WO2020141823A1 - Dispositif d'encapsulation de contenu de drm, système d'encapsulation de contenu de drm comprenant ledit dispositif et procédé d'encapsulation de contenu de drm - Google Patents

Dispositif d'encapsulation de contenu de drm, système d'encapsulation de contenu de drm comprenant ledit dispositif et procédé d'encapsulation de contenu de drm Download PDF

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Publication number
WO2020141823A1
WO2020141823A1 PCT/KR2019/018678 KR2019018678W WO2020141823A1 WO 2020141823 A1 WO2020141823 A1 WO 2020141823A1 KR 2019018678 W KR2019018678 W KR 2019018678W WO 2020141823 A1 WO2020141823 A1 WO 2020141823A1
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WIPO (PCT)
Prior art keywords
drm
packaging
content
decoding
qtc
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PCT/KR2019/018678
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English (en)
Korean (ko)
Inventor
신상호
김대수
박윤하
오재호
Original Assignee
재단법인 경주스마트미디어센터
주식회사우경정보기술
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Priority to JP2020573457A priority Critical patent/JP2021522759A/ja
Publication of WO2020141823A1 publication Critical patent/WO2020141823A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
    • H04N21/23892—Multiplex stream processing, e.g. multiplex stream encrypting involving embedding information at multiplex stream level, e.g. embedding a watermark at packet level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/124—Quantisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/85—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using pre-processing or post-processing specially adapted for video compression
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4627—Rights management associated to the content
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring

Definitions

  • the present invention relates to a DRM content packaging device and a DRM content packaging system and a DRM content packaging method including the DRM content packaging device capable of reducing the time and computational amount of DRM packaging regardless of the capacity of the video content.
  • DRM Digital Rights Management and is a general term for technology and service management systems and techniques for protecting the copyright of digital content. Recently, due to the rapid growth of digital content-related technology, the problems caused by illegal copying and unauthorized use of digital content have started to emerge, and the importance of DRM is recognized.
  • DRM packaging technology is to eradicate illegal copying and unauthorized use of content by inserting the copyright of a specific content into the content.
  • Existing technology can only be performed on H.264 (up to 4K 60FPS)-class content, and it is a detailed packaging technique. Uses mainly scrambling or symmetric/asymmetric key cryptographic algorithms.
  • An object of the present invention is to provide a DRM content packaging device and a DRM content packaging system and a DRM content packaging method including the DRM content packaging device capable of reducing the time and computational amount of DRM packaging regardless of the capacity of the video content.
  • a decoding module for decoding video content using a CABAC decoder Selecting QTC (Quantized Transform Coefficients) data among data derived as a result of decoding by the decoding module, inserting a bitstream of the selected QTC data and a bitstream of DRM metadata to perform DRM packaging DRM content packaging module; And an encoding module for encoding the video frame on which the DRM packaging is performed using a CABAC encoder.
  • QTC Quadratized Transform Coefficients
  • the DRM content packaging module is a bit of QTC present in a Y channel expressing luminance among YCbCr channels included in a video frame for realizing a video image of the video content It is characterized in that DRM packaging is performed by inserting operations on a stream and a bitstream of DRM metadata.
  • the insertion operation may be an XOR operation.
  • a communication unit performing wired/wireless communication with a user terminal includes a control unit for decoding video content using a CABAC decoder, packaging DRM metadata in QTC data derived through decoding, and encoding DRM metadata packaging completed video content.
  • the control unit a decoding module for decoding the video content using a CABAC decoder;
  • a DRM content packaging module that selects QTC data among data derived as a result of decoding by the decoding module and performs DRM packaging by inserting and calculating a bitstream of the selected QTC data and a bitstream of DRM metadata;
  • an encoding module for encoding the video frame on which the DRM packaging is performed using a CABAC encoder.
  • the DRM content packaging module includes QTCs present in a Y channel expressing luminance among YCbCr channels included in a video frame implementing a video image of the video content It is characterized in that packaging is performed by performing an insertion operation on at least one bitstream of QTC and DRM metadata.
  • the insert operation may be an XOR operation.
  • the step of packaging the DRM metadata selects QTC data among data derived in the decoding step, and selects a bitstream and DRM metadata of the selected QTC data. It is characterized in that DRM packaging is performed by inserting a bitstream.
  • the step of packaging the DRM metadata is present in a Y channel expressing luminance among YCbCr channels included in a video frame for realizing a video image of the video content It is characterized by packaging by performing an insert operation on at least one of the QTC bitstream and the DRM metadata bitstream.
