Low-power digital filtering using approximate processing with variable canonic signed digit coefficients

Young Woo Kim, Young Mo Yang, Jae Tack Yoo, Soo-Won Kim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

An approximate processing reduces the computational complexity and the power consumption of a digital filter by adjusting the order to input signal statistics. We present an alternate approximate processing method which dynamically adjusts filter coefficients represented by canonic signed digit (CSD) coefficients. Proposed method adjusts the precision of the filter coefficients by controlling the length of the CSD coefficients. By adjusting the length of the CSD coefficients in each approximation level, the proposed method can be used to reduce the computational complexity. This paper reports a procedure to select the proper length of CSD coefficients to the input signal statistics. Our experimental results with a digital filter for Audio Codec '97 demonstrated that the numbers of addition operations can be reduced down to 29.4%, 11.8%, and 3.9% for each approximation level in computing the filter coefficients.

Original languageEnglish
Title of host publicationProceedings - IEEE International Symposium on Circuits and Systems
PublisherIEEE
Volume2
Publication statusPublished - 2000
EventProceedings of the IEEE 2000 Internaitonal Symposium on Circuits and Systems - Geneva, Switz
Duration: 2000 May 282000 May 31

Other

OtherProceedings of the IEEE 2000 Internaitonal Symposium on Circuits and Systems
CityGeneva, Switz
Period00/5/2800/5/31

Fingerprint

Digital filters
Computational complexity
Statistics
Processing
Electric power utilization

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Kim, Y. W., Yang, Y. M., Yoo, J. T., & Kim, S-W. (2000). Low-power digital filtering using approximate processing with variable canonic signed digit coefficients. In Proceedings - IEEE International Symposium on Circuits and Systems (Vol. 2). IEEE.

Low-power digital filtering using approximate processing with variable canonic signed digit coefficients. / Kim, Young Woo; Yang, Young Mo; Yoo, Jae Tack; Kim, Soo-Won.

Proceedings - IEEE International Symposium on Circuits and Systems. Vol. 2 IEEE, 2000.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kim, YW, Yang, YM, Yoo, JT & Kim, S-W 2000, Low-power digital filtering using approximate processing with variable canonic signed digit coefficients. in Proceedings - IEEE International Symposium on Circuits and Systems. vol. 2, IEEE, Proceedings of the IEEE 2000 Internaitonal Symposium on Circuits and Systems, Geneva, Switz, 00/5/28.
Kim YW, Yang YM, Yoo JT, Kim S-W. Low-power digital filtering using approximate processing with variable canonic signed digit coefficients. In Proceedings - IEEE International Symposium on Circuits and Systems. Vol. 2. IEEE. 2000
Kim, Young Woo ; Yang, Young Mo ; Yoo, Jae Tack ; Kim, Soo-Won. / Low-power digital filtering using approximate processing with variable canonic signed digit coefficients. Proceedings - IEEE International Symposium on Circuits and Systems. Vol. 2 IEEE, 2000.
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