated. Further, the CPU 60 controls the scene data 42-1 and 42- in the non-serial video data 44.
The serial video data 41 is generated by rearranging 2,... In the correct reproduction order in accordance with a preset procedure.
The encrypted serial video data 80 is generated by performing encryption based on S, and is output to the projector 52 via the projector interface 69. The encrypted serial video data 80 is data in which the scene data 46-1, 46-2,... Are arranged in the correct reproduction order.

On the other hand, when the encrypted serial video data 80 is input via the input interface 74, the CPU 70 of the projector 52 stores it on the hard disk 73. Further, the CPU 70 decrypts the scene data 46-1, 46-2,... Constituting the encrypted serial video data 80 stored on the hard disk 73 based on CSS, and outputs the serial video data. 41
Create The projector 52 is configured not to allow the output of the video data, and is configured so that the data on the hard disk 73 is deleted at the time of disassembly.

The CPU 60 of the serializer 51
Outputs a projection start instruction to the projector 52 through the projector interface 69 when a predetermined instruction is input from the operation unit 66. When a projection start instruction is input via the input interface 74, the CPU 70 of the projector 52 activates the projection unit 75 and the projection interface 76, and supplies the serial video data 41 to the projection interface 76. That is, the projector 52 starts reproduction (ie, projection) of the serial video data 41 in the hard disk 73 in response to a projection start instruction from the serialization device 51.

A-4: Flow of Movie Distribution and Screening Next, the flow of movie distribution and screening in the movie distribution and screening system configured as described above will be described mainly with reference to FIGS.
0 will be described. However, in the following description, it is assumed that the power of each device 21, 22, 51, 52 has already been turned on. It is also assumed that the sequence for rearranging the scene data 46-1, 46-2,... Has already been set in the serializer 51.

FIG. 9 is a flow chart showing the flow of the distribution process on the distribution side. As shown in FIG. 9, when the master film 14 is received from the movie maker 11, the user receives the master film 14 at the movie distributor 12. Is read by the film reading device 21. Thus, as shown in FIG. 4, an analog video signal corresponding to the master film 14 is transmitted to the computer system 2.
2 and converted into a digital signal (step S
A1). The reading of the master film 14 is performed sequentially for each scene.
2 are stored in the hard disk 33 as scene data 42-1, 42-2,...
Are serially stored.

In the computer system 22, non-serial video data 44 composed of units 43-1, 43-2,... In which all scene data 42-1, 42-2,. (Step SA
2). Further, in the computer system 22, each of the scene data 42-1 and 42 in the non-serial video data 44
Are encrypted based on CSS to generate encrypted non-serial video data 45 (step SA3).

The encrypted non-serial video data 45 thus created is stored in a DVD in a random order for each unit 43.
-Written in ROM and distributed DVD-ROM15-
, 15-2,... Are created only in one set (step SA4). The process of step SA4 is repeated by the number of theaters 13 scheduled to show a movie (step SA4).
5). Then, when a set of the number of theaters 13 scheduled to show a movie is completed, the user delivers each set to the theater 13 (step SA6).

FIG. 10 is a flowchart showing the flow of the reproducing process on the reproducing side. As shown in FIG.
When the VD-ROMs 15-1, 15-2, ... are received (step SB1), the serializing device 51 is operated to read the distribution DVD-ROMs 15-1, 15-2, ... (step SB2). Thereby, the serialization device 51
The hard disk 63 stores encrypted non-serial video data 45.

Next, in the serializing device 51, all the scene data 46-1, 46-2,... Constituting the encrypted non-serial video data 45 in the hard disk 63 are decrypted and the non-serial video data 44 Is generated,
Further, all the scene data 42-1, 42-2,... Constituting the non-serial video data 44 are rearranged in accordance with a preset procedure to generate serial video data 41. Are encrypted for each of the data 42-1, 42-2,... To generate encrypted serial video data 80 (step SB3).
The encrypted serial video data 80 is supplied to the projector 52.

