Efficient Coding of Motion Vector Predictor Using Phased-in Code

The H.264/AVC video coding standard performs inter prediction using variable block sizes to improve coding efficiency. Since we predict not only the motion of the homogeneous region but also the motion of the nonhomogeneous region accurately using variable block sizes, we can reduce residual information effectively. However, each motion vector should be transmitted to the decoder. In low bit rate environments, motion vector information takes approximately 40% of the total bitstream. Thus, motion vector competition was proposed to reduce the amount of motion vector information. Since the size of the motion vector difference is reduced by motion vector competition, it requires only a small number of bits for motion vector information. However, we need to send the corresponding index of the best motion vector predictor for decoding. In this paper, we propose a new codeword table based on the phased-in code to encode the index of the motion vector predictor efficiently. Experimental result...

• Type: Journal
• Year: 2010
• Where: PCM
• Authors: Ji-Hee Moon, Yo-Sung Ho
• Keywords: Motion Vector, Motion Vector Competition, Motion Vector Information, Multimedia, PCM 2010