Method and apparatus for decoding/encoding a video signal

Abstract

The method includes the steps of receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation for a single direction or a bi-direction between a plurality of views with view number information and view identification information, obtaining type information indicating whether the random access slice is predicted for a single direction or a bi-direction, initializing the reference picture list using the view number information and the view identification information according to the type information, obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list, determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value, modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value, determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and decoding the macroblock using the prediction value, wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views.

1 . A method for decoding a multi-view video data in a multi-view video stream; comprising:
 receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture;   obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation for a single direction or a bi-direction between a plurality of views with view number information and view identification information;   obtaining type information indicating whether the random access slice is predicted for a single direction or a bi-direction;   initializing the reference picture list using the view number information and the view identification information according to the type information;   obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list;   determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value;   modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value;   determining a prediction value of a macroblock in the random access picture based on the modified reference picture list; and   decoding the macroblock using the prediction value,   wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views.   
   
   
       2 . The method of  claim 1 , wherein the view number information indicates a number of reference views of the random access picture, and the view identification information provides a view identifier of each reference view for the random access picture. 
   
   
       3 . The method of  claim 1 , wherein the multi-view video data includes video data of a base view independent of other views, the base view being a view decoded without using inter-view prediction. 
   
   
       4 . The method of  claim 1 , wherein the type information for a single directional prediction represents a P-slice type and the type information for a bi-directional prediction represents a B-slice type. 
   
   
       5 . The method of  claim 4 , wherein the reference picture list is respectively initialized for the bi-direction when the type information represents a B-slice type. 
   
   
       6 . The method of  claim 1 , wherein the difference value is obtained from a slice header. 
   
   
       7 . The method of  claim 1 , wherein the determined assignment modification value is used to assign an inter-view reference index to the random access picture in the initialized reference picture list. 
   
   
       8 . The method of  claim 1 , wherein the assignment modification value represents a variable associated with a view identifier of an inter-view reference picture in the initialized reference picture list. 
   
   
       9 . The method of  claim 1 , wherein the position of any other remaining pictures are shifted to later in the initialized reference picture list. 
   
   
       10 . An apparatus for decoding a multi-view video data in a multi-view video stream, comprising:
 a nal parsing unit receiving the multiview video data stream including a random access picture including a random access slice, the random access slice referencing only slice corresponding to a same time and a different view of the random access picture, and obtaining initialization information of a reference picture list for the random access slice, the initialization information representing a reference relation for a single direction or a bi-direction between a plurality of views with view number information and view identification information, and obtaining type information indicating whether the random access slice is predicted for a single direction or a bi-direction;   a decoded picture buffer unit initializing the reference picture list using the view number information and the view identification information according to the type information, and obtaining a difference value from the a multi-view video data stream according to the type information, the difference value representing a residual of inter-view reference index in the initialized reference picture list, and determining an assignment modification value for modifying the inter-view reference index in the initialized reference picture list according to the difference value, and modifying the initialized reference picture list for inter-view prediction using the determined assignment modification value; and   an inter-prediction unit determining a prediction value of a macroblock in the random access picture based on the modified reference picture list, and   decoding the macroblock using the prediction value,   wherein the initialization information is obtained based on a value indicating decoding order between the plurality of views.   
   
   
       11 . The apparatus of  claim 10 , wherein the view number information indicates a number of reference views of the random access picture, and the view identification information provides a view identifier of each reference view for the random access picture. 
   
   
       12 . The apparatus of  claim 10 , wherein the multi-view video data includes video data of a base view independent of other views, the base view being a view decoded without using inter-view prediction. 
   
   
       13 . The apparatus of  claim 10 , wherein the determined assignment modification value is used to assign an inter-view reference index to the random access picture in the initialized reference picture list. 
   
   
       14 . The apparatus of  claim 10 , wherein the assignment modification value represents a variable associated with a view identifier of an inter-view reference picture in the initialized reference picture list. 
   
   
       15 . The apparatus of  claim 10 , wherein the position of any other remaining pictures are shifted to later in the initialized reference picture list.