KR102110163B1 - System and method for managing watermark in virtual reality contents using blockchain network - Google Patents

Abstract

Disclosed is a watermark management system and method for VR (Virtual Reality) content using a blockchain. A watermark management system for VR content according to the present invention includes: a node connected to a blockchain network and generating a block for recording transactions on the blockchain network; When authoring VR content, insert the address information created using the unique address value assigned from the blockchain network and key frame information of the VR content, and a watermark for copyright protection of the VR content into the VR content, and produce the VR content A producer terminal that controls a transaction corresponding to an action to be recorded in a block of the blockchain network; When playing VR content, control to record transactions corresponding to the behavior of playing VR content in blocks of the blockchain network, restore address information using watermarks embedded in VR content, and restore values and information about viewers It may include; a user terminal having a viewer for transmitting the verification information, including to the blockchain network.

Description

System and method for managing watermark of VR content using blockchain {System and method for managing watermark in virtual reality contents using blockchain network}

The present invention relates to a method for managing the distribution process of VR (Virtual Reality) content using a blockchain network, and more specifically, it is illegal to monitor whether or not a watermark inserted into VR content is tampered with using a blockchain. A method for preventing the use of VR content and a system therefor.

Damage to copyright is caused by unauthorized copying and editing of digital content such as VR content.

In order to solve this problem, recently, a technology has been started to study the act of copying and distributing digital contents with a blockchain so that the copyright can be fully distributed to true authors.

However, if a watermark is inserted into the video content, there may be a problem that is visually disturbing, and when a watermark is inserted so as not to obscure the view, the watermark is deleted or duplicated in the same way. There is a limit that it is possible to falsify.

In particular, YouTubers and content creators such as BJ (Broadcasting Jockey) generate profits in proportion to the number of views of the video, and if the content is copied and distributed without permission, economic loss occurs. This can cause the image to be lost.

The present invention is to solve the above problems, by effectively inserting the watermark of the VR content and managing it through a blockchain network, it is possible to prevent forgery or illegal copying by fundamentally preventing the forgery of the VR content. It aims to provide a management system and method.

In order to achieve the above object, a watermark management system for VR content using a blockchain according to an embodiment of the present invention is connected to a blockchain network, and a node for generating a block recording a transaction on the blockchain network. ; When authoring VR (Virtual Reality) content, the address information generated by using the unique address value assigned from the blockchain network and the keyframe information of the VR content, and the watermark for copyright protection of the VR content are the VR content. A producer terminal that controls a transaction corresponding to a production activity of the VR content to be recorded in a block of the blockchain network; When the VR content is played back, the transaction corresponding to the playing action of the VR content is controlled to be recorded in a block of the blockchain network, the address information is restored using the watermark inserted in the VR content, and the restored value And a user terminal having a viewer that transmits verification information including information about the viewer to the blockchain network.

The producer terminal may insert the watermark into frames that are regularly spaced forward or backward from each keyframe of the VR content, but divide and insert the watermark into both channels of the corresponding frame.

The node may determine whether to falsify the VR content by analyzing verification information received from the viewer of the user terminal.

If the unique address value does not exist in the verification information received from the viewer of the user terminal during the VR content playback, the node determines that the VR content is forged and contains a keyframe that does not include a watermark, and processes an exception. You can do it,

When the unique address value included in the verification information received from the viewer of the user terminal is changed while the VR content is being played, the node determines that the VR content is forged and includes a different watermark in a single file, and handles exception processing. It can be done.

The node may analyze the verification information received from the viewer of the user terminal during playback of the VR content, and if the VR content has an irrecoverable watermark, determine that the VR content has been forged and perform exception processing. .

According to an embodiment of the present invention, a method of managing a watermark of VR (Virtual Reality) content by a node that is connected to a blockchain network and generates a block that records a transaction on the blockchain network is based on a request from the producer terminal. A production step of allocating a unique address value on the blockchain network to the newly created VR content, and recording a transaction corresponding to the production behavior of the VR content in a block of the blockchain network; In response to a request from a viewer playing the VR content, a transaction corresponding to the playing action of the VR content is recorded in a block of the blockchain network, and the watermark inserted by the viewer into the VR content during playback of the VR content It may include; receiving and analyzing the verification information generated by using to determine whether the forgery of the VR content.

According to the present invention, the entire process of production and distribution of VR content can be managed using a blockchain network.

In addition, if an unauthorized person arbitrarily edits or modifies the distributed VR content, the inserted watermark is tampered with. According to the present invention, it is possible to grasp this falsification fact through verification information collected from the viewer and to process a predetermined exception. .

In addition, according to the present invention, when the VR content is distributed without permission, it is also possible to simply grasp through the transaction book of the blockchain, thereby not only protecting digital works, but also fair distribution of the copyright to true authors.

