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Low-complexity rate-distortion optimal macroblock mode selection for MPEG-like video coders

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2 Author(s)
Hyungjoon Kim ; Center for Signal & Image Process., Georgia Inst. of Technol., Atlanta, GA, USA ; Altunbasak, Y.

Constrained optimization techniques provide an effective solution to the rate-distortion optimized mode selection in hybrid motion compensation-DCT based video encoders. However, the minimization of the Lagrangian cost function often presents a computational burden in real-time applications. In this paper, we propose a new method for rate distortion optimized coding mode selection. Instead of using the Lagrangian method, we employ a computationally efficient, yet highly effective rate-distortion model to minimize the overall distortion of a macroblock. Extensive experimental results show that the proposed method provides PSNR improvements of 2.79, 1.64 and 1.54 dB over TM5-based MPEG-2 encoder, at the bit-rates of 2, 4 and 6 Mbps, respectively, with negligible increase in computational complexity.

Published in:

Multimedia and Expo, 2003. ICME '03. Proceedings. 2003 International Conference on  (Volume:3 )

Date of Conference:

6-9 July 2003

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