# US 2019/0320156 A1 · Multiple-viewpoints related metadata transmission and reception method and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0320156 A1 - Document ID: US20190320156A1 - Status: Published application - Kind: A1 - Application number: 16/382,798 - Filed: 2019-04-12 - Published: 2019-10-17 - Earliest claimed: 2018-04-15 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Sejin OH - Web page: https://patentgrep.com/patent/US20190320156A1 ## CPC - H04N 13/178: Metadata, e.g. disparity information - H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence) - H04N 13/117: the virtual viewpoint locations being selected by the viewers or determined by viewer tracking - H04N 19/597: specially adapted for multi-view video sequence encoding - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION ## Abstract Disclosed is a 360-degree video data processing method performed by a 360-degree video transmission apparatus, the method including: obtaining 360-degree video data captured by at least one camera; deriving a two-dimensional (2D) picture comprising omnidirectional image by processing the 360-degree video data; generating metadata for the 360-degree video data; encoding information on the 2D picture; and performing encapsulation based on the encoded information on the 2D pictureand the metadata, wherein the metadata comprises initial viewpoint ID information of viewpoint group which is related to the 360-degree video data. ## Claims ### Claim 1 A 360-degree video data processing method performed by a 360-degree video transmission apparatus, the method comprising: obtaining 360-degree video data captured by at least one camera; deriving a two-dimensional (2D) picture comprising omnidirectional image by processing the 360-degree video data; generating metadata for the 360-degree video data; encoding information on the 2D picture; and performing encapsulation based on the encoded information on the 2D picture and the metadata, wherein the metadata comprises initial viewpoint ID information of viewpoint group which is related to the 360-degree video data. ### Claim 2 (depends on 1) The method of claim 1, wherein an initial viewpoint of the viewpoint group is indicated based on the initial viewpoint ID information. ### Claim 3 (depends on 1) The method of claim 1, wherein the metadata comprises information on center coordinate system of the viewpoint group. ### Claim 4 (depends on 3) The method of claim 3, wherein the information on the center coordinate system comprises information on rotation angle of the center coordinate system. ### Claim 5 (depends on 4) The method of claim 4, wherein the information on the rotation angle of the center coordinate system comprises information on angle of rotation of the center coordinate system from global coordinate system when an origin of the center coordinate system is coincident with an origin of the global coordinate system. ### Claim 6 (depends on 4) The method of claim 4, wherein the information on the center coordinate system further comprises information on azimuth and information on elevation of an origin of the center coordinate system in relation to a global coordinate system. ### Claim 7 (depends on 2) The method of claim 2, wherein the metadata comprises initial viewpoint flag information indicating whether a first viewpoint included in the viewpoint is the initial viewpoint. ### Claim 8 (depends on 7) The method of claim 7, wherein when the initial viewpoint flag information indicates 0, a second viewpoint indicated based on the initial viewpoint ID information is determined as the initial viewpoint, and wherein the second viewpoint included in the viewpoint is different from the first viewpoint. ### Claim 9 (depends on 2) The method of claim 2, wherein the initial viewpoint is a viewpoint that is a viewpoint of when a 360-degree video scene including the viewpoint group is initially reproduced. ### Claim 10 (depends on 2) The method of claim 2, wherein the initial viewpoint is a viewpoint that is returned from another viewpoint included in the viewpoint group. ### Claim 11 (depends on 1) The method of claim 1, wherein the metadata comprises information on a switchable viewpoint group indicating viewpoints for which viewpoint switching is allowed. ### Claim 12 (depends on 1) The method of claim 1, wherein the metadata comprises information on a selectable viewpoint group indicating viewpoints for which viewpoint selection is needed. ### Claim 13 (depends on 1) The method of claim 1, wherein the metadata comprises information on a first track, and wherein the information on the first track comprises track ID information for referring to a second track different from the first track. ### Claim 14 A 360-degree video transmission apparatus processing 360-degree video data, the apparatus comprising: a data input unit configured to obtain 360-degree video data captured by at least one camera; a projection processor configured to derive a two-dimension (2D) picture including an omnidirectional image by processing the 360-degree video data; a metadata processor configured to generate metadata for the 360-degree video data; a data encoder configured to encode the information on the 2D picture; and an encapsulation processor configured to perform encapsulation based on the encoded information on the 2D picture and the metadata. ### Claim 15 A 360-degree video data processing method performed by a 360-degree video reception apparatus, the method comprising: receiving information on 360-degree video data; obtaining information on an encoded picture and metadata from the information on the 360-degree video; decoding a picture based on the information on the encoded picture; and rendering the decoded picture based on the metadata, wherein the metadata comprises initial viewpoint ID information of a viewpoint group related to the 360-degree video data.