JP7398222B2 - Program, information processing device, and information processing method - Google Patents

Description

The present disclosure relates to a program, an information processing device, and an information processing method.

Patent Document 1 discloses a content data reproducing device that can determine that, when specific content data distributed by streaming is copied, the copied content data is fraudulent.

JP2014-89638A

There is room for improvement in the method for determining whether copied content data is fraudulent.

An object of the present disclosure is to provide a program, an information processing device, and an information processing method that can easily determine whether 360-degree content being reproduced has been illegally copied.

According to one aspect of the present disclosure,
obtaining 360-degree content with embedded watermark information;
A program for causing a computer to execute a step of reproducing the 360-degree content with the watermark information canceled,
A program is provided in which the watermark information is obtained by reversibly converting at least part of information of the 360-degree content.

Further, according to one aspect of the present disclosure,
acquiring 360 degree content;
embedding watermark information in the 360 degree content;
A program for causing a computer to execute the step of distributing the 360-degree content,
A program is provided in which the watermark information is obtained by reversibly converting at least part of information of the 360-degree content.

According to the present disclosure, it is possible to easily determine whether the 360-degree content being played back has been illegally copied.

1 is a diagram schematically showing the configuration of an HMD system according to an embodiment. 1 is a block diagram illustrating an example of a hardware configuration of a computer according to an embodiment. FIG. FIG. 2 is a diagram conceptually representing a UVW visual field coordinate system set in an HMD according to an embodiment. FIG. 2 is a diagram conceptually representing one aspect of representing a virtual space according to an embodiment. FIG. 2 is a top view of a user's head wearing an HMD according to an embodiment. FIG. 3 is a diagram showing a YZ cross section of a viewing area viewed from the X direction in virtual space. FIG. 3 is a diagram showing an XZ cross section of a viewing area viewed from the Y direction in virtual space. FIG. 1 is a diagram showing a schematic configuration of a controller according to an embodiment. FIG. 3 is a diagram illustrating an example of yaw, roll, and pitch directions defined for a user's right hand according to an embodiment. FIG. 2 is a block diagram illustrating an example of the hardware configuration of a server according to an embodiment. 1 is a block diagram illustrating a computer as a modular configuration according to an embodiment; FIG. It is a sequence chart showing a part of processing performed in an HMD set according to a certain embodiment. FIG. 2 is a schematic diagram showing a situation in which each HMD provides a virtual space to a user in a network. It is a figure which shows the visual field image of user 5A in FIG. 12(A). It is a sequence chart which shows the process performed in the HMD system according to a certain embodiment. It is a sequence chart showing the flow of distribution processing of 360-degree content. FIG. 2 is a diagram illustrating an example of 360-degree content distributed to a user. FIG. 2 is a schematic diagram for explaining a process of embedding watermark information in 360-degree content. FIG. 2 is a diagram illustrating an example of 360-degree content distributed to a user. FIG. 2 is a diagram illustrating an example of 360-degree content distributed to a user. FIG. 3 is a schematic diagram for explaining a process of canceling watermark information embedded in 360-degree content. FIG. 6 is a diagram illustrating a state in which watermark information is offset from a reference position and embedded in 360-degree content.

Hereinafter, embodiments of this technical idea will be described in detail with reference to the drawings. In the following description, the same parts are given the same reference numerals. Their names and functions are also the same. Therefore, detailed descriptions thereof will not be repeated. In one or more embodiments shown in this disclosure, elements included in each embodiment can be combined with each other, and the resultant product of the combination also forms part of the embodiments shown in this disclosure.

[HMD system configuration]
The configuration of an HMD (Head-Mounted Device) system 100 will be described with reference to FIG. 1. FIG. 1 is a diagram schematically showing the configuration of an HMD system 100 according to this embodiment. The HMD system 100 is provided as a home-use system or a business-use system.

The HMD system 100 includes a server 600, HMD sets 110A, 110B, 110C, and 110D, an external device 700, and a network 2. Each of HMD sets 110A, 110B, 110C, and 110D is configured to be able to communicate with server 600 and external device 700 via network 2. Hereinafter, the HMD sets 110A, 110B, 110C, and 110D are also collectively referred to as the HMD set 110. The number of HMD sets 110 that constitute the HMD system 100 is not limited to four, and may be three or less or five or more. The HMD set 110 includes an HMD 120, a computer 200, an HMD sensor 410, a display 430, and a controller 300. HMD 120 includes a monitor 130, a gaze sensor 140, a first camera 150, a second camera 160, a microphone 170, and a speaker 180. Controller 300 may include a motion sensor 420.

In one aspect, the computer 200 can be connected to the Internet or other network 2 and can communicate with the server 600 or other computers connected to the network 2. Examples of other computers include computers of other HMD sets 110 and external equipment 700. In another aspect, HMD 120 may include sensor 190 instead of HMD sensor 410.

HMD 120 is attached to the head of user 5 and can provide virtual space to user 5 during operation. More specifically, HMD 120 displays a right-eye image and a left-eye image on monitor 130, respectively. When each eye of the user 5 visually recognizes each image, the user 5 can recognize the image as a three-dimensional image based on the parallax between the eyes. HMD 120 may include either a so-called head-mounted display including a monitor, or a head-mounted device to which a smartphone or other terminal having a monitor can be attached.

The monitor 130 is realized, for example, as a non-transmissive display device. In one aspect, the monitor 130 is arranged on the main body of the HMD 120 so as to be located in front of both eyes of the user 5. Therefore, when the user 5 views the three-dimensional image displayed on the monitor 130, he or she can immerse himself in the virtual space. In one aspect, the virtual space includes, for example, a background, objects that can be operated by the user 5, and images of menus that can be selected by the user 5. In one aspect, the monitor 130 can be implemented as a liquid crystal monitor or an organic EL (Electro Luminescence) monitor included in a so-called smartphone or other information display terminal.

In another aspect, monitor 130 may be implemented as a transmissive display device. In this case, the HMD 120 may not be a closed type that covers the eyes of the user 5 as shown in FIG. 1, but may be an open type such as a pair of glasses. The transmissive monitor 130 may be temporarily configured as a non-transmissive display device by adjusting its transmittance. The monitor 130 may include a configuration that simultaneously displays a portion of the image forming the virtual space and the real space. For example, the monitor 130 may display an image of the real space taken with a camera mounted on the HMD 120, or may make the real space visible by setting the transmittance of a part to be high.

In one aspect, monitor 130 may include a sub-monitor for displaying an image for the right eye and a sub-monitor for displaying an image for the left eye. In another aspect, the monitor 130 may be configured to integrally display the right eye image and the left eye image. In this case, monitor 130 includes a high speed shutter. The high-speed shutter operates so that images for the right eye and images for the left eye can be alternately displayed so that the images are only perceived by one eye.

In one aspect, HMD 120 includes a plurality of light sources (not shown). Each light source is realized by, for example, an LED (Light Emitting Diode) that emits infrared rays. HMD sensor 410 has a position tracking function for detecting movement of HMD 120. More specifically, HMD sensor 410 reads a plurality of infrared rays emitted by HMD 120 and detects the position and tilt of HMD 120 in real space.

In another aspect, HMD sensor 410 may be realized by a camera. In this case, the HMD sensor 410 can detect the position and tilt of the HMD 120 by performing image analysis processing using the image information of the HMD 120 output from the camera.

In another aspect, HMD 120 may include sensor 190 as a position detector instead of or in addition to HMD sensor 410. HMD 120 can use sensor 190 to detect the position and tilt of HMD 120 itself. For example, when the sensor 190 is an angular velocity sensor, a geomagnetic sensor, or an acceleration sensor, the HMD 120 can detect its own position and inclination using any of these sensors instead of the HMD sensor 410. As an example, when the sensor 190 is an angular velocity sensor, the angular velocity sensor detects the angular velocity around three axes of the HMD 120 in real space over time. The HMD 120 calculates temporal changes in the angle of the HMD 120 around the three axes based on each angular velocity, and further calculates the inclination of the HMD 120 based on the temporal changes in the angle.

Gaze sensor 140 detects the direction in which the right and left eyes of user 5 are directed. That is, the gaze sensor 140 detects the user's 5 line of sight. Detection of the direction of the line of sight is realized, for example, by a known eye tracking function. The gaze sensor 140 is realized by a sensor having the eye tracking function. In one aspect, gaze sensor 140 preferably includes a right eye sensor and a left eye sensor. The gaze sensor 140 may be, for example, a sensor that irradiates the right and left eyes of the user 5 with infrared light and detects the rotation angle of each eyeball by receiving reflected light from the cornea and iris of the irradiated light. . The gaze sensor 140 can detect the user's 5 line of sight based on each detected rotation angle.

The first camera 150 photographs the lower part of the user's 5 face. More specifically, the first camera 150 photographs the nose, mouth, etc. of the user 5. The second camera 160 photographs the eyes, eyebrows, etc. of the user 5. The housing on the user 5 side of the HMD 120 is defined as the inside of the HMD 120, and the housing on the opposite side of the HMD 120 from the user 5 is defined as the outside of the HMD 120. In one aspect, first camera 150 may be placed outside HMD 120, and second camera 160 may be placed inside HMD 120. Images generated by the first camera 150 and the second camera 160 are input to the computer 200. In another aspect, the first camera 150 and the second camera 160 may be implemented as one camera, and the face of the user 5 may be photographed with this one camera.

The microphone 170 converts the speech of the user 5 into an audio signal (electrical signal) and outputs it to the computer 200. The speaker 180 converts the audio signal into audio and outputs it to the user 5. In another aspect, HMD 120 may include earphones instead of speaker 180.

