琉球大学 教務情報システム
2014年11月18日
シラバス詳細
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音響信号処理特論
科目番号
履修年度
2014年後期
開設学部等 理工学研究科(後期) 総合知能工学専攻 電子情報工学
期間
後期
曜日時限 火曜日4時限 工1-509
単位数
2
担当教員 アシャリフモハマッド
講義コード
R0015500
■授業内容と方法
音響信号処理特論
Advanced  Acoustic  Signal  Processing:In  this  lecture  we  are  study  about  Acoustic  Speech  Signal  Processing.  First,  the  mechanism  of  human  speech  production  and  acoustic  phonetics  such  as  vowels,  the  vowel  triangle,  front,  mid,  back,  diphthongs,  semivowels,  liquids,  glides,  consonants,  nasals,  stops  (Voiced,  Unvoiced),  fricatives  (voiced,  unvoiced),  whisper,  afficates  are  explained.  Then,  the  acoustic  theory  of  speech  production,  sound  propagation  Portnoff  ?  Sondhi  differential  equations,  uniform  lossless  tube  and  formants,  effects  of  losses  in  the  vocal  tract,  the  effect  of  nasal  coupling,  excitation  of  sound  in  the  vocal  tract,  lossless  tube  models,  wave  propagation  in  concatenated  lossless  tubes,  relationship  to  digital  filter  and  digital  model  for  speech  signals  are  explained.  Next,  time-domain  methods  for  speech  processing,  short-time  energy,  zero-crossing  rate,  speech  vs.  silence  discrimination,  pitch  period  estimation,  short-time  autocorrelation  function,  short-time  average  magnitude  difference  function  (AMDF),  pitch  period  estimation  using  the  autocorrelation  function,  median  smoothing  are  explained.  Then,  digital  representation  of  the  speech  waveform,  PCM,  MPCM,  Adaptive  quantization,  Delta  modulation  DPCM,  ADPCM  will  be  discussed.  Next,  Homomorphic  speech  processing,  Cepstrum,  pitch  detection,  formal  estimation,  Homomorphic  vocoder  are  aimed  for  studies.  Also,  Linear  Predictive  Coding  (LPC)  of  speech,  LPC  analysis,  the  autocorrelation  method,  the  covariance  method,  computation  of  gain  for  LPC  model,  Cholesky  decomposition  solution  of  LPC  equations,  Durbin’s  recursive  solution,  lattice  formulations,  the  prediction  error  signal,  relation  between  the  various  speech  parameters,  synthesis  of  speech  from  LP  parameters,  pitch  and  formant  analysis  using  LPC,  LPC  vocoder  are  presented.  At  last,  digital  speech  processing  for  Man-Machine  Communication  by  voice  and  special  projects  in  Acoustic  Echo  and  Noise  Cancellation  ,  etc.  will  be  studied.
 
■達成目標
Digital  Processing  of  Speech  Signal:
To  know  about  the  mechanism  of  human  speech  production  and  acoustic  phonetics.
To  know  about  the  acoustic  theory  of  speech  production  and  relationship  to  digital  filter
To  know  about  time-domain  methods  for  speech  processing,  pitch  period  estimation.
To  know  about  digital  representation  of  the  speech  waveform.
To  know  about  Homomorphic  speech  processing  &  Linear  Predictive  Coding,  synthesis  of  speech  from  LP  parameters
To  know  about  Man-Machine  Communication  by  voice,  Acoustic  Echo  and  Noise  Cancellation  by  Adaptive  Digital  Filter  Algorithms  etc
 
■評価基準と評価方法
Project  &  Presentation  &  Report  
■履修条件
 
■授業計画
1Introduction  to  speech  and  signal  processing
2The  mechanism  of  human  speech  production.  
3Phonems  in  American  English,  Vowel  triangle,  Diphthongs,  Liquids,  Glides.
4Consonants,  Nasals,  Stops,  Fricatives,  Whisper,  Afficates.
5Sound  propagation  Portnoff?Sondhi  equations,  Lossless  tube,  Formants,  Losses.
6Nasal  coupling,  Excitation,  Digital  model  for  speech  signals.
7Energy,  Zero  Crossing,  Silence,  Pitch.
8Autocorrelation,  AMDF.
9Pitch  period  estimation,  Median  smoothing.
10PCM,  Adaptive  quantization,  Delta  modulation.
11Homomorphic  Speech  Processing,  Cepstrum,  Pitch  detection,  Formal  estimation,  The  Homomorphic  Vocoder
12LPC  of  speech,  Autocorrelation  method
13Covariance  method,  Computation  of  gain  for  LPC  model.
14Cholesky,  Durbin,  Lattice  formulations
15The  Prediction  Error  Signal,  Synthesis  of  speech  from  LP  parameters,  Pitch  and  formant  by  LPC,  LPC  vocoder.
16Man-Machine  Communication  by  voice,  Special  Projects  in  Acoustic  Echo  and  Noise  Cancellation,  etc.  
■事前・事後学習
 
■教科書 ISBN
Digital Processing of Speech Signal, L.R. Rabiner/R.W. Schafer, Prentice Hall 0132136031
 
■参考書 ISBN
 
■備考(メッセージ)
 
■オフィスアワー
Tue  3:00-5:00  P.M.,  Fri  3:00-5:00  P.M.  
■メールアドレス
asharif@ie.u-ryukyu.ac.jp
 
■URL
http://www.ie.u-ryukyu.ac.jp/~asharif