Two-dimensional finite impulse response filters

Details Two-dimensional finite impulse response filters Two-dimensional finite impulse response filters

1986-09-23

1989-04-11

Harkcom, Gary V.

Boots, shoes, and leggings

36472413, 36472416, G06F 1531

Patent

active

048212237

ABSTRACT:
A two-dimensional finite impulse response (FIR) filter comprises a demultiplexer for demultiplexing an input data signal comprising adjacent digital words into p (e.g. 2) slower data signals each having a slower rate equal to 1/p (e.g. 1/2) of the data rate of the input signal and each comprising every p.sup.th (e.g. every alternate) word of the input signal. The slower data signals are passed to p (e.g. 2) filter portions each comprising a horizontal FIR filter and a vertical FIR filter. The horizontal filters are each connected to receive all of the slower data signals and all of them are operative simultaneously to effect horizontal filtration by periodically processing sets of adjacent words of the input signal, the sets of adjacent words being processed at any one time by the respective horizontal filters being offset with respect to one another by one word. A multiplexer receives output signals of the filter portions to form a filtered output data signal having a data rate equal to that of the input data signal.

REFERENCES:
patent: 4493080 (1985-01-01), Campbell
patent: 4507746 (1983-03-01), Fletcher, Jr.
patent: 4612625 (1986-09-01), Bertrand
patent: 4623980 (1986-11-01), Varg
patent: 4691292 (1987-09-01), Rothweiler
patent: 4709394 (1987-11-01), Bessler et al.
Nussbaumer, "Discrete Transforms Filter", IBM Technical Disclosure Bulletin, vol. 18, #12, pp. 4048-4053, May 1976.
Crochiere et al., "Interpolation and Decemation of Digital Signals--A Tutorial Review", Proc. of the IEEE, vol. 69, #3, pp. 300-331, Mar. 1981.
Esteban et al., "HQMF: Halfband Quadrature Mirror Filters", Conference ICASSP 81, Proc. of the 1981 IEEE Int. Conf. on Acoustics Speed, and Signal Processing, Atlanta, GA USA, (Mar. 30-Apr. 1, 1981), pp. 220-223.

Affiliated with

Also associated with

Rating

Two-dimensional finite impulse response filters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Two-dimensional finite impulse response filters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Two-dimensional finite impulse response filters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-671568