Controller 300 is connected to computer 200 by wire or wirelessly. Controller 300 accepts command input from user 5 to computer 200 . In one aspect, the controller 300 is configured to be graspable by the user 5. In another aspect, the controller 300 is configured to be attachable to the body or part of clothing of the user 5. In yet another aspect, the controller 300 may be configured to output at least one of vibration, sound, and light based on a signal transmitted from the computer 200. In yet another aspect, the controller 300 receives an operation from the user 5 for controlling the position and movement of an object placed in the virtual space.

In some aspects, controller 300 includes multiple light sources. Each light source is realized by, for example, an LED that emits infrared rays. HMD sensor 410 has a position tracking function. In this case, the HMD sensor 410 reads a plurality of infrared rays emitted by the controller 300 and detects the position and tilt of the controller 300 in real space. In another aspect, HMD sensor 410 may be realized by a camera. In this case, the HMD sensor 410 can detect the position and tilt of the controller 300 by executing image analysis processing using image information of the controller 300 output from the camera.

In a certain aspect, motion sensor 420 is attached to the user's 5 hand and detects the movement of the user's 5 hand. For example, the motion sensor 420 detects the rotation speed, number of rotations, etc. of the hand. The detected signal is sent to computer 200. Motion sensor 420 is provided in controller 300, for example. In one aspect, the motion sensor 420 is provided, for example, in the controller 300 that is configured to be graspable by the user 5. In another aspect, for safety in real space, the controller 300 is attached to the hand of the user 5, such as a glove, so that it does not easily fly away. In yet another aspect, a sensor that is not attached to the user 5 may detect the movement of the user's 5 hand. For example, a signal from a camera photographing the user 5 may be input to the computer 200 as a signal representing the user's 5 action. The motion sensor 420 and the computer 200 are, for example, connected to each other wirelessly. In the case of wireless communication, the communication form is not particularly limited, and for example, Bluetooth (registered trademark) or other known communication methods may be used.

Display 430 displays an image similar to the image displayed on monitor 130. This allows users other than the user 5 wearing the HMD 120 to view the same images as the user 5. The image displayed on the display 430 does not need to be a three-dimensional image, and may be an image for the right eye or an image for the left eye. Examples of the display 430 include a liquid crystal display and an organic EL monitor.

Server 600 may send programs to computer 200. In another aspect, server 600 may communicate with other computers 200 to provide virtual reality to HMDs 120 used by other users. For example, when multiple users play a participatory game at an amusement facility, each computer 200 communicates signals based on the actions of each user with the other computers 200 via the server 600, so that multiple users can play a participatory game in the same virtual space. allows users to enjoy common games. Each computer 200 may communicate signals based on the actions of each user with other computers 200 without going through the server 600.

The external device 700 may be any device that can communicate with the computer 200. The external device 700 may be, for example, a device that can communicate with the computer 200 via the network 2, or a device that can directly communicate with the computer 200 through short-range wireless communication or a wired connection. Examples of the external device 700 include, but are not limited to, a smart device, a PC (Personal Computer), and peripheral devices of the computer 200.

[Computer hardware configuration]
Referring to FIG. 2, computer 200 according to this embodiment will be described. FIG. 2 is a block diagram showing an example of the hardware configuration of computer 200 according to this embodiment. Computer 200 includes a processor 210, memory 220, storage 230, input/output interface 240, and communication interface 250 as main components. Each component is connected to a bus 260, respectively.

Processor 210 executes a series of instructions included in a program stored in memory 220 or storage 230 based on a signal given to computer 200 or based on the satisfaction of a predetermined condition. In one aspect, the processor 210 is implemented as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), an MPU (Micro Processor Unit), an FPGA (Field-Programmable Gate Array), or other device.

Memory 220 temporarily stores programs and data. The program is loaded from storage 230, for example. The data includes data input to computer 200 and data generated by processor 210. In one aspect, memory 220 is implemented as RAM (Random Access Memory) or other volatile memory.

Storage 230 permanently holds programs and data. The storage 230 is implemented as, for example, a ROM (Read-Only Memory), a hard disk device, a flash memory, or other nonvolatile storage device. The programs stored in the storage 230 include a program for providing a virtual space in the HMD system 100, a simulation program, a game program, a user authentication program, and a program for realizing communication with other computers 200. The data stored in the storage 230 includes data and objects for defining a virtual space.

In another aspect, storage 230 may be realized as a removable storage device such as a memory card. In yet another aspect, a configuration may be used in which programs and data stored in an external storage device are used instead of the storage 230 built into the computer 200. According to such a configuration, for example, in a scene where a plurality of HMD systems 100 are used, such as in an amusement facility, it becomes possible to update programs and data all at once.

Input/output interface 240 communicates signals between HMD 120, HMD sensor 410, motion sensor 420, and display 430. The monitor 130, gaze sensor 140, first camera 150, second camera 160, microphone 170, and speaker 180 included in the HMD 120 can communicate with the computer 200 via the input/output interface 240 of the HMD 120. In one aspect, the input/output interface 240 is realized using a USB (Universal Serial Bus), DVI (Digital Visual Interface), HDMI (registered trademark) (High-Definition Multimedia Interface), or other terminals. The input/output interface 240 is not limited to those described above.

In some aspects, input/output interface 240 may further communicate with controller 300. For example, input/output interface 240 receives input signals output from controller 300 and motion sensor 420. In another aspect, input/output interface 240 sends instructions output from processor 210 to controller 300. The command instructs the controller 300 to perform vibration, audio output, light emission, etc. Upon receiving the command, the controller 300 performs vibration, audio output, or light emission in accordance with the command.

Communication interface 250 is connected to network 2 and communicates with other computers (eg, server 600) connected to network 2. In one aspect, the communication interface 250 is realized as, for example, a LAN (Local Area Network) or other wired communication interface, or a WiFi (Wireless Fidelity), Bluetooth (registered trademark), NFC (Near Field Communication) or other wireless communication interface. be done. Communication interface 250 is not limited to those described above.

In some aspects, processor 210 accesses storage 230, loads one or more programs stored in storage 230 into memory 220, and executes a series of instructions contained in the programs. The one or more programs may include the operating system of the computer 200, an application program for providing a virtual space, game software executable in the virtual space, and the like. Processor 210 sends a signal for providing a virtual space to HMD 120 via input/output interface 240. HMD 120 displays video on monitor 130 based on the signal.

In the example shown in FIG. 2, a configuration is shown in which the computer 200 is provided outside the HMD 120, but in another aspect, the computer 200 may be built into the HMD 120. As an example, a portable information communication terminal (for example, a smartphone) including the monitor 130 may function as the computer 200.

The computer 200 may have a configuration that is commonly used by a plurality of HMDs 120. According to such a configuration, for example, the same virtual space can be provided to a plurality of users, so each user can enjoy the same application as other users in the same virtual space.

In one embodiment, in the HMD system 100, a real coordinate system that is a coordinate system in real space is set in advance. The real coordinate system has three reference directions (axes) that are parallel to a vertical direction in real space, a horizontal direction perpendicular to the vertical direction, and a front-back direction perpendicular to both the vertical direction and the horizontal direction. The horizontal direction, vertical direction (vertical direction), and longitudinal direction in the real coordinate system are defined as the x-axis, y-axis, and z-axis, respectively. More specifically, in the real coordinate system, the x-axis is parallel to the horizontal direction of real space. The y-axis is parallel to the vertical direction of real space. The z-axis is parallel to the front-back direction of real space.

In some aspects, HMD sensor 410 includes an infrared sensor. When the infrared sensor detects each infrared ray emitted from each light source of HMD 120, the presence of HMD 120 is detected. The HMD sensor 410 further detects the position and inclination (orientation) of the HMD 120 in the real space according to the movement of the user 5 wearing the HMD 120 based on the value of each point (each coordinate value in the real coordinate system). do. More specifically, HMD sensor 410 can detect temporal changes in the position and tilt of HMD 120 using each value detected over time.

Each inclination of HMD 120 detected by HMD sensor 410 corresponds to each inclination of HMD 120 around three axes in the real coordinate system. The HMD sensor 410 sets the uvw visual field coordinate system to the HMD 120 based on the inclination of the HMD 120 in the real coordinate system. The uvw visual field coordinate system set in the HMD 120 corresponds to the viewpoint coordinate system when the user 5 wearing the HMD 120 views an object in the virtual space.

[uvw visual field coordinate system]
The uvw visual field coordinate system will be described with reference to FIG. 3. FIG. 3 is a diagram conceptually representing a UVW visual field coordinate system set in HMD 120 according to an embodiment. HMD sensor 410 detects the position and tilt of HMD 120 in the real coordinate system when HMD 120 is activated. Processor 210 sets the uvw visual field coordinate system in HMD 120 based on the detected value.

As shown in FIG. 3, the HMD 120 sets a three-dimensional UVW visual field coordinate system centered on the head of the user 5 wearing the HMD 120 (origin). More specifically, HMD 120 changes the horizontal direction, vertical direction, and front-back direction (x-axis, y-axis, z-axis) that define the real coordinate system by the inclination around each axis of HMD 120 within the real coordinate system. The three directions newly obtained by tilting around the respective axes are set as the pitch axis (u axis), yaw axis (v axis), and roll axis (w axis) of the uvw visual field coordinate system in HMD 120.

In a certain situation, when the user 5 wearing the HMD 120 is standing upright and viewing the front, the processor 210 sets the uvw visual field coordinate system parallel to the real coordinate system on the HMD 120. In this case, the horizontal direction (x-axis), vertical direction (y-axis), and longitudinal direction (z-axis) in the real coordinate system are the pitch axis (u-axis) and yaw axis (v-axis) of the uvw visual field coordinate system in HMD 120. , and coincides with the roll axis (w axis).

After the uvw visual field coordinate system is set on the HMD 120, the HMD sensor 410 can detect the tilt of the HMD 120 in the set uvw visual field coordinate system based on the movement of the HMD 120. In this case, the HMD sensor 410 detects the pitch angle (θu), yaw angle (θv), and roll angle (θw) of the HMD 120 in the uvw visual field coordinate system as the inclination of the HMD 120, respectively. The pitch angle (θu) represents the tilt angle of the HMD 120 around the pitch axis in the uvw visual field coordinate system. The yaw angle (θv) represents the tilt angle of the HMD 120 around the yaw axis in the uvw visual field coordinate system. The roll angle (θw) represents the tilt angle of the HMD 120 around the roll axis in the uvw visual field coordinate system.

The HMD sensor 410 sets the uvw visual field coordinate system in the HMD 120 after the HMD 120 has moved based on the detected inclination of the HMD 120. The relationship between HMD 120 and the uvw visual field coordinate system of HMD 120 is always constant regardless of the position and inclination of HMD 120. When the position and inclination of HMD 120 change, the position and inclination of the uvw visual field coordinate system of HMD 120 in the real coordinate system change in conjunction with the change in the position and inclination.

In one aspect, the HMD sensor 410 detects the HMD 120 based on the infrared light intensity obtained based on the output from the infrared sensor and the relative positional relationship between a plurality of points (for example, the distance between each point). The position in real space may be specified as a relative position with respect to the HMD sensor 410. The processor 210 may determine the origin of the uvw visual field coordinate system of the HMD 120 in real space (real coordinate system) based on the specified relative position.

[Virtual space]
The virtual space will be further explained with reference to FIG. 4. FIG. 4 is a diagram conceptually representing one aspect of representing the virtual space 11 according to an embodiment. The virtual space 11 has a spherical structure that covers the entire 360 degree direction of the center 12. In FIG. 4, the celestial sphere in the upper half of the virtual space 11 is illustrated in order not to complicate the explanation. In the virtual space 11, each mesh is defined. The position of each mesh is predefined as a coordinate value in an XYZ coordinate system, which is a global coordinate system defined in the virtual space 11. The computer 200 associates each partial image forming the panoramic image 13 (still image, moving image, etc.) that can be developed in the virtual space 11 with each corresponding mesh in the virtual space 11 .

In one aspect, in the virtual space 11, an XYZ coordinate system with the center 12 as the origin is defined. For example, the XYZ coordinate system is parallel to the real coordinate system. The horizontal direction, vertical direction (vertical direction), and front-back direction in the XYZ coordinate system are defined as the X-axis, Y-axis, and Z-axis, respectively. Therefore, the X-axis (horizontal direction) of the XYZ coordinate system is parallel to the x-axis of the real coordinate system, the Y-axis (vertical direction) of the XYZ coordinate system is parallel to the y-axis of the real coordinate system, and the The Z-axis (front-back direction) is parallel to the z-axis of the real coordinate system.

When the HMD 120 is activated, that is, in the initial state of the HMD 120, the virtual camera 14 is placed at the center 12 of the virtual space 11. In one aspect, processor 210 displays an image captured by virtual camera 14 on monitor 130 of HMD 120. The virtual camera 14 similarly moves in the virtual space 11 in conjunction with the movement of the HMD 120 in the real space. Thereby, changes in the position and inclination of HMD 120 in real space can be similarly reproduced in virtual space 11.

As in the case of the HMD 120, the uvw visual field coordinate system is defined for the virtual camera 14. The UVW visual field coordinate system of the virtual camera 14 in the virtual space 11 is defined to be linked to the UVW visual field coordinate system of the HMD 120 in the real space (real coordinate system). Therefore, when the tilt of HMD 120 changes, the tilt of virtual camera 14 also changes accordingly. The virtual camera 14 can also move in the virtual space 11 in conjunction with the movement of the user 5 wearing the HMD 120 in the real space.

The processor 210 of the computer 200 defines the viewing area 15 in the virtual space 11 based on the position and inclination (reference line of sight 16) of the virtual camera 14. The viewing area 15 corresponds to an area of the virtual space 11 that is visible to the user 5 wearing the HMD 120 . In other words, the position of the virtual camera 14 can be said to be the viewpoint of the user 5 in the virtual space 11.

The line of sight of the user 5 detected by the gaze sensor 140 is the direction in the viewpoint coordinate system when the user 5 visually recognizes an object. The uvw visual field coordinate system of the HMD 120 is equal to the viewpoint coordinate system when the user 5 views the monitor 130 . The uvw visual field coordinate system of the virtual camera 14 is linked to the uvw visual field coordinate system of the HMD 120. Therefore, the HMD system 100 according to a certain aspect can consider the line of sight of the user 5 detected by the gaze sensor 140 as the line of sight of the user 5 in the uvw visual field coordinate system of the virtual camera 14.

[User's line of sight]
Determination of the line of sight of the user 5 will be described with reference to FIG. 5 . FIG. 5 is a top view of the head of user 5 wearing HMD 120 according to an embodiment.

In one aspect, the gaze sensor 140 detects each line of sight of the user's 5 right eye and left eye. In a certain situation, when the user 5 is looking nearby, the gaze sensor 140 detects the lines of sight R1 and L1. In another aspect, when the user 5 is looking far away, the gaze sensor 140 detects the lines of sight R2 and L2. In this case, the angle that the lines of sight R2 and L2 make with the roll axis w is smaller than the angle that the lines of sight R1 and L1 make with the roll axis w. Gaze sensor 140 transmits detection results to computer 200.

When the computer 200 receives the detected values of the line of sight R1 and L1 from the gaze sensor 140 as the detection result of the line of sight, it specifies the point of gaze N1, which is the intersection of the line of sight R1 and L1, based on the detected values. On the other hand, when the computer 200 receives the detected values of the lines of sight R2 and L2 from the gaze sensor 140, it specifies the intersection of the lines of sight R2 and L2 as the point of gaze. The computer 200 specifies the line of sight N0 of the user 5 based on the position of the specified gaze point N1. The computer 200 detects, for example, the direction in which a straight line passing through the midpoint of the straight line connecting the right eye R and the left eye L of the user 5 and the gaze point N1 is the line of sight N0. The line of sight N0 is the direction in which the user 5 is actually directing his/her line of sight with both eyes. The line of sight N0 corresponds to the direction in which the user 5 is actually directing his or her line of sight with respect to the viewing area 15.

In another aspect, HMD system 100 may include a television broadcast reception tuner. According to such a configuration, the HMD system 100 can display television programs in the virtual space 11.

In yet another aspect, the HMD system 100 may include a communication circuit for connecting to the Internet or a calling function for connecting to a telephone line.

[Visibility area]
The viewing area 15 will be described with reference to FIGS. 6 and 7. FIG. 6 is a diagram showing a YZ cross section of the viewing area 15 viewed from the X direction in the virtual space 11. FIG. 7 is a diagram showing an XZ cross section of the viewing area 15 viewed from the Y direction in the virtual space 11.

As shown in FIG. 6, the viewing area 15 in the YZ cross section includes a region 18. The region 18 is defined by the position of the virtual camera 14, the reference line of sight 16, and the YZ cross section of the virtual space 11. The processor 210 defines a range including the polar angle α centered on the reference line of sight 16 in the virtual space as the region 18 .

As shown in FIG. 7, the viewing area 15 in the XZ cross section includes a region 19. The region 19 is defined by the position of the virtual camera 14, the reference line of sight 16, and the XZ cross section of the virtual space 11. The processor 210 defines a range including the azimuth angle β centered on the reference line of sight 16 in the virtual space 11 as a region 19 . The polar angles α and β are determined depending on the position of the virtual camera 14 and the inclination (orientation) of the virtual camera 14.

In one aspect, the HMD system 100 provides the user 5 with a view in the virtual space 11 by displaying the view image 17 on the monitor 130 based on a signal from the computer 200. The visibility image 17 is an image corresponding to a portion of the panoramic image 13 that corresponds to the visibility area 15. When the user 5 moves the HMD 120 worn on the head, the virtual camera 14 also moves in conjunction with the movement. As a result, the position of the viewing area 15 in the virtual space 11 changes. Thereby, the visual field image 17 displayed on the monitor 130 is updated to an image of the panoramic image 13 that is superimposed on the visual field 15 in the direction toward which the user 5 faces in the virtual space 11 . The user 5 can visually recognize a desired direction in the virtual space 11.

In this way, the inclination of the virtual camera 14 corresponds to the line of sight (reference line of sight 16) of the user 5 in the virtual space 11, and the position where the virtual camera 14 is placed corresponds to the viewpoint of the user 5 in the virtual space 11. Therefore, by changing the position or inclination of the virtual camera 14, the image displayed on the monitor 130 is updated and the field of view of the user 5 is moved.

While wearing the HMD 120, the user 5 can view only the panoramic image 13 developed in the virtual space 11 without viewing the real world. Therefore, the HMD system 100 can provide the user 5 with a highly immersive feeling in the virtual space 11.

In one aspect, the processor 210 may move the virtual camera 14 in the virtual space 11 in conjunction with the movement of the user 5 wearing the HMD 120 in the real space. In this case, the processor 210 specifies the image area (visual area 15) to be projected on the monitor 130 of the HMD 120 based on the position and tilt of the virtual camera 14 in the virtual space 11.

In some aspects, virtual camera 14 may include two virtual cameras: a virtual camera for providing images for the right eye and a virtual camera for providing images for the left eye. Appropriate parallax is set for the two virtual cameras so that the user 5 can recognize the three-dimensional virtual space 11. In another aspect, the virtual camera 14 may be realized by one virtual camera. In this case, an image for the right eye and an image for the left eye may be generated from an image obtained by one virtual camera. In this embodiment, the virtual camera 14 includes two virtual cameras, and the roll axis (w) generated by combining the roll axes of the two virtual cameras is adapted to the roll axis (w) of the HMD 120. The technical idea according to the present disclosure will be exemplified as being configured so as to.

[controller]
An example of the controller 300 will be described with reference to FIG. 8. FIG. 8 is a diagram showing a schematic configuration of a controller 300 according to an embodiment.

