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랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
랩세미나 20070920
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랩세미나 20070920

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Transcript

  • 1. Session: Wideband Speech Coding Presenter: Young Han Lee
  • 2. <ul><li>Objective Analysis of the Effect of Memory Inclusion on Bandwidth Extension of Narrowband Speech </li></ul><ul><li>Artificial Bandwidth Extension without Side Information for ITU-T G.729.1 </li></ul><ul><li>The Effect of Highband Harmonic Structure in the Artificial Bandwidth Expansion of Telephone Speech </li></ul>
  • 3. <ul><li>Artificial Bandwidth Extension for Speech Signals using Speech Recognition </li></ul><ul><li>Voicing-Based Codebook in Low-Rate Wideband CELP Coding </li></ul><ul><li>Performance of Speaker-Dependent Wideband Speech Coding </li></ul>
  • 4. <ul><li>Main Idea </li></ul><ul><ul><li>Wideband Extension without extra information </li></ul></ul>< Proposed structure >
  • 5. <ul><li>Original BWE Scheme </li></ul><ul><li>HF Parameter Estimation </li></ul><ul><ul><li>MMSE Estimation for TDBWE parameter </li></ul></ul>
  • 6. <ul><li>Result </li></ul><ul><ul><li>Spectrum </li></ul></ul><ul><ul><li>No Listening test </li></ul></ul><ul><ul><ul><li>Worse than original </li></ul></ul></ul><ul><ul><ul><li>Muffled, limited dynamic range. </li></ul></ul></ul>
  • 7. <ul><li>Main Idea </li></ul><ul><ul><li>Reproduce voiced sounds </li></ul></ul>
  • 8. <ul><li>Main Idea </li></ul><ul><ul><li>Ptich-adaptive modulation </li></ul></ul>
  • 9. <ul><li>Result </li></ul><ul><ul><li>AMR-WB based </li></ul></ul><ul><ul><li>Finnish and Chinese </li></ul></ul><ul><ul><li>CCR test </li></ul></ul>
  • 10. <ul><li>Result </li></ul><ul><ul><li>ABX test </li></ul></ul>
  • 11. <ul><li>Main Idea </li></ul><ul><ul><li>Wideband Estimate from speech recognition </li></ul></ul>
  • 12. <ul><li>Proposed method </li></ul>
  • 13.  
  • 14. <ul><li>Result </li></ul>
  • 15. <ul><li>Main Idea </li></ul><ul><ul><li>New Vocing-based Vector Quantization </li></ul></ul><ul><ul><ul><li>1/3 codebook entry </li></ul></ul></ul><ul><ul><ul><li>Processing delay is reduced </li></ul></ul></ul><ul><ul><ul><li>Implemented in an ACELP Wideband coder </li></ul></ul></ul>
  • 16. <ul><li>Main Idea </li></ul>
  • 17. <ul><li>Main Idea </li></ul><ul><ul><li>Conditional Codebook </li></ul></ul><ul><ul><ul><li>Voiced-speech CodeBook </li></ul></ul></ul><ul><ul><ul><li>Unvoiced-speech CodeBook </li></ul></ul></ul><ul><ul><ul><li>Third CodeBook </li></ul></ul></ul><ul><ul><ul><ul><li>For transition speech. </li></ul></ul></ul></ul>
  • 18. <ul><li>Result </li></ul><ul><ul><li>SegSBR </li></ul></ul><ul><ul><li>Spectral Distortion </li></ul></ul>
  • 19.  

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