In the projector 52, all scene data 46-1, 46-2,
Are decrypted to create the serial video data 41 (step SB4). Then, when the user inputs a projection start instruction via the serialization device 51, the serial video data 41 is reproduced in the projector 52 (step B5). As a result, an image according to the serial image data 41 is projected from the projection unit 75 of the projector 52, and a movie is screened.

A-5: Supplement As described above, according to the present embodiment, the DVD-ROM 15-delivered from the movie distributor 12 to the theater 13-
The video data stored in 1, 15-2,... Are randomly rearranged for each scene, and are data encrypted for each scene.
Some or all of the OMs 15-1, 15-2,.
Even if it reaches the hands of a third party, it is impossible for a third party who does not have a valid reproduction-side device 50 to reproduce this correctly. That is, unauthorized viewing of a movie can be prevented.

Further, according to the present embodiment, since the decrypted video data is not output from the serializer 51, the third party has the legitimate reproduction side device 50. However, the serial video data 41 cannot be duplicated. That is, unauthorized copying can be prevented. In this embodiment, the serializer 51 and the projector 52 are provided separately, but may be integrated as shown in FIG. FIG. 11 is a block diagram showing a configuration of a reproducing apparatus 110 in which the serializing device 51 and the projector 52 are integrated, and the same reference numerals are given to parts common to FIGS. 6 and 7. In this figure, the only newly-installed ROM 111 stores the program stored in the ROM 62 and the program stored in the ROM 72.
Functions as a serializer 51 and a projector 52.
It is to be noted that the configuration is such that the output of video data to the outside is not permitted. If the serialization device 51 and the projector 52 are integrated as described above, illegal copying can be more reliably prevented.

Further, according to the present embodiment, one sheet is used for a plurality of sheets.
Since the set distribution DVD-ROM 15 is distributed, even if a part of the set reaches the hands of a third party during the distribution process, the third party cannot watch the movie.
That is, unauthorized viewing of a movie can be more reliably prevented. In addition, each DVD-RO for distribution which comprises a set
If M15 is sent separately, unauthorized appreciation can be prevented more reliably. Further, in the above-described embodiment, an example in which the master film 14 is transferred from the movie maker 11 to the movie distributor 12 has been described.
It is needless to say that the serial video data 41 may be passed to 2.

In the above-described embodiment, each theater 13
DVD-ROMs 15-1, 15-2 for distribution to
, The same encryption based on CSS is applied, so that the theater 13 can apply a general decryption method. Therefore, the manufacturing cost of the serializer 51 and the projector 52 can be reduced. Conversely, the distribution DVD-ROMs 15-1, 15-2,
.. May be different for each theater 13. For example, in this mode, the encryption key used in the CSS is different for each theater 13, and the encryption using the unique encryption key is performed in the theater 13. In this aspect,
A third party obtains the encryption key of the theater 13-1, and
DVD-ROMs 15-1 and 15 distributed to the PC-2
−2,..., And even if the scenes could be correctly rearranged by chance, since the encryption key of the theater 13-2 is different from the encryption key of the theater 13-1, the distribution DV
.. Cannot be decrypted for the D-ROMs 15-1, 15-2,. In other words, as a whole, unauthorized appreciation and unauthorized copying can be prevented more reliably. Further, as is apparent from this, according to the aspect in which the encryption key is made different for each movie distributor 12, the unauthorized appreciation and unauthorized copying can be more reliably prevented as a whole.

In the above-described embodiment, an example is shown in which the serializing device 51 sets the sorting procedure in advance.
3 may be notified. For example, the movie distributor 12 notifies the theater 13 of the information indicating the rearrangement procedure by using a communication means such as a facsimile, and the user in the theater 13 operates the serializer 51 by using this information to perform appropriate rearrangement. The reordering procedure may be set, or the algorithm for randomizing in the computer system 22 and the algorithm for determining the reordering procedure in the serializer 51 are used as the key to the screening start date and an algorithm having a correlation with each other, The serialization device 51 may be configured to obtain an appropriate sorting procedure only on the screening start date. In addition, the encryption key is
In the case of making a difference for each, the algorithm of randomization in the computer system 22 and the serializer 51
May be an algorithm that uses the encryption key as a key and has a correlation with each other.

