Hamming Code

Definition - What does Hamming Code mean?

A hamming code is a linear code for error detection that can detect up to two simultaneous bit errors and is capable of correcting single-bit errors. Reliable communication is assured if the hamming distance between the transmitter and receiver is less than or equal to one.

Techopedia explains Hamming Code

Hamming code was invented by Richard Hamming in 1950. The method is useful for a single bit change, which is more probable than two or more bit changes.

The simplicity of hamming codes makes them suitable for use in computer memory and single-error correction. They use a double-error detection variant called SECDED. These codes have a minimum hamming distance of three, where the code detects and corrects single errors while double bit errors are detected only if a correction is not attempted. Adding an extra parity bit increases the minimum distance of the hamming code to four, which allows the code to detect and correct single errors while detecting double errors.

Hamming initially introduced code that enclosed four data bits into seven bits by adding three parity bits. It can easily be extended to eight and four bit code by adding an extra parity bit on top of the encoded word.

Share this:

Connect with us

Email Newsletter

Join thousands of others with our weekly newsletter

The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.