Theoretic Analysis of Inter Frame Dependency in Video Coding
PCM '08 Proceedings of the 9th Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
Efficient one-pass frame level rate control for H.264/AVC
Journal of Visual Communication and Image Representation
Modified steepest-descent for bit allocation in strongly dependent video coding
IEEE Transactions on Circuits and Systems for Video Technology
Consistent picture quality control strategy for dependent video coding
IEEE Transactions on Image Processing
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A steepest descent based bit allocation method with polynomial iteration complexityfor minimizing the sum of frame distortions under a total bit rate constraintis presented for a predictive video coder. Previous algorithms that solve this problemhave been based on Lagrangian Relaxation followed by unconstrained optimization.Some of these methods have complexity exponential in the prediction depth in theworst case. Moreover, the convergence properties of the faster methods are difficult toanalyze. A steepest descent method is utilized here for its comparatively low computationalcomplexity, excellent performance and ease of analysis. Sufficient conditionsfor global optimality are presented without assuming independent encoding of frames.Results for dependent bit allocation through the assignment of quantizer step-sizes toframes in MPEG-2 encoded sequences suggest that these optimality conditions are toa large extent satisfied in practice. A PSNR improvement of up to 1.5 dB is obtainedover the standard TM5 rate control algorithm for MPEG-2.