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#crc#cyclicredundancycheck#errordetection
How do CRCs work?
Ben Eater
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- Recommended by 2 people: 1 on Lobsters and 1 in engineering communities.
- Presented by Ben Eater
Intermediate. Assumes working knowledge.
695K views7 years ago2 recommendations
Computer scienceHardwareAlgorithmsNetworking and protocolsMath for programmers
Ben Eater explains the mathematics behind cyclic redundancy checks (CRCs) and how they use polynomial division for error detection.
CRC (cyclic redundancy check) is one of the most common methods of error detection. It uses some interesting mathematical tricks to guarantee that it can catch certain kinds of errors. How does it work? Support these videos on Patreon: patreon.com/beneater or eater.net/support for other ways to support. - Detecting errors with modulo division - Message data as a polynomial - Finite fields - Polynomial division - Sending and verifying CRC - Choosing a generator polynomial ------------------ Social media: Website: eater.net Twitter: x.com/beneater Patreon: patreon.com/beneater Reddit: reddit.com/r/beneater Special thanks to these supporters for making this video possible: Ben Dyson Ben Kamens Ben Williams Brandon Stranzl Christopher Blackmon Debilu Krastas Eric Dynowski Gonzalo Belascuen Greg Stratton Jay Binks Jayne Gabriele Johnathan Roatch Jordan Scales Manne Moquist Michael Nicholas Moresco Nick Wrightsman Randy True Ric Allinson Sachin Chitale SonOfSofamanWhy it's here
2 people recommend thisWhat people say. Recommended as a clear explanation of how CRCs work and how to implement hardware error detection.
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Hardware build: CRC calculation
> CRC (cyclic redundancy check) involves some intimidating math. But it turns out that it can all be done with some fairly simple hardware. In this video, I build the hardware to compute and verify CRCs. Previous video on CRC theory is here: link to this video