Method for processing overlay in 360-degree video system and apparatus for the same

A 360-degree image data processing method performed by a 360-degree image transmission apparatus, the method comprising:

• obtaining a 360-degree image;
• deriving a picture by processing the 360-degree image;
• generating metadata related to the 360-degree image;
• encoding the picture;
• and
• performing a process for storing or transmitting the encoded picture and the metadata,
• wherein the metadata includes metadata related to an overlay, and
• wherein the metadata related to the overlay comprises packing information of the overlay

A 360-degree video reception apparatus comprising

• a reception processor configured to receive 360-degree image data, and obtain information on an encoded picture and metadata from the 360-degree image data;
• a data decoder configured to decode a picture based on the information on the encoded picture;
• and
• a renderer configured to render the decoded picture and an overlay based on the metadata,
• wherein the metadata includes overlay related metadata,
• wherein the renderer is configured to render the overlay based on the overlay related metadata, and
• wherein the overlay related metadata include packing information of the overlay.