The length of the scene corresponding to the scene data 42 in FIG. 4 may be set. For example, when priority is given to the data compression rate, the time length of each scene may be set to a certain length to improve the compression rate. Further, in the above-described embodiment, an example has been described in which the serial video data 41 is deserialized and then encrypted in the distribution device 20.
At 0, the serial video data 41 may be encrypted and then deserialized, and the reproducing device 50 may serialize and then decrypt the data. in this case,
De-encryption and re-encryption in the serialization device 51 become unnecessary. Further, in the reproducing apparatus 50, a video buffer may be provided, and the video data may be read out from the plurality of distribution DVD-ROMs in a correct order (serial) and decrypted to obtain the serial video data 41. .

B: Second Embodiment A movie distribution and screening system according to a second embodiment of the present invention will be described with reference to FIGS. However, in each figure, FIGS.
The same reference numerals are given to the same parts as those described above, and the description thereof will be omitted.

B-1: Overall Configuration FIG. 12 is a conceptual diagram showing the overall configuration of a movie distribution and screening system according to a second embodiment of the present invention. The movie distribution and screening system shown in FIG. 12 differs from the system shown in FIG. The difference is
Master film 14 of a movie produced by the movie maker 11
Is output from the movie distributor 120 to the non-serial video data 45, and the encrypted non-serial video data 45 is output to the data distributor 12 having a satellite distribution facility.
, And the theaters 122-1, 122-2,... Which are planning to show the movie, receive the distributed encrypted non-serial video data 45, and use this data. This is the point where the movie is shown. In the present embodiment, the data distributor 121 is classified as a distributor.

B-2: Configuration of Distribution Side Device Next, the configuration of the distribution side device 130 of the distribution side movie distributor 120 and the data distributor 121 will be described with reference to FIG.
3 and FIG. FIG. 13 is a block diagram showing the configuration of the distribution device 130. As shown in FIG.
And a computer system 131 for generating and transmitting the encrypted non-serial video data 45 using the video signal output from the film reading device 21, and further encrypting the encrypted non-serial video data 45 transmitted from the computer system 131. And theaters 122-1 and 122-2,
Have satellite distribution facilities 132 for distribution to.

FIG. 14 is a block diagram showing the configuration of the computer system 131. The configuration shown in FIG. 14 differs from the configuration shown in FIG. 3 in that a DVD-ROM writer 39, a ROM 32, and a hard disk 33 are used instead. Satellite distribution equipment 1 for encrypted non-serial video data 45
A communication unit 140 for transmitting to the ROM 32 and the ROM 32 and the hard disk 33 are connected to the DVD-ROM writer 3.
9 is deleted, and the communication unit 140 is deleted.
In that a ROM 141 and a hard disk 142 to which a program for controlling the program is added are provided.

The distribution-side device 130 is configured such that the CPU 30 operates the ROM 141 and the hard disk 142 based on a user's instruction input at the time of turning on a power source (not shown) or the operation unit 36.
Is executed by executing a group of programs stored in the non-serial video data 45 on the DVD-ROM. Is transmitted to the satellite distribution facility 132 via the communication unit 140 without performing the communication. That is, in the present embodiment, the final form in FIG. 4 is the distribution DVD-ROMs 15-1 and 15-.
Instead of 2,..., The encrypted non-serial video data 45 is obtained.

B-3: Configuration of Reproducing Device Next, the configuration of the reproducing device 150 of the theater 122 on the reproducing side will be described with reference to FIGS.
FIG. 15 is a block diagram showing a configuration of the reproducing apparatus 150. As shown in FIG. 15, the reproducing apparatus 150 receives a data distributed from the satellite distribution facility 132 and outputs the data. Serialization device 1 that receives data output from reception device 151, generates encrypted serial video data 80 based on the data, and outputs the encrypted serial video data 80.
52, and a projector 52 for reproducing the encrypted serial video data 80.

