19. The non-transitory computer-readable medium of claim 18 , wherein the instructions for extracting media objects and further generating media object descriptions further comprise: segmenting the content of each multimedia type in the multimedia object into segments within the multimedia object by media segmentation processing; and generating at least one feature description for at least one of the segments by feature extraction and annotation, wherein the generated media object descriptions comprise the at least one feature description for the at least one of the segments.
25. The non-transitory computer-readable medium of claim 19 , wherein generating media entity relation graph descriptions generates entity relation graph descriptions of the media object descriptions based on relationship of the media objects represented by the media object descriptions, wherein the relationships are selected from the group comprising media feature relationships, semantic feature relationships, temporal feature relationships, and spatial feature relationships.