Video encoding device and decoding device

Abstract

To solve a problem in which, using generative AI can implement image processing using text information provided by prompts, however, when attempting to perform full-scale post-image processing, the amount of information required becomes enormous, as not only the prompts but also the number of models and control parameters required to define the processing increases, posing a challenge.SOLUTION: A video decoding device according to the present invention includes: an image decoding device that decodes encoded data of an image signal; a generated information decoding device that decodes encoded data of a URI that identifies generated information for image generation; and an image generating device that generates an image from the image information decoded by the video decoding device and the generated information decoded by the generated information decoding device.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a video encoding device and a video decoding device. [Background technology]

[0002] In order to efficiently transmit or record moving images, a moving image encoding device is used that generates encoded data by encoding an image, and a moving image decoding device is used that generates a decoded image by decoding the encoded data.

[0003] A specific example of a video encoding method is the H.266 / VVC (Versatile Video Coding) method.

[0004] In such traditional image coding methods, an image is divided into parts for encoding / decoding. First, a predicted image is generated based on a locally decoded image obtained by encoding an input image / decoding the encoded data. Next, the predicted image is subtracted from the input image (original image) to obtain a prediction error (sometimes called a "difference image" or "residual image"), which is then coded / decoded.

[0005] Recently, a generative AI technique called Stable Diffusion, which uses a diffusion model as an image generation method using a neural network, has been disclosed. This technique can generate images based on text entered by the user, called a prompt.

[0006] Non-Patent Document 1 proposes a Supplemental Enhancement Information (SEI) message that can specify text information of a prompt for image processing in a generation AI for video encoded data.

[0007] Furthermore, Non-Patent Document 2 defines a Supplemental Enhancement Information (SEI) message as a video encoding and decoding technique for transmitting image properties, display methods, timing, etc. simultaneously with encoded data. It also presents a Neural-Network Post-filter Activation SEI message that indicates the application of post-filter processing based on a neural network. [Prior art documents] [Non-patent literature]

[0008] [Non-Patent Document 1] A. Hinds, G. Teniou, and S. Wenger, “AHG9: Text prompt for generative AI SEI,” Joint Video Experts Team (JVET) of ITU-T SG 16 WP 3 and ISO / IEC JTC 1 / SC 29, JVET-AG0167, Jan. 2024. [Non-patent document 2] ITU-T Rec. H.274 V3 "Versatile supplemental enhancement information messages for coded video bitstreams" Summary of the Invention [Problem to be solved by the invention]

[0009] In the method disclosed in Non-Patent Document 1, image processing by generative AI can be realized using text information provided by prompts. However, when trying to perform full-scale post-image processing, not only prompts but also many models and control parameters are required to define the processing. This leads to a problem that the amount of information becomes enormous, which results in a large amount of coding. Also, character information that is not aligned in byte units cannot be used immediately after decoding. [Means for solving the problem]

[0010] A video decoding device according to one aspect of the present invention includes: an image decoding device that decodes encoded data of an image signal; a generation information decoding device that decodes coded data of a URI that identifies generation information for image generation; The video decoding device further includes an image generating device that generates an image from the image information decoded by the video decoding device and the generated image information decoded by the generated image decoding device. [Effects of the Invention]

[0011] By adopting such a configuration, it is possible to solve the problem of implementing video encoding and decoding with a small amount of code using an image generation technique. [Brief explanation of the drawings]

[0012] [Figure 1] 1 is a schematic diagram showing the configuration of an image transmission system according to an embodiment of the present invention. [Figure 2] FIG. 1 is a block diagram illustrating an example of an image generation processing apparatus according to an embodiment of the present invention. [Figure 3] FIG. 1 is a diagram illustrating an example of a block diagram of a generation information creating device according to an embodiment of the present invention. [Figure 4] FIG. 1 is a diagram illustrating an example of a block diagram of a generated information encoding device according to an embodiment of the present invention. [Figure 5] FIG. 2 is a diagram illustrating an example of a block diagram of a generated information decoding device according to the present embodiment. [Figure 6] FIG. 10 is a diagram showing the syntax of the AI ​​Text Data SEI message of Reference 1. [Figure 7] FIG. 10 is a diagram showing an example of an extension of an AI text data SEI message according to this embodiment. [Figure 8] FIG. 10 is a diagram showing another example of an extension of the AI ​​text data SEI message according to this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0013] (First embodiment) FIG. 1 is a conceptual diagram showing the configuration of an image transmission system according to this embodiment.

