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Summary: RATE-DISTORTION OPTIMAL JOINT MACROBLOCK MODE SELECTION AND
MOTION ESTIMATION FOR MPEG-LIKE VIDEO CODERS
Hyungjoon Kim and Yucel Altunbasak
Center for Signal and Image Processing
Georgia Institute of Technology
Atlanta, GA 30332-0250
hyung,yucel@ece.gatech.edu
ABSTRACT
Rate-Distortion optimization can significantly improve encoder per-
formance in MPEG-like video coding applications especially when
it is applied to coding mode selection and motion estimation. Nev-
ertheless, it is not easy to implement Rate-Distortion optimization
in real-time video encoders because of its prohibitive computa-
tional cost. In this paper, we propose a joint macroblock mode
selection and motion estimation by employing a computationally-
efficient, yet highly-effective rate-distortion model. Experimen-
tal results show that the proposed algorithm provides significant
PSNR improvements with a small increase in overall computa-
tional load over the TM5-based encoder.
1. INTRODUCTION
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