DocumentCode :
2406865
Title :
A dual priority M-QAM transmission system for high quality video over mobile channels
Author :
Theodorakopoulos, Vasileios ; Woodward, Michael E. ; Sotiropoulou, Kaliopi
Author_Institution :
Dept. of Comput., Bradford Univ., UK
fYear :
2005
fDate :
6-9 Feb. 2005
Firstpage :
218
Lastpage :
225
Abstract :
This paper presents a dual priority transmission system for mobile channels suitable for mobile video applications. A dual priority 16-QAM is selected to transport the compressed video bitstream which is partitioned to mach the bit-error sensitivity of the transmitted symbol in terms of mapping in the constellation diagram and picture quality. The partition scheme is applied to split the ITU-T H.263-coded video bitstream and is suitable for constant bit rate transmission where the allocation of the VL-coded information amongst the two partitions is performed adoptively. Simulation results show that this strategy results in higher quality of the reconstructed video data. Investigations have been carried out for a possible extension in higher level modulation schemes such as 64 and 256 QAM and simulation results show that further improvement can be achieved. The implementation of a codec that supports the 64 and 256 QAM system is under development.
Keywords :
data compression; mobile computing; quadrature amplitude modulation; telecommunication channels; video codecs; video coding; 16-QAM; ITU-T H.263-coded video bitstream; QAM system; VL-coded information; bit-error sensitivity; codec; compressed video bitstream; constellation diagram; dual priority M-QAM transmission system; high quality video; mobile channels; mobile video application; picture quality; Bit rate; Codecs; Constellation diagram; Informatics; Information management; Mobile computing; Protection; Quadrature amplitude modulation; Video compression; Videoconference;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Distributed Frameworks for Multimedia Applications, 2005. DFMA '05. First International Conference on
Print_ISBN :
0-7695-2273-4
Type :
conf
DOI :
10.1109/DFMA.2005.4
Filename :
1385205
Link To Document :
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