Digital Signal Processing - Revision history

Cmaina at 12:40, 19 August 2015

2015-08-19T12:40:39Z

Cmaina at 13:41, 27 July 2015

2015-07-27T13:41:55Z

Cmaina at 14:25, 29 June 2015

2015-06-29T14:25:34Z

Cmaina at 09:26, 29 June 2015

2015-06-29T09:26:17Z

Cmaina at 09:25, 29 June 2015

2015-06-29T09:25:33Z

Cmaina at 09:24, 29 June 2015

2015-06-29T09:24:05Z

Cmaina at 18:13, 23 March 2015

2015-03-23T18:13:57Z

Cmaina at 16:52, 23 March 2015

2015-03-23T16:52:58Z

Cmaina at 16:49, 23 March 2015

2015-03-23T16:49:00Z

Cmaina at 16:47, 23 March 2015

2015-03-23T16:47:10Z

@@ Line 79: / Line 79: @@
 '''3. &nbsp;Estimation of Fundamental Frequency'''
-In this lab, students will be introduced to extraction of parameters from a speech signal.&nbsp;The laboratory manual can be downloaded here [[File:DSP lab1.pdf|RTENOTITLE]]
+In this lab, students will be introduced to extraction of parameters from a speech signal.&nbsp;The laboratory manual can be downloaded here [[File:DSP lab3.pdf|RTENOTITLE]]
 [[Category:Pages with broken file links]]

@@ Line 27: / Line 27: @@
 '''<span style="font-size:larger;">Preliminary Lab Development</span>''' [[File:Spec.JPG|thumb|Complete experimental setup. A spectrogram of a  recorded utterance is shown on the monitor.]]
 Initial work has been done to test the proposed lab. Since the Raspberry Pi runs a linux OS, we tested the lab by organising a voluntary workshop which required students to bring their own laptops running linux (Ubuntu). In addition, the computers were loaded with
@@ Line 75: / Line 75: @@
 '''2.&nbsp;Speech in the time and frequency domain'''
-This is an introduction to speech processing&nbsp;&nbsp;in the time and frequency domains.&nbsp;The laboratory manual can be downloaded here [[File:DSP lab1.pdf|RTENOTITLE]]
+This is an introduction to speech processing&nbsp;&nbsp;in the time and frequency domains.&nbsp;The laboratory manual can be downloaded here [[File:DSP lab2.pdf|RTENOTITLE]]
 '''3. &nbsp;Estimation of Fundamental Frequency'''

← Older revision		Revision as of 14:25, 29 June 2015
Line 27:		Line 27:


−	'''<span style="font-size:larger;">Preliminary Lab Development</span>''' [[File:Spec.JPG\|thumb\|Complete experimental setup. A spectrogram of a recorded utterance is shown on the monitor.]] Initial work has been done to test the proposed lab. Since the Raspberry Pi runs a linux OS, we tested the lab by organising a voluntary workshop which required students to bring their own laptops running linux (Ubuntu). In addition, the computers were loaded with	+	'''<span style="font-size:larger;">Preliminary Lab Development</span>''' [[File:Spec.JPG\|thumb\|Complete experimental setup. A spectrogram of a recorded utterance is shown on the monitor.]]
		+
		+	Initial work has been done to test the proposed lab. Since the Raspberry Pi runs a linux OS, we tested the lab by organising a voluntary workshop which required students to bring their own laptops running linux (Ubuntu). In addition, the computers were loaded with

	#Octave- A high level language suitable for numerical computations that is quite similar to Matlab. We will also require the signals package.		#Octave- A high level language suitable for numerical computations that is quite similar to Matlab. We will also require the signals package.

