Lecture12 - Lecture 12 EE214A Abeer Alwan Some Applications...

Info icon This preview shows pages 1–7. Sign up to view the full content.

1 Lecture 12 EE214A Abeer Alwan Some Applications LPC10 speech coder The SIFT algorithm
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

2 Application Example: Pitch-Excited LPC Transmitter Block Diagram of a Pitch-Excited LPC Receiver
Image of page 2
3 Direct Form Implementation of the Vocal Tract Filter Speech Coding Linear Prediction A ( z ) s ( n ) + d ( n ) s e ( n ) d ( n ) A ( z ) + + s e ( n ) s r ( n ) Try to predict the current sample value; Could also transmit the prediction error .
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

4 Application Example II: The SIFT Algorithm for Pitch Detection Typical Signals from the SIFT Algorithm
Image of page 4
5 2. Covariance method 1 0 ( , ) ( ) ( ) ( , ) N n i k s n i s n k k i n k n k i n s k n s a i n s n s ) ( ) ( ) ( ) ( p k k k i a i i 1 ) , ( ) , 0 ( ) 0 , ( p k k k a E 1 min ) , 0 ( ) 0 , 0 ( Recall: Then, Also, The method requires samples from -p to N-1 2 min ( ) ( ) ( ) k n k n E s n a s n s n k Define and Matrix notation ) 0 , ( ) 0 , 2 ( ) 0 , 1 ( ) , ( ) 1 , ( ) 2 , 2 ( ) 1 , 2 ( ) , 1 ( ) 2 , 1 ( ) 1 , 1 ( 2 1 p a a a p p p p p 1 a a   is symmetric but not Toeplitz (not diagonal)
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

6 AC vs. Covariance Example: Compare the AC and covariance methods for a 1 st -order system.
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.
  • Winter '11
  • ALWAN
  • Gaussian Elimination, linear prediction, Toeplitz, Toeplitz matrix, Levinson recursion, Levinson-Durbin Recursion

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern