Efficient Wavelet-Based Video Coding
IPDPS '02 Proceedings of the 16th International Parallel and Distributed Processing Symposium
WAA '01 Proceedings of the Second International Conference on Wavelet Analysis and Its Applications
The Coefficient Based Rate Distortion Model for the Low Bit Rate Video Coding
CAIP '01 Proceedings of the 9th International Conference on Computer Analysis of Images and Patterns
Global serverless videoconferencing over IP
Future Generation Computer Systems - Special section: Selected papers from the TERENA networking conference 2002
A motion compensated lifting wavelet codec for 3D video coding
Journal of Computer Science and Technology
WSEAS Transactions on Circuits and Systems
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In this paper, we propose a very low bit-rate video coding scheme based on a discrete wavelet transform (DWT), block-matching motion estimation (BME), and overlapped block motion compensation (OBMC). Our approach reveals that the coding process works more efficiently if the quantized wavelet coefficients are preprocessed by a mechanism exploiting the redundancies in the wavelet subband structure. Thus, we introduce a new framework of preceding techniques based on the concepts of partitioning, aggregation, and conditional coding (PACC). Our experimental results show that our PACC coder outperforms the VM (Version 5.1) of MPEG4 both for the coding of intraframes (1-2 dB PSNR) and residual frames (up to 1.5 dB PSNR) of typical MPEG4 test sequences. The subjective quality of reconstructed video is, in general, superior to that obtained from the VM implementation. In addition, when restricted to the intraframe mode, the proposed coding algorithm produces results which are among the best reported for still image compression