JP2019009541A - Moving image viewing system - Google Patents

Abstract

To provide a moving image viewing system capable of identifying a person who made illegal copy (a leak source in a case where the illegal copy is leaked) even in a case where a display screen is illegally copied by being directly imaged by a camera or a video camera.SOLUTION: A moving image viewing system 1 comprises a moving image distribution server 3 and a moving image reproduction terminal 5. The moving image distribution server 3 includes: a streaming data generation part 32 which generates streaming moving image data; a watermark generation part 33 which generates a watermark including information capable of identifying a distribution demander (viewer); and a transmission part 35b which transmits the streaming moving image data and the watermark. The moving image reproduction terminal 5 includes: a receiving part 55a which receives streaming moving image data and a watermark; and a display part 53 by which, when reproducing and displaying the streaming moving image data, the streaming moving image data are displayed while superposing the watermark inside of a display screen of a streaming moving image in a visible manner.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a moving image distribution server, a moving image playback terminal, and a moving image viewing system including the moving image distribution server and the moving image playback terminal.

  Conventionally, a watermark (digital watermark) is used as identification information in order to prevent unauthorized copying and unauthorized use of digital contents such as images and videos.

  Here, for example, in Patent Document 1, in order to facilitate the sale and distribution of content while preventing unauthorized use of the content, the purchaser ID is assigned to the invisible digital watermark on the content related to the moving image. A technique (content sales system) is disclosed that embeds as “1” and embeds characters “sample” indicating trial use as a visible digital watermark 2.

  According to the content sales system described in Patent Document 1, when a purchaser officially purchases previewed or previewed content, the purchaser receives a private key dedicated from the owner terminal, and is visible using this private key. The digital watermark 2 (character “sample”) is removed. Therefore, if this private key is not obtained, the characters “sample” are always displayed in the content, and the commercial value of this content will be reduced. Further, even if the content is properly purchased, if the copy or sale is performed, an unauthorized purchaser can be identified by detecting the invisible digital watermark 1 embedded in the content.

JP 2002-236669 A

  As described above, according to the technique (content sales system) described in Patent Document 1, even if a person who has purchased the content is authorized to copy and sell the invisible digital watermark embedded in the content By detecting 1, an unauthorized purchaser can be identified.

  However, in the technique described in Patent Document 1, for example, when the display screen (viewing screen) is directly captured by a camera, a video camera, or the like, it is not possible to prevent the outflow of information included in video content or video, It was also difficult to identify the source of the spill.

  By the way, the streaming video can provide the video to the viewer without leaving the video data in the video playback terminal (memory, HDD, etc.). Therefore, unauthorized copying of moving image data can be prevented, and leakage of information included in moving image content and moving images can be prevented. However, as in the case described above, when the display screen (viewing screen) is directly captured by a camera or a video camera, it is not possible to prevent the leakage of the moving image content or the information contained in the moving image. It was difficult to identify.

  The present invention has been made to solve the above-described problems, and even if the display screen (streaming video) is illegally copied by being directly photographed by a camera or a video camera, the illegal copy is made. A moving image distribution server, a moving image reproduction terminal, and a moving image viewing system including the moving image distribution server and the moving image reproduction terminal, which can identify a person who has performed the operation (the outflow source when the unauthorized copy leaks) The purpose is to provide.

  The video distribution server according to the present invention includes a receiving unit that receives a streaming video distribution request, a video generation unit that generates streaming video data in response to the distribution request, and information that can identify a streaming video distribution requester The watermark generation means for generating the generated watermark and the streaming video data and the watermark so that the watermark is visually displayed in the streaming video display screen when the streaming video data is reproduced and displayed. Transmission means for transmitting the mark.

  According to the moving image distribution server of the present invention, when a watermark (digital watermark) including information that can specify a distribution requester (that is, a viewer) is generated, and streaming moving image data is reproduced and displayed. The streaming video data and the watermark are transmitted (distributed) so that the watermark is visibly displayed in the streaming video display screen. Therefore, even if the display screen (streaming video) is shot with a camera, video, or the like, the viewer (photographer) can be identified from the watermark that is shown in the shot display screen. As a result, even if the display screen (streaming video) is illegally copied by shooting directly with a camera, video camera, etc., the person who made the illegal copy (if the illegal copy is leaked, it will be leaked) Original) can be specified.

  In the moving image distribution server according to the present invention, it is preferable that the reception unit receives the login information of the distribution requester, and the watermark generation unit generates the watermark using the login information.

  In this case, using the log-in information of the distribution requester (viewer), a watermark capable of specifying the viewer (photographer (illegal copy person) if taken) / outflow source if leaked) is obtained. be able to.

  In the moving image distribution server according to the present invention, it is preferable that the watermark generation unit generates a watermark by encrypting information that can specify a distribution requester.

  In this case, information that can specify the distribution requester is encrypted and a watermark is generated. Therefore, it is difficult for the viewer (photographer / illegal copy person) to infer (predict) the generation pattern of the watermark. Therefore, for example, it is possible to prevent alteration of the watermark due to image processing or the like.

  In the moving image distribution server according to the present invention, it is preferable that the watermark generation unit encrypts the viewing history information generated in association with the login information of the distribution requester to generate the watermark.

