Have you wondered how “Things” talk to each other and the cloud? Do you understand the alternatives for conveying latency-sensitive real time data versus reliable signaling data? Building on the skills from the Sensing and Actuation course, we will explore protocols to exchange information between processors.
In this course, you will learn how VoIP systems like Skype work and implement your own app for voice calls and text messages. You will start by using the Session Initiation Protocol (SIP) for session management. Next, you will learn how voice codecs such as Adaptive Multi Rate (AMR) are used in 3G networks and use them for voice traffic in your app.
Learning Goals: After completing this course, you will be able to:
1. Implement session initiation, management and termination on your DragonBoard™ 410c using SIP.
2. Discover other users and exchange device capabilities.
3. Compare and contrast narrowband and wideband codecs and experience the voice quality differences between them.
4. Implement and demonstrate VoIP calls using the DragonBoard 410c.
Ce cours fait partie de la Spécialisation Internet des objets
Internet des objets : technologies de la communication
proposé par
Programme du cours : ce que vous apprendrez dans ce cours
Semaine
114 minutes pour terminer
Introduction
Welcome to the Internet of Things! Before diving into this course give us a chance to let you know what it is all about! We will walk you through a module by module outline that will give you highlights on the interesting aspects of the course.
1 vidéo (Total 4 min), 1 lecture
1 vidéo
1 lecture
Course 4 Slides10 min
1 heure pour terminer
Terminology/Cheat Sheet (Beginner)
In this course, you will see a lot of new words and acronyms you might not be familiar with. If you feel comfortable with your knowledge of tech terminology, feel free to skip these lessons since they will not affect the overall integrity of the course. If you see something that you want to know a little more about, feel free to watch the video to gain insight on some basic concepts. We do expect you to know the majority of this material before going into the next module, we would recommend going through the lessons as a quick brush up.
14 vidéos (Total 42 min), 1 quiz
14 vidéos
Acronyms4 min
Frequent Terminology2 min
A look back at Lesson 146s
Introduction to Lesson 21 min
Software Stack4 min
Internet Protocol4 min
Packet-switched Network3 min
A look back at Lesson 22 min
Introduction to Lesson 32 min
PSTN: The Traditional Phone4 min
Linphone Source Code4 min
Codec Selection5 min
A look back at Lesson31 min
1 exercice pour s'entraîner
Module 1 Quiz10 min
Semaine
21 heure pour terminer
VOIP in a Nutshell
This module will take a high level look at what VoIP is in a nutshell. Essentially, we would like to talk a little more in depth about the key terms you may have seen in module 1. We will also go over a great open source VoIP application called Linphone, and explain a variety of ways you can use this open source code to expand on a VoIP application we will be making later on in the course. We will take a look at SIP and look at some online resources that might help you to understand the inner working of VoIP.
17 vidéos (Total 52 min), 1 quiz
17 vidéos
What is VoIP?6 min
Flavors of VoIP3 min
VoIP: Common Applications and Fun Facts5 min
A look back at Lesson 142s
Introduction to Lesson 21 min
What is Linphone?5 min
Linphone Features3 min
Setup2 min
Linphone Essentials2 min
A look back at Lesson 21 min
Introduction to Lesson 31 min
SIP2 min
Protocol Operations4 min
Network Elements6 min
SIP Messages2 min
A look back at Lesson 31 min
1 exercice pour s'entraîner
Module 2 Quiz10 min
Semaine
31 heure pour terminer
Codecs
In this module our esteemed Professor Harinath Garudadri will talk about coders and decoders (Codecs). This will allow us to make better use of the communications in the data plane.We want to look at the motivation behind using Codecs, the different ways to take advantage of redundancies when using codecs and finally the ability to take advantage of different receiver / transmitter combinations. If we are able to understand the way that information is sent and received over the data plane we can create and use the right codecs.
