画像符号化用電力相補特性2チャネル直線位相偶数次IIRフィルタバンク

概要

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This paper presents a method for designing a 6th-order two-channel linear-phase IIR filter bank with quasipower complementary characteristics for image subband coding. The lowpass filter is specified to have a double or quadruple zero at ω=π and is designed with weighted equiripple approximation based on the formulation of an eigen-value problem. A design example of an image subband coding system using a three-stage octave division filter bank with rounded integer analysis output signals has shown to have a pseudo perfect reconstruction image "Lena" with a PSNR as high as 55.8 dB. The coding performance (PSNR versus bit rate) using bit plane arithmetic coding was nearly equal to that of 5th-order IIR filter banks and superior to 9/7 FIR filter banks.
社団法人映像情報メディア学会の論文
2003-01-01