Essays about: "scalogram"

Found 3 essays containing the word scalogram.

  1. 1. Digital Signal Characterization for Seizure Detection Using Frequency Domain Analysis

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Jing Li; [2021]
    Keywords : Fourier Transform; Wavelet Transform; EEG and ECG Anomaly Detection; Approximate Entropy; Hellinger Distance; Long Short- Term Memory; Fourier Transform; Wavelet Transform; EEG och ECG Anomalidetektion; Approximativ Entropi; Hellinger Distans; Lång Korttidsminne;

    Abstract : Nowadays, a significant proportion of the population in the world is affected by cerebral diseases like epilepsy. In this study, frequency domain features of electroencephalography (EEG) signals were studied and analyzed, with a view being able to detect epileptic seizures more easily. READ MORE

  3. 2. An Application of the Continuous Wavelet Transform to Financial Time Series

    University essay from Lunds universitet/Institutionen för elektro- och informationsteknik

    Author : Klas Eliasson; [2018]
    Keywords : Wavelets; Continuous Wavelet Transform; CWT; Financial Time Series; Currency Trading; Technology and Engineering;

    Abstract : Wavelet theory, which shares fundamental concepts with windowed Fourier analysis, introduces the notion of scale in an effort to aid in joint time-frequency analysis. Having century-old roots, much of the essential research on the subject of wavelets was conducted during the 1970s and 1980s. READ MORE

  4. 3. Audio editing in the time-frequency domain using the Gabor Wavelet Transform

    University essay from Centrum för bildanalys

    Author : Ulf Hammarqvist; [2011]
    Keywords : Wavelet transform; time-frequency analysis; audio engineering; signal processing; audio restoration; audio interpolation; pitch-shift; time-stretch; loglet; compression; down-sampling; visualization; fourier transform; convolution; filter bank; digital filters; noise reduction; re-assignment; gabor transform; scalogram;

    Abstract : Visualization, processing and editing of audio, directly on a time-frequency surface, is the scope of this thesis. More precisely the scalogram produced by a Gabor Wavelet transform is used, which is a powerful alternative to traditional techinques where the wave form is the main visual aid and editting is performed by parametric filters. READ MORE