@@ Line 67: / Line 67: @@
 There will be three laboratory exercises. They are
-. Introduction to Octave.&nbsp;
+'''1. Introduction to Octave.'''&nbsp;
-Here the students will be introduced to the Octave programming language. The laboratory manual can be downloaded here [[File:DSP_lab1.pdf]]
+Here the students will be introduced to the Octave programming language. The laboratory manual can be downloaded here [[File:DSP lab1.pdf|RTENOTITLE]]
-.&nbsp;Speech in the time and frequency domain
+'''2.&nbsp;Speech in the time and frequency domain'''
-This is an introduction to speech processing&nbsp;&nbsp;in the time and frequency domains.&nbsp;The laboratory manual can be downloaded here [[File:DSP_lab1.pdf]]
+This is an introduction to speech processing&nbsp;&nbsp;in the time and frequency domains.&nbsp;The laboratory manual can be downloaded here [[File:DSP lab1.pdf|RTENOTITLE]]
-. &nbsp;Estimation of Fundamental Frequency
+'''3. &nbsp;Estimation of Fundamental Frequency'''
-In this lab, students will be introduced to extraction of parameters from a speech signal.&nbsp;The laboratory manual can be downloaded here [[File:DSP_lab1.pdf]]
+In this lab, students will be introduced to extraction of parameters from a speech signal.&nbsp;The laboratory manual can be downloaded here [[File:DSP lab1.pdf|RTENOTITLE]]

@@ Line 69: / Line 69: @@
 . Introduction to Octave.&nbsp;
-Here the students will be introduced to the Octave programming language. The laboratory manual can be downloaded here &#x5B;&#x5B;file:DSP_lab1.pdf&#x5D;&#x5D;
+Here the students will be introduced to the Octave programming language. The laboratory manual can be downloaded here [[File:DSP_lab1.pdf]]
 .&nbsp;Speech in the time and frequency domain
-This is an introduction to speech processing&nbsp;&nbsp;in the time and frequency domains.&nbsp;The laboratory manual can be downloaded here &#x5B;&#x5B;file:DSP_lab2.pdf&#x5D;&#x5D;
+This is an introduction to speech processing&nbsp;&nbsp;in the time and frequency domains.&nbsp;The laboratory manual can be downloaded here [[File:DSP_lab1.pdf]]
 . &nbsp;Estimation of Fundamental Frequency
-In this lab, students will be introduced to extraction of parameters from a speech signal.&nbsp;The laboratory manual can be downloaded here &#x5B;&#x5B;file:DSP_lab3.pdf&#x5D;&#x5D;
+In this lab, students will be introduced to extraction of parameters from a speech signal.&nbsp;The laboratory manual can be downloaded here [[File:DSP_lab1.pdf]]

@@ Line 2: / Line 2: @@
 [[File:Boot.JPG|thumb|Raspberry Pi and accessories.]]
 #Discrete time signals and systems
 #Linear time invariant (LTI) systems
@@ Line 26: / Line 27: @@
-'''<span style="font-size:larger;">Preliminary Lab Development</span>'''
+'''<span style="font-size:larger;">Preliminary Lab Development</span>''' [[File:Spec.JPG|thumb|Complete experimental setup. A spectrogram of a  recorded utterance is shown on the monitor.]] Initial work has been done to test the proposed lab. Since the Raspberry Pi runs a linux OS, we tested the lab by organising a voluntary workshop which required students to bring their own laptops running linux (Ubuntu). In addition, the computers were loaded with
 #Octave- A high level language suitable for numerical computations that is quite similar to Matlab. We will also require the signals package.
@@ Line 37: / Line 36: @@
 A worksheet was prepared for use by the students and to guide them through the lab. It was designed to be hands on with students making recordings of their own voice and manipulating the recorded audio on Octave.&nbsp;
 After the workshop, an anonymous online survey [https://www.surveymonkey.com/s/JD7JTJ5 [1]] was conducted using surveymonkey to get feedback and help improve future workshops. The results of the survey were used to &nbsp;fine tune the Raspberry Pi labs.
 <br/><span style="font-size:larger;">'''Raspberry Pi Based Laboratory'''</span>
@@ Line 61: / Line 60: @@
 #Octave signals package: Type sudo apt-get install octave-signal
 #SoX: Type sudo apt-get install sox