FIG. 16 is a block diagram showing the structure of the serializer 152. The difference between the structure shown in FIG. 16 and the structure shown in FIG. 6 is that the DVD-ROM drive 68 and the RO
In place of M62, an encrypted non-serial video data input unit 160 for inputting data output from the satellite receiver 151 and a program for controlling the DVD-ROM drive 68 for the ROM 62 are deleted, R to which a program for controlling the satellite receiver 151 has been added
OM 161 is provided.

The serializer 152 receives a CP when a power supply (not shown) is turned on, a user's instruction input from the operation unit 66, data input from the satellite receiver 151, and the like.
The U60 executes various programs by executing a program stored in the ROM 161. The processing content is different from the processing content of the serializer 51 in that the encrypted non-serial video data 45 is stored in a DVD-ROM.
The point is that the input is performed via the encrypted non-serial video data input unit 160 without performing the process of reading from the. That is, in the present embodiment, among the processing shown in FIG. 8, the processing after the encrypted non-serial video data 45 is performed.

B-4: Flow of Movie Distribution and Screening Next, the flow of movie distribution and screening in the movie distribution and screening system configured as described above will be described mainly with reference to FIGS. 17 and 18. However, in the following description, it is assumed that the power of each of the devices 21, 131, 132, 51, 151, and 152 has already been turned on. In the serializer 152, the scene data 46-1, 46-2,
It is assumed that the rearrangement procedure of ... has already been set. Further, the satellite receiver 15 of the theater 122 where the movie is to be shown
In 1, it is assumed that the preparation by the satellite distribution facility 132 for decryption has been completed.

FIG. 17 is a flowchart showing the flow of the distribution process on the distribution side. The flow of the distribution process in this embodiment is the same as that of the movie distribution and screening system in the first embodiment from step SA1 to SA3. The encrypted non-serial video data 45 created in the computer system 131 up to step SA3 is
3 is transmitted to the satellite distribution facility 132 in a random order, and transmitted from the satellite distribution facility 132 to the theaters 122-1 and 122-.
Are distributed to 2,... (Step SC1).

FIG. 18 is a flowchart showing the flow of the reproducing process on the reproducing side. As shown in FIG. 18, the encrypted non-serial video data 45 is input to the serializing device 152 via the satellite receiving device 151 of the theater 122. (Step SD1). The encrypted non-serial video data 45 is stored in the hard disk 63 of the serializer 152, and thereafter, the processes of steps SB2 to SB4 are performed in the same manner as in the movie distribution and screening system in the first embodiment. As a result, an image according to the serial image data 41 is projected from the projection unit 75 of the projector 52, and a movie is screened.

B-5: Supplement According to the above-described second embodiment, the same effects as those of the first embodiment can be obtained. Furthermore, in the second embodiment, it is not necessary to duplicate the distribution media in the movie distributor 120, so that the labor required in the movie distributor 120 can be significantly reduced. Various modifications described in the first embodiment may be applied to the second embodiment. However, in the second embodiment, not only the projector 52 and the serializer 152 but also the satellite receiver 151 may be integrated.

In the second embodiment, the example has been described in which the preparation for canceling the encryption by the satellite distribution equipment 132 is completed in advance in the satellite receiver 151 on the reproduction side. The encryption key may be notified from the movie distributor 120 to the theater 122. For example, the movie distributor 120 notifies the theater 122 of the information indicating the encryption key using a communication means such as a telephone, and the user at the theater 122 operates the satellite receiver 151 using the information to transmit the satellite distribution equipment. 132 may be decrypted.

C: Overall Supplement As described above, according to the embodiments of the present invention, it is possible to safely distribute and show a movie using digital media. In addition, in each embodiment of the present invention,
Since the distribution cost and the screening equipment cost are reduced by adopting a general standard such as DVD-Video (for example, the distribution cost is about 1/100 of the conventional and the screening equipment cost is about 1/4 of the conventional), 35 mm The creation of a new business model is expected as well as the mere replacement of a conventional system using a file.

For example, a conventional theater needs to be used by a large number of spectators in order to collect movie distribution costs, screening equipment costs, and the like, and the installation location is a downtown area where a large number of customers can be expected. There were many things. In other words, it can be said that those who do not go to the downtown were kept away from the movie. According to the embodiments of the present invention, since the cost of movie distribution and screening equipment can be significantly reduced, theaters can be installed in areas other than downtown. In other words, it becomes possible to give people who had to cut off in the conventional system a chance to watch a movie in a theater.

Further, a significant reduction in movie distribution costs and screening equipment costs may promote diversification of the theater form itself. For example, prepare a private sense theater with a size of 20 to 50 seats, and provide a waiting service etc. to attract people who can not relax in the usual theater space and do not go to the theater to watch movies. Is also conceivable. When trying to realize such a theater in a conventional system, the burden on the user becomes unrealistically high. However, according to each embodiment of the present invention, such a theater can be realized. It is.

Each embodiment of the present invention is effective not only for creating a new business model but also for improving the profitability of an existing theater. For example, in a cinema complex in which one theater having a size of 200 to 500 seats and a plurality of small theaters having a size of 50 to 100 seats are combined, the movie distribution and screening system according to each of the above embodiments is adopted for a plurality of small theaters. In a theater with up to 500 seats, it is conceivable to improve the profitability of the entire cinema complex by adopting a conventional system using 35 mm film.

In each of the above-described embodiments, an example is shown in which the present invention is applied to the distribution and screening of a movie. However, the present invention is not limited to this, and various systems for distributing and reproducing images to be protected are provided. Applicable to

[0061]

As described above, according to the present invention,
Since video data in which the order of the plurality of unit video data is not in chronological order is distributed, the video data is
It is possible to prevent unauthorized reproduction or duplication of video data even if it is in the hands of the user. That is, video data (for example, movie data) requiring safe distribution can be safely distributed and reproduced.

Further, if the video data is distributed and distributed to a plurality of recording media, even if any one of the recording media reaches the hands of a third party, illegal reproduction or duplication of the video data can be prevented. Can be. That is, safety can be further improved. Furthermore, if the video data is distributed after being encrypted, the security can be further improved.

Further, if the video data distributed to each reproduction side is encrypted by an encryption method corresponding to the reproduction side and distributed, the video data distributed to any one of the reproduction sides becomes the third data.
Even if used illegally by a user, the security of the video data supplied to another playback side can be ensured. Further, by preventing the decrypted video data from being output to the outside on the reproducing side, the security can be further improved.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing an overall configuration of a movie distribution and screening system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a distribution-side device 20 configuring the movie distribution and screening system.

FIG. 3 is a block diagram showing a configuration of a computer system 22 configuring the distribution-side device 20.

FIG. 4 is a conceptual diagram showing a process of creating distribution DVD-ROMs 15-1 to 15-3 in the computer system 22.

FIG. 5 is a block diagram showing a configuration of a reproducing apparatus 50 constituting the movie distribution and screening system.

FIG. 6 is a block diagram showing a configuration of a serialization device 51 constituting the reproduction-side device 50.

FIG. 7 is a block diagram showing a configuration of a projector 52 constituting the reproduction-side device 50.

FIG. 8 is a conceptual diagram showing a process of reproducing data stored in distribution DVD-ROMs 15-1 to 15-3 on the reproduction side of the movie distribution and screening system.

FIG. 9 is a flowchart showing a flow of a distribution process on a distribution side of the movie distribution screening system.

FIG. 10 is a flowchart showing a flow of a reproducing process on the reproducing side of the movie distribution and screening system.

FIG. 11 is a block diagram showing a configuration of a reproducing apparatus 110 in which the serializing device 51 and the projector 52 of the movie distribution and screening system are integrated.

FIG. 12 is a conceptual diagram showing an overall configuration of a movie distribution and screening system according to a second embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration of a distribution-side device 130 configuring the movie distribution and screening system.

FIG. 14 is a block diagram showing a configuration of a computer system 131 constituting the distribution apparatus 20.

FIG. 15 is a block diagram showing a configuration of a playback-side device 150 configuring the movie distribution and screening system.

FIG. 16 is a block diagram showing a configuration of a serialization device 152 configuring the reproduction-side device 150.