[0014] The image transmission system 1 comprises a video encoding device 10, a transmission network 20, a video decoding device 30, and an image display device 40.

[0015] The video encoding device 10 receives an input image signal T and outputs encoded data Te.

[0016] The transmission network 20 transmits the encoded data Te from the video encoding device 10 to the video decoding device 30. The transmission network 20 is the Internet, a wide area network (WAN), a local area network (LAN), or a combination of these. The network 20 is not necessarily limited to a bidirectional communication network, but may also be a unidirectional communication network that transmits broadcast waves such as terrestrial digital broadcasting and satellite broadcasting. Furthermore, the transmission network 20 may be replaced by a storage medium on which the encoded data Te is recorded, such as a DVD (Digital Versatile Disc: trademark) or a BD (Blue-ray Disc: registered trademark).

[0017] The video decoding device 30 receives the coded data Te as input, outputs a generated image Td, and sends it to the image display device 40.

[0018] The image display device 40 displays all or part of the generated image Td output from the video decoding device 30. The image display device 40 includes a display device such as a liquid crystal display or an organic EL (Electro-luminescence) display. The display may be in the form of a stationary display, a mobile display, an HMD, or the like. When the video decoding device 30 has high processing power, it displays high-quality images, and when it has only low processing power, it displays images that do not require high processing power or display power.

[0019] The video encoding device 10 comprises an image encoding device 101, a generated information creating device 102, and a generated information encoding device 103.

[0020] The image encoding device 101 encodes an input image signal T to generate encoded data Te, and sends the decoded image information to the generated information creating device 102 .

[0021] The generated information creating device 102 receives the input image signal T, external model data, and decoded image information from the video encoding device, creates generated information, and sends it to the generated information encoding device 103 .

[0022] The generated information encoding device 103 encodes the generated information and saves the generated information as URI data in a specified URI (Uniform Resource Identifier) ​​on a server or a specific storage location on a network, and generates supplemental extension information encoded data including the URI. A URI is a character string for identifying an abstract or physical resource, and a URI specified in RFC2396 or RFC3986 may be used. The URI may be the name of the information, such as a Uniform Resource Name (URN), or the location of the information, such as a Uniform Resource Locator (URL).

[0023] The video decoding device 30 comprises an image decoding device 301 , an image generation processing device 302 , and a generated information decoding device 303 .

[0024] The image decoding device 301 receives the live encoded data Te transmitted via the transmission network 20 as input, decodes the image information, and transmits it to the image generating device 302 .

[0025] The generation information decoding device 302 decodes the auxiliary extension information of the encoded data Te based on the syntax, loads the URI data from the storage location (a server on the network or a specific storage location) based on the decoded URI, creates generation information, and sends the generation information to the image generation device 301.

[0026] The image generation processing device 303 performs image generation processing using the image information decoded by the image decoding device 301, the generation information decoded by the generation information decoding device 303, and model data from outside, generates a generated image Td, and outputs it to the image display device 40.

[0027] In this embodiment, the image encoding device 101 and the image decoding device 301 are realized by applying a general-purpose video encoding and decoding method such as AVC, HEVC, or VVC.

[0028] Fig. 2 is a conceptual diagram showing the configuration of an image generation processing device according to this embodiment. The image generation processing device according to this embodiment uses a generation image processing method based on so-called image generation AI, which is configured using a neural network such as a diffusion model. Image information, generation information, and model data are input, and a generated image is output.

[0029] The image generation processing device 303 comprises an image generation unit 3031, a control unit 3032, and a control image generation unit 3033. The image generation unit 3031 uses a generated image processing method configured by a neural network of Stable Diffusion. The control unit 3032 uses a control method configured by a neural network called Control Net. The control image generation unit 3033 generates image information A control image signal is generated from the information.

[0030] The control unit 3032 receives as input the image information, the control parameter information in the generation information, and the model data specified by the control parameters, and outputs control image information to be input to the image generation unit 3031. Here, the image information is the locally decoded image signal output by the image encoding device 101 or the decoded image signal output by the image decoding device 301.

[0031] Both are image information obtained by encoding and decoding an input image signal.

