Title :
Bounding the Rate Region of Vector Gaussian Multiple Descriptions with Individual and Central Receivers
Author :
Zhang, Guoqiang ; Kleijn, W. Bastiaan ; stergaard, J.
Author_Institution :
ACCESS Linnaeus Center, KTH - R. Inst. of Technol., Stockholm, Sweden
Abstract :
The problem of the rate region of the vector Gaussian multiple description with individual and central quadratic distortion constraints is studied. We have two main contributions. First, a lower bound on the rate region is derived. The bound is obtained by lower-bounding a weighted sum rate for each supporting hyperplane of the rate region. Second, the rate region for the scenario of the scalar Gaussian source is fully characterized by showing that the lower bound is tight. The optimal weighted sum rate for each supporting hyperplane is obtained by solving a single maximization problem. This is contrary to existing results, which require solving a min-max optimization problem.
Keywords :
Gaussian processes; combined source-channel coding; minimax techniques; receivers; central receivers; individual receivers; maximization problem; min-max optimization problem; optimal weighted sum rate; scalar Gaussian source; vector Gaussian multiple descriptions; Communication channels; Covariance matrix; Data compression; Quality of service; Random variables; Source coding; Transmitters; multiple description coding; rate region;
Conference_Titel :
Data Compression Conference (DCC), 2010
Conference_Location :
Snowbird, UT
Print_ISBN :
978-1-4244-6425-8
Electronic_ISBN :
1068-0314