In coding theory, block codes are a large and important family of error-correcting codes that encode data in blocks.There is a vast number of examples for block codes, many of which have a wide range of practical applications. The abstract definition of block codes is conceptually useful because it allows coding theorists, mathematicians, and computer scientists to study the limitations of all block codes in a unified way.Such limitations often take the form of bounds that relate different parameters of the block code to each other, such as its rate and its ability to detect and correct errors. Examples of block codes are Reed–Solomon codes, Hamming codes, Hadamard codes, Expander codes, Golay codes, and Reed–Muller codes. These examples also belong to the class of linear codes, and hence they are called linear block codes. More particularly, these codes are known as algebraic block codes, or cyclic block codes, because they can be generated using boolean polynomials. Algebraic block codes are typically hard-decoded using algebraic decoders. The term block code may also refer to any error-correcting code that acts on a block of bits of input data to produce bits of output data . Consequently, the block coder is a memoryless device. Under this definition codes such as turbo codes, terminated convolutional codes and other iteratively decodable codes (turbo-like codes) would also be considered block codes. A non-terminated convolutional encoder would be an example of a non-block (unframed) code, which has memory and is instead classified as a tree code. This article deals with "algebraic block codes". (Wikipedia).
This video is a brief introduction to linear codes: dimensions, G (generating matrix), H (parity check matrix), their forms. Also gives an example of how to convert between G and H. Here is the formal definition of a Linear Code: A linear code of dimension k and length n over a field
From playlist Cryptography and Coding Theory
In this video, I calculate the determinant of a block matrix and show that the answer is what you expect, namely the product of the determinants of the blocks. This is useful for instance in the proof of the Cayley Hamilton theorem, but also in the theory of Jordan Forms. Cayley-Hamilton
From playlist Determinants
IMT4130 Introduction to Blockchain Technology
Introduction: Blockchain Technologies, Distributed Ledgers, Peer to Peer networking, public-private key crypto
From playlist Archive - Research in Mobile/Wearable Tech
An informal introduction to cryptography. Part of a larger series teaching programming at http://codeschool.org
From playlist Cryptography
Blockchain explained by analogy
A blockchain involves a shared data structure and protocols that are hard to mess with. Here I present a system that may give some intuition for main features of blockchain technology, as used for cryptocurrencies like Bitcoin or Ethereum. Summary: To this end, I use a simple method to tr
From playlist Crypto
Cryptography is a complex and confusing subject. In this talk you will learn about the core components of cryptography used in software development: securing data with encryption, ensuring data integrity with hashes and digital signatures, and protecting passwords with key derivation funct
From playlist Blockchain
Block Ciphers and Data Encryption Standard (DES) - Part 1
Fundamental concepts of Block Cipher Design Principles are discussed. DES is presented. Differential and linear cryptanalysis are explained . Block Cipher Principles Data Encryption Standard (DES) Differential and Linear Cryptanalysis Block Cipher Design Principles
From playlist Network Security
iOS Blocks Tutorial | Blocks in iOS | iOS Tutorial for Beginners | Edureka
***** iOS Developer Training: https://www.edureka.co/ios-development ***** Blocks are a language-level feature added to C, Objective-C and C++, which allow you to create distinct segments of code that can be passed around to methods or functions as if they were values. Blocks are Objecti
From playlist iOS Development
From playlist Programmieren mit Ruby mit Franz, Jan, Christiane
Compilation - Part Four: Intermediate Code
This is part four of a series of videos about compilation. Part four is about an intermediate representation of source programs that some compilers generate known as intermediate code. The video focuses on a form of intermediate code known as Three Address Code (TAC). You will see the g
From playlist Compilation
Blockly Developer Summit 2019: MakeCode Block Design
A Google TechTalk, 2019/10/11, presented by Jacqueline Russell & Shannon Kao ABSTRACT: The MakeCode team has created over 900 distinct blocks for a range of block coding applications. Jacqueline and Shannon talk through the seven design principles they use for MakeCode and how to apply the
From playlist Blockly Developers Summit 2019
2021 Blockly Developer Summit: Operator Precedence
A Google TechTalk, presented by Monica Kozbial, 2021/04/28-29 ABSTRACT: This talk was presented as part of the 2021 Blockly Summit. Ever been unsure about what operator precedence to use when writing generator code for custom blocks? In this talk, we'll talk about the role of operator pre
From playlist 2021 Blockly Developer Summit
RubyHACK 2018: Ruby Unblocked by Eliza De Jager
RubyHACK 2018: Ruby Unblocked by Eliza De Jager Ever noticed how flexible the use of blocks can make Ruby code? They allow us to reuse code easily, and to dynamically define not only method names but also method bodies, thereby essentially making metaprogramming possible. In this talk we
From playlist RubyHACK 2018
(IC 3.9) Source coding theorem (optimal lossless compression)
Proof of Shannon's "Source coding theorem", characterizing the entropy as the best possible lossless compression (using block codes) for a discrete memoryless source. A playlist of these videos is available at: http://www.youtube.com/playlist?list=PLE125425EC837021F
From playlist Information theory and Coding
Frog Hop - Invent with Scratch 2 0 Screencast
Many more games in the free Scratch Programming Playground book! https://inventwithscratch.com/book In this Scratch game, you hold down the mouse to charge up the frog's jump. Try to get the frog to jump from lily to lily and make it to the other side.
From playlist Scratch Programming
Double Jumps - Invent with Scratch 2.0 Screencast
Free online course in Scratch: https://www.udemy.com/scratch-game-programming/?couponCode=GET_SCRATCHING Many more games in the free Scratch Programming Playground book! https://inventwithscratch.com/book Run this game program in your browser at http://scratch.mit.edu/projects/11708677/
From playlist Scratch Programming
MountainWest RubyConf 2010 - EventMachine by Aman Gupta
Help us caption & translate this video! http://amara.org/v/GGvK/
From playlist Mountain West Ruby 2010
[한글 자막] 드론 제어 시스템 설계 프로세스에 대해 배울 수 있습니다. 쿼드콥터 모델을 빌드, 시뮬레이션하고 테스트를 수행합니다. 드론 프로그래밍 1편 – 제어 시스템 설계: https://youtu.be/h4GRJ38TU6U 드론 프로그래밍 2편 - 쿼드콥터 호버링 제어 시스템: https://youtu.be/GK1t8YIvGM8 칼만 필터 (Kalman Filter) 영상 시리즈: https://bit.ly/2uhdUTY PARROT 미니드론 지원 패키지 다운로드: https://bit.ly/2Fs6L
From playlist 드론 프로그래밍
Block Ciphers and Data Encryption Standard (DES): Part 2
Fundamental concepts of Block Cipher Design Principles are discussed. Differential cryptanalysis and linear cryptanalysis are explained.
From playlist Network Security
Ruby Conf 12 - Dissecting a Ruby Block by Pat Saughnessy
More than any other feature of the language, in my opinion blocks are what make using Ruby fun. But what is a block, exactly? What would I see if I could cut one open and look inside? During this talk we'll: Explore Ruby's internal implementation of blocks, lambdas, procs and bindings. Le
From playlist Ruby Conference 2012