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.
Этот курс входит в специализацию ''Специализация Интернет вещей'
Интернет вещей: коммуникационные технологии
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Программа курса: что вы изучите
Неделя
114 минуты на завершение
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 видео ((всего 4 мин.)), 1 материал для самостоятельного изучения
1 видео
1 материал для самостоятельного изучения
Course 4 Slides10мин
1 ч. на завершение
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 видео ((всего 42 мин.)), 1 тест
14 видео
Acronyms4мин
Frequent Terminology2мин
A look back at Lesson 146
Introduction to Lesson 21мин
Software Stack4мин
Internet Protocol4мин
Packet-switched Network3мин
A look back at Lesson 22мин
Introduction to Lesson 32мин
PSTN: The Traditional Phone4мин
Linphone Source Code4мин
Codec Selection5мин
A look back at Lesson31мин
1 практическое упражнение
Module 1 Quiz10мин
Неделя
21 ч. на завершение
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 видео ((всего 52 мин.)), 1 тест
17 видео
What is VoIP?6мин
Flavors of VoIP3мин
VoIP: Common Applications and Fun Facts5мин
A look back at Lesson 142
Introduction to Lesson 21мин
What is Linphone?5мин
Linphone Features3мин
Setup2мин
Linphone Essentials2мин
A look back at Lesson 21мин
Introduction to Lesson 31мин
SIP2мин
Protocol Operations4мин
Network Elements6мин
SIP Messages2мин
A look back at Lesson 31мин
1 практическое упражнение
Module 2 Quiz10мин
Неделя
31 ч. на завершение
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 видео ((всего 61 мин.)), 1 тест
15 видео
Introduction to Lesson 11мин
Why compress data?3мин
Why does it work?5мин
What to look for?3мин
Introduction to Lesson 240
Amplitude - Log Companding (PCM)3мин
Time - Adaptive, Delta Quantization (ADPCM)4мин
Frequency - ADPCM in multiple subbands (Subband ADPCM)3мин
Introduction to Lesson 31мин
Speech production model2мин
Linear Predictive Coding of Speech6мин
2G / 3G Codecs7мин
Voice Quality8мин
VoIP over Wireless7мин
1 практическое упражнение
Module 3 Quiz12мин
Неделя
41 ч. на завершение
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 видео ((всего 43 мин.)), 2 материалов для самостоятельного изучения, 1 тест
13 видео
SipProfile2мин
SipManager3мин
A look back at Lesson 11мин
Introduction to Lesson 21мин
Code Walkthrough7мин
Deploy and Demo5мин
A look back at Lesson 21мин
Introduction to Lesson 31мин
VoIP and the Smart Home6мин
VoIP and the Smart Office3мин
Mobile VoIP and EoIP3мин
A look back at Lesson 31мин
2 материала для самостоятельного изучения
Code for the next Lesson.10мин
*Extra: The analog expansion header10мин
1 практическое упражнение
Module 4 Quiz8мин
4.4
Рецензии: 33Лучшие рецензии
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.
Преподаватели
Ganz Chockalingam
Principal EngineerQualcomm Institute of Calit2, UC, San Diego
Harinath Garudadri
Associate Research ScientistQualcomm Institute of Calit2, UC, San Diego
О Калифорнийский университет в Сан-Диего
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.
О специализации ''Интернет вещей'
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.
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