  • the insertion operation may be an XOR operation.
  • FIG. 1 and 2 are block diagrams illustrating a DRM content packaging system according to an embodiment of the present invention.
  • FIG. 3 is a block diagram showing a control unit configuration of the DRM content packaging management server according to an embodiment of the present invention.
  • FIG. 5 is a diagram schematically illustrating a DRM packaging process according to an embodiment of the present invention.
  • FIG. 6 is a diagram schematically illustrating a DRM unpackaging process according to an embodiment of the present invention.
  • FIG. 7 to 9 are flowcharts illustrating an operation process of a DRM content packaging system according to an embodiment of the present invention.
  • FIG. 10 is a flowchart illustrating a DRM content packaging method according to an embodiment of the present invention.
  • FIG. 11 is a diagram illustrating a computing device according to an embodiment of the present invention.
  • FIG. 1 and 2 are block diagrams illustrating a DRM content packaging system according to an embodiment of the present invention.
  • the DRM content packaging system includes a user terminal 100 and a DRM content packaging management server (200, hereinafter also referred to as a DRM server).
  • FIG. 1 shows a case in which the DRM server 200 stores a plurality of DB contents by itself
  • FIG. 2 shows an external content provider (Contents Provider, CP1 to CP3) separately as the DRM server 200 It shows a case where video content is provided.
  • the video content that is the target of DRM packaging is not particularly limited, but it can be more usefully utilized for large-capacity high-definition video content.
  • High-capacity high-definition video content for example, virtual reality content (VR content), augmented reality content (AR content), interactive content, etc., HEVC (High Efficiency Video Codec)-based 4K 120FPS (Frame Per Second) class realistic content
  • VR content virtual reality content
  • AR content augmented reality content
  • HEVC High Efficiency Video Codec
  • 120FPS Framework Per Second
  • 120FPS-class content it can be applied without limitation to various levels of content, such as 60-120FPS-class content, 120-240FPS-class content.
  • the user terminal 100 refers to a terminal capable of transmitting and receiving various data to and from the DRM server 200 via a wired or wireless communication network according to a user's key operation, and a personal computer (PC), a laptop computer, and a personal portable information terminal.
  • PC personal computer
  • laptop computer a laptop computer
  • personal portable information terminal a personal portable information terminal.
  • PDA Personal Digital Assistant
  • Mobile Communication Terminal can be any one, and a web browser for accessing the DRM server 200 via a wired or wireless communication network and a memory for storing a program, a program
  • a program Refers to a terminal equipped with a microprocessor or the like to execute, operate, and control.
  • the user may make a request for transmission (download request) for specific video content to the DRM server 200 through the user terminal 100.
  • the DRM server 200 When the DRM server 200 receives a request to transmit a specific video content from the user terminal 100, the DRM server 200 is packaged in the DRM and transmitted to the user terminal 100.
  • the DRM server 200 may store and store a plurality of DRM contents in advance, and when the DRM server 200 receives a transmission request for a specific image content from the user terminal 100, the DRM server 200 corresponds to the corresponding DRM-packaged image contents.
  • the video content may be selected and transmitted to the user terminal 100.
  • the DRM server 200 may include a communication unit 210, a control unit 220, and a storage unit 230.
  • the communication unit 210 is a communication means that performs a function of interworking with the user terminal 100 and external content providers CP1 to CP3 via a wired or wireless communication network, and performs a function of transmitting and receiving various data.
  • the storage unit 230 stores various data and programs necessary for driving the DRM server 200. According to an embodiment, the storage 230 may store a plurality of image contents that have not been DRM packaged or a plurality of image contents that have been previously DRM packaged. Alternatively, the storage unit 230 may store a plurality of image contents previously DRM packaged by external content providers CP1 to CP3.
  • the control unit 220 controls the overall function of the DRM server 200 and performs DRM packaging processing on the video content.
  • the controller 220 may process the DRM packaging of the corresponding video content in response to the transmission request of the user terminal 100, or the DRM packaging of the plurality of video contents in advance regardless of the transmission request of the user terminal 100, and the storage unit 230 ).
  • the control unit 220 may include a decoding module 221, a DRM content packaging module 222, and an encoding module 223.
  • Each of the modules 221 to 223 is a component that performs a predetermined function, and may be implemented by hardware, software, or a combination of hardware and software.
  • the modules 221 to 223 may mean a program module, which may be software components that are executed by a processor and perform a predetermined function.
