Multiresolution coding for digital transmission

Sheng-Wei Lin; WenThong Chang

doi:10.1117/12.157932

22 October 1993 Multiresolution coding for digital transmission

Sheng-Wei Lin, WenThong Chang

Proceedings Volume 2094, Visual Communications and Image Processing '93; (1993) https://doi.org/10.1117/12.157932
Event: Visual Communications and Image Processing '93, 1993, Cambridge, MA, United States

Abstract

Joint consideration for signal bit stream priority in source coding and the Euclidean distance between signal points in modulation achieves stepwise degradation in the picture quality. In this multiresolution strategy, system performance is affected by how the original images are decomposed, and how many signal levels are used in modulation. With 1:2 ratio of bit-rates between two components in multiresolution 64 QAM transmission, we investigate subband coder, pyramid coder, and decomposed DCT coder in multiresolution source coding. Optimum quantization is employed with the nonuniform quantizer matched to Laplacian distribution. Simulation reveals that decomposed DCT coder is a better candidate for multiresolution transmission, which has the advantages that the source coder is simple and not sensitive to bit-ratio variation.

Citation Download Citation

Sheng-Wei Lin and WenThong Chang "Multiresolution coding for digital transmission", Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); https://doi.org/10.1117/12.157932

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