As shown in FIG. 8, in one aspect, the controller 300 may include a right controller 300R and a left controller (not shown). The right controller 300R is operated by the user 5's right hand. The left controller is operated with the user's 5 left hand. In one aspect, the right controller 300R and the left controller are symmetrically configured as separate devices. Therefore, the user 5 can freely move the right hand holding the right controller 300R and the left hand holding the left controller. In another aspect, controller 300 may be an integrated controller that accepts operation with both hands. The right controller 300R will be explained below.

The right controller 300R includes a grip 310, a frame 320, and a top surface 330. The grip 310 is configured to be held by the user's 5 right hand. For example, the grip 310 may be held by the palm and three fingers (middle finger, ring finger, little finger) of the user 5's right hand.

Grip 310 includes buttons 340 and 350 and a motion sensor 420. The button 340 is arranged on the side surface of the grip 310 and accepts operation by the middle finger of the right hand. Button 350 is arranged on the front surface of grip 310 and accepts operation by the index finger of the right hand. In some aspects, buttons 340, 350 are configured as trigger-type buttons. Motion sensor 420 is built into the housing of grip 310. If the motion of the user 5 can be detected from around the user 5 by a camera or other device, the grip 310 may not include the motion sensor 420.

Frame 320 includes a plurality of infrared LEDs 360 arranged along its circumferential direction. The infrared LED 360 emits infrared rays while a program using the controller 300 is being executed in accordance with the progress of the program. The infrared rays emitted from the infrared LED 360 can be used to detect the respective positions and postures (tilt, orientation) of the right controller 300R and the left controller. Although the example shown in FIG. 8 shows infrared LEDs 360 arranged in two rows, the number of arrangements is not limited to that shown in FIG. 8. A single row or an array of three or more rows may be used.

The top surface 330 includes buttons 370 and 380 and an analog stick 390. Buttons 370, 380 are configured as push buttons. The buttons 370 and 380 accept operations by the thumb of the user's 5 right hand. In a certain situation, the analog stick 390 accepts operation in any direction of 360 degrees from the initial position (neutral position). The operation includes, for example, an operation for moving an object placed in the virtual space 11.

In one aspect, the right controller 300R and the left controller include batteries for driving the infrared LEDs 360 and other components. Batteries include, but are not limited to, rechargeable types, button types, dry battery types, and the like. In another aspect, the right controller 300R and the left controller may be connected to a USB interface of the computer 200, for example. In this case, the right controller 300R and the left controller do not require batteries.

As shown in states (A) and (B) of FIG. 8, for example, the yaw, roll, and pitch directions are defined for the right hand of the user 5. When user 5 extends his thumb and index finger, the direction in which the thumb extends is the yaw direction, the direction in which the index finger extends is the roll direction, and the direction perpendicular to the plane defined by the yaw axis and the roll axis is the pitch direction. It is defined as.

[Server hardware configuration]
With reference to FIG. 9, server 600 according to this embodiment will be described. FIG. 9 is a block diagram illustrating an example of the hardware configuration of server 600 according to an embodiment. The server 600 includes a processor 610, a memory 620, a storage 630, an input/output interface 640, and a communication interface 650 as main components. Each component is connected to a bus 660, respectively.

Processor 610 executes a series of instructions included in a program stored in memory 620 or storage 630 based on a signal given to server 600 or based on the fulfillment of a predetermined condition. In some aspects, processor 610 is implemented as a CPU, GPU, MPU, FPGA, or other device.

Memory 620 temporarily stores programs and data. The program is loaded from storage 630, for example. The data includes data input to server 600 and data generated by processor 610. In some aspects, memory 620 is implemented as RAM or other volatile memory.

Storage 630 permanently holds programs and data. The storage 630 is implemented as, for example, a ROM, a hard disk device, a flash memory, or other nonvolatile storage device. The programs stored in the storage 630 may include a program for providing a virtual space in the HMD system 100, a simulation program, a game program, a user authentication program, and a program for realizing communication with the computer 200. The data stored in the storage 630 may include data and objects for defining a virtual space.

In another aspect, storage 630 may be implemented as a removable storage device such as a memory card. In yet another aspect, a configuration may be used in which programs and data stored in an external storage device are used instead of the storage 630 built into the server 600. According to such a configuration, for example, in a scene where a plurality of HMD systems 100 are used, such as in an amusement facility, it becomes possible to update programs and data all at once.

Input/output interface 640 communicates signals with input/output devices. In one aspect, the input/output interface 640 is implemented using a USB, DVI, HDMI, or other terminal. The input/output interface 640 is not limited to those described above.

Communication interface 650 is connected to network 2 and communicates with computer 200 connected to network 2 . In one aspect, the communication interface 650 is implemented as, for example, a LAN or other wired communication interface, or a WiFi, Bluetooth, NFC, or other wireless communication interface. Communication interface 650 is not limited to those described above.

In some aspects, processor 610 accesses storage 630, loads one or more programs stored in storage 630 into memory 620, and executes a series of instructions contained in the programs. The one or more programs may include the operating system of the server 600, an application program for providing a virtual space, game software executable in the virtual space, and the like. Processor 610 may send signals to computer 200 to provide the virtual space via input/output interface 640.

[HMD control device]
A control device for the HMD 120 will be described with reference to FIG. 10. In one embodiment, the control device is implemented by a computer 200 having a known configuration. FIG. 10 is a block diagram illustrating computer 200 as a modular configuration according to an embodiment.

As shown in FIG. 10, the computer 200 includes a control module 510, a rendering module 520, a memory module 530, and a communication control module 540. In some aspects, control module 510 and rendering module 520 are implemented by processor 210. In another aspect, multiple processors 210 may act as control module 510 and rendering module 520. Memory module 530 is realized by memory 220 or storage 230. Communication control module 540 is realized by communication interface 250.

Control module 510 controls virtual space 11 provided to user 5 . Control module 510 defines virtual space 11 in HMD system 100 using virtual space data representing virtual space 11 . The virtual space data is stored in the memory module 530, for example. The control module 510 may generate virtual space data or obtain virtual space data from the server 600 or the like.

The control module 510 places objects in the virtual space 11 using object data representing the objects. Object data is stored in memory module 530, for example. The control module 510 may generate object data or obtain object data from the server 600 or the like. The objects include, for example, an avatar object that is the alter ego of the user 5, a character object, an operation object such as a virtual hand operated by the controller 300, landscapes including forests, mountains, etc. that are arranged according to the progress of the game story, cityscapes, and animals. etc. may be included.

The control module 510 places the avatar object of the user 5 of the other computer 200 connected via the network 2 in the virtual space 11 . In one aspect, the control module 510 places the avatar object of the user 5 in the virtual space 11. In one aspect, the control module 510 places an avatar object imitating the user 5 in the virtual space 11 based on an image including the user 5. In another aspect, the control module 510 arranges in the virtual space 11 an avatar object selected by the user 5 from among multiple types of avatar objects (for example, an object imitating an animal or a deformed human object). do.

Control module 510 identifies the tilt of HMD 120 based on the output of HMD sensor 410. In another aspect, control module 510 identifies the tilt of HMD 120 based on the output of sensor 190 functioning as a motion sensor. The control module 510 detects organs (eg, mouth, eyes, eyebrows) that make up the user's 5 face from the images of the user's 5 face generated by the first camera 150 and the second camera 160. The control module 510 detects the movement (shape) of each detected organ.

Control module 510 detects the line of sight of user 5 in virtual space 11 based on the signal from gaze sensor 140 . The control module 510 detects a viewpoint position (coordinate value in the XYZ coordinate system) where the detected line of sight of the user 5 intersects with the celestial sphere of the virtual space 11. More specifically, the control module 510 detects the viewpoint position based on the line of sight of the user 5 defined by the uvw coordinate system and the position and tilt of the virtual camera 14. Control module 510 transmits the detected viewpoint position to server 600. In another aspect, control module 510 may be configured to send gaze information representative of user's 5 gaze to server 600. In this case, the viewpoint position can be calculated based on the line-of-sight information received by the server 600.

The control module 510 reflects the movement of the HMD 120 detected by the HMD sensor 410 on the avatar object. For example, the control module 510 detects that the HMD 120 is tilted and places the avatar object at a tilt. The control module 510 reflects the detected motions of the facial organs on the face of the avatar object placed in the virtual space 11. The control module 510 receives the gaze information of the other user 5 from the server 600, and reflects the information on the gaze of the avatar object of the other user 5. In one aspect, the control module 510 reflects the movement of the controller 300 on the avatar object and the operation object. In this case, the controller 300 includes a motion sensor, an acceleration sensor, a plurality of light emitting elements (for example, infrared LEDs), etc. for detecting the movement of the controller 300.

The control module 510 arranges in the virtual space 11 an operation object for receiving an operation by the user 5 in the virtual space 11 . The user 5 operates, for example, an object arranged in the virtual space 11 by operating the operation object. In one aspect, the operation object may include, for example, a hand object that is a virtual hand corresponding to the user's 5 hand. In one aspect, the control module 510 moves the hand object in the virtual space 11 in conjunction with the movement of the user's 5 hand in the real space based on the output of the motion sensor 420. In one aspect, the manipulation object may correspond to a hand portion of an avatar object.

The control module 510 detects a collision when each of the objects arranged in the virtual space 11 collides with another object. The control module 510 can detect, for example, the timing at which a collision area of a certain object touches a collision area of another object, and performs predetermined processing when this detection is performed. The control module 510 can detect the timing when objects are no longer in contact with each other, and performs predetermined processing when this detection is performed. The control module 510 can detect that objects are touching. For example, when a manipulation object and another object touch, the control module 510 detects the contact between the manipulation object and the other object, and performs a predetermined process.

