LDPC codes for robust transmission of images over wireless channels

We propose a novel scheme based on low density parity check (LDPC) codes for channel coding in a robust wireless image transmission system. These codes, which have received intense research attention recently, can achieve reliable transmission at rates approaching the channel capacity. Moreover, they offer an implementation advantage over turbo codes in terms of decoder complexity. To minimize latency in image reception, we consider the case where the image has been source coded using baseline JPEG. An additional level of unequal error protection is provided by applying Reed-Solomon codes to the JPEG header and marker segments. Finally, we present examples and simulation results that characterize the system performance for SNR per bit ranging from 1.6 to 2.1 dB.

[1]  Robert G. Gallager,et al.  Low-density parity-check codes , 1962, IRE Trans. Inf. Theory.

[2]  Nick G. Kingsbury,et al.  Still image coding for noisy channels , 1994, Proceedings of 1st International Conference on Image Processing.

[3]  Michael W. Marcellin,et al.  JPEG 2000: overview, architecture, and applications , 2000, Proceedings 2000 International Conference on Image Processing (Cat. No.00CH37101).

[4]  Michael T. Orchard,et al.  A comparative study of DCT- and wavelet-based image coding , 1999, IEEE Trans. Circuits Syst. Video Technol..

[5]  Michael Horstein,et al.  Review of 'Low-Density Parity-Check Codes' (Gallager, R. G.; 1963) , 1964, IEEE Transactions on Information Theory.

[6]  Alexander Vardy,et al.  Algebraic soft-decision decoding of Reed-Solomon codes , 2003, IEEE Trans. Inf. Theory.

[7]  D.J.C. MacKay,et al.  Good error-correcting codes based on very sparse matrices , 1997, Proceedings of IEEE International Symposium on Information Theory.

[8]  Chang Wen Chen,et al.  Error-resilient image and video transmission , 2000 .

[9]  Jiali He,et al.  On the application of turbo codes to the robust transmission of compressed images , 1997, Proceedings of International Conference on Image Processing.

[10]  S. Wicker Error Control Systems for Digital Communication and Storage , 1994 .

[11]  E. Eleftheriou,et al.  Channel precoding and low-density parity-check codes for magnetic recording , 2003, IEEE International Symposium on Information Theory, 2003. Proceedings..

[12]  Hongxin Song,et al.  Low density parity check codes for magnetic recording channels , 2000 .