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Multiplierless filter Bank design: structures that improve both hardware and image compression performance

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3 Author(s)
K. A. Kotteri ; Microsoft Corp., Redmond, WA, USA ; A. E. Bell ; J. E. Carletta

Design techniques for high-performance, fixed-point, multiplierless filter banks are presented. Image compression using the biorthogonal 9/7 discrete wavelet transform provides a motivating example. Image compression and hardware performance of two commonly used filter structures, direct and cascade, and two known filter bank structures, nonpolyphase and polyphase, are compared. A technique is shown for designing a fixed-point polyphase filter structure, which is highly efficient from a hardware standpoint, such that image-compression quality is not significantly deteriorated by the use of fixed-point mathematics. The result is a polyphase structure with about twice the throughput rate of nonpolyphase structures, and peak signal-to-noise ratio values for lossy compression within 0.2 decibels of those achieved using floating-point filters.

Published in:

IEEE Transactions on Circuits and Systems for Video Technology  (Volume:16 ,  Issue: 6 )