AQA A’Level SLR12 Error checking and correction
About this video
AQA Specification Reference
AS Level 3.5.5.3
A Level 4.5.5.3
As even a simple data file when transmitted is broken down into a long stream of 1's and 0's it is vital that they arrive correctly and without corruption. In this video we discuss some methods which can be used to help, including: Parity bits, Majority voting, Checksums and Check digits.
Key questions:
- Why is error checking so important?
- How do the following error checking methods work?:
1. Parity bits
2. Majority voting
3. Checksums
4. Check digits
00:00 Error checking and correction
00:08 Intro
00:13 The need for error checking
01:41 Error checking methods
01:51 Parity checks (odd and even)
04:10 Majority voting
04:53 Checksums
06:05 Check digits
07:11 Calculating a check digit
08:48 Checking a check digit
09:20 Key questions
09:34 Outro
Last updated: 09.05.25