  In this case, viewing history information associated with the login information of the distribution requester is generated, the viewing history information is encrypted, and a watermark is generated. That is, it is possible to shorten the watermark by encrypting only the viewing history information having a smaller data amount, rather than encrypting all the login information.

  In the moving image distribution server according to the present invention, it is preferable that the watermark generating means generates a watermark consisting of an alphanumeric string of 4 to 6 characters by encrypting the viewing history information.

  In this case, by encrypting the viewing history information, the viewing history information is converted into an alphanumeric string of 4 to 6 characters (that is, a relatively short character string). Therefore, when the display screen is directly photographed, it is possible to prevent the watermark from being lost (part of which is not shown). Here, if the character string (watermark) becomes long, for example, when image quality deterioration or information loss (partial loss) occurs, there is a high possibility that the character string (watermark) cannot be identified, It may be difficult to identify the source of the spill. On the other hand, by shortening the character string (watermark), it is possible to improve durability against image quality deterioration and information loss. Further, by shortening the character string (watermark), a plurality of character strings (watermarks) can be arranged on the display screen.

  In the video distribution server according to the present invention, when the receiving unit receives information indicating that the capture operation for the display screen is detected, and when the receiving unit receives information indicating that the capture operation is detected, It is preferable that the transmission means automatically transmits an e-mail describing information indicating that the capture operation has been detected to an e-mail address of an administrator registered in advance.

  In this case, when information indicating that a capture operation on the display screen has been detected is received, an e-mail containing information indicating that the capture operation has been detected is sent to the administrator's registered e-mail. Automatically sent to your e-mail address. Therefore, it is possible to notify the administrator (content manager) that the display screen (viewing screen) has been captured by the capture operation. As a result, the administrator (content manager) can know that there is a possibility of information leakage due to the capture operation during moving image reproduction, and can take measures to prevent the information leakage.

  When the video playback terminal according to the present invention plays back and displays the streaming video data received from the terminal-side receiving means and the terminal-side receiving means for receiving the streaming video data and the watermark transmitted from the video distribution server. And a display means for visually displaying the watermark in the display screen of the streaming video.

  According to the video playback terminal of the present invention, when a watermark including information that can specify a distribution requester (that is, a viewer) is received and streaming video data is played back and displayed (moving video playback). In addition, the watermark is visibly displayed on the display screen of the streaming video. Therefore, even if a streaming video is shot with a camera, video, or the like, the viewer (photographer) can be identified from the watermark shown in the shot display screen. As a result, even if the display screen (streaming video) is illegally copied by shooting directly with a camera, video camera, etc., the person who made the illegal copy (if the illegal copy is leaked, it will be leaked) Original) can be specified.

  In the video playback terminal according to the present invention, it is preferable that the display means displays a plurality of watermarks in the display screen of the streaming video.

  In this case, a plurality of watermarks are displayed in the streaming video display screen. Therefore, for example, even when only a part (one corner) of the display screen is cut off, it is possible to prevent the watermark from being lost.

  At that time, in the video playback terminal according to the present invention, it is preferable that the display means displays a plurality of watermarks arranged substantially uniformly over the entire area of the streaming video display screen.

  In this case, a plurality of watermarks are arranged and displayed substantially uniformly over the entire area of the streaming video display screen. Therefore, for example, even when only a part of the screen is cut out, it is possible to more reliably prevent missing of the watermark.

  In the moving image playback terminal according to the present invention, it is preferable that the display means displays the watermark with border characters.

  By the way, when placing the watermark in the display screen (viewing screen), it is preferable to display it in a thin layer so as not to interfere with the viewing of the video, but the color of the background video and the character (watermark) It may be difficult to discriminate when. However, in this case, since the watermark is displayed with outline characters, even if the watermark is displayed thinly so as not to hinder the viewing of the moving image, it is easily distinguishable from the background, and the watermark is reliably recognized (extracted). It becomes possible.

  In the video playback terminal according to the present invention, it is preferable that the display means displays that the watermark includes information that can identify the viewer before starting to display the streaming video.

  In this case, before the display (playback) of the streaming video is started, it is displayed that the watermark includes information that can specify the viewer (distribution requester). Therefore, by notifying the viewer in advance, the moving image can be distributed after obtaining the consent of the viewer. Further, since a warning is given to a person who is trying to copy illegally, the effect of suppressing unauthorized copying (an effect of suppressing the leakage of confidential information) can be exhibited.

  A video playback terminal according to the present invention automatically detects to a video distribution server information indicating that a capture operation has been detected when a capture operation is detected by the detection unit, and a detection unit that detects a capture operation on the display screen. It is preferable to further comprise terminal-side transmission means for transmitting to the terminal.

  In this case, when a capture operation is detected, information indicating that the capture operation has been detected is automatically transmitted to the moving image distribution server. Therefore, in addition to the case where the display screen is captured, the viewer who has performed the capture operation can be specified also when the display screen is captured.

  In the video playback terminal according to the present invention, it is preferable that the display means displays that the detection information of the capture operation is notified when the capture operation is detected before the display of the streaming video is started.

  In this case, it is displayed that the detection information of the capture operation is notified when the capture operation is detected before the display of the streaming video is started. Accordingly, by notifying the viewer in advance that the capture operation is being monitored, moving image distribution can be performed with the viewer's consent. Further, since a warning is given to a person who is trying to copy illegally, the effect of suppressing unauthorized copying (an effect of suppressing the leakage of confidential information) can be exhibited.

  A moving image viewing system according to the present invention includes any one of the above moving image distribution servers and any one of the above moving image reproduction terminals.

  According to the video viewing system of the present invention, since any one of the above video distribution servers and any one of the above video playback terminals is provided, a display screen (streaming video) is directly captured by a camera, a video camera, or the like. Thus, even if it is illegally copied, it is possible to identify the person who made the illegal copy (the outflow source if the illegal copy leaked).

  The video playback terminal according to the present invention includes a terminal-side receiving unit that receives streaming video data transmitted from a video distribution server, and streaming video data received by the terminal-side receiving unit when played back and displayed. Detection means for detecting a capture operation for a moving image display screen, and terminal-side transmission means for automatically transmitting information indicating that the capture operation has been detected to the video distribution server when the detection operation is detected by the detection means It is characterized by providing.

  According to the video playback terminal of the present invention, when a capture operation is detected, information indicating that the capture operation has been detected is automatically transmitted to the video distribution server. Therefore, it is possible to recognize that the display screen has been captured by the capture operation and to specify the viewer who has performed the capture operation.

  According to the present invention, even if the display screen (streaming video) is illegally copied by being directly photographed by a camera or a video camera, the person who made the illegal copy (if the illegal copy is leaked) Can be identified.

1 is a block diagram illustrating a configuration of a moving image viewing system (moving image distribution server and moving image reproduction terminal) according to a first embodiment. It is a figure which shows an example of viewing ID (viewing history information). It is a figure which shows an example of the display screen (viewing screen) on which the watermark was visibly overlapped and displayed. It is a sequence diagram which shows the procedure of the streaming moving image delivery process (watermark superimposition display process) by the moving image viewing system (a moving image delivery server and a moving image playback terminal) according to the first embodiment. It is a block diagram which shows the structure of the video viewing system (a video delivery server and a video reproduction terminal) which concerns on 2nd Embodiment. It is a sequence diagram which shows the procedure of the streaming moving image delivery process (capture operation monitoring process) by the moving image viewing system (a moving image delivery server and a moving image reproduction terminal) concerning 2nd Embodiment.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used for the same or corresponding parts. Moreover, in each figure, the same code | symbol is attached | subjected to the same element and the overlapping description is abbreviate | omitted.

(First embodiment)
First, the configuration of the video viewing system 1 (the video distribution server 3 and the video playback terminal 5) according to the first embodiment will be described with reference to FIG. FIG. 1 is a block diagram showing a configuration of a moving image viewing system 1 (moving image distribution server 3 and moving image reproduction terminal 5) according to the first embodiment.

  The moving image viewing system 1 includes a moving image distribution server 3 and a moving image reproduction terminal (client terminal) 5. In particular, the moving image viewing system 1 is configured so that even if the display screen (streaming moving image) is illegally copied by being directly photographed by a camera or a video camera, In the case of spillage, it has a function that makes it possible to specify the spill source). The video distribution server 3 and the video playback terminal 5 are configured to be able to transmit and receive data to and from each other via a communication network 110 such as the Internet or a LAN. The communication network 110 may be wired or wireless, and may include both. In addition, although FIG. 1 shows an example in which there is one moving image playback terminal 5, a plurality of moving image playback terminals 5 may be provided.

  The video distribution server 3 accepts a login and video distribution request from the video playback terminal 5 and distributes the requested streaming video and a watermark superimposed on the video to the video playback terminal 5. The video distribution server 3 mainly includes an authentication unit 31, a streaming data generation unit 32, a watermark (W / M) generation unit 33, a storage unit 34, and a communication unit 35 (reception unit 35a, transmission unit 35b). It has.

  The authentication unit 31 performs authentication in response to a login request from the video playback terminal 5 (distribution requester / viewer) received by the communication unit 35 (reception unit 35a). When performing login authentication, the authentication unit 31 receives the “viewer ID” of the viewer (distribution requester) received from the video playback terminal 5, the “IP address of the viewer (video playback terminal 5)”, and “viewing date and time”. (Authentication date and time) "(corresponding to login information described in claims) is acquired and stored (recorded) in the storage unit 34 (database). At that time, the authentication unit 31 associates (corresponds) the login information with the viewing ID represented by an integer (corresponding to the viewing history information described in the claims) as the viewing history. 34.

  Thereafter (after login authentication), the authentication unit 31 accepts a video distribution request (including information that can specify a video for which distribution is requested) received from the video reproduction terminal 5 received by the communication unit 35 (reception unit 35a). At that time, when the viewer agrees that the watermark displayed on the display screen (viewing screen) includes information that can identify the viewer (distribution requester), the authentication unit 31 It is preferable to accept a moving image distribution request only. When a moving image distribution request is accepted, information to that effect is output to the streaming data generation unit 32.

  When a streaming distribution request is received, the streaming data generation unit 32 generates streaming moving image data from the moving image content stored (stored) in the storage unit 34 in response to the distribution request. That is, the streaming data generation unit 32 functions as a moving image generation unit described in the claims. The generated streaming image data is output to the communication unit 35 (transmission unit 35b).

  The watermark generation unit 33 uses login information such as “viewer ID” and “IP address of viewer (video playback terminal 5)” described above, that is, information that can specify the viewer (distribution requester), A watermark (digital watermark) including the information is generated. That is, the watermark generation unit 33 functions as a watermark generation unit described in the claims. In this embodiment, the above-described viewing ID (viewing history information) registered in association with the login information is used as information that can identify the viewer (distribution requester), and the viewing ID is encrypted, It was set as the structure which produces | generates a mark.

  In particular, the watermark generation unit 33 encrypts the viewing ID (viewing history information), thereby converting the viewing ID into k-digit (for example, 4 to 6 digits) n-ary number (for example, hexadecimal number (0 to 9, a to). A watermark consisting of 16 digits of f) to 62 digits (digits represented by 62 characters of 0 to 9, a to z, and A to Z)) is generated. That is, the watermark generation unit 33 encrypts the viewing ID and generates a watermark consisting of an alphanumeric string (key character string) of 4 to 6 characters (4 to 6 digits). In the present embodiment, the viewing ID is encrypted and converted into an alphanumeric string (key character string) consisting of 5 characters (5 digits) in 62-hexadecimal.

  By encrypting the viewing ID (viewing history information) in this way, it becomes difficult to analogize the pattern of the watermark (key character string), so that alteration of the watermark (key character string) can be prevented. Further, by encrypting only the viewing ID, the watermark (key character string) can be made shorter. For this reason, durability against a missing watermark (key character string) (information missing) is improved. In addition, a plurality of watermarks (key character strings) can be arranged on the display screen (viewing screen).

  In the present embodiment, encryption is performed based on a unique algorithm in order to shorten the watermark (key character string). Here, as an encryption procedure, first, a viewing ID (integer) is used as an input value, and a header value of an n-ary number (for example, a 16-62 digit number) is determined by a random number. Next, the viewing ID is converted to an n-ary number of “number of key character strings (k) −1 (for example, 4) digits”. Subsequently, the value of each digit is shifted (added for each digit) based on a shift digit string (for example, a number of 1 to n corresponding to each digit) corresponding to the header. In addition, each digit is rearranged based on a sorted numeric string corresponding to the header (for example, a number of 1 to (k-1) corresponding to each digit). Then, the header is inserted between predetermined positions (j (≦ k) digit and j + 1 digit) to complete the encryption (key character string). The generated watermark (key character string) is output to the communication unit 35 (transmission unit 35b).

  The storage unit 34 includes, for example, a hard disk drive (HDD) or a memory such as an SRAM, a DRAM, or a flash memory (EEPROM). As described above, the storage unit 34 uses “viewer ID”, “IP address of viewer (video playback terminal 5)”, and “viewing date / time (authentication date / time)” as a viewing history expressed as an integer. The ID is associated (stored) and stored. An example of viewing history information stored in the storage unit 34 is shown in FIG. The storage unit 34 also stores moving image content.

  The communication unit 35 is a network interface that controls communication performed via the network 110. The communication unit 35 performs data communication according to a protocol such as TCP / IP. The communication unit 35 includes a receiving unit 35a that receives data (corresponding to a receiving unit described in claims) and a transmitting unit 35b that transmits data (corresponding to a transmitting unit described in claims). ing.

  As described above, the receiving unit 35a receives a login request, a streaming video distribution request, and the like from the video playback terminal 5 (viewer / distribution requester). On the other hand, the transmission unit 35b sends the streaming image data generated by the streaming data generation unit 32 and the watermark generated by the watermark generation unit 33 to the video playback terminal 5 (viewer / distribution requester). Send. That is, the transmission unit 35b transmits the streaming video data and the watermark so that the watermark is visibly displayed in the streaming video display screen when the streaming video data is reproduced and displayed. For this reason, when transmitting the streaming video data, the transmission unit 35b adds a watermark to the timeline of the streaming video data and transmits it, for example.

  On the other hand, the video playback terminal 5 is a terminal (client terminal) such as a personal computer (PC) or a smartphone. The viewer can view the streaming video by logging in to the video distribution server 3 from the video playback terminal 5 and making a video distribution request. The video playback terminal 5 mainly includes an input unit 51, a watermark overlay unit 52, a display unit 53, and a communication unit 55 (a reception unit 55a and a transmission unit 55b).

  The input unit 51 includes, for example, a keyboard, a pointing device, a touch panel, or the like, and receives operation inputs such as a login request from a viewer and a moving image distribution request. When the viewer (distribution requester) logs in to the moving image distribution server 3, the viewer opens a login screen and inputs a viewer ID and the like. Further, when the viewer requests the moving image distribution server 3 to distribute the moving image, the viewer selects and inputs the moving image content desired to be distributed from the moving image distribution request screen. The input information and additional information (such as an IP address) are output to the communication unit 55 (transmission unit 55b).

  The watermark superimposing unit 52 superimposes the watermark (key character string) on the streaming video data received from the video distribution server 3 and outputs the data. At that time, the watermark superimposing unit 52 arranges and superimposes a plurality of watermarks uniformly (or substantially equally) over the entire area of the streaming video display screen. The streaming video data on which the watermark is superimposed by the watermark overlay unit 52 is output to the display unit 53.

  The display unit 53 (corresponding to the display means described in the claims) is composed of, for example, a liquid crystal display (LCD). The display unit 53 displays, for example, various information for the viewer to perform operations such as login and moving image distribution request, a warning screen (details will be described later), a streaming moving image, and the like.

  The display unit 53 displays the streaming video data on which the watermark (key character string) is superimposed by the watermark overlay unit 52. That is, the display unit 53 visibly displays the watermark on the streaming video display screen. More specifically, the display unit 53 displays a plurality of watermarks evenly arranged over the entire area of the display screen. In addition, the display unit 53 displays a plurality of watermarks (key character strings) on the display screen so as to be thinly stacked so as not to prevent viewing of the streaming video. In addition, since it becomes difficult to discriminate when the color of the moving image that is the background is close to the color of the character, the character is a border character, so that it can be easily distinguished from the background.

  Here, FIG. 3 shows an example of a display screen (viewing screen) on which watermarks are visibly superimposed. In the example shown in FIG. 3, 49 watermarks (key character strings) are arranged and displayed in a matrix (7 rows and 7 columns) on the entire display screen. It is preferable that the character size, color, density (transparency), number, arrangement, etc. of the watermark (key character string) can be specified (can be set) from the system setting menu, for example.

  Furthermore, before starting to display the streaming video data, the display unit 53 displays that the watermark includes information that can identify the viewer (attention screen) and asks the viewer for consent. . Here, when the viewer agrees, information (watermark display consent information) indicating that the viewer has agreed to display a watermark capable of specifying the viewer is transmitted to the video distribution server 3. The The moving image distribution server 3 distributes the streaming moving image when the watermark display agreement information is received.

  The communication unit 55 is a network interface that controls communication performed via the network 110. The communication unit 55 performs data communication according to a protocol such as TCP / IP. The communication unit 55 includes a receiving unit 55a that receives data (corresponding to a terminal-side receiving unit described in claims) and a transmitting unit 55b that transmits data (corresponding to a terminal-side transmitting unit described in claims). ).

  As described above, the receiving unit 55a receives streaming video data, watermarks, and the like transmitted from the video distribution server 3. On the other hand, the transmission unit 55b transmits a login request, a moving image distribution request, watermark display agreement information, and the like to the moving image distribution server 3.

  Next, the operation of the video viewing system 1 (the video distribution server 3 and the video playback terminal 5) will be described with reference to FIG. Here, FIG. 4 is a sequence diagram showing a procedure of streaming moving image distribution processing (watermark superimposed display processing) by the moving image viewing system 1 (the moving image distribution server 3 and the moving image reproduction terminal 5).

  First, in step S100, when the input unit 51 of the video playback terminal 5 receives an operation input (viewer ID or the like) for requesting login to the video distribution server 3 by a viewer (distribution requester), the communication unit 55. A login request is transmitted from the transmission unit 55b to the moving image distribution server 3 (step S102).

  When the login request is received by the communication unit 35 (reception unit 35a) of the video distribution server 3, the authentication unit 31 performs login authentication (step S104). Also, login information (viewer ID, IP address, viewing date, etc.) is stored (recorded) in the storage unit 34 in association with the viewing ID (viewing history information). Then, information indicating that the login has been authenticated is returned to the video viewing terminal 5 (step S106).

  Subsequently, in step S108, when the input unit 51 of the video playback terminal 5 receives an operation input requesting video distribution by a viewer (distribution requester) (such as distribution request video specifying information), the communication unit 55 ( From the transmission unit 55b), a moving image distribution request is transmitted to the moving image distribution server 3 (step S110).

  When a video distribution request is received by the video distribution server 3, a viewer can be specified in the watermark (W / M) displayed in a superimposed manner on the display screen (viewing screen) before starting the video distribution. Information for informing that the information is included in advance (calling attention) and obtaining consent is transmitted to the video playback terminal 5 (step S112). And it is displayed on the display part 53 of the moving image reproduction terminal 5 that the information which can identify a viewer is contained in the watermark displayed by overlapping on a display screen (step S114). Therefore, when the viewer agrees that the watermark displayed on the display screen includes information that can identify the viewer (warning), information indicating the consent (watermark) Display consent information) is returned to the moving image distribution server 3 (step S116).

  A reply (watermark display consent information) is received indicating that the watermark displayed on the display screen (viewing screen) contains information that can identify the viewer (warning). In such a case, the streaming data generating unit 32 of the moving image distribution server 3 generates the streaming data of the moving image content desired by the viewer (step S118). Also, a watermark (key character string) is generated by encrypting the viewing ID (step S120). Since the method for generating the watermark (key character string) is as described above, detailed description thereof is omitted here. Then, the streaming data generated in step S118 and the watermark (key character string) generated in step S120 are transmitted to the video playback terminal 5 (step S122).

  In step S124, streaming data and a watermark (key character string) are received by the moving image playback terminal 5, and the watermark (key character string) is visibly superimposed on the streaming image display screen (viewing screen). Is displayed. At that time, as shown in FIG. 3, a plurality of watermarks (key character strings) are arranged and displayed on the entire display screen.

  As described above in detail, according to the present embodiment, when streaming video data is reproduced and displayed (during video playback), a distribution requester (that is, a viewer) is displayed in the streaming video display screen. A watermark including identifiable information (viewing ID) is visually displayed. Therefore, even if a streaming video is shot with a camera, video, or the like, the viewer (photographer) can be identified from the watermark shown in the shot display screen. As a result, even if the display screen (streaming video) is illegally copied by shooting directly with a camera, video camera, etc., the person who made the illegal copy (if the illegal copy is leaked, it will be leaked) Original) can be specified.

  According to this embodiment, information (viewing ID) that can identify the distribution requester (viewer) is encrypted to generate a watermark. Therefore, it is difficult for the viewer (photographer / illegal copy person) to infer (predict) the generation pattern of the watermark. Therefore, for example, it is possible to prevent alteration of the watermark due to image processing or the like.

  According to this embodiment, the viewing ID (viewing history information) associated with the login information of the distribution requester is generated, the viewing ID is encrypted, and the watermark (key character string) is generated. That is, it is possible to shorten the watermark (key character string) by encrypting only the viewing ID (viewing history information) having a smaller amount of data rather than encrypting all the login information. .

  According to the present embodiment, when the viewing ID (viewing history information) is encrypted, the viewing ID is converted into an alphanumeric string (namely, a relatively short string) of 5 characters (5 digits). Therefore, when the display screen is directly photographed, it is possible to prevent the watermark from being lost (part of which is not shown).

  Further, according to the present embodiment, a plurality of watermarks (key character strings) are displayed in the streaming video display screen. Therefore, for example, even when only a part of the screen is cut off, it is possible to prevent a watermark (key character string) from being lost.

  In particular, according to the present embodiment, a plurality of watermarks (key character strings) are evenly arranged and displayed in the entire area of the streaming video display screen (viewing screen). Therefore, for example, even when only a part of the screen is cut off, it is possible to more reliably prevent a watermark (key character string) from being lost.

  According to the present embodiment, since the watermark (key character string) is displayed with outline characters, even if it is displayed thinly so as not to hinder the viewing of the moving image, it can be easily distinguished from the background. Key character string) can be reliably recognized (extracted).

  According to the present embodiment, before the display of the streaming video is started, information indicating that the viewer can be specified is displayed in the watermark (attention screen). Therefore, by notifying the viewer in advance, the moving image can be distributed after obtaining the consent of the viewer. Further, since a warning is given to a person who is trying to copy illegally, the effect of suppressing unauthorized copying (an effect of suppressing the leakage of confidential information) can be exhibited.

(Second Embodiment)
In the first embodiment described above, a watermark that can identify the viewer is visually displayed on the display screen, thereby preventing unauthorized copying by directly taking a picture with a camera or video camera (unauthorized copyer / In addition, it is also possible to adopt a configuration in which the capture of the display screen by the capture operation is prevented (capture operator / source is specified).

  Therefore, next, the video viewing system 1B (the video distribution server 3B and the video playback terminal 5B) according to the second embodiment having a capture monitoring function will be described with reference to FIG. Here, the description of the same or similar configuration as in the first embodiment will be simplified or omitted, and different points will be mainly described. FIG. 5 is a block diagram showing a configuration of a moving image viewing system 1B (moving image distribution server 3B and moving image reproduction terminal 5B) according to the second embodiment. In FIG. 5, the same or equivalent components as those in the first embodiment are denoted by the same reference numerals.

  The moving image viewing system 1B is different from the moving image viewing system 1 described above in that the moving image viewing system 1B includes a moving image distribution server 3B and a moving image reproduction terminal 5B instead of the moving image distribution server 3 and the moving image reproduction terminal 5. The video distribution server 3B and the video playback terminal 5B are different from the video distribution server 3 and the video playback terminal 5 described above in that they further have a capture operation monitoring function. More specifically, the video playback terminal 5B further includes a capture operation detection unit 57 in addition to the configuration of the video playback terminal 5 described above. Similarly, the moving image distribution server 3B further includes an electronic mail (Email) generation unit 37 in addition to the configuration of the moving image distribution server 3 described above.

  The capture operation detection unit 57 of the video playback terminal 5B monitors and detects a capture operation on the display screen. That is, the capture operation detection unit 57 functions as detection means described in the claims. More specifically, when the viewer's consent (consent for monitoring the capture operation) is obtained before the streaming video is played back, the capture operation detection unit 57 applies to the display screen while the streaming video is being played back. Monitor the capture operation. Here, the monitoring of the capture operation refers to monitoring that the key of the capture operation is not pressed and that specific capture software is not operating in another process. When the video playback player (display unit 53B) becomes inactive and monitoring of the capture operation cannot be performed, the video playback player screen (display screen) is blacked out so that the video playback player is activated. It is preferable to prompt.

  When the capture operation detection unit 57 detects a capture operation on the display screen, the capture operation detection unit 57 outputs information (capture operation report) indicating that the capture operation has been detected to the communication unit 55B (transmission unit 55bB).

  When the capture operation is detected by the capture operation detection unit 57, the communication unit 55B (transmission unit 55bB) transmits information (capture operation report) indicating that the capture operation has been detected to the moving image distribution server 3B. That is, the communication unit 55B (transmission unit 55bB) functions as a terminal-side transmission unit described in the claims.

  The display unit 53B displays a notification (notice screen) of notification of detection information of the capture operation when a capture operation on the display screen is detected before starting playback of the streaming video data, and displays to the viewer. Ask for consent. Here, if the viewer agrees, information indicating that the viewer agrees (capture monitoring consent information) is transmitted to the moving image distribution server 3B.

  On the other hand, when the moving image distribution server 3B receives the capture monitoring agreement information, the moving image distribution server 3B executes distribution of the streaming moving image. In addition, the communication unit 35B (receiving unit 35aB) of the moving image distribution server 3B receives information (capture operation report) indicating that a capture operation for the display screen (viewing screen) has been detected. Information indicating that a capture operation has been detected (capture operation report) is output to an email generation unit 37. When receiving information (capture operation report) indicating that a capture operation on the display screen has been detected, the moving image distribution server 3B records the log in the storage unit 34B in association with the viewer ID or the like.

  The e-mail generation unit 37 receives information indicating that a capture operation has been detected, and information on a viewer who has performed the capture operation (for example, the e-mail address of an administrator (contents administrator) registered in advance) An e-mail describing the viewer ID, IP address, etc.) is automatically generated. The generated e-mail is output to the communication unit 35B (transmission unit 35bB).

  The communication unit 35B (transmission unit 35bB) generates an e-mail (information indicating that a capture operation has been detected) generated by the e-mail generation unit 37 and information on a viewer who has performed the capture operation (for example, a viewer ID or IP E-mail with address etc.) is automatically sent to the e-mail address of the administrator (content manager) registered in advance.

  On the other hand, when the e-mail is received at a terminal (such as a PC) of an administrator (content manager), the e-mail pops up on the display. Thus, the administrator can recognize that the capture operation has been performed on the display image and the viewer who has performed the capture operation. Since other configurations are the same as or similar to those of the first embodiment described above, detailed description thereof is omitted here.

  Next, the operation of the video viewing system 1B (the video distribution server 3B and the video playback terminal 5B) will be described with reference to FIG. Here, FIG. 6 is a sequence diagram showing a procedure of streaming moving image distribution processing (capture operation notification processing) by the moving image viewing system 1B (the moving image distribution server 3B and the moving image reproduction terminal 5B).

  Since the processing in steps S200 to S210 is the same as the processing in steps S100 to S110 described above, detailed description thereof is omitted here.

  In step S212, in addition to the information that can identify the viewer being included in the watermark displayed on the display screen in an overlapping manner, it is notified in advance that the capture operation for the display screen is being monitored. Information for obtaining consent (by calling attention) is transmitted to the video playback terminal 5B. In addition to the fact that the watermark displayed on the display screen includes information that can identify the viewer, the fact that the capture operation is being monitored is displayed on the display unit 53B of the video playback terminal 5B. It is displayed (step S214). Therefore, if the viewer agrees that the watermark displayed on the display screen includes information that can identify the viewer and that the capture operation is monitored (warning), Information indicating the consent (watermark display consent information and capture monitoring consent information) is returned to the moving image distribution server 3B (step S216).

  Reply (watermark display) that the watermark displayed on the display screen agrees that the information that can identify the viewer is included and that the capture operation is monitored (warning) When the agreement information and the capture monitoring agreement information) are received, streaming data of the moving image content desired by the viewer is generated in the streaming data generation unit 32 of the moving image distribution server 3B (step S218). In addition, a watermark (key character string) is generated by encrypting the viewing ID (step S220). Since the method for generating the watermark (key character string) is as described above, detailed description thereof is omitted here. Then, the streaming data generated in step S218 and the watermark (key character string) generated in step S220 are transmitted to the video playback terminal 5B (step S222).

  In step S224, streaming data and a watermark (key character string) are received by the video playback terminal 5B, and the watermark (key character string) is visibly superimposed on the display screen (viewing screen) of the streaming image, and the display unit 53B. Is displayed.

  While the streaming video is being played back, the capture operation is detected (monitored) on the display screen (step S226). If a capture operation on the display screen is detected, information (capture operation report) indicating that a capture operation by the viewer has been detected is transmitted to the moving image distribution server 3B (step S228).

  When receiving information (capture operation report) indicating that the capture operation by the viewer has been detected, the moving image distribution server 3B records a log (step S230), and information indicating that the capture operation has been detected and capture. An e-mail in which information of the viewer who performed the operation (for example, a viewer ID, an IP address, etc.) is automatically generated is generated. Then, the e-mail is automatically transmitted to an e-mail address of a manager (content manager) registered in advance.

  According to the present embodiment, when a capture operation is detected, information (capture operation report) indicating that the capture operation has been detected is automatically transmitted to the moving image distribution server 3B. Therefore, in addition to the case where the viewing screen is photographed, the viewer who performed the capture operation can be specified also when the viewing screen is captured by the capture operation.

  Further, according to the present embodiment, when the information (capture operation report) indicating that the capture operation on the display screen is detected is received, the information indicating that the capture operation is detected and the capture operation are performed. An e-mail in which viewer information (for example, a viewer ID and an IP address) is described is automatically transmitted to the e-mail address of the administrator registered in advance. Therefore, it is possible to notify the administrator (content manager) that the display screen (viewing screen) has been captured by the capture operation. As a result, the administrator (content manager) can know that there is a possibility of information leakage due to the capture operation during moving image reproduction, and can take measures to prevent the information leakage.

