A pipelined adaptive lattice filter architecture

Author

Shanbhag, Naresh R. ; Parhi, Keshab K.

Author_Institution

Dept. of Electr. Eng., Minnesota Univ., Minneapolis, MN, USA

Volume

41

Issue

5

fYear

1993

fDate

5/1/1993 12:00:00 AM

Firstpage

1925

Lastpage

1939

Abstract

The stochastic gradient adaptive lattice filter is pipelined by the application of relaxed look-ahead. This form of look-ahead maintains the functional behavior of the algorithm instead of the input-output mapping and is suitable for pipelining adaptive filters. The sum and product relaxations are employed to pipeline the filter. The hardware complexity of the pipelined filters is the same as for the sequential filter and is independent of the level of pipelining or speedup. Two pipelined architectures along with their convergence analyses are presented to illustrate the tradeoff offered by relaxed look-ahead. Simulation results supporting the conclusions of the convergence analysis are provided. The proposed architectures are then employed to develop a pipelined adaptive differential pulse-code modulation (DPCM) codec for video compression applications. Speedup factors up to 20 are demonstrated via simulations with image data

Keywords

adaptive filters; codecs; data compression; digital filters; image processing; pipeline processing; video equipment; ADPCM codec; convergence analysis; hardware complexity; image data; pipelined adaptive lattice filter architecture; product relaxation; relaxed look-ahead; simulations; speedup factors; stochastic gradient adaptive lattice filter; sum relaxation; video compression; Adaptive filters; Analytical models; Convergence; Hardware; Lattices; Modulation coding; Pipeline processing; Pulse compression methods; Pulse modulation; Stochastic processes;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.215309

Filename

215309