Title :
Directed acyclic graph based source modeling for data unit selection of streaming media over QoS networks
Author :
Cheung, Gene ; Tan, Wai-tian
Author_Institution :
Hewlett-Packard Labs., Palo Alto, CA, USA
Abstract :
Regardless of the network loss process, a central problem in rate-distortion optimized video streaming is the modeling of the resulting distortion associated with the loss of different subsets of data units. When the dependency among data units is modeled by a directed acyclic graph, previous work has modeled the distortion contribution of a data unit based on only two events: whether or not the data unit and all its dependent data units are available. The restriction to only two events allows the use of a single scalar to represent the distortion contribution of a data unit, and at the same time limits its accuracy. We consider the general case when a data unit can assume different distortion contributions when different subsets of its dependent data units are available. Rate-distortion optimized streaming using the general model is performed to demonstrate the possible gains.
Keywords :
data compression; decoding; directed graphs; optimisation; quality of service; rate distortion theory; source coding; telecommunication networks; video coding; QoS networks; data unit selection; decoding; delivery edges; directed acyclic graph; logical source coding unit; network loss process; optimization; rate-distortion optimized video streaming; scalar distortion nodes; source modeling; streaming media; vector distortion nodes; Decoding; Feedback; Laboratories; Performance gain; Quality of service; Rate-distortion; Source coding; Streaming media;
Conference_Titel :
Multimedia and Expo, 2002. ICME '02. Proceedings. 2002 IEEE International Conference on
Print_ISBN :
0-7803-7304-9
DOI :
10.1109/ICME.2002.1035427