[0032] The control image signal is generated from image information by the control image generation unit 3033. Specifically, the control image signal uses the following information: The identification of these is included in the control parameters. Contour (Canny) image Soft edge image Sketch images Line art images Normal map image Depth map image Segmentation image Open Pose Image Wireframe (MLSD) images Inpainted image Reference image Both are monochrome or color image information created using an image. Note that the control image signal is not limited to one image, and multiple different control image signals may exist for the same image information.

[0033] The generation information includes control parameter information, model information, model parameter information, prompt information, and the like.

[0034] The control parameter information is a parameter for controlling the control unit 3302 described above, and includes identification of the basic image of the image information, identification of the control image, model information of the control unit, and the like.

[0035] The model information is the name of a neural network model to be used for image generation by the image generation unit 3301. The model data indicated by the model information is input as model data from outside to the image generation processing device 303. Alternatively, the video encoding device 10 and the video decoding device 30 may have the same model data.

[0036] The model parameters are parameters for controlling the neural network, and are various kinds of numerical and character string information such as intensity values, number of steps, type of sampler, and seed information.

[0037] The prompt information is character string information that indicates the content of the image to be generated. The prompt information includes a prompt that indicates the content that is desired to be generated and a negative prompt that indicates the content that is not desired to be generated.

[0038] 3 is a block diagram showing the configuration of generation information creation device 102 according to this embodiment. Generation information creation device 102 according to this embodiment receives an input image signal, image information created by a video encoding unit, and external model data, outputs generation information, and sends it to generation information encoding device 103.

[0039] The generated information creation device 102 is composed of a generated information creation unit 1021, an encoding control unit 1022, and an image generation processing device 1023. The image generation processing device 1023 is the same as the image generation processing device 303 described above, and outputs a generated image from the generated information, image information, and model data. The encoding control unit 1032 selects generated information based on two indices: an evaluation criterion D for image similarity, such as mean square error, absolute sum of error, SSIM (Structural Similarity), MS-SSIM (Multi-Scale Structural Similarity), or LPIPS (Learned Perceptual Image Patch Similarity), which is based on a comparison between the generated image result of the image generation device 303 and the input image signal; and the code amount R of the generated information created by the generated information creation unit 1021, and outputs the optimal one.

[0040] The generation information creating unit 1021 generates generation information by exchanging information with the encoding control unit 1022 and sends it to the image generation processing device 1023 .

[0041] The generation information encoding device 103 encodes the generation information created by the generation information creation device 102 and sends the auxiliary extension information encoded data together with the encoded data output by the image encoding device 101 as encoded data Te to the created transmission network 20.

[0042] The generated information decoding device 302 decodes the auxiliary extension encoded data out of the encoded data Te sent from the transmission network 20, and sends the decoding result to the image generation processing device 303 as generated information.

[0043] In this embodiment, encoding and decoding are performed as an SEI (Supplemental Enhancement Information) message based on a syntax described later. Note that the encoding and decoding method is not limited to the SEI message, and encoding and decoding may also be performed as a syntax in a video encoding and decoding method, such as an APS (Adaptation Parameter Set).

[0044] 4 is a block diagram showing the configuration of generation information encoding device 103 of this embodiment. Generation information encoding device 103 of this embodiment includes a supplemental extension information encoding unit 1031, a URI data encoding unit 1032, and a URI data saving unit 1033.

[0045] The supplementary extension information encoding unit 1031 defines an identifier for the generation information generated by the generation information creation device 102 as a URI (Uniform Resource Identifier), creates supplementary extension information encoded data as an SEI message described later, and sends it to the transmission network 20 as part of the encoded data Te.

[0046] The URI data encoding unit 1032 encodes the contents of the generated information whose identifier is defined by the supplementary extension information encoding unit 1031 as text information or compressed text data, converts it into URI data, and sends it to the URI data saving unit 1033.

[0047] The URI data saving unit 1033 saves the URI data encoded by the URI data encoding unit 1032 to the URI defined by the auxiliary extension information encoding unit 1031 in the location indicated by the URI (a server on the network or a specific storage location).

[0048] 5 is a block diagram showing the configuration of the generation information decoding device 302 according to this embodiment. The generation information decoding device 302 according to this embodiment includes a supplemental extension information decoding unit 3021, a URI data decoding unit 3022, and a URI data loading unit 3023.

[0049] The auxiliary extension information decoding unit 3021 decodes the auxiliary extension information encoded data out of the encoded data Te received from the transmission network 20. The auxiliary extension encoded data is decoded as an SEI message (described later), and the decoded URI is sent to the URI data loading unit 3023.

[0050] The URI data loading unit 3023 loads the encoded URI data from the location where it is stored (a server on the network or a specific storage location) based on the URI decoded by the supplemental extension information decoding unit 3021.

[0051] The URI data decoding unit 3022 decodes the generation information from the loaded URI data and sends it to the auxiliary extension decoding unit 3021. The auxiliary extension information decoding unit 3021 combines the generation information with the decoding result of the auxiliary extension encoded data and outputs it to the image generation processing device 303 as the final result.

[0052] 6, 7, and 8 show the syntax of generated information coded data that is coded and decoded by generated information coding device 103 and generated information decoding device 302 in this embodiment.

[0053] The meaning of the Descriptor notation in the following syntax tables is interpreted as follows: · b(8): Represents a byte value with any pattern of bit string (8 bits). f(n): represents a fixed-pattern bit string using n bits written left to right. se(v): represents a syntax element obtained by encoding a signed integer into 0th-order Exp-Golomb code. st(v): Represents a null-terminated string encoded in UTF-8. u(n): represents an unsigned integer using n bits. If n is "v" in the syntax table, the number of bits varies depending on the values ​​of other syntax elements. ·ue(v): represents the syntax element (left bit first) encoded as an unsigned integer with order 0 Exp-Golomb coding.

[0054] Figure 6 shows the syntax of the AI ​​Text Data SEI message in Non-Patent Document 1. In this embodiment, the specifications of this SEI message are extended. This SEI message sends prompt information as text, enabling post-image processing by the generation AI.

[0055] The syntax elements in FIG. 6 will be explained below.

[0056] A value of 1 in the syntax element ait_cancel_flag indicates that the SEI message cancels the persistence of the previous AI text data SEI message in the output order. A value of 0 in ait_cancel_flag indicates that AI text data information follows.

[0057] The syntax element ait_data_persistence_flag specifies the persistence of the AI ​​text data SEI message in the current layer. A value of 0 in ait_data_persistence_flag specifies that the AI ​​text data SEI message applies only to the current decoded picture. A value of 1 in ait_data_persistence_flag specifies that the AI ​​text data SEI message applies to the current decoded picture and persists in output order for all subsequent pictures in the current layer until one or more of the following conditions become true: A new CLVS for the current hierarchy is started. The bitstream ends. ·The picture of the current layer in the AU associated with the AI ​​text data SEI message is output following the current picture in output order.

[0058] The syntax element ait_data_string is a text string containing a command prompt to be interpreted by the generative AI engine. The text prompt is encoded as specified in ISO / IEC 10646: Information technology - Universal Coded Character Set (UCS). UTF-8 of the UCS may be used here, as specified by st(v).

[0059] In the AI ​​Test Data SEI message in Reference 1, text information is sent to the generating AI. However, when trying to perform full-scale post-image processing, not only the prompts but also the required models and control parameters for defining the processing increase, which creates a huge amount of text information and increases the amount of code in the SEI, which is an issue.

[0060] Therefore, in this embodiment, the syntax of the AI ​​text data SEI message is extended to not only transmit text information directly as SEI, but also define a URI to specify the generation information, as in the syntax of Figure 7, and define the URI as SEI. The generation information is then specified by the URI. The information indicated by the URI may be stored in advance in the generation information encoding device 103 and the generation information decoding device 302, or may be stored in a location indicated by the URI. It may also be stored in a location known to the generation information encoding device 103 and the generation information decoding device 302. For example, information stored on the Internet does not need to be transmitted again once it has been loaded. In this way, there is no need to directly transmit large amounts of data, and the problem can be solved.

[0061] Hereinafter, in FIG. 7, syntax elements added from FIG. 6 will be explained.

[0062] If the value of the syntax element ait_data_mode_idc is 0, it indicates that the generated information is encoded as text information by the syntax element ait_data_string. If the value of ait_data_mode_idc is 1, it indicates that the generated information is identified by the URI indicated by ait_data_uri in the format identified by the tag URI, ait_data_tag_uri.