In one aspect, control module 510 controls image display on monitor 130 of HMD 120. For example, the control module 510 arranges the virtual camera 14 in the virtual space 11. The control module 510 controls the position of the virtual camera 14 in the virtual space 11 and the tilt (orientation) of the virtual camera 14. The control module 510 defines the viewing area 15 according to the tilt of the head of the user 5 wearing the HMD 120 and the position of the virtual camera 14. The rendering module 520 generates the viewing image 17 displayed on the monitor 130 based on the determined viewing area 15. The view image 17 generated by the rendering module 520 is output to the HMD 120 by the communication control module 540.

When control module 510 detects user 5's utterance using microphone 170 from HMD 120, control module 510 identifies computer 200 to which audio data corresponding to the utterance is to be transmitted. The audio data is sent to the specified computer 200 by control module 510. When control module 510 receives audio data from another user's computer 200 via network 2, it outputs audio (speech) corresponding to the audio data from speaker 180.

Memory module 530 holds data used by computer 200 to provide virtual space 11 to user 5 . In some aspects, memory module 530 maintains spatial information, object information, and user information.

The spatial information holds one or more templates defined for providing the virtual space 11.

The object information includes a plurality of panoramic images 13 constituting the virtual space 11 and object data for arranging objects in the virtual space 11. Panoramic image 13 may include still images and moving images. The panoramic image 13 may include an image in a non-real space and an image in a real space. Examples of images in unreal space include images generated by computer graphics.

The user information holds a user ID that identifies the user 5. The user ID may be, for example, an IP (Internet Protocol) address or a MAC (Media Access Control) address set on the computer 200 used by the user. In another aspect, the user ID may be set by the user. The user information includes a program for causing the computer 200 to function as a control device for the HMD system 100, and the like.

Data and programs stored in memory module 530 are input by user 5 of HMD 120. Alternatively, processor 210 downloads a program or data from a computer (for example, server 600) operated by a business providing the content, and stores the downloaded program or data in memory module 530.

The communication control module 540 can communicate with the server 600 and other information communication devices via the network 2.

In certain aspects, control module 510 and rendering module 520 may be implemented using, for example, Unity® provided by Unity Technologies. In another aspect, the control module 510 and the rendering module 520 may be implemented as a combination of circuit elements that implement each process.

Processing in computer 200 is realized by hardware and software executed by processor 210. Such software may be pre-stored in the hard disk or other memory module 530. Software may be stored on a CD-ROM or other computer-readable non-volatile data storage medium and distributed as a program product. Alternatively, the software may be provided as a downloadable program product by an information provider connected to the Internet or other networks. Such software is read from a data recording medium by an optical disk drive or other data reading device, or is downloaded from the server 600 or other computer via the communication control module 540, and then temporarily stored in the storage module. . The software is read from the storage module by processor 210 and stored in RAM in the form of an executable program. Processor 210 executes the program.

[Control structure of HMD system]
The control structure of the HMD set 110 will be described with reference to FIG. 11. FIG. 11 is a sequence chart showing part of the processing performed in the HMD set 110 according to an embodiment.

As shown in FIG. 11, in step S1110, the processor 210 of the computer 200, as the control module 510, specifies virtual space data and defines the virtual space 11.

In step S1120, processor 210 initializes virtual camera 14. For example, in the work area of the memory, the processor 210 places the virtual camera 14 at a predefined center point 12 in the virtual space 11, and directs the line of sight of the virtual camera 14 in the direction in which the user 5 is facing.

In step S1130, processor 210, as rendering module 520, generates view image data for displaying the initial view image. The generated visual field image data is output to the HMD 120 by the communication control module 540.

In step S1132, monitor 130 of HMD 120 displays a visual field image based on the visual field image data received from computer 200. The user 5 wearing the HMD 120 can recognize the virtual space 11 by viewing the visual field image.

In step S1134, HMD sensor 410 detects the position and tilt of HMD 120 based on a plurality of infrared lights emitted from HMD 120. The detection results are output to the computer 200 as motion detection data.

In step S1140, processor 210 identifies the viewing direction of user 5 wearing HMD 120 based on the position and tilt included in the motion detection data of HMD 120.

In step S1150, processor 210 executes the application program and places objects in virtual space 11 based on instructions included in the application program.

In step S1160, controller 300 detects the operation of user 5 based on the signal output from motion sensor 420, and outputs detection data representing the detected operation to computer 200. In another aspect, the operation of the controller 300 by the user 5 may be detected based on images from cameras placed around the user 5.

In step S1170, processor 210 detects the operation of controller 300 by user 5 based on the detection data acquired from controller 300.

In step S1180, processor 210 generates visual field image data based on user 5's operation of controller 300. The generated visual field image data is output to the HMD 120 by the communication control module 540.

In step S1190, HMD 120 updates the view image based on the received view image data, and displays the updated view image on monitor 130.

[Avatar object]
The avatar object according to this embodiment will be described with reference to FIGS. 12(A) and 12(B). The following is a diagram explaining the avatar objects of each user 5 of the HMD sets 110A and 110B. Hereinafter, the user of HMD set 110A will be referred to as user 5A, the user of HMD set 110B will be referred to as user 5B, the user of HMD set 110C will be referred to as user 5C, and the user of HMD set 110D will be referred to as user 5D. A is attached to the reference numeral of each component regarding the HMD set 110A, B is attached to the reference numeral of each component regarding the HMD set 110B, C is attached to the reference numeral of each component regarding the HMD set 110C, and the HMD set D is added to the reference numeral of each component related to 110D. For example, HMD 120A is included in HMD set 110A.

FIG. 12A is a schematic diagram showing a situation in which each HMD 120 provides the virtual space 11 to the user 5 in the network 2. Computers 200A to 200D provide virtual spaces 11A to 11D to users 5A to 5D via HMDs 120A to 120D, respectively. In the example shown in FIG. 12(A), the virtual space 11A and the virtual space 11B are configured by the same data. In other words, the computer 200A and the computer 200B share the same virtual space. In the virtual space 11A and the virtual space 11B, an avatar object 6A of the user 5A and an avatar object 6B of the user 5B exist. The avatar object 6A in the virtual space 11A and the avatar object 6B in the virtual space 11B are each wearing an HMD 120, but this is to make the explanation easier to understand, and in reality, these objects are not wearing the HMD 120. Not yet.

In one aspect, the processor 210A may place the virtual camera 14A that captures the visual field image 17A of the user 5A at the eye position of the avatar object 6A.

FIG. 12(B) is a diagram showing the visual field image 17A of the user 5A in FIG. 12(A). The visual field image 17A is an image displayed on the monitor 130A of the HMD 120A. This visual field image 17A is an image generated by the virtual camera 14A. An avatar object 6B of the user 5B is displayed in the view image 17A. Although not particularly illustrated, the avatar object 6A of the user 5A is also displayed in the visual field image of the user 5B.

In the state shown in FIG. 12(B), the user 5A can communicate with the user 5B through dialogue through the virtual space 11A. More specifically, user 5A's voice acquired by microphone 170A is transmitted to user 5B's HMD 120B via server 600, and output from speaker 180B provided in HMD 120B. User 5B's voice is transmitted to user 5A's HMD 120A via server 600, and output from speaker 180A provided in HMD 120A.

The actions of the user 5B (the actions of the HMD 120B and the actions of the controller 300B) are reflected on the avatar object 6B placed in the virtual space 11A by the processor 210A. Thereby, the user 5A can recognize the actions of the user 5B through the avatar object 6B.

FIG. 13 is a sequence chart showing part of the processing executed in HMD system 100 according to this embodiment. Although the HMD set 110D is not illustrated in FIG. 13, the HMD set 110D also operates in the same manner as the HMD sets 110A, 110B, and 110C. In the following description, A is added to the reference numeral of each component regarding the HMD set 110A, B is added to the reference numeral of each component regarding the HMD set 110B, and C is added to the reference numeral of each component regarding the HMD set 110C. D is added to the reference numeral of each component related to the HMD set 110D.

In step S1310A, processor 210A in HMD set 110A acquires avatar information for determining the behavior of avatar object 6A in virtual space 11A. This avatar information includes information regarding the avatar, such as movement information, face tracking data, and voice data. The motion information includes information indicating temporal changes in the position and tilt of the HMD 120A, information indicating the movement of the user's 5A hand detected by the motion sensor 420A, and the like. Examples of the face tracking data include data that specifies the position and size of each part of the user's 5A face. Examples of the face tracking data include data indicating the movement of each organ that makes up the face of the user 5A and line of sight data. Examples of the audio data include data representing the user's 5A's voice acquired by the microphone 170A of the HMD 120A. The avatar information may include information that specifies the avatar object 6A or the user 5A associated with the avatar object 6A, information that specifies the virtual space 11A in which the avatar object 6A exists, and the like. Information that specifies the avatar object 6A and the user 5A includes a user ID. A room ID can be cited as information for specifying the virtual space 11A in which the avatar object 6A exists. Processor 210A transmits the avatar information acquired as described above to server 600 via network 2.

In step S1310B, processor 210B in HMD set 110B acquires avatar information for determining the behavior of avatar object 6B in virtual space 11B, and transmits it to server 600, similar to the process in step S1310A. Similarly, in step S1310C, processor 210B in HMD set 110C acquires avatar information for determining the behavior of avatar object 6C in virtual space 11C, and transmits it to server 600.

In step S1320, server 600 temporarily stores the player information received from each of HMD set 110A, HMD set 110B, and HMD set 110C. The server 600 integrates the avatar information of all users (in this example, users 5A to 5C) associated with the common virtual space 11 based on the user ID, room ID, etc. included in each avatar information. Then, the server 600 transmits the integrated avatar information to all users associated with the virtual space 11 at a predetermined timing. As a result, synchronization processing is executed. Such synchronization processing allows HMD set 110A, HMD set 110B, and HMD set 110C to share each other's avatar information at approximately the same timing.

