In this paper,we consider data separation problem,where the original signal is composed of two distinct subcomponents,via dual frames based Split-analysis approach.We show that the two distinct subcomponents,which are...In this paper,we consider data separation problem,where the original signal is composed of two distinct subcomponents,via dual frames based Split-analysis approach.We show that the two distinct subcomponents,which are sparse in two diferent general frames respectively,can be exactly recovered with high probability,when the measurement matrix is a Weibull random matrix(not Gaussian)and the two frames satisfy a mutual coherence property.Our result may be signifcant for analysing Split-analysis model for data separation.展开更多
To enable quality scalability and further improve the reconstructed video quality in rate shaping,arate-distortion optimized packet dropping scheme for H.264 data partitioned video bitstream is proposed inthis paper.S...To enable quality scalability and further improve the reconstructed video quality in rate shaping,arate-distortion optimized packet dropping scheme for H.264 data partitioned video bitstream is proposed inthis paper.Some side information is generated for each video bitstream in advance,while streaming suchside information is exploited by a greedy algorithm to optimally drop partitions in a rate-distortion opti-mized way.Quality scalability is supported by adopting data partition instead of whole frame as the drop-ping unit.Simulation results show that the proposed scheme achieves a great gain in the reconstructedvideo quality over two typical frame dropping schemes,with the help of the fine granularity in droppingunit as well as rate-distortion optimization.展开更多
基金Supported by the National Natural Science Foundation of China(11171299 and 91130009)
文摘In this paper,we consider data separation problem,where the original signal is composed of two distinct subcomponents,via dual frames based Split-analysis approach.We show that the two distinct subcomponents,which are sparse in two diferent general frames respectively,can be exactly recovered with high probability,when the measurement matrix is a Weibull random matrix(not Gaussian)and the two frames satisfy a mutual coherence property.Our result may be signifcant for analysing Split-analysis model for data separation.
基金Supported by the National Natural Science Foundation of China ( No. 60702031 )the National High Technology Research and Development Programme of China (No. 2008AA01Z217A)
文摘To enable quality scalability and further improve the reconstructed video quality in rate shaping,arate-distortion optimized packet dropping scheme for H.264 data partitioned video bitstream is proposed inthis paper.Some side information is generated for each video bitstream in advance,while streaming suchside information is exploited by a greedy algorithm to optimally drop partitions in a rate-distortion opti-mized way.Quality scalability is supported by adopting data partition instead of whole frame as the drop-ping unit.Simulation results show that the proposed scheme achieves a great gain in the reconstructedvideo quality over two typical frame dropping schemes,with the help of the fine granularity in droppingunit as well as rate-distortion optimization.