[0063] The byte_aliged() function returns whether the current encoded data is in byte units. If it is not in byte units, it inserts the syntax element ait_data_bit_equal_to_zero to adjust the bit position so that the next element is positioned on a byte boundary. ait_data_alignment_zero_bit_a is assumed to be equal to 0.

[0064] In the AI ​​Test Data SEI message in Reference 1, there was an issue that the character information could not be used immediately after being decoded because it was not aligned in byte units before the ait_data_string.

[0065] Therefore, in this embodiment, byte_aliged() is inserted before the character string ait_data_string for generating AI, and if it is not byte aligned, a predetermined bit is inserted to enable ait_data_string to be easily interpreted as characters.Similarly, by inserting byte_aliged() before ait_data_tag_uri, the URI character strings ait_data_tag_uri and ait_data_uri can be easily interpreted as characters.

[0066] The syntax element ait_data_tag_uri contains a tag URI with syntax and semantics specified in IETF RFC 4151 - The 'tag' URI Scheme, which identifies the data type of the generated information and related information. Using ait_data_tag_uri makes it possible to uniquely identify the data type of the generated information specified by ait_data_uri without the need for a registration authority. For example, if ait_data_tag_uri is equal to "tag:stable_diffusion:deforum", it indicates that this is a configuration file for Deforum of Stable Diffusion identified by ait_data_uri.

[0067] ait_data_uri contains a URI with syntax and semantics specified in IETF RFC 3986 on Uniform Resource Identifiers (URIs) that identifies the generated information.

[0068] As described above, by identifying the generation information by URI, it is possible to deal with even a large amount of generation information for image generation.

[0069] As another alternative, a zip-compressed UCS string may be specified as a possible value of ait_data_mode_idc. For example, the following syntax configuration may be used when the value of ait_data_mode_idc is 2. Here, when ait_data_mode_idc is a specific value, the zip-compressed UCS string indicated by ait_zip_data_string, for example, a zip-compressed UCS-8 string, is decoded. The zip encoding method may be the method specified in ISO / IEC 21320-1.

[0070] if (ait_data_mode_idc == 0) ait_data_string else if (ait_data_mode_idc == 1) ait_data_tag_uri ait_data_uri else if (ait_data_mode_idc == 2) ait_zip_data_string As described above, by encoding the generation information using ZIP, it is possible to deal with even large amounts of generation information for image generation.

[0071] FIG. 8 shows an embodiment in which, in addition to the syntax of FIG. 7, information required for displaying the generated image to be output on the image display device 40 is added and described.

[0072] The syntax element ait_output_parameters_present_flag is a flag indicating whether information about the generated image to be output exists. If the value of ait_output_parameters_present_flag is 1, information about the generated image to be output exists. If the value of ait_output_parameters_present_flag is 0, information about the generated image to be output does not exist.

[0073] The value of the syntax element ait_output_pic_width_minus1 plus 1 indicates the number of pixels in the horizontal direction of the luminance signal of the output generated image.

[0074] The value of the syntax element ait_output_pic_height_minus1 plus 1 indicates the number of pixels in the vertical direction of the luminance signal of the output generated image.

[0075] The syntax element ait_output_chroma_format_idc indicates the chrominance format of the generated image to be output. A value of 0 for ait_output_chroma_format_idc indicates a monochrome image (4:0:0 format), a value of 1 for ait_output_chroma_format_idc indicates a 4:2:0 format, a value of 2 for ait_output_chroma_format_idc indicates a 4:2:2 format, and a value of 3 for ait_output_chroma_format_idc indicates a 4:4:4 format.

[0076] The value of the syntax element ait_output_luma_bitdepth_minus8 plus 8 indicates the pixel bit length of the luminance signal of the resulting image that is output.

[0077] The value of the syntax element ait_output_chroma_bitdepth_minus8 plus 8 indicates the pixel bit length of the color difference signal of the output resulting image.

[0078] The value of the syntax element ait_output_interpolated_pic indicates the number of pictures interpolated between input pictures.

[0079] The syntax element ait_vui_parameters_present_flag is a flag indicating whether or not VUI (Video Usability Information) parameter information exists for the generated image to be output. If the value of ait_vui_parameters_present_flag is 1, this indicates that VUI parameters exist for the generated image to be output. If the value of ait_vui_parameters_present_flag is 0, VUI parameters do not exist for the generated image to be output.

