Proxy-based handheld device access to live NASA satellite weather images

We present a new proxy-based system to allow public use handheld devices to access instantly to the Low Resolution Picture Taking (LRPT) satellite weather image data and display regional weather image. First the location-based transcoding is done from non frame based satellite image to frame based CIF/QCIF image for handheld device. GPS information from expansion module is used in the location of the region of interest. A robust fixed-length joint source and channel coding scheme is then implemented to achieve robust wireless transmission. Experimental results show that the proposed system is suitable to the time varying, low bandwidth wireless channel and power constraint on wireless handheld devices.

[1]  Jan Biemond,et al.  An optimal bit allocation algorithm for sub-band coding , 1988, ICASSP-88., International Conference on Acoustics, Speech, and Signal Processing.

[2]  Zhi-Li Zhang,et al.  A framework for proxy-based receiver adaptation for layered video transmission in multicast networks , 1999, Proceedings 1999 International Conference on Image Processing (Cat. 99CH36348).

[3]  W. Kent Fuchs,et al.  Proxy-based recovery for applications on wireless hand-held devices , 2000, Proceedings 19th IEEE Symposium on Reliable Distributed Systems SRDS-2000.

[4]  Douglas L. Jones,et al.  Joint source channel matching for a wireless image transmission , 1998, Proceedings 1998 International Conference on Image Processing. ICIP98 (Cat. No.98CB36269).

[5]  Warner H. Miller,et al.  A visually lossless data compression technique for real-time frame/pushbroom space science imagers , 2000 .

[6]  Kenneth Zeger,et al.  Progressive image coding for noisy channels , 1997 .

[7]  James W. Modestino,et al.  Operational rate-distortion performance for joint source and channel coding of images , 1999, IEEE Trans. Image Process..

[8]  Andrea J. Goldsmith,et al.  Joint design of fixed-rate source codes and multiresolution channel codes , 1998, IEEE Trans. Commun..

[9]  R.F. Rice.  Lossless coding standards for space data systems , 1996, Conference Record of The Thirtieth Asilomar Conference on Signals, Systems and Computers.

[10]  Jianfei Cai,et al.  Robust joint source-channel coding for image transmission over wireless channels , 2000, IEEE Trans. Circuits Syst. Video Technol..

[11]  Chang Wen Chen,et al.  Robust image transmission with bidirectional synchronization and hierarchical error correction , 2001, IEEE Trans. Circuits Syst. Video Technol..

[12]  Kin K. Leung,et al.  Link-condition based proxies for QoS management in wireless networks , 2001, 12th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. PIMRC 2001. Proceedings (Cat. No.01TH8598).