Subsequently, each HMD set 110A to 110C executes the processes of steps S1330A to S1330C based on the avatar information transmitted from server 600 to each HMD set 110A to 110C. The process in step S1330A corresponds to the process in step S1180 in FIG.

In step S1330A, the processor 210A in the HMD set 110A updates the information of the avatar objects 6B and 6C of the other users 5B and 5C in the virtual space 11A. Specifically, processor 210A updates the position, orientation, etc. of avatar object 6B in virtual space 11 based on movement information included in the avatar information transmitted from HMD set 110B. For example, the processor 210A updates the information (position, orientation, etc.) of the avatar object 6B included in the object information stored in the memory module 530. Similarly, the processor 210A updates the information (position, orientation, etc.) of the avatar object 6C in the virtual space 11 based on the movement information included in the avatar information transmitted from the HMD set 110C.

In step S1330B, processor 210B in HMD set 110B updates information on avatar objects 6A and 6C of users 5A and 5C in virtual space 11B, similar to the process in step S1330A. Similarly, in step S1330C, the processor 210C in the HMD set 110C updates the information of the avatar objects 6A, 6B of the users 5A, 5B in the virtual space 11C.

Next, the flow of the 360-degree content distribution process in the program according to this embodiment will be explained with reference to FIGS. 14 to 20. FIG. 14 is a sequence chart showing the flow of 360-degree content distribution processing. FIG. 15, FIG. 17, and FIG. 18 are diagrams showing examples of 360-degree content distributed to the user side. FIG. 16 is a schematic diagram for explaining the process of embedding watermark information in 360-degree content, and FIG. 19 is a schematic diagram for explaining the process of canceling the embedded watermark information. FIG. 20 is a diagram showing a state in which watermark information embedded in 360-degree content is offset.

As shown in FIG. 14, when the user 5A wearing the HMD 120 of the HMD set 110A performs an input operation requesting installation of a viewing application in order to view 360-degree content, in step S1431, the processor of the HMD set 110A 210A transmits an installation request signal for a 360-degree content viewing application to the server 600.

In step S1432, the server 600 (an example of an information processing device) reads information regarding the 360-degree content viewing application (hereinafter referred to as application information) from the storage 630 based on the installation request signal received from the HMD set 110A. The application information includes the actual file of the 360-degree content viewing application, the communication protocol necessary to obtain the application, location information, and the like.

The application information also includes information on a method for canceling watermark information embedded in 360-degree content distributed via the application (hereinafter referred to as cancellation information), and information associated with the position where the watermark information is embedded. Information regarding the reference position (hereinafter referred to as reference position information) is included. The cancellation information may include, for example, algorithms and parameters for canceling the watermark information. The cancellation information may include a single cancellation method or a plurality of cancellation methods. The reference position information includes, for example, specific coordinate values in the coordinate system of the 360-degree content. It is preferable that the reference position is a coordinate value included in the initial view image of the 360-degree content displayed on the HMD 120.

In step S1433, the server 600 delivers application information including cancellation information and reference position information to the HMD set 110A.

In step S1434, the processor 210A in the HMD set 110A installs the 360-degree content viewing application based on the application information distributed from the server 600 to the HMD set 110A, and acquires cancellation information and reference position information. Thereby, the user 5A wearing the HMD 120 can view desired 360-degree content distributed via the platform image displayed on the HMD 120 by running the installed application. Although not shown, specifically, the platform image is associated with summary images (thumbnails) of a plurality of viewing 360-degree video contents stored in the storage 630 of the server 600. Each viewing 360-degree video content whose corresponding thumbnail is associated with a platform image is a content candidate (candidate video content) that the user 5A can select for viewing. By selecting a thumbnail, the user 5A can select candidate video content corresponding to the thumbnail. The selection of a thumbnail may be executed when the user 5A's line of sight is directed toward a specific thumbnail for a predetermined period of time or more, or may be executed by the user 5A's operation of the controller 300.

In step S1435, the processor 210A specifies the target thumbnail based on the input operation by the user 5A, and requests viewing of the 360-degree video content associated with the specified thumbnail from among the plurality of candidate video contents. A signal (hereinafter referred to as a viewing request signal) is transmitted to the server 600.

In step S1436, the server 600 identifies the target 360-degree video content among the plurality of 360-degree video contents stored in the storage 630 based on the viewing request signal received from the HMD set 110A. FIG. 15 shows an initial view image 1561 of the 360-degree video content identified in step S1436. A point 1562 shown in FIG. 15 indicates a reference position set in the coordinate system of 360-degree video content. For the sake of explanation, the reference position (point) 1562 is shown in a visually recognizable state in FIG. 15, but the reference position 1562 is not displayed in the actual view image.

In step S1437, the server 600 embeds watermark information in the 360-degree video content. Watermark information is embedded as a digital watermark by performing color conversion on 360-degree video content using a reversible method. As shown in FIG. 16, watermark information is created by adding color information in a predetermined shape (for example, a logo 1663 to indicate the authentic source of the 360-degree video content) to a view image 1561 of the 360-degree video content. May be embedded. If the color of the 360-degree video content is specified by RGB values, for example, by setting the B value to +100 in the shape of the logo 1663 in the area that includes the reference position 1562, the difference between the logo 1663 and the part other than the logo 1663 can be changed. Can change color. By expressing the watermark information with the logo 1663, when the logo 1663 is displayed on the 360-degree video content that is being played, viewers who view the logo 1663 can recognize the genuine source of the 360-degree video content that is being played. Can be done.

FIG. 17 shows an example of an initial view image 1761 of 360-degree video content with a logo 1663 embedded. As described above, the position where the logo 1663 is embedded is associated with the reference position information (for example, the reference position 1562) included in the application information distributed from the server 600 to the HMD set 110A in step S1433. In the example shown in FIG. 17, the logo 1663 is embedded in the reference position 1562 of the 360-degree video content, but it may be embedded in a position offset by a predetermined distance from the reference position 1562.

Further, it is preferable that the logo 1663 is embedded in a position or size that does not obstruct viewing of the view image 1761 of the 360-degree video content by the user 5A. Specifically, as shown in FIG. 17, the logo 1663 is preferably placed in the lower region of the initial view image 1761 of the 360-degree video content. Even if the 360-degree video content in which the logo 1663 is embedded is not illegally copied, for example, if the 360-degree video content distributed by the genuine right holder is viewed using a general-purpose browser, it may be used as a digital watermark. The embedded logo 1663 cannot be canceled. Therefore, it is preferable to embed the logo 1663 in a position and size that does not obstruct viewing of the 360-degree video content.

As described above, after the logo 1663 is embedded at a specific coordinate value in the 360-degree video content, the 360-degree video content with the logo 1663 embedded is distributed to the HMD set 110A. Therefore, for example, when the virtual viewpoint (visual field) changes depending on the direction of the head of the user 5A wearing the HMD 120, the logo 1663 is displayed in the visual field image as shown in the visual field image 1817 in FIG. The position also changes. That is, the logo 1663 is not fixedly displayed in a specific area within the view image, but may be removed from the view image and no longer visible depending on a change in the virtual viewpoint.

In step S1438, the server 600 sets the data of the 360-degree video content in which the logo 1663 is embedded and information regarding the embedding position of the logo 1663 in the coordinate system of the 360-degree video content (hereinafter referred to as embedding position information) into the HMD set. 110A to the processor 210A.

In step S1439, the processor 210A of the HMD set 110A determines, based on the 360-degree video content data and embedding position information acquired from the server 600, that the embedding position of the logo 1663 is at the reference position included in the reference position information acquired in step S1434. It is determined whether or not it matches 1562.

If it is determined that the embedding position of the logo 1663 matches the reference position 1562 (YES in step S1439), in step S1441, the processor 210A performs 360 The logo 1663 embedded in the standard position 1562 of the video content is canceled.

The cancellation information includes, for example, information to perform the opposite conversion (inverse conversion) on the logo 1663 embedded by color conversion in the 360-degree video content. Therefore, the processor 210A cancels the logo 1663 by subtracting the color information of the logo 1663 embedded in the reference position 1562 of the 360-degree video content. Specifically, as shown in FIG. 19, the processor 210A changes the color of the logo 1663 by setting the B value of the RGB values that make up the color to −100 (i.e., Return to the state before the logo 1663 was embedded in the 360-degree video content 1561). In this way, in this step, the logo 1663 as a digital watermark embedded in the 360-degree video content can be canceled by performing inverse conversion of the reversible color conversion process.

In step S1442, the processor 210A displays an initial view image of the 360-degree video content with the logo 1663 canceled out on the monitor 130 of the HMD 120. In the view image displayed on the HMD 120 in this step, the logo 1663 is not displayed, similar to the initial view image 1561 of the 360-degree video content shown in FIG.

On the other hand, if it is determined in step S1439 that the embedding position of the logo 1663 does not match the reference position 1562 (NO in step S1439), the processor 210A embeds the logo 1663 in the reference position 1562 in step S1443. Determine the amount of position offset. For example, as shown in FIG. 20, when the logo 1663 is offset by a distance 2062 from the reference position 1562, the processor 210A calculates the amount of offset of the logo 1663 from the reference position 1562 in the coordinate system of the 360-degree video content. Identify in relation to.

In step S1444, processor 210A cancels logo 1663 embedded at a position offset by distance 2062 from reference position 1562 based on the specified offset amount. The method for canceling the logo 1663 is specified based on the cancellation information, similar to step S1441. Then, the processor 210A plays back the 360-degree video content with the logo 1663 canceled on the HMD 120 (step S1442). In this case as well, the logo 1663 is not displayed in the view image displayed on the HMD 120, similar to the initial view image 1561 of the 360-degree video content shown in FIG.

