About this course: 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.
Created by: University of California, San Diego
Taught by: Ganz Chockalingam, Principal Engineer
Qualcomm Institute of Calit2, UC, San Diego
Taught by: Harinath Garudadri, Associate Research Scientist
Qualcomm Institute of Calit2, UC, San Diego
| Basic Info | Course 4 of 6 in the Internet of Things Specialization |
| Commitment | 4 weeks of study, 1 hour/week |
| Language | English, Subtitles: Korean |
| How To Pass | Pass all graded assignments to complete the course. |
| User Ratings |
Syllabus
WEEK 1
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 video, 1 reading
- Video: Specialization Trailer
- Reading: Course 4 Slides
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 videos
- Video: Introduction to Lesson 1
- Video: Acronyms
- Video: Frequent Terminology
- Video: A look back at Lesson 1
- Video: Introduction to Lesson 2
- Video: Software Stack
- Video: Internet Protocol
- Video: Packet-switched Network
- Video: A look back at Lesson 2
- Video: Introduction to Lesson 3
- Video: PSTN: The Traditional Phone
- Video: Linphone Source Code
- Video: Codec Selection
- Video: A look back at Lesson3
Graded: Module 1 Quiz
WEEK 2
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 videos
- Video: Introduction to Lesson 1
- Video: What is VoIP?
- Video: Flavors of VoIP
- Video: VoIP: Common Applications and Fun Facts
- Video: A look back at Lesson 1
- Video: Introduction to Lesson 2
- Video: What is Linphone?
- Video: Linphone Features
- Video: Setup
- Video: Linphone Essentials
- Video: A look back at Lesson 2
- Video: Introduction to Lesson 3
- Video: SIP
- Video: Protocol Operations
- Video: Network Elements
- Video: SIP Messages
- Video: A look back at Lesson 3
Graded: Module 2 Quiz
WEEK 3
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 videos
- Video: Whats to expect in this Module!
- Video: Introduction to Lesson 1
- Video: Why compress data?
- Video: Why does it work?
- Video: What to look for?
- Video: Introduction to Lesson 2
- Video: Amplitude - Log Companding (PCM)
- Video: Time - Adaptive, Delta Quantization (ADPCM)
- Video: Frequency - ADPCM in multiple subbands (Subband ADPCM)
- Video: Introduction to Lesson 3
- Video: Speech production model
- Video: Linear Predictive Coding of Speech
- Video: 2G / 3G Codecs
- Video: Voice Quality
- Video: VoIP over Wireless
Graded: Module 3 Quiz
WEEK 4
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 videos, 2 readings
- Video: Introduction to Lesson 1
- Video: SipProfile
- Video: SipManager
- Video: A look back at Lesson 1
- Reading: Code for the next Lesson.
- Video: Introduction to Lesson 2
- Video: Code Walkthrough
- Video: Deploy and Demo
- Video: A look back at Lesson 2
- Video: Introduction to Lesson 3
- Video: VoIP and the Smart Home
- Video: VoIP and the Smart Office
- Video: Mobile VoIP and EoIP
- Video: A look back at Lesson 3
- Reading: *Extra: The analog expansion header
Graded: Module 4 Quiz
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Ratings and Reviews
Strategically Designed..
Very good. Could include more examples of making smart.
this course is very useful and i enjoyed for listen it
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Excellent. Very grateful to UC San Diego and Coursera