Adaptive Wavelet-Packet Decomposition for Rate Control of Object Oriented Coding of Video Sequences

A novel object dependent coding scheme based on optimization upon wavelet packet trees is proposed. The method may be employed in the context of object oriented video standard MPEG-4 for constraint distortion minimization for each Video Object (VO). Optimal transmission rates are evaluated for each VO which guarantee that important VO (like the foreground) are transmitted with distortions which are equal or less than preselected distortion values. The proposed algorithm is applied to object dependent coding of video frames of the Akiyo sequence with Peak-Signal-to-Noise (PSNR) values, which are higher for the foreground than the background. Experimental results, which favor the proposed method, are provided as well.