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  •  An-Najah National University

    Faculty of Engineering and Information Technology
    

    Telecommunication Engineering Department

    Speech Processing                  

     

    Course number : 69451

    Instructor : Dr. Allam Mousa

    Compulsory / Elective : Compulsory course

    Prerequisites : 69441 Digital Signal Processing

     

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    Course description :

    This course discusses the concept of speech processing and some of its applications. This includes; acoustic theory of speech production, discrete time models of speech production, time and frequency domain analysis techniques. It also discusses approaches in speech analysis, speech synthesis, speech coding and more applications on speech and audio signals.

     

    Course Objectives:

    The main purpose of this course is to provide the learners with solid fundamental tools and experience on the applied technology in the array of speech processing. It also gives the opportunity to deepen and widen the understanding of this topic through the study of speech characteristics and its applications in various fields like coding. The course is one of the interesting applications of signal processing. 

      

    Intended learning Outcomes and Competences: 

    At the end of this course students should be able to;

    1. Analyze and design algorithms for extracting parameters from the speech signal.                                                 

    2. Analyze and design algorithms for speech and audio coding.

    3. Prepare related research                                         

        

       For full outline click here

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    Forum

    News forum

• Section 1

  Topic One :Introduction to Digital Speech Processing

  • Introduction :

    This part of the course aims at introduing the concept of Speech and Audio Processing. This includes the speech production mechanism.

     

     Objectives :

    1. Aquire the concept of speech production machanism.

    2. Identify the importance of speech processing .

    3. lable the types of speech signal.

        

    Plan :

    First: Study the topic presentation .

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    Fichier

    Introduction to Digital Speech Processing Fichier
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    Second: Consider the next vedio wich shows the speech production mechanism

    
    

    
    
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    Third : Attend the following live lecture on Speech Processing and modeling

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    Fourth :Do the following assignment.

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    Devoir

    Assignment 1:Introduction to Digital Speech Processing Devoir
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    Fifth:Join the discussion forum.

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    Forum

    Forum 1

• Section 2

  Topic Two :Introduction to Speech Coding What, Why, Where & How

  • Introduction:

    It is aimed hear to write the speech signal in a proper format suitable for transmission or storage. Being speech, this signal has special characteristic which  enables us to remove redundancy. Speech coders are classified into several categories and Speech Coding Hierarchy is discussed. Mobile Speech coder is introduced as an example.

     

    Objectives :

    The main objectives of this topic are;

    1. Define speech coding

    2. Discuss speech coding principles

    3. Illustrate speech coding hierarchy

    4. Label quantization methods

    5. Indicate mobile communication speech coder

     

    Plan:

    First :Study the topic presentation .

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    Fichier

    Introduction to Speech Coding Fichier
  • Second :Study the following animation to define the "speech coding" and identify the steps involved in speech coding and do the included test  .

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    Fichier

    speech coding Fichier
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    Third: THIS IS AN EXTRA TOPIC. It shows the channel coding concept of Mobile System. 

    Study the following animation to define the term "channel coding", describe the channel coding proces, distinguish the different speech bit classes and identify the significance of control channel signaling data . Source coding removes redundancy but channel coding increaes redundancy

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    Fichier

    channel coding Fichier
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    Fourth:Join the discussion forum.

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    Forum

    Forum 2

• Section 3

  Topic Three :Quantization Techniques

  • Introduction :

    Analogue signal is sampled then it becomes discrete in time but not digital. Quantization is used to discretize the amplitudes of theses samples. Quantization introduces some error and so SNR at the output of the quantizer is considered.

    
    

    Objectives:

    1. Identify quantization

    2. Know quantization methods

    3. Decide on the quality of the quantized signal

     

    Plan:

    First:Study the following file about Quantization Techniques
    

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    Fichier

    Quantization Techniques. Fichier
  • Second :Watch the following video about what is quantization

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    Third :See the following video to understand quantization

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    Fourth :Use the following animation which illustrates the quantization of an analog signal. The original signal could be voice, audio, music or any other analog signals that may be converted into digital wavefrm .

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    Fichier

    PCM Fichier
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    Fifth:Join the discussion forum.

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    Forum

    Forum 3

• Section 4

  Topic Four : GSM Speech Coding

  • Introduction :

    An important application of speech coding is used in mobile communication systems. It is required to compress the speech signal to meet the Mobile channel limitations and resources restrictions.

       

    Objectives:

    Lable the components of sppech coder used in mobile communications

     

    Plan:

    First :Study the topic presentation .

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    Fichier

    GSM Speech Coding Fichier
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    Second :See the following video about gsm, about  how it work.

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    Third:Join the discussion forum.

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    Forum

    Forum 4

• Section 5

  Topic Five :Speech Compression

  • Introduction :

    Speech compression is an important application of speech processing. Redanduncy should be removed from the signal. Several compresion methods are presented. 

     

    Objectives:

    1. Aquire why speech compression.

    2. Know the concept of  Analysis-synthesis

    3. Aquire the Analysis-by-synthesis

    4. Clasify  subjective test / objective test

    Plan:

    First :Study the topic presentation .

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    Fichier

    Compression Fichier
  • Second :Show  the following  video for Arabic characters Speech Production Mechanism

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    Third : See the next link for Synthetic Mouth which Can Mimic Human Speech.

    Synthetic Mouth

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    Fourth:Join the discussion forum.

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    Forum

    Forum 5

• Section 6

  Topic Six :Speech Analysis and Modiling

  • Introduction :

    Natural speech production mechanism may be modeled in several ways. Here, we will check see how to analyse the speech using certain windowing methods, then it is required to study some models of Speech production

     

    Objectives:

    1. Acquire the importance of speech analysis.

    2. Know the windowing concept and types

    3. Classify speech production models

      

    Plan:

    First : Study the following topic on analysi

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    Fichier

    Analysis and Modiling Fichier

       

  • Second : Study the following topic on windowing

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    URL

    Windowing URL
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    Third : Answer the question on the mobile communication speech encoders

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    Devoir

    Mobile comm. Speech encoders Devoir
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    Fichier

    Solution to LPC Fichier

• Section 7

  Topic Seven :LPC Transformation

  • Introduction :

    Speech parameters are to be quantized and encoded properly. Hence, LPC parameters may not be suitable for all kinds of processing. Hence, other forms of such parametrs should be considered

     

    Objectives:

    1. Acquire the importance of other forms of coefficints.

    2. Being able to transfer the cofficients int other forms like LAR, PARCOR,..

       

    Plan:

    First : Study the following topic

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    Fichier

    LPC Transformation Fichier

• Section 8

  Topic Eight : Pitch Period Determination

  • Introduction :

    Pitch period is an important feature of speech. It has to be determined as accurate as possible. This topic discusses several related issues.

     

    Objectives:

    Acquire various methods for Pitch period estimation

     

    Plan:

    First : Study the following topic

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    Fichier

    Pitch Determination Fichier

• Section 9
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    classroom acoustics topic1 Fichier

• Section 10

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• Section 16

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