ElecEng EXPLORER

Post 241104 - QR CODES and Earlier versions
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04 NOV 2024
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#SECTIONS#
QR CODES

- WIKIPEDIA LINKS
- YOUTUBE LINKS

CANNED POST CONCEPT
# VIEWS
0INTRODUCTION

For the ones who were not around in the creation days of the 'Morse', Bar & QR codes (1994), here are some links about them.

For the ones who were, this may remind you of the different coding & transmission systems we crunched / scribbled in the course - Hexadecimal, Checksum bits and Data Compression.

Yes, you're right, it's a 'canned post'. Just sharing for the Engg mindset viewers.

1QR CODE - Wikipedia Links

Barcode -
https://en.wikipedia.org/wiki/Barcode

Hamming Code -
https://en.wikipedia.org/wiki/Hamming_code

Morse Code -
https://en.wikipedia.org/wiki/Morse_code

QR Code -
https://en.wikipedia.org/wiki/QR_code

Shannon Coding -
https://en.wikipedia.org/wiki/Shannon_coding


2QR CODE - YouTube links

'Gary Explains' [1] and 'Veritasium' [2] have recently produced two clips. The timestamps can be an entry point if you're short of time. I am a subscriber but not financially affiliated with them.


[1] -- How do QR Codes Work? Features, Format, Error Correction, and More!
Gary Explains
12m54
https://youtu.be/Qb4wq2auXXk
10 Apr 2024


TIMESTAMPS:

01:26 - QR Code Definition
01:55 - Features

02:47 - Sizes
03:47 - Structure

07:55 - Error Correction
09:42 - Images and Logos

10:04 - Build Your Own QR Codes
10:45 - ZXing example

12:10 - Roundup



[2] -- How do QR codes work? (I built one myself to find out)
Veritasium
35m12
https://youtu.be/w5ebcowAJD8
1 Oct 2024


TIMESTAMPS:

00:00 - I was wrong
00:49 - How Morse Code revolutionized communication

03:57 - How barcodes work
03:55 - Bernard Silver

04:25 - Norman Joseph Woodland
06:15 - Algorithm

08:55 - David Allais
09:38 - Masahiro Hara in Denso Wave

10:34 - How QR codes store information
16:48 - ** Sponsor Advertisement **

18:16 - Why damaged QR codes still work
20:40 - Hamming Distance

25:15 - Reed Solomon Error Correcting Codes
26:54 - Masking Patterns

29:54 - Why are QR codes so common?
31:21 - How safe are QR codes?

32:25 - The future of QR codes

3CANNED POST CONCEPT

In the late 1980's, I related Richard Kingsmill's talk on 'triplej' radio to my short experience at work with other staff missing on critical days of projects.

Being interviewed, Richard, mentioned using a pre-recorded radio segment to fit into the broadcast when a programme host is late or missing - accident or family delay.

Richard Kingsmill -
https://en.wikipedia.org/wiki/Richard_Kingsmill

Triple J Radio (2JJJ) -
https://en.wikipedia.org/wiki/Triple_J

Double J Radio (2JJ) -
https://en.wikipedia.org/wiki/Double_J

$POSTED TO
// Posted to EEnT Alumni (LI), Elsoc-Alumni (FB) and own LI space
// Ctee: @Kaveh, @Luke, @Edmund, @Shakthi, @Vijay
// Prv Ctee: @GaganSK, @SomanshA, @SimonB, @MatthewR
// Heads: Dean @JulienE; EEnT Prof. @JinhongY

#ALUMNI VIEWS#
93Hidden
by FB
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EE&TELSOC-ALMOWNEE
GROUPLIFBLIEMAIL
16 DEC 2024

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