Time discrete filter comprising upsampling, sampling rate...

Details Time discrete filter comprising upsampling, sampling rate... Time discrete filter comprising upsampling, sampling rate...

2008-05-20

2008-05-20

Mai, Tan V. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

Reexamination Certificate

active

07376690

ABSTRACT:
A time discrete filter comprises a sampling rate converter provided with an input and an output, and a down-sampler having a down-sampling factor nd. The time discrete filter further comprises an up-sampler having an up-sampling factor nu, whereby the up-sampler is coupled to the converter input, and the converter output is coupled to the down-sampler. It has been found that if a sampling rate conversion operation is preceded by an up-sampling operation and only after the conversion is followed by a down-sampling operation to a wanted sampling frequency, that then the complexity in terms of the ultimate number of calculations, in particular multiplications and additions, is reduced. This leads to a decrease of the number of instructions per second which is a measure for the complexity of a Digital Signal Processing (DSP) algorithm. In addition this leads to an associated decrease of power consumed by a DSP, such as applied in for example audio, video, and (tele)communication devices, as well as radio and television apparatus.

REFERENCES:
patent: 5717617 (1998-02-01), Chester
patent: 5903482 (1999-05-01), Iwamura et al.
patent: 2002/0116427 (2002-08-01), Jiang et al.
patent: 2003/0118092 (2003-06-01), Zangi
patent: 199 40 926 (2001-03-01), None
patent: WO 99/38257 (1999-07-01), None
patent: WO 00/65713 (2000-11-01), None
“On the Transposition of Linear Time-Varying Discrete-Time Networks and its Application to Multirate Digital Systems”, by T.A.C.M. Claasen et al., Philips Journal of Research.
“A Generalized Rate Change Filter Architecture”, by David Chester, Proceedings of the International Conference on Acoustics, Speech and Signal Processing, vol. 4, Apr. 1993.

Affiliated with

Also associated with

Rating

Time discrete filter comprising upsampling, sampling rate... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Time discrete filter comprising upsampling, sampling rate..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Time discrete filter comprising upsampling, sampling rate... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2768998