Journal ArticleDOI
Memory-Efficient Hardware Architecture of 2-D Dual-Mode Lifting-Based Discrete Wavelet Transform
TLDR
The proposed 2-D dual-mode LDWT architecture has the merits of low transpose memory (TM), low latency, and regular signal flow, making it suitable for very large-scale integration implementation, and can be applied to real-time visual operations such as JPEG2000, motion-JPEG2000, MPEG-4 still texture object decoding, and wavelet-based scalable video coding applications.Abstract:
Memory requirements (for storing intermediate signals) and critical path are essential issues for 2-D (or multidimensional) transforms. This paper presents new algorithms and hardware architectures to address the above issues in 2-D dual-mode (supporting 5/3 lossless and 9/7 lossy coding) lifting-based discrete wavelet transform (LDWT). The proposed 2-D dual-mode LDWT architecture has the merits of low transpose memory (TM), low latency, and regular signal flow, making it suitable for very large-scale integration implementation. The TM requirement of the $N\times N$ 2-D 5/3 mode LDWT and 2-D 9/7 mode LDWT are $2N$ and $4N$ , respectively. Comparison results indicate that the proposed hardware architecture has a lower lifting-based low TM size requirement than the previous architectures. As a result, it can be applied to real-time visual operations such as JPEG2000, motion-JPEG2000, MPEG-4 still texture object decoding, and wavelet-based scalable video coding applications.read more
Citations
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Journal Article
VLSI Implementation of Discrete Wavelet Transform
TL;DR: A VLSI architecture of the recursive pyramid algorithm (RPA) for the DWT is proposed using a group of input delay units and a control unit and the architecture is implemented using only one set of parallel filters.
Journal ArticleDOI
Hardware design of multiclass SVM classification for epilepsy and epileptic seizure detection
TL;DR: A very large scale integration (VLSI) architecture of three-class classification for epilepsy and seizure detection is presented and it is demonstrated that the designed system achieves high accuracy with low-dimensional feature vectors.
Journal ArticleDOI
Stock Prediction by Searching for Similarities in Candlestick Charts
Chih-Fong Tsai,Zen-Yu Quan +1 more
TL;DR: It is found that the extracted feature vectors of 30, 90, and 120, the number of textual features extracted from the candlestick charts in the BMP format, are more suitable for predicting stock movements, while the 90 feature vector offers the best performance for predicting short- and medium-term stock movements.
Journal ArticleDOI
Automatic Detection of Epilepsy and Seizure Using Multiclass Sparse Extreme Learning Machine Classification.
TL;DR: This paper presents a three-class classification system based on discrete wavelet transform and the nonlinear sparse extreme learning machine (SELM) for epilepsy and epileptic seizure detection and shows that the system achieves high enough classification accuracy by combining the SELM and DWT and reduces training and testing time by decreasing computational complexity and feature dimension.
Journal ArticleDOI
Dual-Scan Parallel Flipping Architecture for a Lifting-Based 2-D Discrete Wavelet Transform
Anand D. Darji,Shubham Agrawal,Ankit Oza,Vipul Sinha,Aditya Verma,Shabbir N. Merchant,A.N. Chandorkar +6 more
TL;DR: This proposed novel algorithm is based on a flipping technique to implement a modular and hardware-efficient architecture with a very simple control path to minimize the critical path to one multiplier delay and to achieve 100% hardware utilization efficiency.
References
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Ingrid Daubechies,Wim Sweldens +1 more
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Multifrequency channel decompositions of images and wavelet models
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A VLSI architecture for lifting-based forward and inverse wavelet transform
TL;DR: An architecture that performs the forward and inverse discrete wavelet transform (DWT) using a lifting-based scheme for the set of seven filters proposed in JPEG2000 using an architecture consisting of two row processors, two column processors, and two memory modules.
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