Abstract: A video transmission method according to embodiments comprises: a pre-processing step for processing video data; a step for encoding the video data; and/or a step for transmitting a bitstream including the video data. A video reception method according to embodiments comprises the steps of: receiving video data; decoding the video data; and/or rendering the video data.

Abstract: A method of learning a neural network-based image compression model according to the disclosed embodiment, may include receiving a learning target image as an input; encoding the input image through the neural network-based image compression model configured to include a weight parameter, and decoding the encoded image through the neural network-based image compression model; calculating an entropy estimation value for a network model weight of the neural network-based image compression model; calculating a reconstruction performance value by comparing qualities of the learning target image and the decoded image; and learning the neural network-based image compression model by updating the weight parameter of the neural network-based image compression model based on the entropy estimation value for the network model weight and the reconstruction performance value. Accordingly, it is possible to minimize the size of the weight of the neural network-based image compression model.

Abstract: Disclosed herein are a multi-view video encoding/decoding method and apparatus, and a method for transmitting a bitstream generated by the multi-view video encoding method. The multi-view video encoding method according to the present disclosure may include generating first bitstreams for each of a plurality of quantization parameters (QPs) different from each other by encoding an atlas for a multi-view video in the quantization parameters; extracting second bitstreams for sub-regions in the atlas from the first bitstreams; and generating a third bitstream by merging, among the second bitstreams, second bitstreams with a predetermined bit rate.

Abstract: Disclosed herein are an immersive image encoding/decoding method and apparatus, and a method for transmitting a bitstream generated by the immersive image encoding method. An immersive image encoding method according to the present disclosure may include: generating geometry atlases for an immersive image; aligning the geometry atlases to make an alignment height of the geometry atlases correspond to a height of a texture atlas; and generating a geometry bitstream by encoding the aligned geometry atlases.

Abstract: Provided are a method and an apparatus for streaming a multi-view 360 degree video, and a method for streaming a 360 degree video according to an embodiment of the present disclosure includes: encoding a multi-view video to a bitstream of a base layer and a bitstream of a tile layer constituted by at least one tile; selecting a tile included in a user view video in the encoded bitstream of the tile layer by using user view information received from a 360 degree video rendering apparatus, and video information of the multi-view video; extracting tile data included in the selected user view video from the encoded bitstream of the tile layer, and generating a tile bitstream corresponding to the extracted tile data; and transmitting the encoded bitstream of the base layer and the generated tile bitstream to the 360 degree video rendering apparatus.

Abstract: An image encoding/decoding method and apparatus are provided. An image decoding method according to the present disclosure includes: receiving an image, in which a first atlas for a basic view of a current image and a second atlas for an additional view of the current image are merged; extracting an image divided in a predetermined image unit within the first atlas and the second atlas; dividing the first atlas and the second atlas in the predetermined image unit; and reconstructing the image divided in the predetermined image unit, wherein the dividing of the first atlas and the second atlas in the predetermined image unit may non-uniformly divide the first atlas and the second atlas.

Abstract: A video transmission method according to embodiments comprises: a pre-processing step for processing video data; a step for encoding the video data; and/or a step for transmitting a bitstream including the video data. A video reception method according to embodiments comprises the steps of: receiving video data; decoding the video data; and/or rendering the video data.

Abstract: Provided are a method and an apparatus for streaming a multi-view 360 degree video, and a method for streaming a 360 degree video according to an embodiment of the present disclosure includes: encoding a multi-view video to a bitstream of a base layer and a bitstream of a tile layer constituted by at least one tile; selecting a tile included in a user view video in the encoded bitstream of the tile layer by using user view information received from a 360 degree video rendering apparatus, and video information of the multi-view video; extracting tile data included in the selected user view video from the encoded bitstream of the tile layer, and generating a tile bitstream corresponding to the extracted tile data; and transmitting the encoded bitstream of the base layer and the generated tile bitstream to the 360 degree video rendering apparatus.