TY - GEN
T1 - Image processing using approximate datapath units
AU - Vasudevan, Madhu
AU - Chakrabarti, Chaitali
PY - 2014/1/1
Y1 - 2014/1/1
N2 - In this paper we present approximate adders and multipliers to reduce the datapath complexity of image processing systems with only a small degradation in PSNR performance. We build upon the approximate circuits proposed in [8] and [9]. We show that selective application of accurate and approximate adders can significantly improve the accuracy of a 2D DCT system. For instance, our implementation of 2D DCT has comparable PSNR performance compared to [8] with 34-50% reduction in area. We also propose an approximate multiplier where the partial products have varying degrees of approximation. Such a multiplier helps improve the accuracy of the system as demonstrated through FFT and Gaussian filter case studies.
AB - In this paper we present approximate adders and multipliers to reduce the datapath complexity of image processing systems with only a small degradation in PSNR performance. We build upon the approximate circuits proposed in [8] and [9]. We show that selective application of accurate and approximate adders can significantly improve the accuracy of a 2D DCT system. For instance, our implementation of 2D DCT has comparable PSNR performance compared to [8] with 34-50% reduction in area. We also propose an approximate multiplier where the partial products have varying degrees of approximation. Such a multiplier helps improve the accuracy of the system as demonstrated through FFT and Gaussian filter case studies.
KW - Approximate adders
KW - approximate multipliers
KW - image processing
UR - http://www.scopus.com/inward/record.url?scp=84907399107&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907399107&partnerID=8YFLogxK
U2 - 10.1109/ISCAS.2014.6865442
DO - 10.1109/ISCAS.2014.6865442
M3 - Conference contribution
AN - SCOPUS:84907399107
SN - 9781479934324
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 1544
EP - 1547
BT - 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2014 IEEE International Symposium on Circuits and Systems, ISCAS 2014
Y2 - 1 June 2014 through 5 June 2014
ER -