Selection Vector Dwt + Vq Obmc Predictor Frame Buffer Quadtree Coding Ivq Iwt + Bitstream Output Input Frame Vectors Motion Code Quadtree Labels
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چکیده
A novel adaptive VQ based subband coding scheme for very low bit rate coding of video sequences is presented. Overlapped block motion estimation/compensation is employed to exploit interframe redundancy. A 2D wavelet transform (WT) is applied to the resulting displaced frame diierence (DFD) signal. The WT coee-cients are encoded using an adaptive vector quantization scheme in combination with a dynamic bit allocation strategy based on marginal analysis. Simulation results on videophone-type test sequences are given to evaluate the performance of the codec at very low bit rates. A comparative performance with the H.261 and H.263 video coding standards is also shown.
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تاریخ انتشار 2007