A Low-Power A/D Conversion Technique Using Correlation of Moving Pictures

Shoji KAWAHITO; Junichi NAKA; Yoshiaki TADOKORO

A Low-Power A/D Conversion Technique Using Correlation of Moving Pictures

Shoji KAWAHITO, Junichi NAKA, Yoshiaki TADOKORO

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This paper presents a low-power video A/D conversion technique using features of moving pictures. Neighboring frames in typical video sequences and neighboring pixels in each video frame are highly correlated. This property is effectively used for the video A/D conversion to reduce the number of comparators and the resulting power consumption. A set of reference voltages is given to a comparator array so that the iterative A/D conversion converges in the logarithmic order of the prediction error. Simulation results using standard moving pictures showed that the average number of iterations for the A/D conversion is less than 3 for all the moving pictures tested. In the proposed 12 b A/D converter, the number of comparators can be reduced to about 1/5 compared with that of the two-step flash A/D converters, which are commonly used for video applications. The A/D converter is particularly useful for the integration to CMOS image sensors.

Publication: IEICE TRANSACTIONS on Electronics Vol.E82-C No.9 pp.1764-1771

Publication Date: 1999/09/25

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Type of Manuscript: Special Section PAPER (Special Issue on Integrated Electronics and New System Paradigms)

Category: Imaging Circuits and Algorithms

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Shoji KAWAHITO, Junichi NAKA, Yoshiaki TADOKORO, "A Low-Power A/D Conversion Technique Using Correlation of Moving Pictures" in IEICE TRANSACTIONS on Electronics, vol. E82-C, no. 9, pp. 1764-1771, September 1999, doi: .
Abstract: This paper presents a low-power video A/D conversion technique using features of moving pictures. Neighboring frames in typical video sequences and neighboring pixels in each video frame are highly correlated. This property is effectively used for the video A/D conversion to reduce the number of comparators and the resulting power consumption. A set of reference voltages is given to a comparator array so that the iterative A/D conversion converges in the logarithmic order of the prediction error. Simulation results using standard moving pictures showed that the average number of iterations for the A/D conversion is less than 3 for all the moving pictures tested. In the proposed 12 b A/D converter, the number of comparators can be reduced to about 1/5 compared with that of the two-step flash A/D converters, which are commonly used for video applications. The A/D converter is particularly useful for the integration to CMOS image sensors.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e82-c_9_1764/_p

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@ARTICLE{e82-c_9_1764,
author={Shoji KAWAHITO, Junichi NAKA, Yoshiaki TADOKORO, },
journal={IEICE TRANSACTIONS on Electronics},
title={A Low-Power A/D Conversion Technique Using Correlation of Moving Pictures},
year={1999},
volume={E82-C},
number={9},
pages={1764-1771},
abstract={This paper presents a low-power video A/D conversion technique using features of moving pictures. Neighboring frames in typical video sequences and neighboring pixels in each video frame are highly correlated. This property is effectively used for the video A/D conversion to reduce the number of comparators and the resulting power consumption. A set of reference voltages is given to a comparator array so that the iterative A/D conversion converges in the logarithmic order of the prediction error. Simulation results using standard moving pictures showed that the average number of iterations for the A/D conversion is less than 3 for all the moving pictures tested. In the proposed 12 b A/D converter, the number of comparators can be reduced to about 1/5 compared with that of the two-step flash A/D converters, which are commonly used for video applications. The A/D converter is particularly useful for the integration to CMOS image sensors.},
keywords={},
doi={},
ISSN={},
month={September},}

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TY - JOUR
TI - A Low-Power A/D Conversion Technique Using Correlation of Moving Pictures
T2 - IEICE TRANSACTIONS on Electronics
SP - 1764
EP - 1771
AU - Shoji KAWAHITO
AU - Junichi NAKA
AU - Yoshiaki TADOKORO
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E82-C
IS - 9
JA - IEICE TRANSACTIONS on Electronics
Y1 - September 1999
AB - This paper presents a low-power video A/D conversion technique using features of moving pictures. Neighboring frames in typical video sequences and neighboring pixels in each video frame are highly correlated. This property is effectively used for the video A/D conversion to reduce the number of comparators and the resulting power consumption. A set of reference voltages is given to a comparator array so that the iterative A/D conversion converges in the logarithmic order of the prediction error. Simulation results using standard moving pictures showed that the average number of iterations for the A/D conversion is less than 3 for all the moving pictures tested. In the proposed 12 b A/D converter, the number of comparators can be reduced to about 1/5 compared with that of the two-step flash A/D converters, which are commonly used for video applications. The A/D converter is particularly useful for the integration to CMOS image sensors.
ER -