Defending against buffer map cheating in DONet-like P2P streaming
IEEE Transactions on Multimedia - Special section on communities and media computing
Implementing fully configurable video coding
ICIP'09 Proceedings of the 16th IEEE international conference on Image processing
Visual attention guided bit allocation in video compression
Image and Vision Computing
Proceedings of the international conference on Multimedia
Flexible macroblock ordering for context-aware ultrasound video transmission over mobile WiMAX
International Journal of Telemedicine and Applications - Special issue on healthcare applications and services in converged networking environments
A framework for error protection of region of interest coded images and videos
Image Communication
Arbitrary ROI-based wavelet video coding
Neurocomputing
A region-based rate-control scheme using inter-layer information for H.264/SVC
Journal of Visual Communication and Image Representation
Auto-scaled incremental tensor subspace learning for region based rate control application
ACCV'09 Proceedings of the 9th Asian conference on Computer Vision - Volume Part III
A novel H.264 rate control algorithm with consideration of visual attention
Multimedia Tools and Applications
ROI-based Video Quality Assessment and Regulation for Mobile Videoconferencing
Proceedings of Workshop on Mobile Video Delivery
| Hi-index | 0.00 |
In this paper, we propose a joint source-channel region-based rate control algorithm for real-time video transmissions over wireless systems. During the video transmission, the channel throughput available to the video encoder in the wireless systems is inherently variable, due to the retransmission of the error packets using the automatic repeat request (ARQ) error control. The variable data rate of the wireless system is characterized by the packet-level Gilbert two-state Markov Model, the parameters of which are extracted from the statistical properties of the channel information obtained from the wireless channel simulator. The proposed algorithm adopts a fast but effective block-based segmentation method to extract the regions of interest. Unlike traditional bit allocation methods used in the region/content-based rate control, the algorithm exploits the most effective criteria "coding qualities" as quantitative factors to directly control bit allocation among different regions so as to achieve better visual quality in the regions of interest. The computational complexity of the algorithm is low making it suitable for real-time applications. Compared with the MPEG-4 rate control algorithm, our algorithm can effectively enhance the perceptual quality for the regions of interest and significantly reduce the number of frame skipping; thereby, improve the smoothness of the video.