eror detection and correction.pptx - ERROR DETECTION AND CORRECTION Pablo Barrac Asi ECE MEng Data Communications Code \u2022 Data communications codes are

eror detection and correction.pptx - ERROR DETECTION AND...

This preview shows page 1 - 11 out of 24 pages.

ERROR DETECTION AND CORRECTION Pablo Barrac Asi, ECE, MEng
Image of page 1
Data Communications Code Data communications codes are often used to represent character and symbols, such as letters, digits and punctuation marks. Therefore, data communications codes are called character codes, character sets, symbol codes, or character languages.
Image of page 2
Binary Information Codes MORSE CODE The first datacom code with three unequal length symbols. Table of Morse Code
Image of page 3
Binary Information Codes BAUDOT CODE The first fixed-length character code. It is a 5 bit character code, with a start bit and a 1.5 stop bits. Jean-Maurice-Emile Baudot
Image of page 4
Binary Information Codes AMERICAN STANDARD CODE FOR INFORMATION INTERCHANGE (ASCII) it uses 7 bits of information, an 8 th bit for use as parity, a start bit and two stop bits
Image of page 5
Image of page 6
Image of page 7
Binary Information Codes EXTENDED BINARY CODE DECIMAL INTERCHANGE CODE (EBCDIC) the true 8 level code
Image of page 8
Error Detection and Correction Techniques ERROR DETECTION The process of monitoring the received data and determining when a transmission error has occurred.
Image of page 9
Error Detection 1. REDUNDANCY - involves transmitting each character twice. If the same character is not received 2x in succession, an error has occurred - retransmission of the entire message is very inefficient, because second transmission of a message is 100% redundant
Image of page 10
Image of page 11

You've reached the end of your free preview.

Want to read all 24 pages?

  • Fall '19
  • ASCII, Error detection and correction, Parity bit

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes