JP2012080354A - Detection device and detection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detection device and a detection method capable of reducing a workload when detecting illegal moving image content information.SOLUTION: The detection device for detecting the illegal moving image content information copied from first moving image content information provided by a content provider comprises: an acquisition part which acquires second moving image content information; a determination part which determines whether the acquired second moving image content information includes identification image information to identify the content provider; and a detection part that, when the determination part determines that the identification image information to identify the content provider is included, detects the second moving image content information as the illegal moving image content information. The identification image information is included in the first moving image content information and provided by the content provider, and displayed as identification image for identifying the content provider providing the first moving image content information when the first content information is displayed.

Description

  The present invention relates to a detection apparatus and a detection method for detecting illegal video content information obtained by copying video content information provided by a content provider.

  Conventionally, various video content information has been provided from content providers including broadcasters such as television stations. Since most of these video content information is displayed with a logo mark (identification image) that identifies the content provider when the video content information is displayed, the user can broadcast the video content information that is being viewed. Content providers such as business operators can be easily recognized.

  Incidentally, in recent years, with the spread of communication technologies such as the Internet, various video content information can be uploaded or downloaded with the development of data compression technologies.

  Such video content information includes a large amount of illegal video content information obtained by copying video content information that is copyrighted by a content provider. In view of this, a detection device that prevents such illegal moving image content information from spreading has been proposed, and one of them is a detection device that uses a fingerprint technology (see, for example, Patent Document 1).

  Below, the structure of the detection apparatus using fingerprint technology is demonstrated as an example. Such a detection apparatus obtains the space and time domain features of the image frame information for a predetermined period in the moving image content information provided by the content provider, and obtains the space and time domain features as the first fingerprint. On the other hand, such a detection device similarly obtains space and time domain features for moving image content information uploaded to the Internet or the like, and acquires the space and time domain features as a second fingerprint.

  Then, such a detection device compares the acquired first fingerprint and the second fingerprint, and if they are determined to be coincident or approximate values, the uploaded video content information is illegal. The video content information is detected.

  By using such a detection device, illegal video without comparing all the information included in the video content information provided by the content provider and all the information included in the uploaded video content information. Content information can be detected.

JP 2009-535920 A

  However, there is an enormous number of video content information uploaded to the Internet or the like. Furthermore, as for the moving image content information provided by the content provider, for example, different broadcast content information is transmitted every day by a broadcaster such as a television station.

  Therefore, when detecting illegal video content information, the conventional detection device calculates fingerprints one by one for the uploaded video content information and the video content information provided by the content provider. Since the process has to be executed, there is a problem that the work load is very large.

  Furthermore, in the conventional detection device, the fingerprint corresponding to the same scene, that is, the image frame information in the same period, must be compared between the moving image content information provided by the content provider and the uploaded moving image content information. In addition, there is a problem that the work load for specifying this period is large.

  Therefore, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a detection device and a detection method capable of reducing the workload when detecting illegal moving image content information.

  In order to solve the problems described above, the present invention has the following features. A first feature of the present invention is a detection device that detects illegal moving image content information obtained by copying first moving image content information (for example, broadcast content information) provided by a content provider (for example, broadcaster 2). Detection device 10), and an acquisition unit (video content acquisition unit 11) for acquiring second video content information (for example, uploaded video content information), and the acquired second video content information A determination unit (determination unit 14) for determining whether or not identification image information for identifying the content provider (for example, logo mark information of the broadcaster) is included; and the determination unit determines the content provider When it is determined that identification image information to be identified is included, the second moving image content information is referred to as the illegal moving image content information. The identification image information is provided by the content provider to be included in the first moving image content information and displays the first moving image content information. In this case, the content is displayed as an identification image for identifying the content provider that provides the first content information.

  According to this feature, the detection apparatus determines whether or not the identification image information for identifying the content provider is included in the second moving image content information, and determines that the identification image information is included. In such a case, the video content is detected as illegal video content information. Here, the identification image information is included in the first video content information and transmitted, and when the first video content information is displayed, the identification image for identifying the content provider that transmits the first video content information Is displayed. That is, the identification image information is originally included in the first video content information so that the user (viewer) can recognize the content provider of the first video content information being viewed when the user (viewer) views the first video content information. It is included information.

  Therefore, according to this detection apparatus, it is possible to detect illegal video content information obtained by copying the first video content information as long as the identification image information for identifying the content provider is acquired. Since the processing for generating the fingerprint is not required for each of the first moving image content information and the second moving image content information as in the apparatus, the workload can be reduced.

  Furthermore, in the conventional detection device, the fingerprints of the image frame information in the same period in the time axis direction have to be compared in the first moving image content information and the second moving image content information. Had to run. However, according to the detection apparatus according to the present invention, it is not necessary to specify a period in the time axis direction in the first moving image content information and the second moving image content information, and therefore it is possible to reduce the workload for executing these processes. .

  As described above, according to the detection device of the present invention, it is possible to reduce a work load when detecting illegal moving image content information.

  A second feature of the present invention relates to the above feature, wherein the second moving image content information includes a plurality of pieces of image frame information, and the determination unit includes the identification image information in a predetermined region of the image frame information. It is determined whether or not the predetermined region has the same position in each of the plurality of image frame information.

  According to such a feature, when determining whether or not identification image information is included for a plurality of pieces of image frame information, the detection device may determine by focusing on a predetermined region having the same position. The processing load can be reduced as compared with the case where all image information and identification image information in a frame are determined.

  A third feature of the present invention relates to any one of the first to second features of the present invention, wherein the second moving image content information includes a plurality of pieces of image frame information, and the detection unit includes the determination The second moving image content information is detected as the illegal moving image content information when it is determined by the unit that the identification image information is included in one of the plurality of image frame information. Is a summary.

  According to this feature, the detection device can detect illegal moving image content information without being based on the determination result of all the image frame information, so that the workload can be reduced.

  Furthermore, in the conventional detection device, the fingerprints of the image frame information in the same period in the time axis direction have to be compared in the first moving image content information and the second moving image content information. Had to run. According to the detection apparatus of the present invention, if it is determined whether or not identification image information is included in one image frame information, illegal moving picture content information can be detected regardless of the image frame information in the time axis direction. As a result, the workload can be reduced.

  A fourth feature of the present invention is a detection method for detecting illegal video content information obtained by copying first video content information provided by a content provider, and acquiring the second video content information (step) S2), a determination step (step S5) for determining whether or not the acquired second moving image content information includes identification image information for identifying the content provider, and the content in the determination step A detection step (step S6) for detecting the second video content information as the illegal video content information when it is determined that the identification image information for identifying the provider is included; , Provided by the content provider in the first video content information Together, when displaying the first video content information, it is an gist to be displayed as an identification image for identifying the content provider providing the first video content information.

  ADVANTAGE OF THE INVENTION According to this invention, the detection apparatus and detection method which can reduce the workload at the time of detecting illegal moving image content information can be provided.

FIG. 1 is a configuration diagram of a detection system according to an embodiment of the present invention. FIG. 2A is a diagram showing an example of a moving image content table according to the embodiment of the present invention. FIG. 2B is a diagram showing an example of the identification image table according to the embodiment of the present invention. FIG. 3A is a diagram showing an example of an identification image displaying identification image information according to the embodiment of the present invention. FIG. 3B is a diagram showing an example of an identification image when the identification image information according to the embodiment of the present invention is displayed. FIG. 4 is a configuration diagram of the detection apparatus according to the embodiment of the present invention. FIG. 5 is a diagram for explaining the image frame information in the moving image content information. FIG. 6 is a diagram for explaining a predetermined area in the reference image frame information. FIG. 7 is a flowchart for explaining the operation of the detection apparatus according to the embodiment of the present invention.

(First embodiment)
A first embodiment of a detection system and a detection apparatus according to the present invention will be described with reference to the drawings. Specifically, (1) the schematic configuration of the detection system, (2) the configuration of the detection device, (3) the operation of the detection device (4) actions and effects will be described. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic and only conceptually show portions related to the present invention.

(1) Schematic Configuration of Detection System A schematic configuration of the detection system according to the present embodiment will be described with reference to FIGS. The detection system according to the present embodiment is configured to detect illegal video content information obtained by copying video content information (first video content information) provided by a content provider. Here, in the present embodiment, the content provider is described as a broadcaster such as a television station. It should be noted that the content providers include various businesses that provide content information such as dramas, animations, sports, movies, and the like. In the present embodiment, the moving image content information provided by the content provider is described as broadcast content information broadcast from the broadcaster. Note that the moving image content information is not limited to broadcast content information, but includes moving image content information provided by various content providers.

  FIG. 1 shows the overall configuration of a detection system 1 according to this embodiment. As shown in FIG. 1, a detection system 1 according to this embodiment is connected to a broadcaster 2 and a network 3. The detection system 1 according to the present embodiment includes a moving image content database 5, an identification image database 6, and a detection device 10.

  The broadcaster 2 is a television station, a cable television (CATV) station, a satellite broadcasting station, or the like that transmits broadcast content information to the public using broadcast waves. The network 3 is assumed to be a communication network such as the Internet. The broadcast content information may be digital information or analog information.

  The moving image content database 5 is configured to acquire moving image content information from the content server 4 that stores moving image content information (second moving image content information) via the network, and to store the acquired moving image content information. Yes. Specifically, the moving image content database 5 has the moving image content table shown in FIG. 2A, and as shown in the moving image content table, the acquired moving image content information and the address information of the acquisition destination server. And the ID for identifying the moving image content information are stored in association with each other. The moving image content database 5 may be configured to acquire moving image content information via a storage medium such as a flash memory.

  Here, the address information may be any information as long as it is information that can specify the acquisition server, and may be, for example, an Internet URL. The moving image content information is assumed to be compressed information such as MPEG2 format, and includes a plurality of pieces of image frame information. Specifically, the moving image content information is predicted in the time axis direction as image frame information based on reference image frame information (I frame information) having image information in the entire region within the frame region and the reference image frame information. Prediction image frame information (B frame information and P frame information). In the above example, the moving image content information is exemplified as being compressed, but may be uncompressed information.

  The identification image database 6 is configured to acquire identification image information for identifying the broadcaster 2 from the broadcaster 2 and store the acquired identification image information. Specifically, the identification image database 6 has the identification image table shown in FIG. 2B, and as shown in the identification image table, the identification image information and the identification image ID for identifying the identification image information. Are stored in association with each other. The identification image database 6 may be configured to acquire identification image information from the broadcaster 2 via a network, or acquire moving image content information via a storage medium such as a flash memory. It may be configured as follows.

  Here, the identification image information is information included in the broadcast content information and transmitted by the broadcaster 2. The identification image information is displayed, for example, at the end of the display image of the broadcast content information as an identification image for identifying the broadcaster 2 that transmits the broadcast content information when the broadcast content information is displayed. In the present embodiment, the case where the identification image is fixed and displayed at the upper right position of the display image will be described as an example. The position where the identification image is displayed is not limited to this and may be any position.

  FIGS. 3A and 3B show an example of an identification image when the identification image information is displayed. As shown in FIGS. 3A to 3B, the identification image is a logo mark or the like for identifying the broadcaster, and may be a specific character image or the like. Thus, the identification image information is information originally included in the broadcast content information so that the user (viewer) can recognize the broadcaster of the broadcast content information being viewed.

  The detection device 10 is connected to the moving image content database 5 and the identification image database 6. The detection device 10 is configured to detect illegal moving image content information obtained by copying the broadcast content information transmitted by the broadcaster 2.

(2) Configuration of Detection Device The configuration of the detection device 10 according to the present embodiment will be described with reference to FIGS. As illustrated in FIG. 4, the detection apparatus 10 according to the present embodiment includes a moving image content acquisition unit 11, an identification image acquisition unit 12, an extraction unit 13, a determination unit 14, and a detection unit 15. Although the detection device 10 also has a semiconductor memory or the like, description thereof is omitted here.

  The video content acquisition unit 11 is connected to the video content database 5 and acquires video content information from the video content database 5.

  The identification image acquisition unit 12 is connected to the identification image database 6 and acquires identification image information and an identification image ID from the identification image database 6.

  The extraction unit 13 acquires the moving image content information and the content ID from the moving image content acquisition unit 11, and extracts reference image frame information from the acquired moving image content information. Specifically, as shown in FIG. 5, the extraction unit 13 includes image frame information such as reference image frame information (I frame information) and predicted image frame information (B and P frame information) included in the moving image content information. From this, reference image frame information is extracted.

  The determination unit 14 determines whether or not the acquired moving image content information includes identification image information for identifying the broadcaster 2. Specifically, the determination unit 14 acquires the reference image frame information extracted by the extraction unit 13 and the content ID corresponding to the reference image frame information, and identifies one or more pieces of identification image information from the identification image acquisition unit 12. Get the image ID. Further, the determination unit 14 determines whether the identification image information is included in a predetermined area of the acquired reference image frame information. Here, as shown in FIG. 6, the predetermined area is an area within frame coordinates (X1, Y1) and (X2, Y2) in the image frame information, and has a smaller area than the entire area of the image frame information. .

  The predetermined area Z has the same position in each of the plurality of pieces of image frame information. Further, in the present embodiment, since the identification image is displayed at the upper right position of the display image, as illustrated in FIG. 6, the case where the predetermined region Z is the upper right position of the image frame information will be described as an example. However, the predetermined area Z may be in any position as long as it includes the area of the identification image.

  The determination unit 14 stores frame coordinates (X1, Y1) and (X2, Y2) in advance, compares the image information of the predetermined region Z with the identification image information in the reference image frame information, and determines the degree of coincidence. The difference amount shown is calculated. Specifically, the determination unit 14 calculates the sum of the difference values between the pixel value of the pixel in the predetermined region Z of the reference image frame information and the pixel value of the pixel in the identification image information as a difference amount.

  Here, the area of the reference image frame information in the predetermined region Z is larger than the area of the image region of the identification image information. Therefore, when calculating the difference amount, the determination unit 14 moves the image area of the identification image information in units of pixels within the predetermined area Z of the reference image frame information, and the image area of the identification image information. The amount of difference in the overlapping area is calculated. Then, when the movement of the image area of the identification image information is completed in all areas within the predetermined area Z, the determination unit 14 specifies the smallest difference amount among all the calculated difference amounts as a determination result.

  The determination unit 14 stores a predetermined difference amount threshold, and determines whether the calculated difference amount is equal to or less than the threshold. When the difference amount is equal to or smaller than the threshold value, the determination unit 14 determines that the identification image information is included in the reference image frame information of the moving image content information, and notifies the detection unit 15 of the content ID corresponding to the moving image content information. To do.

  When the determination unit 14 determines that the identification image information for identifying the broadcaster 2 is included in the determination unit 14, the detection unit 15 detects the video content information as illegal video content information obtained by copying the broadcast content information. Specifically, the detection unit 15 acquires a content ID from the determination unit 14 and detects moving image content information corresponding to the acquired content ID as illegal moving image content information. Further, when the determination unit 14 determines that the identification image information is included in one reference image frame information among the plurality of reference image frame information, and the content ID is notified, the detection unit 15 Is detected as illegal video content information.

  The detection unit 15 may output the notified content ID to, for example, a notification device (not shown) for warning the server. In this case, when the notification device acquires the address information corresponding to the content ID from the video content database 5, it notifies the addressed server or the like that the uploaded video content information is illegal video content information. it can.

(3) Operation of Detection Device Hereinafter, the operation of the detection device 10 according to the present embodiment will be described with reference to FIG. FIG. 7 is a flowchart showing the operation of the detection apparatus 10 according to this embodiment.

As shown in FIG. 7, in step S <b> 1, the identification image acquisition unit 12 acquires identification image information and an identification image ID from the identification image database 6. At this time, the identification image acquisition unit 12 may acquire all the identification image information and the identification image ID stored in the identification image database 6.

  In step S <b> 2, the moving image content acquisition unit 11 acquires moving image content information from the moving image content database 5.

  In step S3, the extraction unit 13 acquires the video content information and the content ID from the video content acquisition unit 11, and extracts one or a plurality of reference image frame information from the acquired video content information.

  In step S <b> 4, the determination unit 14 acquires the reference image frame information extracted by the extraction unit 13 and the content ID, and acquires the identification image information and the identification image ID from the identification image acquisition unit 12. Further, the determination unit 14 calculates a difference amount between the image information of the predetermined region Z of the acquired reference image frame information and the identification image information.

  In step S5, the determination unit 14 determines whether or not the identification image information is included in the predetermined region Z of the image frame information. Specifically, the determination unit 14 determines whether or not the calculated difference amount is equal to or less than a predetermined threshold value. When the determination unit 14 acquires a plurality of pieces of identification image information from the identification image acquisition unit 12, whether the identification image information is included in the predetermined region Z of the image frame information based on each of the plurality of pieces of identification image information. It may be determined whether or not.

  In step S6, when the determination unit 14 determines that the difference amount is equal to or less than the threshold (in the case of “Yes” in step S5), the determination unit 14 determines that the identification image information is included in the reference image frame information of the moving image content information. Then, the detection unit 15 is notified of the content ID corresponding to the moving image content information. Note that when the determination unit 14 determines that the identification image information is included in one reference image frame information among the plurality of reference image frame information, that is, when the difference amount is equal to or less than the threshold value, the moving image content information Is notified to the detection unit 15 and the difference amount corresponding to the remaining reference image frame information is not determined.

  In addition, when the determination unit 14 determines that the identification image information is included in one image frame information, that is, when one content ID is acquired, the detection unit 15 has a moving image content corresponding to the content ID. Information is detected as illegal video content information.

  In step S <b> 7, when the determination unit 14 determines that the difference amount is not equal to or less than the threshold (“No” in step S <b> 5), the determination unit 14 determines that the identification image information is not included in the reference image frame information, and the detection unit 15. Do not notify anything. Therefore, the detection unit 15 does not detect the video content information as illegal video content information.

  In this way, the detection device 10 performs an operation of detecting illegal moving image content information. Note that either the operation of step S1 or the operation of step S2 may be executed first. Further, the detection apparatus 10 may repeatedly execute the operations in steps S2 to S7 for each of the plurality of pieces of video content information to determine whether the target video content information is illegal video content information. Good.

(4) Action / Effect In the detection device 10 according to the present embodiment, the determination unit 14 calculates the difference amount based on the reference image frame information and the identification image information of the moving image content information. Further, when the difference amount is equal to or smaller than the threshold, the determination unit 14 determines that the identification image information for identifying the broadcaster 2 is included in the moving image content information, and notifies the detection unit 15 of the content ID. Upon receiving this notification, the detection unit 15 detects the moving image content corresponding to the content ID as illegal moving image content information.

  Therefore, according to the detection device 10, illegal video content information can be detected as long as identification image information for identifying the broadcaster 2 is acquired. In addition, since it is not necessary to generate a fingerprint for each piece of moving image content information, the workload can be reduced.

  Furthermore, in the conventional detection device, since the fingerprints of the image frame information in the same period (same scene) must be compared in the time axis direction in the broadcast content information and the moving image content information, the process of specifying the same period Had to run. However, according to the detection apparatus 10 according to the present embodiment, the determination unit 14 determines whether or not the identification image information is included in the moving image content information, and the detection unit 15 determines the illegal moving image according to the determination result. Since the content information is detected, it is not necessary to specify image frame information for the same period in the time axis direction in the broadcast content information and the moving image content information, so that the workload for executing these processes can be reduced.

  In the detection device 10 according to the present embodiment, when the determination unit 14 determines whether or not the identification image information is included in the image frame information such as the reference image frame information, a plurality of pieces of reference image frame information The difference amount between the image of the predetermined region Z having the same position in each of the images and the image of the identification image information is calculated. Therefore, in the detection apparatus 10 according to the present embodiment, the difference amount may be calculated by paying attention to the predetermined region Z having the same position, and thus the difference amount between all the image information in the frame and the identification image information is calculated. Compared with the case where it does, work load can be reduced.

  Further, in the detection device 10 according to the present embodiment, when the determination unit 14 determines that the identification image information is included in one reference image frame information among the plurality of reference image frame information in the moving image content information, The detection unit 15 detects the video content information as illegal video content information. Therefore, the detection apparatus 10 according to the present embodiment can detect illegal video content information for all image frame information without determining whether or not the identification image information is included, and the workload Can be reduced.

  As described above, according to the detection apparatus 10 according to the present invention, it is possible to reduce the workload when detecting illegal moving image content information.

(Second Embodiment)
The second embodiment of the detection apparatus according to the present invention will be described below. In the present embodiment, except for the configurations of the determination unit 14 and the detection unit 15 in the detection apparatus 10, the other configurations are the same as those in the above-described embodiment.

  In the above-described embodiment, the detection device 10 is configured to detect the moving image content information as illegal moving image content information when it is determined that the identification image information is included in one reference image frame information. In this embodiment, when the number of determinations that the reference image frame information includes the identification image information is equal to or greater than a predetermined number, the detection apparatus 10 detects the video content information as illegal video content information.

  Specifically, when the determination unit 14 determines that the identification image information is included in one reference image frame information, the determination unit 14 counts the number of times. Subsequently, the determination unit 14 determines whether or not the identification image information is included in the other reference image frame information. That is, the determination unit 14 repeatedly executes the processes in steps S4 to S7. In addition, the determination unit 14 notifies the detection unit 15 of the content ID when the number of determinations that the identification image information is included in the reference image frame information is equal to or greater than a predetermined number.

  When the content ID is notified from the determination unit 14, the detection unit 15 detects the video content information as illegal video content information.

  Thus, according to the detection apparatus 10 according to the present embodiment, when the number of times that the identification image information is determined to be included in the reference image frame information is a predetermined number or more, the target video content information is illegal video content. Since it detects as information, compared with the case where illegal moving image content information is detected based on one determination result, the detection accuracy of illegal moving image content information can be improved.

(Other embodiments)
Although the contents of the present invention have been disclosed through the embodiments of the present invention as described above, it should not be understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, the detection apparatus 10 may be prepared as dedicated hardware. Moreover, you may implement | achieve as a software module performed by control parts, such as CPU. Therefore, the processing shown in FIG. 7 can be realized by operating the detection apparatus 10 with a program that executes the software module.

  In the above-described embodiment, the video content information obtained by copying the broadcast content information has been described as illegal video content information. However, the video content information may be video content information copied by a user who has the right to copy. is there. In other words, it should be noted that the above-described illegal moving image content information is not limited to illegal, and includes any moving image content information obtained by copying broadcast content information.

  In the above-described embodiment, the identification image of the identification image information for identifying the broadcaster has been described by taking a logo mark or the like as an example. However, the moving image content information obtained by copying the broadcast content information includes a lot of moving image content information that has been subjected to predetermined processing such as inversion processing. Therefore, the identification image information may be image information after processing in which predetermined processing such as inversion processing is performed on the identification image such as a logo mark.

  As described above, the present invention naturally includes various embodiments that are not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

  Z ... predetermined region, 1 ... detection system, 2 ... broadcaster, 3 ... network, 4 ... content server, 5 ... video content database, 6 ... identification image database, 10 ... detection device, 11 ... video content acquisition unit, 12 ... identification image acquisition unit, 13 ... extraction unit, 14 ... determination unit, 15 ... detection unit

Claims (4)

A detection device for detecting illegal video content information obtained by copying first video content information provided by a content provider,
An acquisition unit for acquiring second video content information;
A determination unit for determining whether or not the acquired second moving image content information includes identification image information for identifying the content provider;
A detection unit that detects the second video content information as the illegal video content information when the determination unit determines that the identification image information for identifying the content provider is included;
The content that provides the first content information when the first video content information is displayed while the identification image information is provided by being included in the first video content information by the content provider. A detection device displayed as an identification image for identifying a provider. The second moving image content information includes a plurality of image frame information,
The determination unit determines whether the identification image information is included in a predetermined region of the image frame information;
The detection apparatus according to claim 1, wherein the predetermined region has the same position in each of the plurality of pieces of image frame information. The second moving image content information includes a plurality of image frame information,
When the determination unit determines that the identification image information is included in one image frame information among the plurality of image frame information, the detection unit converts the second moving image content information to the illegal The detection device according to claim 1, wherein the detection device is detected as moving image content information. A detection method for detecting illegal video content information obtained by copying first video content information provided by a content provider,
An acquisition step of acquiring second video content information;
A determination step of determining whether or not the acquired second moving image content information includes identification image information for identifying the content provider;
A detection step of detecting the second video content information as the illegal video content information when it is determined that the identification image information for identifying the content provider is included in the determination step;
The identification image information is provided by being included in the first video content information by the content provider, and provides the first video content information when the first video content information is displayed. A detection method characterized by being displayed as an identification image for identifying a content provider.

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