Method for encoding/decoding synchronized multi-view video by using spatial layout information and apparatus of the same

1. A video encoding method comprising:

acquiring a synchronized omnidirectional multi-view video;

generating spatial layout information of the synchronized omnidirectional multi-view video;

encoding the synchronized omnidirectional multi-view video; and

signaling the spatial layout information corresponding to the encoded multi-view video,

wherein the spatial layout information comprises:

projection type information corresponding to a layout of the synchronized omnidirectional multi-view video; and

perspective information corresponding to the projection type information, and wherein the perspective information is signaled with the projection type information.

2. The video encoding method of claim 1 , wherein the synchronized omnidirectional multi-view video is a video having a plurality of multi-view sub images arranged on a time-based synchronized video frame according to a spatial layout.

3. The video encoding method of claim 1 , wherein the spatial layout information is signaled through a parameter set for encoding the synchronized omnidirectional multi-view video.

4. The video encoding method of claim 3 , further comprising

signaling a flag showing whether the synchronized omnidirectional multi-view video or not through the parameter set.

5. The video encoding method of claim 1 , wherein the spatial layout information further comprises at least one of type index, camera parameter, scene angle, scene dynamic range, independent sub image, and scene time information.

6. The video encoding method of claim 1 , wherein the spatial layout information further comprises scanning order information of the synchronized omnidirectional multi-view video.

7. The video encoding method of claim 1 , wherein the spatial layout information further comprises independency information corresponding to a plurality of sub images of the synchronized omnidirectional multi-view video, and

wherein each of the plurality of sub images are identified as an independent sub image encoded or decoded without reference to another sub image and a dependent sub image encoded or decoded with reference to another sub image.

8. The video encoding method of claim 7 , wherein a boundary region near each of the plurality of sub images is encoded with reference to the independent sub image, and

wherein a boundary region of a decoded independent sub image or a decoded dependent sub image is referred in decoding of rest a remainder of the plurality of sub images.

9. A video decoding method comprising;

receiving a bit stream including an encoded video;

acquiring spatial layout information corresponding to a synchronized omnidirectional multi-view video; and

selectively decoding at least a portion of the bit, stream based on the spatial layout information,

wherein the spatial layout information comprises:

projection type information corresponding to a layout of the synchronized omnidirectional multi-view video; and

perspective information corresponding to the projection type information, and wherein the perspective information is signaled with the projection type information.

10. The video decoding method according to claim 9 , wherein the step of selectively decoding comprises selecting the portion of the bit stream corresponding to an interested region determined according to a change in user perspective.

11. The video decoding method of claim 9 , wherein the synchronized omnidirectional multi-view video is a video having a plurality of sub images arranged on a time-based synchronized video frame according to a spatial layout,

wherein each of the plurality of sub images are identified as an independent sub image encoded or decoded without reference to another sub image or a dependent sub image encoded or decoded with reference to another sub image.

12. The video decoding method of claim 11 , wherein the selectively decoding comprises using a picture designated as SRAP (SPATIAL RANDOM ACCESS PICTURE) as a reference picture for decoding the plurality of multi-view sub images.

13. The video decoding method of claim 11 , wherein the selectively decoding comprises decoding a picture designated as an independent sub image as a reference picture for the dependent sub images.

14. The video decoding method of claim 11 , wherein the selectively decoding comprises adding the independent sub images having the same POC (Picture Order Count) as the dependent sub images to be decoded into a reference picture list.

15. The video decoding method of claim 11 , wherein the selectively decoding comprises performing decoding using a prediction method in screen with an independent sub image on a boundary region of a dependent sub image.

16. The video decoding method of claim 11 , wherein the selectively decoding comprises applying a weighting factor of decoding calculation according to a synchronized multi-view video type.

17. The video decoding method of claim 16 , wherein the applying the weighting factor comprises setting a base QP (Quality Parameter) value on a boundary region of a sub image higher than that of an other region.