Wavelet-denoising on hardware devices with Perfect Reconstruction, low latency and adaptive thresholding

Hardware Design of the Discrete Wavelet Transform: an Analysis of Complexity, Accuracy and Operating Frequency

“…An example of multiplierless-based topology and integer quantization of the weights of the filter is found in the work of Ballesteros and Moreno [28]. In that case, they use left-shift, right-shift, delay, and split units to compute the wavelet base 5/3.…”

“…Design of the hardware implementation of the DWT has several choices. In terms of the method, it is carried out within non-polyphase (convolutionbased) [27], polyphase [28], [29], [30], [31] or lifting schemes [32], [33], [34]. In terms of the topology, the schemes are multiplier-based [27], [35], [36], [37], [38], [39] or multiplierless-based [28], [29], [30], [31], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49].…”

“…In terms of the method, it is carried out within non-polyphase (convolutionbased) [27], polyphase [28], [29], [30], [31] or lifting schemes [32], [33], [34]. In terms of the topology, the schemes are multiplier-based [27], [35], [36], [37], [38], [39] or multiplierless-based [28], [29], [30], [31], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49]. In terms of the quantization of the filters weights, the system can work with floating-point data [35], fixed-point data [27], [36], [37,41], Canonical Signed Digit (CDS) [30], [31], [40] or integer data [28], [29], [42], [43], [44], [45].…”

“…In terms of the topology, the schemes are multiplier-based [27], [35], [36], [37], [38], [39] or multiplierless-based [28], [29], [30], [31], [40], [41], [42], [43], [44], [45], [46], [47], [48], [49]. In terms of the quantization of the filters weights, the system can work with floating-point data [35], fixed-point data [27], [36], [37,41], Canonical Signed Digit (CDS) [30], [31], [40] or integer data [28], [29], [42], [43], [44], [45]. Finally, structure is conventional [27], [28], [29], [30], [31], [40], [42], [43], [44], [45] or pipelined-based [41], [50], [51], [52], [53],…”

“…In terms of the quantization of the filters weights, the system can work with floating-point data [35], fixed-point data [27], [36], [37,41], Canonical Signed Digit (CDS) [30], [31], [40] or integer data [28], [29], [42], [43], [44], [45]. Finally, structure is conventional [27], [28], [29], [30], [31], [40], [42], [43], [44], [45] or pipelined-based [41], [50], [51], [52], [53], [54], [55].…”