Journal of the Korean Institute of Telematics and Electronics S (전자공학회논문지S)
- Volume 35S Issue 5
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- Pages.94-102
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- 1998
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- 1226-5837(pISSN)
A dynamic selection of advanced prediction mode in H.263 encoder using error distribution of motion estimation
움직임 추정 오차 분포를 이용한 H.263 부호화기의 진보 예측 모드의 동적 선택
Abstract
In this paper, we proposed a dynamic selection scheme of advnaced prediction mode(DAPM), which reduces computational cost and improves coding efficiency. We can select the mode between default prediction mode (DPM) and advanced prediction mode (APM) according to motion componenets in a frame dynamically. For this purpose, we defined error distribution of motion estimation (EDME) as sum of absolute difference(SAD) for each searching points. This distribution region is divided to four subregions. We calculate minimum values in each subregions and then, we determine whether block motion estimation is performed or not depending on the results. As a result, we reduced computational complexity to 30% without degradation of image quality compared to fixed APM(FAPM) by selecting DPM for linear movement.
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