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Complexity reduction of variable size block motion estimation and compensation for a video CODEC

Bijur, Gururaj (2006) Complexity reduction of variable size block motion estimation and compensation for a video CODEC. In: IEEE International Conference on Signal and Image Processing – 2006, December 7 - 9, 2006., BVBCE, Hubli, Karnataka.

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The Motion Estimation and Compensation is an integral part of a video CODEC (enCOder and DECoder). Motion estimation creates a model of the current frame based on available data in one or more previously encoded frames (reference frames). Motion estimation and compensation is used as part of the predictive process. If a frame sequence shows moving objects, then their motion within the scene can be measured, and the information can be used to predict the content of frames later in the sequence. The design goal for a motion estimation algorithm is to model the current frame as early as possible whilst maintaining acceptable computational complexity. Variable size block motion estimation and compensation (VSBME) is adopted in H.264 standard. However, the complexity of the variable size block motion estimation technique is too high to be widely applied in real-time applications. This paper proposes an efficient method for variable size block motion estimation and compensation by reducing number of search point. In proposed method some of the mode calculations for a macroblock can be skipped by using threshold for each mode. Here a slight increase in the residual frame is observed but the number of search points is reduced and thereby reducing computational complexity. By using proposed method a reduction of 77.946% to 98.85% is achieved in number of search points with just 3.52 % to 21.49 % increase in average energy in residual frames.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Motion estimation, Video CODEC, FSBME, VSBME
Subjects: Engineering > MIT Manipal > MCA
Depositing User: MIT Library
Date Deposited: 10 Jan 2014 06:16
Last Modified: 10 Jan 2014 06:22

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