| 摘要 |
A VIDEO DECODER (300), ENCODER (500), AND CORRESPONDING METHODS FOR PROCESSING VIDEO SIGNAL DATA FOR AN IMAGE BLOCK AND A PARTICULAR REFERENCE PICTURE INDEX TO PREDICT THE IMAGE BLOCK ARE DISCLOSED THAT UTILIZE ADAPTIVE WEIGHTING OF REFERENCE PICTURES TO ENHANCE VIDEO COMPRESSION, WHERE A DECODER (300) INCLUDES A REFERENCE PICTURE WEIGHTING FACTOR UNIT (380) FOR DETERMINING A WEIGHTING FACTOR CORRESPONDING TO THE PARTICULAR REFERENCE PICTURE INDEX; AN ENCODER (500) INCLUDES A REFERENCE PICTURE WEIGHTING FACTOR ASSIGNOR (572) FOR ASSIGNING A WEIGHTING FACTOR CORRESPONDING TO THE PARTICULAR REFERENCE PICTURE INDEX; AND A METHOD FOR DECODING INCLUDES RECEIVING A REFERENCE PICTURE INDEX WITH THE DATA THAT CORRESPONDS TO THE IMAGE BLOCK, DETERMINING A WEIGHTING FACTOR FOR EACH RECEIVED REFERENCE PICTURE INDEX, RETRIEVING A REFERENCE PICTURE FOR EACH INDEX, MOTION COMPENSATING THE RETRIEVED REFERENCE PICTURE, AND MULTIPLYING THE MOTION COMPENSATED REFERENCE PICTURE BY THE CORRESPONDING WEIGHTING FACTOR TO FORM A WEIGHTED MOTION COMPENSATED REFERENCE PICTURE. |
