Bandwidth extension of signal is defined as the deliberate process of expanding the frequency range (bandwidth) of a signal in which it contains an appreciable and useful content, and/or the frequency range in which its effects are such. Its significant advancement in recent years has led to the technology being adopted commercially in several areas including psychacoustic bass enhancement of small loudspeakers and the high frequency enhancement of coded speech and audio. Bandwidth extension has been used in both speech and audio compression applications. The algorithms used in G.729.1 and Spectral Band Replication (SBR) are two of many examples of bandwidth extension algorithms currently in use. In these methods, the low band of the spectrum is encoded using an existing codec, whereas the high band is coarsely parameterized using fewer parameters. Many of these bandwidth extension algorithms make use of the correlation between the low band and the high band in order to predict the wider band signal from extracted lower-band features. Others encode the high band using very few bits. This is often sufficient since the ear is less sensitive to distortions in the high band compared to the low band. (Wikipedia).
An intro to the core protocols of the Internet, including IPv4, TCP, UDP, and HTTP. Part of a larger series teaching programming. See codeschool.org
From playlist The Internet
What is a continuous extension?
Continuous Extension In this video, I define the concept of a continuous extension of a function and show that a function has a continuous extension if and only if it is uniformly continuous. This explains yet again why uniform continuity is so awesome Uniform Continuity: https://youtu.b
From playlist Limits and Continuity
How to get more views on YouTube
In this video I share a secret on how I have been increasing the number of views in my channel in the last two years. Hopefully you will find a couple of things in here that will help you, if you are looking to expand your channel.
From playlist Technology
Apache ReWrite so we can omit the html extensions
More videos like this online at http://www.theurbanpenguin.com We will never undertsand users, this is a given so don't even try. her is a little trick though so when they can't remember to add the .html bit at the end you can ask Apache to do it for you using mod_rewite
From playlist Learning Apache HTTP Server
Limit of (4u^4 + 5)/((u^2 - 2)(2u^2 - 1)) as u approaches infinity
Limit of (4u^4 + 5)/((u^2 - 2)(2u^2 - 1)) as u approaches infinity. This is a calculus problem where we find a limit as u approaches infinity. In this case we have a rational function and the numerator and denominator have the same growth rate, so the limit is the ratio of the leading coef
From playlist Limits at Infinity
What is length contraction? Length contraction gives the second piece (along with time dilation) of the puzzle that allows us to reconcile the fact that the speed of light is constant in all reference frames.
From playlist Relativity
Why I got a Google One membership
As I was close to exceeding my storage limit for Gmail, I decided to get a Google One membership. I have ways to get around it, but I chose not to. You might decide to do the same.
From playlist Technology
DEFCON 15: Securing the Tor Network
Mike Perry Mad Computer Scientist, fscked.org evil labs Imagine your only connection to the Internet was through a potentially hostile environment such as the Defcon wireless network. Worse, imagine all someone had to do to own you was to inject some html that runs a plugin or some clever
From playlist DEFCON 15
WebAssembly: The What, Why and How
WebAssembly is a portable, size, and load-time efficient binary format for the web. It is an emerging standard being developed in the WebAssembly community group, and supported by multiple browser vendors. This talk details what WebAssembly is, the problems it is trying to solve, exciting
From playlist Talks
The visual evolution of the Internet
The Internet has changed a lot over the past few decades. Here's a look at some of the ways the Web has evolved—from the first Web site to dial-up connections to modern day social networking sites.
From playlist The Internet
High Technology High School (Team #14694) Presentation
High Technology High School from Lincroft, New Jersey was Runner Up in MathWorks Math Modeling Challenge 2021! On April 26, 2021, finalist teams presented their solution papers via Zoom to a panel of judges. Learn more about the 2021 Challenge problem topic and the winners: https://m3chall
From playlist M3 Challenge
Meet the Packets: How audio travels into your browser - Sara Fecadu - JSConf US 2019
It's 2019, audio packets from streaming services are swirling all around us. Yet, as JavaScript enthusiasts, we are often so focused on the application layer that we miss out on all the quirks that exist in the layers below. Let's journey from the browser down to the physical layer (and b
From playlist JSConf US 2019
Julia R Masterman Middle High School (Team #14665) Presentation
Julia R Masterman Middle High School from Philadelphia, Pennsylvania was a Finalist in MathWorks Math Modeling Challenge 2021! On April 26, 2021, finalist teams presented their solution papers via Zoom to a panel of judges. Learn more about the 2021 Challenge problem topic and the winners:
From playlist M3 Challenge
Stanford Seminar - Rebooting the Internet
Joe Touch Independent Consultant David Farber Keio University March 11, 2020 "Build one and throw it out," so the adage goes. This talk explores the argument for systems architecture revision, including processors, operating systems, and networking--both as a general principle and the w
From playlist Stanford EE380-Colloquium on Computer Systems - Seminar Series
Velocity 2010: "Lightning Demos"
"Lightning Demos", Simon Perkins (Simtec Limited), Eric Goldsmith (AOL), Jaime Yap (Google), Eric Lawrence (Microsoft)
From playlist Velocity 2010
Google Tech Talk December 8, 2011 Presented by Roberto Peon and William Chan. ABSTRACT SPDY is an application layer protocol which increases security while decreasing latency. SPDY is on track for a possible re-naming to HTTP/2.0, and is being actively implemented by important co
From playlist Make the Web Faster
Tunable gaps and bandwidths in twisted double bilayer graphene system by Mandar Deshmukh
DISCUSSION MEETING NOVEL PHASES OF QUANTUM MATTER ORGANIZERS: Adhip Agarwala, Sumilan Banerjee, Subhro Bhattacharjee, Abhishodh Prakash and Smitha Vishveshwara DATE: 23 December 2019 to 02 January 2020 VENUE: Ramanujan Lecture Hall, ICTS Bangalore Recent theoretical and experimental
From playlist Novel Phases of Quantum Matter 2019
Academic Keynote: Systems Support for Federated Computation, Mosharaf Chowdhury (U of Michigan)
A Google TechTalk, presented by Mosharaf Chowdhury, 2021/11/9 ABSTRACT: Systems Support for Federated Computation Although theoretical federated learning research is growing exponentially, we are far from putting those theories into practice. In this talk, I will share our ventures into
From playlist 2021 Google Workshop on Federated Learning and Analytics
What is the definition of a function
👉 Learn about every thing you need to know to understand the domain and range of functions. We will look at functions represented as equations, tables, mapping, and ordered pairs. The domain is the set of all possible x or input values where the range is the set of all possible y or outp
From playlist What is the Domain and Range of the Function
Black Hat USA 2010: PSUDP: A Passive Approach to Network-Wide Covert Communication 1/4
Speaker: Kenton Born This presentation analyzes a novel approach to covert communication over DNS by introducing PSUDP, a program demonstrating passive network-wide covert communication. While several high-bandwidth DNS tunnel implementations are freely available, they all use similar str
From playlist BH USA 2010 - NETWORK