Title :
Partial correction of transmission errors in Walsh transform image without recourse to error correction coding
Author :
Wong, W.C. ; Steele, R.
Author_Institution :
Loughborough University of Technology, Electronic and Electrical Engineering Department, Loughborough, UK
Abstract :
A sequency difference detection and correction (s.d.d.c.) system is described which enables the partial correction of transmission errors in a Walsh-Hadamard transform image to be achieved without channel coding. Using a first-order two-dimensional random Gaussian Markov field as the image, the percentage mean-square error in the recovered signal is reduced with the aid of the s.d.d.c. system by two orders of magnitude for transmission error rates <3%.
Keywords :
Walsh functions; encoding; error correction; error detection; transforms; Walsh transform image; error correction coding; random Gaussian Markov field; sequence difference detection; transmission errors;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19780203
