A resource allocation algorithm for real-time streaming in cognitive networks
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Delay constrained multiplexing of video streams using dual-frame video coding
IEEE Transactions on Image Processing
Motion estimation in low-delay hierarchical p-frame coding using motion vector composition
Journal of Visual Communication and Image Representation
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Real-time video applications require tight bounds on end-to-end delay. Hierarchical bidirectional prediction requires buffering frames in the encoder input buffer, thereby contributing to encoder input delay. Long-term frame prediction with pulsed quality requires buffering at the encoder output, increasing the output buffer delay. Both hierarchical B-pictures and pulsed-quality coders involve uneven bit-rate allocation. Both the encoder and decoder buffering requirements depend on the rate allocation. We derive an efficient rate allocation for hierarchical B-pictures using the power spectral density of a wide-sense stationary process. In addition, we discuss important aspects of hierarchical predictive coding, such as the effect of the temporal prediction distance and delay tradeoffs for prediction branch truncation. Finally, we investigate experimentally the tradeoff between delay and compression efficiency.