Hsieh-Wei Lee

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Reconstruction quality maintenance is of the essence for ECG data compression due to the desire for diagnosis use. Quantization schemes with non-linear distortion characteristics usually result in time-consuming quality control that blocks real-time application. In this paper, a new wavelet coefficient quantization scheme based on an evolution program (EP)(More)
The wavelet-based approach that combines a reversible round-off nonrecursive discrete periodized wavelet transform (RRONRDPWT) and the set partitioning in hierarchical trees (SPIHT) scheme is an efficient ECG data compression. However, this RRO-NRDPWT-based system suffers from the high complexity of the SPIHT scheme during realization. In this paper, a(More)
The infiltrative nature of lesions is a significant feature of malignant breast lesion on ultrasound image. Characterizing the infiltrative nature of lesions with computationally inexpensive and highly efficacious features is crucial for the realization of a computer-aided diagnosis system. In this study, the infiltrative nature is regarded as an energy(More)
With high compression performance, realization of wavelet-based data compression system is crucial for multi-lead ECG signal recording. In this paper, a modified run-length coding (MRLC) algorithm associated with an efficient quantization scheme is proposed for the realization of a RRO-NRDPWT-based ECG data compression system. The MRLC with regularity and(More)
The hardware implementation of digital filters is mainly dominated by the multiplier blocks. Implementing constant coefficient digital FIR filters multiplier block as a network of adders, sub tractors, and shifters will achieve lower power consumption. This paper uses the graph representations to reduce designed hardware complexity. To further reduce the(More)
Higher order statistical metric has the capability to extract the signal feature of non-stationary waveforms that the second order statistics can't. This paper proposes an efficient architecture for the frequency domain kurtosis metric, which is an example of the higher order statistics using DWT bit streams. The hardware design methodology emphasizes(More)
With high compression performance, realization of wavelet-based data compression system is significant for multi-lead ECG signal recording. In this paper, we proposed a modified run-length coding (MRLC) algorithm associated with an efficient quantization scheme for the realization of a RRO-NRDPWT-based ECG data compression system. The MRLC has the(More)
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