FIG. 17 is a flowchart showing a flow of a distribution process on a distribution side of the movie distribution screening system.

FIG. 18 is a flowchart showing a flow of a reproduction process on the reproduction side of the movie distribution and screening system.

FIG. 19 is a conceptual diagram schematically showing a conventional movie distribution and screening system.

[Explanation of symbols]

20, 130 ... distribution side device, 21 ... film reading device, 22, 131 ... computer system, 5
0, 110, 150... Playback-side device, 51, 152.
Serializer 52, Projector 132, Satellite distribution equipment 151, Satellite receiver

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigechi Nakamura 10-1 Nakazawa-cho, Hamamatsu-shi, Shizuoka Prefecture F-term in Yamaha Corporation (reference) 5C053 FA13 FA14 FA23 FA24 FA27 GB01 GB09 LA20 5C064 CA14 CC04 DA09 5D044 AB07 BC01 BC04 CC04 DE12 DE24 GK12 GK17 HL08

Claims (12)

[Claims] 1. A video distribution / reproduction method for distributing video data obtained by arranging a plurality of unit video data in chronological order from a distribution side to a reproduction side and reproducing the video data distributed from the distribution side on the reproduction side. A change step of changing the order of a plurality of unit video data constituting the video data on the distribution side; and distributing the video data in which the order of the plurality of unit video data has been changed in the change step from the distribution side to the reproduction side. A distributing step; a restoring step of rearranging a plurality of unit video data constituting the video data distributed in the distributing step on the reproducing side in a time series; and a plurality of unit videos in the restoring step on the reproducing side. A playback step of playing back the video data in which the data has been rearranged. 2. In the distribution step, the video data in which the order of the plurality of unit video data has been changed in the changing step is dispersedly stored in a plurality of recording media, and the plurality of storage media are reproduced from the distribution side. Side, and in the restoration step, generate video data by combining data stored in the plurality of recording media distributed in the distribution step, and generate a plurality of unit video data constituting the video data. 2. The video distribution / reproduction method according to claim 1, wherein the images are rearranged in time series. 3. A distributing side has an encryption step of encrypting video data to be distributed, and a reproducing side has a decryption step of decrypting the video data distributed in the distribution step. The video distribution / reproduction method according to claim 1, wherein: 4. The method according to claim 1, wherein in the encrypting step, encryption is performed using an encryption method according to a reproducing side, and in the decrypting step, decryption is performed using an encryption method according to a reproducing side. The video distribution / reproduction method according to claim 3, wherein 5. A video distribution device provided on a distribution side for realizing the video distribution / reproduction method according to claim 1, wherein the changing means changes a sequence of a plurality of unit video data constituting the video data. A video distribution-side device comprising: 6. The video according to claim 5, further comprising recording means for distributing and recording the video data in which the order of the plurality of unit video data has been changed by the changing means on a plurality of recording media. Distribution device. 7. The apparatus according to claim 5, further comprising an encryption unit for encrypting the video data to be distributed. 8. The apparatus according to claim 7, wherein said encryption means performs encryption using an encryption method corresponding to a reproduction side. 9. A video reproducing apparatus provided on a reproducing side for realizing the video distributing / reproducing method according to claim 1, wherein a plurality of unit video data constituting the video data distributed from the distributing side are provided. A video reproducing apparatus comprising: a restoring unit for rearranging the video data in a time series; and a reproducing unit for reproducing the video data obtained by rearranging a plurality of unit video data by the decompressing unit. 10. The video reproducing apparatus according to claim 9, further comprising: decryption means for decrypting video data distributed from the distribution side. 11. A video distribution / reproduction method for distributing encrypted video data from a distribution side to a reproduction side and reproducing the video data distributed from the distribution side on the reproduction side. A video playback side device, comprising: decryption means for decrypting video data distributed from the distribution side; reproduction means for reproducing video data decrypted by the decryption means; and encryption. A video playback side device comprising: protection means for prohibiting output of video data decrypted by the decryption means to the outside. 12. A recording medium used for realizing the video distribution / playback method according to claim 1, wherein video data in which the order of a plurality of unit video data is changed is recorded. Medium.