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Proceedings Paper

Walsh-Hadamard Transform/Differential Pulse Code Modulation (WHT/DPCM) Processing Of Intraframe Color Video
Author(s): E. S. Kim; K. R. Rao
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Paper Abstract

Hybrid processing of NTSC color images for achieving bandwidth compression is simulated. The processing involves combination of transform and predictive coding of intraframe video. Walsh-Hadamard transform (WHT) along each row followed by differential pulse code modulation (DPCM) along each column is implemented in (16 x 16) and (32 x 32) blocks. Also 2d-WHT of (4 x 4) blocks together with prediction of adjacent blocks is investigated. Based on the histogram of the difference signal, quantizers are optimized for minimum mean square error between the original and processed images. Variable bit allocation reflecting the variance of the error signal is adopted for maintaining a specified bit rate. The processing schemes are evaluated in terms of both subjective and objective criteria.

Paper Details

Date Published: 28 December 1979
PDF: 7 pages
Proc. SPIE 0207, Applications of Digital Image Processing III, (28 December 1979); doi: 10.1117/12.958252
Show Author Affiliations
E. S. Kim, University of Texas at Arlington (United States)
K. R. Rao, University of Texas at Arlington (United States)

Published in SPIE Proceedings Vol. 0207:
Applications of Digital Image Processing III
Andrew G. Tescher, Editor(s)

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