  • the decoding module 221 decodes video content.
  • the decoding module 221 may be a context-based adaptive binary arithmetic code (CABAC) decoder that performs a binary arithmetic decoding method that adaptively decodes according to surrounding conditions.
  • CABAC context-based adaptive binary arithmetic code
  • the derived data is quantized transform coefficients (hereinafter referred to as QTC), general control data, internal prediction data, filter control data, and motion data ( Motion Data).
  • the DRM content packaging module 222 selects QTC data from data derived as a result of decoding by the CABAC decoder, and performs DRM packaging by performing insertion operations on DRM metadata and QTC data for some regions in the QTC data .
  • the insert operation can be, for example, an XOR operation.
  • the insertion operation is described as performing an XOR operation, but is not limited thereto.
  • the DRM content packaging module 222 performs DRM packaging by performing an XOR operation on some bitstreams of each QTC belonging to one video frame.
  • Each video frame includes an RGB channel expressing natural color, a YCbCr channel expressing luminance/chrominance components, and encoding RGB information.
  • Each video frame represents one video image using several channels.
  • the DRM content packaging module 222 performs DRM packaging using QTC existing in the YCbCr channel, which is one of the channels representing a video image. More specifically, the DRM content packaging module 222 performs XOR operation on the bitstream of at least one QTC and DRM metadata among the QTCs present in the Y channel expressing luminance among the YCbCr channels to package them.
  • the DRM content packaging module 222 selects a YCbCr channel from among multiple channels, selects some QTCs in the Y channel expressing luminance among the YCbCr channels, and corresponds to at least one bitstream of the Y channel QTC DRM packaging is performed by performing an XOR operation on the DRM metadata bitstream of the location.
  • the Y channel is basic black and white image information, and a Cb channel and a Cr channel are generated with reference to the Y channel. At this time, a color image of the same quality as the original or a relatively deteriorated quality compared to the original is generated through lossless or lossy compression according to the generated method.
  • DRM packaging is performed only on the Y channel using this principle of YCbCr. That is, if packaging is performed for only the Y channel, the Cb channel and the Cr channel, which are channels generated by referring to this, are automatically packaged.
  • the packaging operation amount and time required are increased.
  • DRM packaging is a technique that increases the distortion of the image so that unauthorized users cannot view the image, so it can be considered that the distortion of the packaged image is increased compared to the original. Therefore, DRM packaging by the DRM content packaging module 222 is preferably performed on the QTC in the Y channel among the YCbCr channels.
  • the encoding module 223 encodes an image frame in which DRM packaging has been performed to generate DRM packaged image content.
  • the encoding module 223 may be a CABAC encoder that performs a binary arithmetic encoding method that adaptively performs encoding according to surrounding conditions.
  • modules 221 to 223 are described as components constituting the control unit 220 of the DRM server 200, they do not necessarily function as the control unit 220 of the DRM server 200, but a unique device. It may be implemented as. That is, the functions of the modules 221 to 223 may be implemented as an independent DRM content packaging device.
  • FIG. 4 illustrates a process of inserting DRM metadata into a region selected in the QTC and a region selected during the DRM packaging process, and one QTC is divided into four regions according to a signal frequency distribution of a corresponding image.
  • the four regions are represented by LL (Low Low), LH (Low High), HL (High Low) and HH (High High), and the MSB (Most Significant Bit) of the four regions: the bit of the largest digit, that is, the leftmost bit )
  • One bit or more bits are selected and XORed with the corresponding DRM metadata bitstream to perform DRM packaging.
  • this XOR operation is not necessarily limited to 1 bit of MSB and 2 or more bits including the same.
  • LSB east Significant Bit: Least Significant Bit, that is, the rightmost bit
  • the DRM packaging process illustrated in FIG. 4 illustrates the result of performing the XOR operation on 2 bits of the MSB and 2 bits of the DRM metadata bitstream in the pixel.
  • FIG. 5 is a diagram schematically illustrating a DRM packaging process according to an embodiment of the present invention.
  • Part A of FIG. 5 exemplifies the HEVC-based sensational content generated through the HEVC encoding procedure in each CTU (Coding Tree Unit) process determined as the current standard.
  • CTU Coding Tree Unit
  • part B illustrates a DRM packaging process according to an embodiment of the present invention, and a series of processes performed by the decoding module 221 and the DRM content packaging module 222 and the encoding module 223
  • the decoding module 221 performs the B1 operation
  • the DRM content packaging module 222 performs the B2 operation
  • the encoding module 223 performs the B3 operation.
  • video content C in which DRM metadata is packaged in the QTC data area is generated.
  • the DRM unpackaging process is a reverse DRM packaging process, as shown in FIG. 6.
  • the DRM packaging-completed video content for example, HEVC video file
  • the legitimate user After performing an XOR operation with a DRM metadata bitstream owned by (Legal Subscriber) to obtain an unpackaged QTC, data is transmitted and processed in an HEVC decoding process.
  • the real user unpacks the downloaded or streamed video data in real time, so it is possible to watch the original video without delay.
  • FIG. 7 to 9 are flowcharts illustrating an operation process of a DRM content packaging system according to an embodiment of the present invention.
  • FIG. 7 is a system in which the DRM server 200 provides DMR packaged video content in a real-time streaming method when there is a request for video content transmission from the user terminal 100.
  • the user requests transmission of a specific video content to the DRM server 200 through the user terminal 100.
  • the DRM server 200 requests and receives the video content from the corresponding video content provider (CP).
  • the DRM server 200 transmits the video content to the user terminal 100 in real time by performing DMR packaging (S140).
  • S150 In the process, if the DRM server 200 stores video content by itself, steps S120 to S130 may be omitted.
  • DMR packaging 8 and 9 are DMR packaging and storing a plurality of unspecified image contents in advance before there is a request to transmit image contents from the user terminal 100, and then, when there is a transmission request through the user terminal 100, DMR packaging in advance 8 is a system for transmitting DMR packaging in advance in the DRM server 200, and FIG. 9 is a case in which the DMR packaging is processed in advance by the video content provider CP.
  • the DRM server 200 requests and receives video content from a video content provider (CP).
  • CP video content provider
  • the DRM server 200 stores the video content through DMR packaging processing.
  • S230 When there is a request for transmitting video content from the user terminal 100 (S240), the DRM server 200 transmits the video content to the user terminal 100 when the corresponding video content is previously DMR packaged. .
  • S250 If the video content that is not DMR packaged is requested, the process of FIG. 7 is performed.
  • the video content provider CP itself performs DMR packaging processing (S320) and transmits the video content to the DRM server 200. .
  • S320 DMR packaging processing
  • S330 DMR packaging processing
  • S340 DRM server 200 transmits the video content to the user terminal 100.
  • FIG. 10 is a flowchart illustrating a DRM content packaging method according to an embodiment of the present invention.
  • the video content is not particularly limited, but can be more usefully used for large-capacity high-definition video content.
  • High-capacity high-definition video content for example, virtual reality content (VR content), augmented reality content (AR content), interactive content, etc., HEVC (High Efficiency Video Codec) based 4K 120FPS (Frame Per Second) class realistic content
  • VR content virtual reality content
  • AR content augmented reality content
  • HEVC High Efficiency Video Codec
  • 120FPS-class content it can be applied without limitation to various levels of content, such as 60-120FPS-class content, 120-240FPS-class content.
  • decoding is performed on the received video content using a CABAC decoder.
  • S20 When decoding video content with a CABAC decoder, five types of data are derived for each video frame.
  • the data to be derived are QTC, general control data, internal prediction data, filter control data, and motion data.
  • QTC data is selected from data derived as a result of decoding by the CABAC decoder, and DRM packaging is performed by performing XOR operation on DRM metadata and QTC data on some areas in the QTC data.
  • a YCbCr channel is selected from among multiple channels present in each video frame, a portion of the YCbCr channels is selected from a portion of the Y channel representing luminance, and at least one of the Y channel QTC is selected.
  • DRM packaging is performed by performing an XOR operation on the bitstream and the DRM metadata bitstream at the corresponding position.
  • the DRM-packaged video content is generated by encoding the DRM-packaged video frame with a CABAC encoder.
  • the DRM content packaging method and the DRM content packaging system since an operation for DRM packaging is processed only for luminance channel data in an image frame, the computation amount and the amount of computation compared to the capacity increase of the image content This has the effect of significantly shortening the calculation processing time. In fact, regardless of the capacity of the video content, the calculation amount and the processing time are constant, which is very effective in performing DRM packaging for large-capacity high-definition video content (for example, HEVC-based 4K 120FPS-class realistic content). . In addition, it is possible to provide more stability than the conventional DRM packaging technique with a smaller computational amount than the conventional one.