  Furthermore, according to the present embodiment, when the capture operation for the display screen is detected before the display of the streaming video is started, notification of detection information of the capture operation is displayed (attention screen). . Therefore, by notifying the viewer in advance that the capture operation is being monitored, it is possible to start moving image distribution after obtaining the viewer's consent. Further, since a warning is given to a person who is trying to copy illegally, the effect of suppressing unauthorized copying (an effect of suppressing the leakage of confidential information) can be exhibited.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made. For example, the display form (size, number, arrangement, font, etc.) of the watermark (key character string) is not limited to the above embodiment.

  In the above-described embodiment, the watermark (key character string) is generated by encrypting the viewing ID. However, the watermark (key character string) is encrypted by encrypting other specific information (for example, the viewer ID and IP address). It may be generated. Also, the encryption method is not limited to the above embodiment. Furthermore, it is also possible to use it as a watermark (key character string) without performing encryption (the above information).

  In the second embodiment, the video playback terminal 5B is configured to superimpose a watermark on the streaming video and monitor the display screen capture operation when the streaming video data is played back and displayed. Only the capture operation on the display screen is monitored without superimposing a watermark on the video, and when the capture operation is detected, information indicating that the capture operation has been detected is automatically transmitted to the video distribution server. It is good also as composition to do.

1, 1B video viewing system 3, 3B video distribution server 5, 5B video playback terminal 31 authentication unit 32 streaming data generation unit 33 watermark generation unit 34, 34B storage unit 35, 35B communication unit 35a, 35aB reception unit 35b, 35bB transmission Unit 37 e-mail generation unit 51 input unit 52 watermark overlay unit 53, 53B display unit 55, 55B communication unit 55a, 55aB reception unit 55b, 55bB transmission unit 57 capture operation detection unit 100 watermark 110 communication network

The present invention relates to a moving picture viewing system.

The present invention has been made to solve the above-described problems, and even if the display screen (streaming video) is illegally copied by being directly photographed by a camera or a video camera, the illegal copy is made. who were (if unmoving primary copy has been spilled spills source) and to provide the dynamic image viewing system capable of specifying a.

Claims (15)

Receiving means for receiving a streaming video distribution request;
A video generation means for generating streaming video data in response to a distribution request;
Watermark generation means for generating a watermark including information capable of specifying the streaming video delivery requester;
Transmitting means for transmitting the streaming video data and the watermark so that the watermark is visibly displayed in the streaming video display screen when the streaming video data is reproduced and displayed; A video distribution server comprising: The receiving means receives login information of the delivery requester,
The moving image distribution server according to claim 1, wherein the watermark generation unit generates the watermark using the login information.   2. The moving image distribution server according to claim 1, wherein the watermark generation unit generates the watermark by encrypting information that can identify the distribution requester.   The moving image distribution server according to claim 2, wherein the watermark generation unit generates the watermark by encrypting viewing history information generated in association with login information of the distribution requester.   5. The moving image distribution server according to claim 4, wherein the watermark generation unit generates the watermark composed of an alphanumeric string of 4 to 6 characters by encrypting the viewing history information. The receiving means receives information indicating that a capture operation on the display screen has been detected,
The transmitting means, when information indicating that a capture operation has been detected is received by the receiving means, an e-mail containing information indicating that the capture operation has been detected, as a pre-registered administrator 6. The moving image distribution server according to claim 1, wherein the moving image distribution server is automatically transmitted to the e-mail address. Terminal-side receiving means for receiving streaming video data and a watermark transmitted from the video distribution server according to any one of claims 1 to 6,
A moving image comprising: display means for visually displaying the watermark in a streaming moving image display screen when the streaming moving image data received by the terminal-side receiving means is reproduced and displayed. Playback terminal.   8. The video playback terminal according to claim 7, wherein the display means displays a plurality of the watermarks in a display screen of the streaming video.   9. The moving image playback terminal according to claim 8, wherein the display means displays the plurality of watermarks by arranging them substantially uniformly over the entire area of the streaming video display screen.   The moving image playback terminal according to any one of claims 7 to 9, wherein the display means displays the watermark with a border character.   11. The display unit according to claim 7, wherein before the display of the streaming video is started, information indicating that a viewer can be specified is included in the watermark. The moving image playback terminal according to item 1. Detecting means for detecting a capture operation on the display screen;
The terminal-side transmission unit that automatically transmits information indicating that the capture operation has been detected to the video distribution server when a capture operation is detected by the detection unit. The moving image playback terminal according to any one of 7 to 11.   13. The display unit displays that, when a capture operation on the display screen is detected, the detection information of the capture operation is notified before the display of the streaming video is started. The video playback terminal described in 1. Terminal-side receiving means for receiving streaming video data transmitted from the video distribution server;
Detecting means for detecting a capture operation for a display screen of a streaming video when the streaming video data received by the terminal-side receiving unit is reproduced and displayed;
A video playback terminal comprising: terminal side transmission means for automatically transmitting information indicating that a capture operation has been detected to the video distribution server when a capture operation is detected by the detection means. . The video distribution server according to any one of claims 1 to 6,
A moving image viewing system comprising: the moving image reproducing terminal according to claim 7.

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