Basic Investigation on Compression of I/Q Signals for Ultrasonic Diagnostic Equipment
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概要
- 論文の詳細を見る
In ultrasonic diagnostic equipment, I/Q signals are usually used for the construction of B-mode images, displays in the M-mode, and the acquisition of Doppler information. On the other hand, the number of ultrasonic diagnostic equipment in which the digital technique is applied has continuously increased. Accordingly, it is important to understand how I/Q signals are digitized and compressed. In this study, the compression of I/Q signals by wavelet transform is attempted. First, the results are compared with those of a typical compression method by discrete cosine transform (DCT). The proposed method achieved a higher compression ratio than DCT under the same quality of the restored signal. Then, several types of mother wavelets (MWs) are tested. The MW can control the efficiency of compression. The result suggests that the most appropriate MW for I/Q signals compression exists.
- Publication Office, Japanese Journal of Applied Physics, Faculty of Science, University of Tokyoの論文
- 2001-05-30
著者
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Hamamoto Kazuhiko
Department Of Communications Engineering Faculty Of Engineering Tokai University
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Ohta Yuusuke
Department Of Communications Engineering School Of Engineering Tokai Univeristy
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Mochizuki Takashi
Research Laboratory Aloka Co. Ltd.
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Ohta Yuusuke
Department of Communications Engineering, School of Engineering, Tokai University, 1117 Kitakaname, Hiratsuka, Kanagawa 259-1292, Japan
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Mochizuki Takashi
Research Laboratory, Aloka Co., Ltd., 3-7-19 Imai, Ohme, Tokyo 198-8577, Japan
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- Basic Investigation on Compression of I/Q Signals for Ultrasonic Diagnostic Equipment
- Basic Investigation on Compression of I/Q Signals for Ultrasonic Diagnostic Equipment