Method and apparatus for transreceiving broadcast signal for panorama service

1. A method for transmitting a broadcast signal by an apparatus for transmitting a broadcast signal, comprising:

encoding an original panoramic image, wherein the original panoramic image is divided into two or more images and wherein each divided image is encoded and carried by a video stream, respectively;

multiplexing the divided images and signaling information about the original panoramic image and the divided images into a single broadcast stream;

generating a broadcast signal including the multiplexed broadcast stream; and

transmitting the generated broadcast signal,

wherein the signaling information includes resolution information of the original panoramic image, information indicating a number of video stream carrying the divided images and composition information of the original panoramic image,

wherein the composition information of the original panoramic image includes resolution information of each divided image carried by the video stream, and

wherein the signaling information further includes an active format description which includes start coordinate values of an active portion belonging to the divided images and the active portion is a partial image of the divided image to be displayed.

2. The method according to claim 1 , wherein the signaling information about the image includes event connection information indicating information about a panorama broadcast service corresponding to a currently viewed broadcast service.

3. The method according to claim 2 , wherein the signaling information further includes information for cropping the original panoramic image into one or more images.

4. The method according to claim 2 , wherein the encoding comprises encoding additional information on a region of interest (ROI) of a user in the original panoramic image, for providing a high-definition image of the ROI, and the multiplexing comprises multiplexing the encoded original panoramic image, the signaling information about the original panoramic image and the encoded ROI additional information into a single broadcast stream.

5. The method according to claim 4 , wherein the signaling information further includes information about the image of the ROI.

6. The method according to claim 1 , wherein the signaling information further includes filtering information for removing blocking artifacts from the divided images.

7. A method for receiving a broadcast signal by an apparatus for receiving a broadcast signal, comprising:

receiving a broadcast stream including two or more video streams carrying divided images of an original panoramic image and signaling information about the original panoramic image and the divided images;

extracting the video streams and the signaling information about the original panoramic image and the divided images from the received broadcast stream; and

decoding the extracted video streams using the extracted signaling information,

wherein the signaling information includes resolution information of the original panoramic image, information indicating a number of video stream carrying the divided images and composition information of the original panoramic image,

wherein the composition information of the original panoramic image includes resolution information of each divided image carried by the video stream, and

wherein the signaling information further includes an active format description which includes start coordinate values of an active portion belonging to the divided images and the active portion is a partial image of the divided image to be displayed.

8. The method according to claim 7 , wherein the signaling information about the image includes event connection information indicating information about a panorama broadcast service corresponding to a currently viewed broadcast service.

9. The method according to claim 8 ,

wherein the decoding comprises respectively decoding the video streams using the extracted signaling information.

10. The method according to claim 9 , wherein the signaling information further includes filtering information for removing blocking artifacts from the divided images.

11. The method according to claim 8 , wherein the broadcast stream includes a stream with respect to additional information on an ROI of a user in the original panoramic image, for providing a high-definition image of the ROI,

wherein the extracting comprises extracting the video streams the stream with respect to the ROI additional information and the signaling information about the original panoramic image and the divided images from the received broadcast stream, and the decoding comprises decoding the extracted video streams and the extracted stream with respect to the ROI additional information using the extracted signaling information.

12. The method according to claim 11 , wherein the signaling information further includes information about the image of the ROI.

13. The method according to claim 8 , wherein the signaling information further includes information for cropping the original panoramic image into one or more images.

14. The method according to claim 7 , further comprising displaying the decoded video streams with respect to the image,

wherein the displaying comprises displaying a region shifted according to a scrolling request when the scrolling request is received from a user.

15. An apparatus for transmitting a broadcast signal, comprising:

an encoder for encoding an original panoramic image, wherein the original panoramic image is divided into two or more images and wherein each divided image is encoded and carried by a video stream, respectively;

a multiplexer for multiplexing the divided images and signaling information about the original panoramic image and the divided images into a single broadcast stream;

a broadcast signal generator for generating a broadcast signal including the multiplexed broadcast stream; and

a transmitter for transmitting the generated broadcast signal,

wherein the signaling information includes resolution information of the original panoramic image, information indicating a number of video stream carrying the divided images and composition information of the original panoramic image,

wherein the composition information of the original panoramic image includes resolution information of each divided image carried by the video stream, and

wherein the signaling information further includes an active format description which includes start coordinate values of an active portion belonging to the divided images and the active portion is a partial image of the divided image to be displayed.

16. An apparatus for receiving a broadcast signal, comprising:

a receiver for receiving a broadcast stream including two or more video streams carrying divided images of an original panoramic image and signaling information about the original panoramic image and the divided images;

a demultiplexer for extracting the video streams and the signaling information about the original panoramic image and the divided images from the received broadcast stream; and

a decoder for decoding the extracted video streams using the extracted signaling information,

wherein the signaling information includes resolution information of the original panoramic image, information indicating a number of video stream carrying the divided images and composition information of the original panoramic image,

wherein the composition information of the original panoramic image includes resolution information of each divided image carried by the video stream, and

wherein the signaling information further includes an active format description which includes start coordinate values of an active portion belonging to the divided images and the active portion is a partial image of the divided image to be displayed.