  • the computing device TN100 of FIG. 11 may be a device (eg, a DRM content packaging device, a DRM content packaging management server, etc.) described herein.
  • the computing device TN100 may include at least one processor TN110, a transmission/reception device TN120, and a memory TN130. Further, the computing device TN100 may further include a storage device TN140, an input interface device TN150, an output interface device TN160, and the like. The components included in the computing device TN100 may be connected by a bus TN170 to communicate with each other.
  • the processor TN110 may execute a program command stored in at least one of the memory TN130 and the storage device TN140.
  • the processor TN110 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor in which methods according to an embodiment of the present invention are performed.
  • the processor TN110 may be configured to implement procedures, functions, and methods described in connection with embodiments of the present invention.
  • the processor TN110 may control each component of the computing device TN100.
  • Each of the memory TN130 and the storage device TN140 may store various information related to the operation of the processor TN110.
  • Each of the memory TN130 and the storage device TN140 may be configured as at least one of a volatile storage medium and a non-volatile storage medium.
  • the memory TN130 may be configured as at least one of read only memory (ROM) and random access memory (RAM).
  • the transmitting and receiving device TN120 may transmit or receive a wired signal or a wireless signal.
  • the transmitting and receiving device TN120 may be connected to a network to perform communication.
  • the present invention may be implemented as a computer program.
  • the present invention can be implemented as a computer program stored in a computer-readable recording medium in order to execute the DRM content packaging method according to the present invention in combination with hardware.
  • Methods according to an embodiment of the present invention may be implemented in a form of a program readable through various computer means and recorded in a computer-readable recording medium.
  • the recording medium may include a program command, a data file, a data structure, or the like alone or in combination.
  • the program instructions recorded on the recording medium may be specially designed and configured for the present invention, or may be known and available to those skilled in computer software.
  • the recording medium includes magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CDROMs and DVDs, and magneto-optical media such as floptical disks.
  • magnetic media such as hard disks, floppy disks, and magnetic tapes
  • optical media such as CDROMs and DVDs
  • magneto-optical media such as floptical disks.
  • optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like.
  • Examples of program instructions may include machine language such as those produced by a compiler, as well as high-level languages that can be executed by a computer using an interpreter or the like.
  • Such a hardware device may be configured to operate as one or more software modules to perform the operation of the present invention, and vice versa.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La présente invention concerne un dispositif d'encapsulation de contenu de DRM, un système d'encapsulation de contenu de DRM comprenant ledit dispositif et un procédé d'encapsulation de contenu de DRM, pouvant réduire le temps et la quantité de calculs dont a besoin l'encapsulation de DRM, indépendamment de la taille d'un contenu d'image. Le dispositif d'encapsulation de contenu de DRM selon un mode de réalisation de la présente invention comprend : un module de décodage permettant de décoder un contenu d'image à l'aide d'un décodeur CABAC ; un module d'encapsulation de contenu de DRM qui réalise une encapsulation de DRM par sélection, à partir de données dérivées à l'aide du résultat du décodage par le module de décodage, de données de coefficient de transformée quantifié (QTC) et par réalisation d'un calcul XOR sur un train de bits des données QTC sélectionnées et sur un train de bits de métadonnées DRM ; et un module de codage permettant de coder, à l'aide d'un codeur CABAC, une trame d'image sur laquelle une encapsulation de DRAM a été réalisée.
PCT/KR2019/018678 2018-12-31 2019-12-30 Dispositif d'encapsulation de contenu de drm, système d'encapsulation de contenu de drm comprenant ledit dispositif et procédé d'encapsulation de contenu de drm WO2020141823A1 (fr)

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JP2020573457A JP2021522759A (ja) 2018-12-31 2019-12-30 Ｄｒｍコンテンツパッケージング装置及びそれを含むｄｒｍコンテンツパッケージングシステム及びｄｒｍコンテンツパッケージング方法

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KR10-2018-0173650 2018-12-31
KR1020180173650A KR102186480B1 (ko) 2018-12-31 2018-12-31 Drm 콘텐츠 패키징 장치 및 이를 포함하는 drm 콘텐츠 패키징 시스템 및 drm 콘텐츠 패키징 방법

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KR102477310B1 (ko) * 2020-12-29 2022-12-12 재단법인 경주스마트미디어센터 Drm 콘텐츠 병렬 패키징 장치 및 이를 포함하는 drm 콘텐츠 병렬 패키징 시스템 및 drm 콘텐츠 병렬 패키징 방법

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