Frequency scramble for secure communication of images using multidimensional digital filters

Author

Murakosi, Sho ; Kawamata, Masayuki ; Higuchi, Tatsuo

Author_Institution

Dept. of Electron. Eng., Tohoku Univ., Sendai, Japan

fYear

1992

Firstpage

500

Abstract

Multidimensional frequency scramble for secure communication of images using multidimensional linear periodically shift-variant digital filters (LPSV filters) is studied. The notion of a generalized multidimensional transfer function is presented for LPSV filters. The frequency characteristic of the filters is discussed in terms of this transfer function. Two-dimensional LPSV filters are designed based on the one-dimensional Parks-McClellan algorithm. The resultant LPSV filters divide the input spectrum into some components that are permuted and possibly inverted. Experimental results are presented to illustrate the effectiveness of multidimensional frequency scramble using the LPSV filters

Keywords

image coding; security of data; telecommunications computing; transfer functions; two-dimensional digital filters; videotelephony; visual communication; 2D filters; TV telephone; frequency characteristic; frequency scramble; generalized multidimensional transfer function; linear periodically shift-variant digital filters; multidimensional digital filters; one-dimensional Parks-McClellan algorithm; secure communication of images; Algorithm design and analysis; Cable TV; Digital filters; Facsimile; Finite impulse response filter; Frequency; Multidimensional systems; Nonlinear filters; Telephony; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1992., Proceedings of the 35th Midwest Symposium on

Conference_Location

Washington, DC

Print_ISBN

0-7803-0510-8

Type

conf

DOI

10.1109/MWSCAS.1992.271353

Filename

271353