15 vidéos (Total 61 min), 1 quiz
15 vidéos
Introduction to Lesson 11 min
Why compress data?3 min
Why does it work?5 min
What to look for?3 min
Introduction to Lesson 240s
Amplitude - Log Companding (PCM)3 min
Time - Adaptive, Delta Quantization (ADPCM)4 min
Frequency - ADPCM in multiple subbands (Subband ADPCM)3 min
Introduction to Lesson 31 min
Speech production model2 min
Linear Predictive Coding of Speech6 min
2G / 3G Codecs7 min
Voice Quality8 min
VoIP over Wireless7 min
1 exercice pour s'entraîner
Module 3 Quiz12 min
Semaine
41 heure pour terminer
Make your own VoIP application
The main part of this module will focus on you making your very own VoIP application on the Android operating system. In order to do this, you might have to brush up on some of the materials in Course 2. You will be required to use Android Studio to push the application onto your board. You will need to know how to use Git, adb and possibly fastboot in order to accomplish this. We will provide you with the code for your application, but remember, the code we are giving you is only a template that can be used to build a bigger and better application with a wide variety of functions. Once we have built your application and pushed it to your board, we will sit together and brainstorm everything we have seen in the last few courses and take a look at what we are now capable of building in the IoT market.
13 vidéos (Total 43 min), 2 lectures, 1 quiz
13 vidéos
SipProfile2 min
SipManager3 min
A look back at Lesson 11 min
Introduction to Lesson 21 min
Code Walkthrough7 min
Deploy and Demo5 min
A look back at Lesson 21 min
Introduction to Lesson 31 min
VoIP and the Smart Home6 min
VoIP and the Smart Office3 min
Mobile VoIP and EoIP3 min
A look back at Lesson 31 min
2 lectures
Code for the next Lesson.10 min
*Extra: The analog expansion header10 min
1 exercice pour s'entraîner
Module 4 Quiz8 min
4.4
33 avisMeilleurs avis
I liked the topic of communications, I am interested in carrying out developments in IoT and intellectually explore all the components that make up the internet of things.
One of the best University Course in IoT ecosystem . I really liked the assessment of week-4, open option to write about the innovative ideas on IoT.
Enseignants
Ganz Chockalingam
Principal EngineerQualcomm Institute of Calit2, UC, San Diego
Harinath Garudadri
Associate Research ScientistQualcomm Institute of Calit2, UC, San Diego
À propos de Université de Californie à San Diego
UC San Diego is an academic powerhouse and economic engine, recognized as one of the top 10 public universities by U.S. News and World Report. Innovation is central to who we are and what we do. Here, students learn that knowledge isn't just acquired in the classroom—life is their laboratory.
À propos de la Spécialisation Internet des objets
This Specialization covers the development of Internet of Things (IoT) products and services—including devices for sensing, actuation, processing, and communication—to help you develop skills and experiences you can employ in designing novel systems. The Specialization has theory and lab sections. In the lab sections you will learn hands-on IoT concepts such as sensing, actuation and communication. In the final Capstone Project, developed in partnership with Qualcomm, you’ll apply the skills you learned on a project of your choice using the DragonBoard 410c platform.
Foire Aux Questions
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Une fois que vous êtes inscrit(e) pour un Certificat, vous pouvez accéder à toutes les vidéos de cours, et à tous les quiz et exercices de programmation (le cas échéant). Vous pouvez soumettre des devoirs à examiner par vos pairs et en examiner vous-même uniquement après le début de votre session. Si vous préférez explorer le cours sans l'acheter, vous ne serez peut-être pas en mesure d'accéder à certains devoirs.
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Lorsque vous vous inscrivez au cours, vous bénéficiez d'un accès à tous les cours de la Spécialisation, et vous obtenez un Certificat lorsque vous avez réussi. Votre Certificat électronique est alors ajouté à votre page Accomplissements. À partir de cette page, vous pouvez imprimer votre Certificat ou l'ajouter à votre profil LinkedIn. Si vous souhaitez seulement lire et visualiser le contenu du cours, vous pouvez accéder gratuitement au cours en tant qu'auditeur libre.
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