In addition, according to the present invention, when randomly edited or modified VR content is illegally copied, distributed, and streamed, any viewers playing it transmit information to the blockchain network, so actors who copy or distribute it without permission Even neutralizing the DRM means is of no use, and accordingly, the complete protection of VR content is possible.

1 is a diagram for explaining a network configuration of a watermark management system for VR content using a blockchain according to an embodiment of the present invention.
2 is a diagram for explaining a method of embedding a watermark in VR content according to an embodiment of the present invention.
3 is a flowchart illustrating a method for managing watermark of VR content using a blockchain according to an embodiment of the present invention.

Terms used in the specification will be briefly described, and the present invention will be described in detail.

The terminology used in the present invention has been selected, while considering the functions in the present invention, general terms that are currently widely used are selected, but this may vary according to the intention or precedent of a person skilled in the art or the appearance of a new technology. In addition, in certain cases, some terms are arbitrarily selected by the applicant, and in this case, their meanings will be described in detail in the description of the applicable invention. Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the contents of the present invention, not simply the names of the terms.

When a part of the specification "includes" a certain component, this means that other components may be further included instead of excluding other components, unless specifically stated to the contrary. In addition, terms such as "... means", "... part", and "module" described in the specification mean a unit that processes at least one function or operation, which is implemented in hardware or software, or hardware and software. It can be implemented as a combination of.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

Blockchain is a decentralized data storage technology that connects data to blocks in the form of a chain and replicates and stores them simultaneously on numerous computers. This is because the transaction records are sent to all users participating in the transaction without storing the transaction records on the centralized server, and every transaction participant shares information with each transaction so that data cannot be forged or tampered with.

If there is a transaction between A and B, the corresponding transaction block is generated and transmitted to all participants on the network. As a result, mutual verification of the information on this block is completed and combined in the chain. If a cryptocurrency transfer transaction between A and B occurs in the cryptocurrency blockchain, the transfer details including the cryptocurrency address and transfer amount of the trading parties will also be recorded in the block.

1 is a diagram for explaining a network configuration of a watermark management system for VR content using a blockchain according to an embodiment of the present invention.

The blockchain network 100 maintains and manages a network of individual servers participating in a transaction without storing or managing transaction records in a centralized server. This individual server, or participant, is called a node. Nodes are connected to the blockchain network to create blocks that record transactions on the blockchain network.

Since there is no central administrator, the role of the node that distributes the block is important, and more than half of the participating nodes must have consent to create a new block. Nodes store the transaction history, that is, the block chain in which transactions are recorded, on a computer, but some nodes are hacked, and even if the existing contents are corrupted, data remains in multiple nodes, so that the data can be continuously preserved.

Each node of the blockchain network 100 calculates the hash value of the entire ledger in the Merkle Tree, verifies whether the corresponding transaction is forged, and performs a role of mining the block in which the transaction is recorded and adding it to the blockchain. It is a mining agent that is paid a fee according to.

The producer terminal 110 with the authoring tool 111 which is a means for generating VR content and / or the user terminal 120 with the viewer 121 which is a means for reproducing distributed VR content is a blockchain. It can operate as a node participating in the network 100. In this case, the producer terminal 110 and / or the user terminal 120 may directly access the blockchain network 100 to execute a smart contract related to management of VR contents according to the present invention.

However, in order to operate as a node of the blockchain network, the block data must be continuously downloaded and synchronized, so the producer terminal 110 and / or the user terminal 120 do not directly store the blockchain data having a very large capacity and sort of it. Smart contracts related to VR content management according to the present invention can be used by connecting to a node serving as a server.

In this case, the producer terminal 110 and / or the user terminal 120 may access the blockchain network 100 using a remote procedure call through a web browser or a predetermined access service. Smart contracts created by users on the network are recorded in blocks, and the corresponding code is copied to other nodes, so that the smart contracts can be executed in the virtual machines of each node.

According to the smart contract, the node of the blockchain network 100 records each of the production, copying, and replaying actions of VR content in a book with a blockchain transaction and performs necessary procedures accordingly. When the VR content is first authored, a unique address on the blockchain network is assigned, and when the viewer 121 plays the VR content, a transaction of a type corresponding to the replay action is recorded in the corresponding wallet address of the blockchain book. The viewer 121 reads the watermark while playing VR content to generate verification information and provides it to the blockchain network.

The node of the blockchain network 100 determines whether the watermark is tampered with verification information actively provided by the viewer 121 according to the smart contract, that is, whether the VR content has been illegally arbitrarily edited, modified, or distributed without permission. Can be.

When authoring VR content, the producer terminal 110 uses the unique address value allocated from the blockchain network 100 and the address information generated using keyframe information of the VR content and a watermark for copyright protection of the VR content. It can be controlled to be inserted into the content and the transaction corresponding to the production behavior of the VR content is recorded in the block of the blockchain network 100.

The user terminal 120 is provided with a viewer 121, and the viewer 121 controls to record a transaction corresponding to an act of playing VR content in a block of the blockchain network 100 when VR content is played, and VR content The address information embedded in the content may be restored using the watermark embedded in the content, and verification information including the restored value and information about the viewer itself may be transmitted to the blockchain network 100. The node may determine whether to falsify VR content by analyzing this verification information received from the viewer 121 of the user terminal 120.

2 is a diagram for explaining a method of embedding a watermark in VR content according to an embodiment of the present invention.

The authoring tool 111 inserts a watermark when authoring VR content, that is, when it is first created. The VR content consists of two channels (left and right or up and down), and the watermark can be dividedly inserted into both channels of each key frame 210. A part 230 of the watermark is inserted into the first channel, and the rest 240 of the watermark is inserted into the second channel.

Preferably, by dividing and inserting watermarks into both channels of the frame 220 which are regularly spaced forward or backward from each keyframe 210, it is possible to avoid deterioration in image quality and make the watermark invisible. For example, a watermark is inserted by inserting it into the second frame from each keyframe. If a watermark is inserted into a frame other than a keyframe, the watermark is not noticeable during playback because it is not only a keyframe, but also passes by 1/30 second when playing the screen. There is also an advantage that it is difficult to find a watermark even if you try to flip or edit it in key frame units.

3 is a flowchart illustrating a method for managing watermark of VR content using a blockchain according to an embodiment of the present invention.

In step S31, the address value on the blockchain network is uniquely assigned when authoring VR content, that is, when it is first created. In the generated VR content, address information generated using the assigned unique address value and key frame information and a watermark for copyright protection will be inserted. The insertion of the address information may be performed by calculating the corresponding address value and key frame information according to a predetermined predetermined arithmetic expression and dividing it into both channels of the key frame.

In step S32, the production transaction of the VR content is recorded in the blockchain network at the request of the producer terminal 110 who authored the VR content. Accordingly, information indicating that VR content having a unique address value on the blockchain network as identification information has been generated and started to be distributed can be shared with all nodes participating in the blockchain network.

In step S33, when the VR content is played by the viewer 121, a playback transaction of the VR content is recorded in the blockchain network at the request of the viewer 121. Accordingly, information indicating that the VR content using the unique address value on the blockchain network as the identification information has been played at a specific time by the specific viewer 121 may be shared with all nodes participating in the blockchain network.

In step S34, verification information received from the viewer 121 during playback of the VR content is analyzed to determine whether the VR content being played is forged. The verification information received from the viewer 121 may include a value obtained by restoring the address information using a watermark embedded in VR content and information about the viewer.

The viewer 121 may restore address information including a specific address value of the blockchain network by combining watermarks divided into both channels of VR content and restoring them through a predetermined predetermined expression. The viewer 121 may transmit a flag indicating whether it is streaming or playing after copying, in addition to address information restored using a predetermined arithmetic expression and identification information about the viewer itself as verification information when playing VR content. .

From the start of playback of the VR content to the end of the playback, a playback transaction is generated once and stored at the corresponding address on the blockchain network, but the verification information transmitted by the viewer 121 is periodically received as long as the keyframe exists, and whenever it is VR It is possible to check whether the contents are forged or forged.

In step S35, when it is determined that the VR content is forged, a predetermined exception handling is performed. The forgery type and exception handling of VR content will be described in detail below.

If the unique address value does not exist in the verification information received from the viewer 121 during VR content playback, it is determined that the VR content is forged and that there is a keyframe that does not include a watermark in the middle, and exception processing is performed. It is possible to identify which VR content is falsified through information immediately before or after received from the corresponding viewer, and which viewer plays the content through viewer information (for example, an IP address). For the exception processing, the forgery-related information obtained as described above can be recorded and shared on the blockchain and can be notified to a predetermined external device.

When the unique address value included in the verification information received from the viewer 121 is changed during VR content playback, it is determined that the VR content is forged and contains a different watermark in a single file, and exception processing is performed. If a different address value is suddenly interrupted while receiving verification information from the viewer 121, the streaming session is not newly established and is forged if the existing file is not unloaded and the new file is loaded and played. It can be judged by content.

When the verification information received from the viewer 121 is analyzed during VR content playback, if the VR content has an irrecoverable watermark, it is determined that the VR content has been forged and performs exception processing. If the watermark corresponding to an arbitrary key frame is copied and edited illegally and then copied into each key frame of the processed VR content, it is possible to determine the forged VR content because address information cannot be restored during playback. .

Even in the case of VR content whose watermark is completely erased, the viewer 121 informs the blockchain network that it is playing it according to the header information, and the node of the blockchain network can judge the forged VR content and handle exceptions. have.

As such, the production and distribution of VR content can be managed using a blockchain network. If the unauthorized VR content is edited or modified by an unauthorized person, the inserted watermark is tampered with, and the producer or copyright holder is notified by grasping the falsification through verification information collected from the viewer 121, and on the blockchain network. Exception handling such as recording of falsification facts is possible.

The method according to an embodiment of the present invention may be implemented in the form of program instructions that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded on the medium may be specially designed and configured for the present invention, or may be known and available to those skilled in computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROMs, DVDs, and magnetic media such as floptical disks. -Hardware devices specifically configured to store and execute program instructions such as magneto-optical media, and ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter, etc., as well as machine language codes produced by a compiler.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (10)

A node connected to the blockchain network to generate a block for recording transactions on the blockchain network;
When authoring VR (Virtual Reality) content, the address information generated by using the unique address value assigned from the blockchain network and the keyframe information of the VR content, and the watermark for copyright protection of the VR content are the VR content. A producer terminal to control the transaction to be recorded in a block of the blockchain network, inserted into the block, and corresponding to a production activity of the VR content;
When the VR content is played back, the transaction corresponding to the playing action of the VR content is controlled to be recorded in a block of the blockchain network, the address information is restored using the watermark inserted in the VR content, and the restored value And a user terminal having a viewer that transmits verification information including information about the viewer to the blockchain network.
The VR content is authored in two channels by the producer terminal,
The watermark is inserted into a frame that is regularly spaced forward or backward from each keyframe of the VR content,
The watermark is dividedly inserted into each channel of the corresponding frame,
When the VR content is played by the user terminal, the watermarks divided and inserted into each channel are combined and restored through a predetermined predetermined expression,
It is determined whether the forgery of the verification information including the watermark restored by the node, the watermark management system of VR content using a blockchain. delete delete According to claim 1,
The node,
If the unique address value does not exist in the verification information received from the viewer of the user terminal while playing the VR content, it is determined that the VR content is forged and there is a key frame that does not include a watermark, and exception processing is performed. The watermark management system for VR contents using blockchain. According to claim 1,
The node,
When the unique address value included in the verification information received from the viewer of the user terminal is changed during the VR content playback, it is determined that the VR content is falsified and that a different watermark is included in a single file, and exception processing is performed. The watermark management system for VR contents using blockchain. According to claim 1,
The node,
A block characterized by analyzing the verification information received from the viewer of the user terminal while playing the VR content and determining that the VR content has been forged and performing exception processing when the VR content has an irrecoverable watermark. Watermark management system for VR contents using a chain. A method of managing a watermark of VR (Virtual Reality) content by a node that is connected to a blockchain network and creates a block that records transactions on the blockchain network,
A production step of allocating a unique address value on the blockchain network to newly created VR content according to a request from a producer terminal, and recording a transaction corresponding to a production activity of the VR content in a block of the blockchain network;
In response to a request from a viewer of the user terminal playing the VR content, a transaction corresponding to the playing action of the VR content is recorded in a block of the blockchain network, and the viewer inserts the VR content during playback of the VR content Includes; receiving and analyzing the verification information generated by using the watermark to determine whether the forgery of the VR content; includes
The VR content is authored in two channels by the producer terminal,
The watermark is inserted into a frame that is regularly spaced forward or backward from each keyframe of the VR content,
The watermark is dividedly inserted into each channel of the corresponding frame,
When the VR content is played by the user terminal, the watermarks divided and inserted into each channel are combined and restored through a predetermined predetermined expression,
A method for managing watermark of VR content using a blockchain, characterized in that it is determined whether or not the verification information including the watermark restored by the node is forged. delete The method of claim 7,
In the generated VR content, address information generated using unique address values and key frame information allocated from the blockchain network and a watermark for copyright protection are inserted,
The verification information received from the viewer of the user terminal includes a value obtained by restoring the address information using a watermark embedded in the VR content and information about the viewer, using a blockchain How to manage watermark of VR content. The method of claim 7,
The regeneration step,
If a unique address value does not exist in the verification information received from the viewer of the user terminal while playing the VR content, determining that there is a key frame that does not include a watermark because the VR content is forged and performing exception processing; ;
If the unique address value included in the verification information received from the viewer of the user terminal is changed during the playback of the VR content, determining that the VR content is forged and containing a different watermark in a single file, and performing exception processing; ;
And analyzing the verification information received from the viewer of the user terminal during playback of the VR content and determining that the VR content has been forged and performing an exception processing if the VR content has a watermark that cannot be restored. Characterized by, a method for managing watermark of VR content using a blockchain.

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