@@ Line 1: / Line 1: @@
 Students at DeKUT are currently taught digital signal processing (DSP) in the final year of their five year program. The aim of the course is to introduce the student to a number of fundamental DSP concepts including:
 #Discrete time signals and systems
 #Linear time invariant (LTI) systems
@@ Line 17: / Line 18: @@
 Human speech is arguably one of the most important signals encountered in engineering applications. Numerous devices record and manipulate speech signals to achieve different ends. To properly manipulate the signal, it is important to have an understanding of the speech production process. The lungs, vocal tract and vocal cords all play an important role in speech production. The speech production model consists of an input signal from the lungs and a linear filter. &nbsp;In this model, the input is a white noise process which is spectrally flat. This input is then spectrally shaped by a filter which models the properties of the vocal tract. Since the properties of the vocal tract are constantly changing as different sounds are produced, the filter is time varying. However, the filter is often modelled as quasi-stationary with filter parameters constant over a period of approximately 32ms.&nbsp;When the vocal cords vibrate as is the case when pronouncing the sound /a/ in cat, we say that the sound is voiced and in this case the signal is seen to be exhibit some periodicity. When the vocal cords do not vibrate the sound is unvoiced.
+[[File:Mic.JPG|thumb|USB Microphone.]] [[File:Monitor.JPG|thumb|7 inch HDMI monitor.]]
 '''Estimation of Fundamental Frequency'''
@@ Line 26: / Line 27: @@
 '''<span style="font-size:larger;">Preliminary Lab Development</span>'''
+[[File:Spec.JPG|thumb|Complete experimental setup. A spectrogram of a  recorded utterance is shown on the monitor.]]
 Initial work has been done to test the proposed lab. Since the Raspberry Pi runs a linux OS, we tested the lab by organising a voluntary workshop which required students to bring their own laptops running linux (Ubuntu). In addition, the computers were loaded with
@@ Line 36: / Line 37: @@
 A worksheet was prepared for use by the students and to guide them through the lab. It was designed to be hands on with students making recordings of their own voice and manipulating the recorded audio on Octave.&nbsp;
-After the workshop, an anonymous online survey [https://www.surveymonkey.com/s/JD7JTJ5 [1]] was conducted using surveymonkey to get feedback and help improve future workshops. The results of the survey were used to &nbsp;fine tune the Raspberry Pi labs. [[File:Mic.JPG|thumb|USB Microphone.]] [[File:Monitor.JPG|thumb|7 inch HDMI monitor.]]
+After the workshop, an anonymous online survey [https://www.surveymonkey.com/s/JD7JTJ5 [1]] was conducted using surveymonkey to get feedback and help improve future workshops. The results of the survey were used to &nbsp;fine tune the Raspberry Pi labs.
 <br/><span style="font-size:larger;">'''Raspberry Pi Based Laboratory'''</span>
@@ Line 51: / Line 52: @@
 #Raspberry Pi Compatible Keyboard and Mouse
-[[File:Spec.JPG|thumb|Complete experimental setup. A spectrogram of a  recorded utterance is shown on the monitor.]]
 <span style="font-size:medium;">'''Set-up'''</span>

@@ Line 37: / Line 37: @@
 After the workshop, an anonymous online survey [https://www.surveymonkey.com/s/JD7JTJ5 [1]] was conducted using surveymonkey to get feedback and help improve future workshops. The results of the survey were used to &nbsp;fine tune the Raspberry Pi labs.
+[[File:Mic.JPG|thumb|USB Microphone.]] [[File:Monitor.JPG|thumb|7 inch HDMI monitor.]]
@@ Line 46: / Line 46: @@
 <span style="font-size:medium;">'''Equipment'''</span>
 #Raspberry Pi Model B+