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A New Structure of the Perfect Reconstruction Filter Banks for Subband Coding
Jiro KATTO Yasuhiko YASUDA
IEICE TRANSACTIONS (1976-1990)
Publication Date: 1990/10/25
Print ISSN: 0000-0000
Type of Manuscript: Special Section PAPER (Special Issue on Communication Theory and Its Applications)
Category: Signal Processing and Image Compression
Full Text: PDF(858.1KB)>>
To reduce the computational complexity due to the long tap structure of filters used for subband coding, a new structure of filter banks is proposed. Applying the concept of hierarchical coding to the perfect reconstruction condition in a one-dimensional analysis/synthesis system, which is represented as a matrix operation in z-transform domain, our approach realizes perfect reconstruction with short length FIR filters and reduction of the number of filters by half compared with the conventional approaches. Moreover, it is expanded to two-dimensional case, where both a separable structure and a non-separable one are considered.