Next, a case will be described with reference to FIG. 14 about a case where the external device 700, which does not have an application for viewing 360-degree video content installed, illegally exploits data of 360-degree video content in which watermark information is embedded from the server 600. do. In step S1451, the external device 700 illegally copies the data of the 360-degree video content in which the logo 1663 is embedded. For example, the external device 700 exploits data of 360-degree video content stored in the server 600 using an unauthorized copying tool or the like.

In step S1452, the external device 700 plays back the illegally copied 360-degree video content. In this case, a logo 1663 is displayed in the view image of the 360-degree video content played by the external device 700, as in the view image 1761 shown in FIG. Therefore, the viewer who views the field of view image 1761 of the 360-degree video content being played on the external device 700 can visually recognize the logo 1663 that indicates the information of the genuine right holder of the 360-degree video content. It is possible to recognize that content has been illegally copied.

As explained above, according to the program according to the present embodiment, the processor 210A of the HMD set 110A acquires the 360-degree video content in which the logo 1663 as watermark information is embedded and the cancellation information of the logo 1663 from the server 600. However, the 360-degree video content (view image 1561) is configured to be played back with the logo 1663 canceled based on the cancellation information. Here, the logo 1663 as watermark information is obtained by reversibly converting at least part of the information of the 360-degree video content. On the other hand, in the external device 700 that illegally exploited the 360-degree video content, the 360-degree video content (view image 1761) is played back while the logo 1663, which is watermark information, is displayed. According to this configuration, if the 360-degree video content is acquired through a genuine application, the 360-degree video content will be displayed with the watermark information canceled, and if the 360-degree video content is illegally copied. 360-degree video content is displayed without the watermark information being canceled. This allows the user (viewer) to easily recognize whether the reproduced 360-degree video content has been illegally copied.

Further, in the program according to the present embodiment, the processor 210A acquires the reference position 1562 associated with the coordinate system of the 360-degree video content from the server 600 at a predetermined timing, and embeds the reference position 1562 in the position associated with the reference position 1562. It is configured to cancel out the logo 1663. According to this configuration, the processor 210A can easily and reliably cancel the logo 1663 by sharing the reference position 1562 in which the logo 1663 is embedded with the server 600 that is the distribution side of the 360-degree video content. Can be done.

Furthermore, in the program according to the present embodiment, the processor 210A acquires offset information associated with the reference position 1562 from the server 600 at a predetermined timing, and embeds the offset information at a position offset from the reference position 1562 based on the offset information. The logo 1663 may be configured to cancel out the logo 1663. In this way, by offsetting the embedding position of the logo 1663 from the reference position 1562, it is possible to take measures to prevent the logo 1663 from being easily canceled out if the 360-degree video content is illegally copied.

Note that the offset position of the logo 1663 with respect to the reference position 1562 may change as the playback time of the 360-degree video content passes. For example, as the reproduction of the 360-degree video content progresses, the logo 1663 may move along the horizontal direction of the virtual space away from the reference position 1562. This makes it possible to more reliably take measures to prevent the logo 1663 from being erased in illegally copied 360-degree video content.

Furthermore, in the program according to the present embodiment, the processor 210A acquires cancellation information regarding a method for canceling the logo 1663 from the server 600 at a predetermined timing, and cancels the logo 1663 based on the acquired cancellation information. It is configured. According to this configuration, unless the cancellation information is illegally exploited, the logo 1663 will not be canceled easily, and it is possible to more reliably take measures to prevent the cancellation of the logo 1663 in illegally copied 360-degree video content. .

Note that the processor 210A obtains information regarding a plurality of cancellation methods from the server 600 as cancellation information for canceling the logo 1663, and specifies designation information specifying a specific cancellation method among the plurality of cancellation methods in a predetermined manner. The logo 1663 may be configured to be obtained from the server 600 at a certain timing and to cancel the logo 1663 using a specific cancellation method specified based on the specified information. For example, in addition to the method of adding or subtracting the B value among the RGB values that make up the color of the 360-degree video content, a method of adding or subtracting the R value or the G value may be adopted. In this case, when the data of the 360-degree video content is distributed from the server 600 to the HMD set 110A in step S1438, information regarding the method of embedding the logo 1663 (which color information among the RGB values should be subtracted) is also distributed. , processor 210A can appropriately cancel logo 1663 based on the distributed embedding method. In this way, by sharing a plurality of cancellation methods between the server 600 and the HMD set 110A and appropriately selecting a predetermined cancellation method from the plurality of cancellation methods, it is possible to prevent unauthorized duplication of 360-degree video content. It is possible to more reliably take measures to prevent the logo 1663 from being easily canceled out.

Note that, in order to strengthen countermeasures against unauthorized duplication, the designation information of the cancellation method may be configured to change as the playback time of the 360-degree video content passes. For example, the conversion value of color information can be changed as the playback time passes. Specifically, a method can be considered in which the converted value of the B value is gradually increased or decreased from +100 as the reproduction time progresses. Furthermore, the size of the logo 1663 may be changed as the playback time passes.

Note that in the above embodiment, an example is described in which only one logo 1663 is embedded in the initial view image 1761 of the 360-degree video content, but the present invention is not limited to this example. For example, multiple logos 1663 may be displayed on the 360-degree video content at intervals narrower than the visible image of the illegally exploited 360-degree video content (for example, if the external device 700 is a tablet or smartphone, the display screen of these devices). May be embedded. According to this configuration, even if the view image of the 360-degree video content changes, at least one logo 1663 can be reliably displayed within the view image. Therefore, countermeasures against unauthorized duplication can be strengthened.

Furthermore, in the program according to the present embodiment, the server 600 acquires specific 360-degree video content based on the viewing request signal (reads it from the storage unit 620), and embeds a logo 1663 as watermark information in the 360-degree video content. , is configured to deliver 360-degree video content in which a logo 1663 is embedded to the HMD set 110A. According to this configuration, it is possible to provide a program that can easily determine whether or not copied 360-degree video content is fraudulent.

In the above embodiment, the virtual space (VR space) in which the user is immersed by the HMD 120 has been described as an example, but a transmissive HMD may be adopted as the HMD. In this case, an augmented reality (AR) space or a mixed reality (AR) space or mixed reality (AR) space or mixed reality ( A virtual experience in an MR (Mixed Reality) space may be provided to the user. In this case, an effect on the target object in the virtual space may be caused based on the movement of the user's hand instead of the operation object. Specifically, the processor may specify the coordinate information of the position of the user's hand in the real space, and define the position of the target object in the virtual space in relation to the coordinate information in the real space. This enables the processor to grasp the positional relationship between the user's hand in real space and the target object in virtual space, and execute processing corresponding to the above-mentioned collision control etc. between the user's hand and the target object. . As a result, it becomes possible to apply an action to the target object based on the user's hand movements.

Although the embodiments of the present disclosure have been described above, the technical scope of the present invention should not be interpreted to be limited by the description of the present embodiments. This embodiment is an example, and those skilled in the art will understand that various changes can be made within the scope of the invention as set forth in the claims. The technical scope of the present invention should be determined based on the scope of the invention described in the claims and the scope of equivalents thereof.

[Additional notes]
The contents of the present disclosure are listed below.

(Item 1)
obtaining 360-degree content with embedded watermark information;
A program for causing a computer to execute a step of reproducing the 360-degree content with the watermark information canceled,
The program, wherein the watermark information is obtained by reversibly converting at least part of information of the 360-degree content.
According to this configuration, it is possible to provide a program that can easily determine whether or not the 360-degree content being reproduced has been illegally copied.

(Item 2)
further causing the computer to execute a step of acquiring a reference position associated with the coordinate system of the 360-degree content at a predetermined timing;
The program according to item 1, wherein in the step of reproducing, the watermark information embedded in a position associated with the reference position is canceled.
According to this configuration, by sharing the reference position in which the watermark information is embedded with the 360-degree content distribution side, it is possible to easily and reliably cancel the watermark information.

(Item 3)
further causing the computer to execute a step of acquiring offset information associated with the reference position at a predetermined timing;
The program according to item 2, wherein in the reproducing step, the watermark information embedded in a position offset from the reference position is canceled based on the offset information.

(Item 4)
The program according to item 3, wherein the offset position changes as the playback time of the 360-degree content changes.

(Item 5)
further causing the computer to execute a step of acquiring cancellation information regarding a method for canceling the watermark information at a predetermined timing;
The program according to any one of items 1 to 4, wherein in the step of reproducing, the watermark information is canceled based on the cancellation information.

(Item 6)
The computer further includes a step of acquiring at a predetermined timing cancellation information regarding a plurality of cancellation methods for canceling the watermark information and designation information specifying a specific cancellation method among the plurality of cancellation methods. let it run,
The program according to any one of items 1 to 4, wherein in the step of reproducing, the watermark information is canceled by the specific cancellation method based on the cancellation information and the specified information.

(Item 7)
The program according to item 6, wherein the designation information changes as the playback time of the 360-degree content changes.

In order to take measures to prevent watermark information from being easily canceled when 360-degree content is illegally copied, it is preferable to adopt configurations such as items 3 to 7 above.

(Item 8)
The program according to any one of items 1 to 7, wherein the watermark information is embedded in the 360-degree content at a position or size that does not hinder viewing of the 360-degree content.
Even if the 360-degree content is not copied illegally, for example, if the watermark information is viewed using a general-purpose browser, the watermark information cannot be canceled. It is preferable to arrange it so as not to obstruct viewing.

(Item 9)
The program according to any one of items 1 to 8, wherein a plurality of the watermark information is embedded in the 360-degree content at intervals narrower than a display area of an image display device on which the 360-degree content is displayed.
According to this configuration, even if the display area of the 360-degree content (for example, the viewing area if the image display device is a head-mounted device associated with the user's head) changes, the watermark information is always displayed. It can be displayed within the area.

(Item 10)
The program according to any one of items 1 to 9, wherein the watermark information is embedded in the 360-degree content in the shape of a logo associated with the owner of the 360-degree content.
According to this configuration, when the 360-degree content is illegally copied, the function of displaying the origin of the 360-degree content can be performed.

