Accession Number : ADA323660

Title :   Optimum Low Cost Two Channel IIR Orthonormal Filter Bank,

Corporate Author : CALIFORNIA INST OF TECH PASADENA DEPT OF ELECTRICAL ENGINEERING

Personal Author(s) : Tuqan, Jamal ; Vaidyanathan, P. P.

PDF Url : ADA323660

Report Date : APR 1997

Pagination or Media Count : 4

Abstract : In this paper, we statistically optimize a well known class of IIR two channel orthonormal filter banks parameterized by a single coefficient when subband quantizers are present. The optimization procedure is extremely simple and very fast compared for example to the linear programming method used in the FIR case to achieve similar compaction (coding) gains. The special form of the filters assure the existence of a zero at pi which can be important for some wavelet applications and eliminate some of the major concerns that arise in the FIR design case. Finally, the compaction gain obtained is high and numerically very close to two (ideal case) for low pass spectra, high pass spectra and certain cases of multiband spectrum. For these cases, the use of higher order IIR filters does not increase the compaction (coding) gain.

Descriptors :   *INFRARED FILTERS, *FOURIER SPECTROSCOPY, OPTIMIZATION, LINEAR PROGRAMMING, CODING, FREQUENCY BANDS, COMPACTING.

Subject Categories : Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE