Frequent Terminology

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Из курса от партнера University of California San Diego

Internet of Things: Communication Technologies

131 оценки

University of California San Diego

Internet of Things: Communication Technologies

131 оценки

Курс 4 из 6 — Specialization Internet of Things

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.

Из урока

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.

Introduction to Lesson 10:37

Frequent Terminology2:38

A look back at Lesson 10:46

Познакомьтесь с преподавателями

Ganz Chockalingam
Principal Engineer
Qualcomm Institute of Calit2, UC, San Diego
Harinath Garudadri
Associate Research Scientist
Qualcomm Institute of Calit2, UC, San Diego

All right, Randy, tell us what's behind door number two.

[LAUGH] >> So door number two actually contains

frequent terminology that we'll cover in this course.

>> Excellent, excellent.

>> So let's go ahead and get started. >> Take a look at it, all right.

>> So, yeah, you heard these terms earlier, Protocol, Datagrams,

Packets, Internet Protocol Suite.

So protocol is a set of rules for how the systems communicate, datagrams, same

thing, are packets where it's just data to be sent between devices on a network.

And Internet Protocol Suite is just another name for the Internet Protocol,

pretty cool, but so the big deals are the codecs and containers.

So Codec was just a way to say a coder-decoder so

that means it'll encode say, some kind of audio or

voice signal and then later on, the same codec will be used to decode it.

This allows for easy or better transmission because

sending a big file is gonna be too hard and then you also need to use the same

codec to decode it because you'd be using the same algorithm for the coding.

>> How nifty that they called it codec.

>> Yeah. >> Coder, decoder.

[LAUGH] >> I would've never thought of that.

Often times though codecs get confused for something called containers and

containers are just file formats that contain the codecs,

right, so containers could be like a dot wav file, dot mp3, etc.

And finally we will be talking about something called the GStreamer and

that's just for the, I believe, the Bluetooth system.

>> So yeah, we're not gonna go too much into GStreamer, however,

you do just kind of need to understand it's kind of a bunch of codecs that come.

>> Yeah, like an all-in-one.

>> It's like an all-in-one and it comes in your newest release of Ubuntu.

So since we're gonna be mainly working with Android on this particular,

this particular course, you are welcome and in the next module actually,

we're gonna talk about Linphone, and you can get it on Ubuntu, and Android for

your dragon board 410C.

But, you know, these are the codecs that you're probably gonna be using,

is these GStreamer, this GStreamer set and yeah.

So we might mention a little bit about it, it might come up, it's good to know there,

I'd recommend searching for it and kinda learning a little bit more about it, but

yeah, it's gonna mainly be used for Ubuntu.

Yeah.

>> Huh. >> So yeah, so

we'll see you in the next videos.

What, next lesson already, right?

>> Yeah, next lesson already.

[CROSSTALK] >> With this, hopefully you have a nice

cheat sheet to look at to reference later on, so see you next time.

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