METHOD AND APPARATUS FOR ADAPTIVELY DIVIDING THE SIZE OF GOP IN VIDEO CODING BASED ON HIERARCHICAL B-PICTURE

摘要

The present invention relates to a method for coding a GOP is adaptively subdivided during the hierarchical B- picture-based video coding is performed in GOP (Group of Picture) unit consisting of 2 ^N of the frame sequence. The method, of the GOP unit With respect to the frame sequence, (a) from at least two up to two size ^NM (M is an integer of 1 or more and smaller than N) to each of the units for different sub-GOP sizes perform the enemy B- picture-based encoding hierarchy of each sub-band the difference between the original image and the reconstructed image after encoding and obtaining respectively, (b) and selecting at least one or more sub-GOP size based on the difference value obtained from the result of encoding each of the different sub-GOP units , (c) it is characterized in that it includes generating a bit stream to the selected at least one or more sub-GOP units. ; According to the invention, it is possible to obtain a high coding efficiency by encoding the GOP size is adaptively subdivided in accordance with the performance at the time of video coding using a hierarchical B- picture. ; Hierarchical B- picture-based coding (B-picture_based hierarchical coding), the video encoding, the adaptive GOP structure.