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LOW-COMPLEXITY RATE-DISTORTION OPTIMAL MACROBLOCK MODE SELECTION FOR MPEG-LIKE VIDEO CODERS
 

Summary: LOW-COMPLEXITY RATE-DISTORTION OPTIMAL MACROBLOCK MODE SELECTION
FOR MPEG-LIKE VIDEO CODERS
Hyungjoon Kim and Yucel Altunbasak
Center for Signal and Image Processing
Georgia Institute of Technology
Atlanta, GA 30332-0250
ABSTRACT
Constrained optimization techniques provide an effec-
tive 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 appli-
cations. In this paper, we propose a new method for rate-
distortion optimized coding mode selection. Instead of us-
ing the Lagrangian method, we employ a computationally
efficient, yet highly effective rate-distortion model to mini-
mize the overall distortion of a macroblock. Extensive ex-
perimental 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,

  

Source: Altunbasak, Yucel - School of Electrical and Computer Engineering, Georgia Institute of Technology

 

Collections: Engineering