Title :
Optimized perfect reconstruction tree-structured filter banks for image coding
Author :
Balasingham, Ilangko ; Ramstad, Tor A.
Author_Institution :
Dept. of Telecommun., Norwegian Univ. of Sci. & Technol., Trondheim, Norway
Abstract :
By employing nonuniform nonunitary filter bank in an image coder increased performance in terms of both theoretical and practical (PSNR) coding gains, and subjective quality can be obtained. One possible candidate is octave-band tree-structured filter banks. An optimized perfect reconstruction octave-band three-stage tree-structured filter bank is proposed. The filter coefficients are optimized at each stage for subband coding gain. The performance of the proposed filter bank outperforms both traditional octave-band three-stage tree-structured filter banks and parallel filter banks in terms of both PSNR and visual quality
Keywords :
band-pass filters; circuit optimisation; filtering theory; image coding; image reconstruction; PSNR; filter coefficients; image analysis; image coder; image coding; nonuniform nonunitary filter bank; octave-band tree-structured filter banks; optimized filter banks; parallel filter banks; perfect reconstruction tree-structured filter banks; performance; subband coding gain; subjective quality; three-stage filter bank; Channel bank filters; Discrete wavelet transforms; Filter bank; Frequency; Image analysis; Image coding; Image reconstruction; Interpolation; PSNR; Quantization;
Conference_Titel :
Image Processing, 1996. Proceedings., International Conference on
Conference_Location :
Lausanne
Print_ISBN :
0-7803-3259-8
DOI :
10.1109/ICIP.1996.559564