[0080] The syntax element ait_vui_payload_size_minus1 plus 1 indicates the number of bytes of raw data of the information inside the syntax structure of vui_payload().

[0081] The byte_aliged() function returns whether the current encoded data is in byte units. If it is not in byte units, it inserts the syntax element ait_vui_bit_equal_to_zero to adjust the bit position so that the next element is positioned on a byte boundary. ait_vui_alignment_zero_bit_a is assumed to be equal to 0.

[0082] The vui_payload() that specifically describes the YUI of the generated image to be output is the same as the vui_payload() of the VUI disclosed in Non-Patent Document 2.

[0083] As described above, in this embodiment, it has been shown that an image transmission system using a video encoding and decoding method that uses an image generation method can be realized by encoding and decoding using an SEI message that identifies generation information by a URI.

[0084] Note that part or all of the video encoding device 10 and the video decoding device 30 in the above-described embodiments may be implemented by a computer. In this case, a program for implementing the control functions may be recorded on a computer-readable recording medium, and the program may be loaded into a computer system and executed. Note that the term "computer system" as used herein refers to a computer system built into either the video encoding device 10 or the video decoding device 30, including hardware such as an OS and peripheral devices. Furthermore, the term "computer-readable recording medium" refers to portable media such as flexible disks, optical magnetic disks, ROMs, and CD-ROMs, as well as storage devices such as hard disks built into a computer system. Furthermore, the term "computer-readable recording medium" may also include media that dynamically store programs for a short period of time, such as communication lines used when transmitting programs via networks such as the Internet or telephone lines, or media that store programs for a fixed period of time, such as volatile memory within a computer system that serves as a server or client in such cases. Furthermore, the program may be a program for implementing part of the above-described functions, or may be a program that can be implemented in combination with a program already stored in the computer system.

[0085] Furthermore, part or all of the video encoding device 10 and the video decoding device 30 in the above-described embodiments may be realized as an integrated circuit such as an LSI (Large Scale Integration). Each functional block of the video encoding device 10 and the video decoding device 30 may be individually implemented as a processor, or part or all of them may be integrated into a processor. Furthermore, the integrated circuit implementation method is not limited to LSI, and may be implemented using a dedicated circuit or a general-purpose processor. Furthermore, if an integrated circuit implementation technology that can replace LSI emerges due to advances in semiconductor technology, an integrated circuit based on that technology may be used.

[0086] One embodiment of the present invention has been described in detail above with reference to the drawings, but the specific configuration is not limited to that described above, and various design changes and the like are possible within the scope that does not deviate from the gist of the present invention.

[0087] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. In other words, embodiments obtained by combining technical means modified appropriately within the scope of the claims are also included in the technical scope of the present invention. [Industrial Applicability]

[0088] The embodiments of the present invention can be suitably applied to a video decoding device that decodes coded data obtained by coding an image signal, and a video coding device that generates coded data obtained by coding image data, and can also be suitably applied to the data structure of coded data generated by a video coding device and referenced by the video decoding device. [Explanation of symbols]

[0089] 1. Image transmission system 10 Video Encoding Device 101 Image encoding device 102 Generative information creation device 1021 Generation Information Creation Department 1023, 303 Image generation processing device 1022 Encoding control unit 103 Generated information encoding device 1031 Supplementary Extension Code 1032 URI data encoding part 1033 URI data save section 20 Transmission Network 30 Video decoding device 301 Image decoding device 302 Generated information decoding device 3021 Supplementary extension information decoding unit 3022 URI data decoding unit 3023 URI Data Loading Unit 303 Image generation processing device 3031 Image Generation Unit 3032 Control section 3033 Control image generation unit 40 Image display device

Claims

1. an image decoding device that decodes encoded data of an image signal; a generation information decoding device that decodes coded data of a URI that identifies generation information for image generation; A video decoding device comprising an image generating device that generates an image from image information decoded by the image decoding device and generated information decoded by the generated image decoding device.

2. The video decoding device according to claim 1 , wherein the generation information decoding device acquires the generation information from a URI that identifies the generation information for image generation.

3. an image encoding device that encodes an image signal; a generation information creation device that creates generation information for generating an image from image information decoded by the image encoding device; A video encoding device comprising a generated information encoding device that encodes a URI that identifies the generated information.

Images