(Item 11)
An information processing device including a processor,
obtaining 360-degree content with embedded watermark information;
reproducing the 360-degree content with the watermark information canceled;
is executed under the control of the processor,
The information processing apparatus, wherein the watermark information is obtained by reversibly converting at least part of information of the 360-degree content.

(Item 12)
An information processing method performed by a computer, the method comprising:
obtaining 360-degree content with embedded watermark information;
reproducing the 360-degree content with the watermark information canceled;
including;
The information processing method, wherein the watermark information is obtained by reversibly converting at least part of information of the 360-degree content.

(Item 13)
acquiring 360 degree content;
embedding watermark information in the 360 degree content;
A program for causing a computer to execute the step of distributing the 360-degree content,
The program, wherein the watermark information is obtained by reversibly converting at least part of information of the 360-degree content.
According to this configuration, it is possible to provide a program that can easily determine whether or not the 360-degree content being reproduced has been illegally copied.

(Item 14)
further causing the computer to execute a step of distributing a reference position associated with the coordinate system of the 360-degree content at a predetermined timing;
14. The program according to item 13, wherein the watermark information is embedded in a position associated with the reference position.
According to this configuration, by sharing the reference position in which the watermark information is embedded with the 360-degree content playback side, it is possible to easily and reliably cancel the watermark information.

(Item 15)
further causing the computer to execute a step of distributing offset information associated with the reference position at a predetermined timing;
15. The program according to item 14, wherein the watermark information is embedded in a position associated with the offset information.

(Item 16)
The program according to item 15, wherein the offset information changes as the playback time of the 360-degree content changes.

(Item 17)
The program according to any one of items 13 to 16, further causing the computer to execute a step of distributing cancellation information regarding a method for canceling the watermark information at a predetermined timing.

(Item 18)
Further, the step of distributing to the computer at a predetermined timing cancellation information regarding a plurality of cancellation methods for canceling the watermark information and designation information specifying a specific cancellation method among the plurality of cancellation methods. The program according to any one of items 13 to 16 to be executed.

(Item 19)
The program according to item 18, wherein the designation information changes as the playback time of the 360-degree content changes.

In order to take measures to prevent watermark information from being easily canceled when 360-degree content is illegally copied, it is preferable to adopt configurations such as items 15 to 19 above.

(Item 20)
The program according to any one of items 13 to 19, wherein the watermark information is embedded in the 360-degree content at a position or size that does not obstruct viewing of the 360-degree content.
Even in cases other than when 360-degree content is illegally copied, for example, watermark information cannot be canceled when viewed using a general-purpose browser, so in such cases, watermark information may impede viewing of 360-degree content. It is preferable to arrange it so that it does not occur.

(Item 21)
The program according to any one of items 13 to 20, wherein a plurality of the watermark information is embedded in the 360-degree content at intervals narrower than a display area of an image display device in which the 360-degree content is displayed.
According to this configuration, even if the display area of the 360-degree content (for example, the viewing area if the image display device is a head-mounted device associated with the user's head) changes, the watermark information is always displayed. It can be displayed within the area.

(Item 22)
The program according to any one of items 13 to 21, wherein the watermark information is embedded in the 360-degree content in the shape of a logo associated with the owner of the 360-degree content.
According to this configuration, when the 360-degree content is illegally copied, the function of displaying the origin of the 360-degree content can be performed.

(Item 23)
An information processing device including a processor,
acquiring 360 degree content;
embedding watermark information in the 360 degree content;
the step of distributing the 360-degree content is performed under the control of the processor;
The information processing apparatus, wherein the watermark information is obtained by reversibly converting at least part of information of the 360-degree content.

(Item 24)
An information processing method performed by a computer, the method comprising:
acquiring 360 degree content;
embedding watermark information in the 360 degree content;
delivering the 360 degree content;
including;
The information processing method, wherein the watermark information is obtained by reversibly converting at least part of information of the 360-degree content.

2: Network 11: Virtual space 13: Panoramic image 14: Virtual camera 15: Viewing area 17: Viewing image 100: HMD system 110: HMD set 120: HMD
130: Monitor 140: Gaze sensor 150: First camera 160: Second camera 170: Microphone 180: Speaker 200: Computer 210: Processor 220: Memory 230: Storage 240: Input/output interface 250: Communication interface 300: Controller 310: Grip 320: Frame 330: Top surface 340, 350, 370, 380: Button 360: Infrared LED
390: Analog stick 410: HMD sensor 420: Motion sensor 430: Display 510: Control module 520: Rendering module 530: Memory module 540: Communication control module 600: Server 700: External device 1561: Initial view image 1562: Reference position 1663 :logo

Claims (21)

means for obtaining virtual reality content embedded with watermark information;
A program for causing a computer to execute a means for reproducing the virtual reality content with the watermark information canceled,
The watermark information is obtained by reversibly converting at least part of information of the virtual reality content,
The reproducing means displays a view image that is part of the virtual reality content in a display area of an image display device,
A viewing area included in the viewing image of the virtual reality content changes according to a user's movement or operation on the image display device,
When the viewing area changes, the position of the watermark information in the display area changes,
A plurality of the watermark information is embedded in the virtual reality content at intervals narrower than the display area.
program. further causing the computer to execute means for acquiring a reference position associated with the coordinate system of the virtual reality content at a predetermined timing;
2. The program according to claim 1, wherein the reproducing means reproduces the virtual reality content in which the watermark information embedded in a position associated with the reference position has been canceled . further causing the computer to execute means for acquiring offset information associated with the reference position at a predetermined timing;
3. The program according to claim 2, wherein the reproducing means reproduces the virtual reality content in which the watermark information embedded at a position offset from the reference position is canceled based on the offset information. The program according to claim 3, wherein the offset position changes as the playback time of the virtual reality content passes. further causing the computer to execute means for acquiring cancellation information regarding a method for canceling the watermark information at a predetermined timing;
5. The program according to claim 1, wherein the reproducing means reproduces the virtual reality content with the watermark information canceled based on the cancellation information. The computer further includes means for acquiring, at a predetermined timing, cancellation information regarding a plurality of cancellation methods for canceling the watermark information and designation information specifying a specific cancellation method among the plurality of cancellation methods. let it run,
5. The virtual reality content according to claim 1, wherein the reproduction means reproduces the virtual reality content in which the watermark information has been canceled by the specific cancellation method based on the cancellation information and the specified information. Programs listed. 7. The program according to claim 6, wherein the designation information changes as the playback time of the virtual reality content passes. 8. The program according to claim 1, wherein the watermark information is embedded in the virtual reality content at a position or size that does not hinder viewing of the virtual reality content. 9. The program according to claim 1, wherein the watermark information is embedded in the virtual reality content in a predetermined shape to indicate the authentic origin of the virtual reality content. An information processing device,
means for obtaining virtual reality content embedded with watermark information;
means for reproducing the virtual reality content with the watermark information canceled;
The watermark information is obtained by reversibly converting at least part of information of the virtual reality content,
The reproducing means displays a view image that is part of the virtual reality content in a display area of an image display device,
A viewing area included in the viewing image of the virtual reality content changes according to a user's movement or operation on the image display device,
When the viewing area changes, the position of the watermark information in the display area changes,
An information processing apparatus , wherein a plurality of the watermark information is embedded in the virtual reality content at intervals narrower than the display area . a means for obtaining virtual reality content;
means for embedding watermark information in the virtual reality content;
A program for causing a computer to execute the means for distributing the virtual reality content,
The watermark information is obtained by reversibly converting at least part of information of the virtual reality content,
A view image that is part of the virtual reality content is displayed in a display area of an image display device,
A viewing area included in the viewing image of the virtual reality content changes according to a user's movement or operation on the image display device,
When the viewing area changes, the position of the watermark information in the display area changes,
A program , wherein a plurality of the watermark information is embedded in the virtual reality content at intervals narrower than the display area . further causing the computer to execute means for distributing a reference position associated with the coordinate system of the virtual reality content at a predetermined timing;
The program according to claim 11 , wherein the watermark information is embedded in a position associated with the reference position. further causing the computer to execute means for distributing offset information associated with the reference position at a predetermined timing;
The program according to claim 12 , wherein the watermark information is embedded in a position associated with the offset information. The program according to claim 13 , wherein the offset information changes as the playback time of the virtual reality content passes. The program according to any one of claims 11 to 14 , further causing the computer to execute means for distributing cancellation information regarding a method for canceling the watermark information at a predetermined timing. The computer further includes means for distributing cancellation information regarding a plurality of cancellation methods for canceling the watermark information and designation information specifying a specific cancellation method among the plurality of cancellation methods at a predetermined timing. The program according to any one of claims 11 to 14 , which is executed. 17. The program according to claim 16 , wherein the designation information changes as the playback time of the virtual reality content passes. 18. The program according to claim 11 , wherein the watermark information is embedded in the virtual reality content at a position or size that does not hinder viewing of the virtual reality content. 19. A plurality of the watermark information is embedded in the virtual reality content at intervals narrower than a display area of an image display device in which the virtual reality content is displayed. program. The program according to any one of claims 11 to 19 , wherein the watermark information is embedded in the virtual reality content in a predetermined shape to indicate the authentic origin of the virtual reality content. An information processing device,
a means for obtaining virtual reality content;
means for embedding watermark information in the virtual reality content;
means for distributing the virtual reality content;
The watermark information is obtained by reversibly converting at least part of information of the virtual reality content,
A view image that is part of the virtual reality content is displayed in a display area of an image display device,
A viewing area included in the viewing image of the virtual reality content changes according to a user's movement or operation on the image display device,
When the viewing area changes, the position of the watermark information in the display area changes,
An information processing apparatus , wherein a plurality of the watermark information is embedded in the virtual reality content at intervals narrower than the display area .

Images