1 / 25

In The Name of God The Compassionate The Merciful

In The Name of God The Compassionate The Merciful. Wavelet applications for. Larynx Disorders Diagnosis. Introduction. What is Larynx?. Speech. How do we speak? Speaking is made up of two mechanical actions called Phonation and Articulation.

taima
Download Presentation

In The Name of God The Compassionate The Merciful

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. In The Name of God The Compassionate The Merciful

  2. Wavelet applications for Larynx Disorders Diagnosis

  3. Introduction What is Larynx?

  4. Speech How do we speak? Speaking is made up of two mechanical actions called Phonation and Articulation

  5. Common Larynx Disorders • Muscle Tension Dysphonia (MTD) • Vocal Tremor • Vocal Fold Paralysis

  6. Other Common Disorders • Laryngeal Cancer • Edema • Nodules • Polyp

  7. Voice Characteristics • Amplitude • Frequency • Energy • Entropy • Fractal Dimension

  8. Amplitude • Maximum amplitude to Minimum amplitude ratio

  9. Energy Total Energy Energy in Frames

  10. Energy Application Total Energy • Noise Test • Signal to Noise Ratio( Future Use) Energy in Frames • Recording Environment Characteristics

  11. Entropy • Shannon Entropy • p-Norm Entropy • log-Energy Entropy ✓

  12. Fractal Dimension N∆ is the number of times the signal sign is changed.

  13. Signal The main signal is a 3-second .wav file in which the user simply says “a”

  14. Basic Process 1- Chopping the Signal between two points 2- Segmenting the Chopped Signal

  15. FIR Filters x(n-1) x(n-k) x(n-(N-1)) x(n) Z-1 Z-1 Z-1 y(n) ak a0 a1 aN-1 gain + + +

  16. Filters Coefficients MATLAB Coefficients for db4 Simply Type: fname=‘db4’; LP=dbwavf(fname) HP(k)=(-1)k×LP(K-1-k) WLP(k)=LP(K-1-k) WHP(k)=HP(K-1-k)

  17. Wavelets What are Wavelets? Wavelets are mathematical functions that cut up data into different frequency components, and then study each component with a resolution matched to its scale.

  18. Wavelet Packets Wavelet packets are particular linear combinations of wavelets.

  19. Applied Wavelet Packet LPF DownSample LPF DownSample HPF DownSample Input Signal HPF DownSample LPF DownSample HPF DownSample

  20. Feature Extraction • Energy • Entropy • Fractal Dimension

  21. Applied Wavelet Packet LPF DownSample LPF DownSample HPF DownSample Input Signal HPF DownSample LPF DownSample HPF DownSample

  22. Best Features Vectors

  23. Diagnosis Block W and B are generated from Genetic Algorithm methods

  24. Test Program (Normal)

  25. Test Program (Pathologic)

More Related