A two-pass rate control algorithm for H.264/AVC high definition video coding
Image Communication
Adaptive video coding control for real-time H.264/AVC encoder
Journal of Visual Communication and Image Representation
New rate distortion bounds for natural videos based on a texture-dependent correlation model
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Rate-distortion optimization of scalable video codecs
Image Communication
Rate distortion bounds for blocking and intra-frame prediction in videos
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
Joint optimization coding for level and map information in H.264/AVC
Image Communication
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The rate-distortion (R-D) optimization technique plays an important role in optimizing video encoders. Modeling the rate and distortion functions accurately in acceptable complexity helps to make the optimization more practical. In this paper, we propose a bit-rate estimation function and a distortion measure by modeling the transform coefficients with spatial-domain variance. Furthermore, with quantization-based thresholding to determine the number, the absolute sum, and the squared sum of transform coefficients, the simplified transform-domain R-D measurement is introduced. The proposed algorithms can reduce the computation complexity for the R-D optimized mode-decision by using the new cost function evolving from the simplified transform-domain R-D model. Based on the proposed estimations, a rate-control scheme in the macroblock layer is also proposed to improve the coding efficiency