Video encoding method, video decoding method, video encoding apparatus, video decoding apparatus, video encoding program, and video decoding program

Abstract

A video processing system 100 is provided with video encoding device 10 and video decoding device 20 . The video encoding device 10 implements backward interframe prediction from a temporally subsequent frame and outputs information indicating that an option to eliminate use of a decoded image of the temporally subsequent frame was chosen. The video decoding device 20 eliminates use of the decoded image of the frame on the basis of this information, in conjunction with input of the information for eliminating use of the decoded image of the temporally subsequent frame.

1 . A video encoding method for video encoding apparatus to implement backward interframe prediction from a temporally subsequent frame, the video encoding method comprising: 
 outputting information indicating that an option to eliminate use of a decoded image of the temporally subsequent frame was chosen.    
     
     
         2 . A video decoding method for video decoding apparatus to implement backward interframe prediction from a temporally subsequent frame, said video decoding method comprising: 
 in conjunction with input of information for eliminating use of a decoded image of the temporally subsequent frame, avoiding outputting the decoded image of the frame on the basis of said information.    
     
     
         3 . A video encoding apparatus for implementing backward interframe prediction from a temporally subsequent frame, said video encoding apparatus being configured to: 
 output information indicating that an option to eliminate use of a decoded image of the temporally subsequent frame was chosen.    
     
     
         4 . The video encoding apparatus according to  claim 3 , wherein said information is information providing an instruction to eliminate use of every frame, for the decoded image of said temporally subsequent frame.  
     
     
         5 . The video encoding apparatus according to  claim 3 , wherein said information is information providing an instruction to eliminate use of every frame not used as a reference frame for backward prediction, for the decoded image of said temporally subsequent frame.  
     
     
         6 . The video encoding apparatus according to  claim 3 , wherein said information includes information indicating an output time about a decoded image of a frame use of which is eliminated.  
     
     
         7 . A video decoding apparatus for implementing backward interframe prediction from a temporally subsequent frame, said video decoding apparatus being configured to: 
 in conjunction with input of information for eliminating use of a decoded image of the temporally subsequent frame, avoid outputting the decoded image of the frame on the basis of said information.    
     
     
         8 . The video decoding apparatus according to  claim 7 , wherein said information is information providing an instruction to eliminate use of every frame, for the decoded image of said temporally subsequent frame.  
     
     
         9 . The video decoding apparatus according to  claim 7 , wherein said information is information providing an instruction to eliminate use of every frame not used as a reference frame for backward prediction, for the decoded image of said temporally subsequent frame.  
     
     
         10 . The video decoding apparatus according to  claim 7 , wherein said information includes information indicating an output time about a decoded image of a frame use of which is eliminated.