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Comparison of nth-Order DPCM Encoder With Linear Transformations and Block Quantization Techniques

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1 Author(s)
A. Habibi ; Bell Telephone Labs., Inc., N.J.

Two important classes of coding schemes that use the spatial correlation of picture elements in reducing data redundancy are the differential pulse-code modulation (DPCM) and the unitary transform coding techniques. We will study the performance of an n th order DPCM system for n ranging from 1 to 22 and compare it to the performance of the unitary-transform techniques (Hadamard, Fourier, and KarhunenLoève) in coding two monochrome still pictures. We will also consider the sensitivities of the coding systems to picture-to-picture variations.

Published in:

IEEE Transactions on Communication Technology  (Volume:19 ,  Issue: 6 )