Patent ID: 8509311
Filing Date: 2013-08-13
Classification: H03M,H04N

Abstract:
1. A decoding method for adaptively carrying out field-based or frame-based decoding processing at a macroblock level with image information, the decoding method comprising: a context model generating step of generating a context model corresponding to a syntax element for carrying out the frame-based or the field-based decoding processing, wherein the context model corresponding to motion vector information of a current macroblock is generated based on a sum of an absolute value of motion vector information of macroblocks neighboring the current macroblock, and when the current macroblock is subject to the field-based encoding and a neighboring macroblock is subject to frame-based encoding, the motion vector information corresponding to the neighboring macroblock is calculated by converting the vertical component of the motion vector information corresponding to the neighboring macroblock to the equivalent for field-based encoding and is applied to the context model corresponding to the motion vector information of current macroblock; an arithmetic decoding step of carrying out arithmetic decoding processing using the context model corresponding to the motion vector information of the current macroblock generated in the context model generating step to decode the motion vector information; and a motion compensation step of generating a reference image based on the motion vector information.