Search for Free 150,000+ Essays

Find more results for this search now!
CLICK the BUTTON to the RIGHT!

Need a Brand New Custom Essay Now?  click here

About Parity Codes, History

Parity/Non-parity Parity check Early transmission codes had a serious problem in that a bit could be lost or gained in transmission because of an electrical or mechanical failure/ If the loss went undetected, the character received on the other end of the lime was incorrect.

To Prevent this from happening, a parity check system was developed. Each character is represented by a byte consisting of a combination of intelligence bits (seven bits in ASCII and eight bits in EBCDIC) and an additional bit called a check or parity bit.

Even parity codes place a check bit with each byte that contains an uneven number of 1 bits. (Remember that a bit is either 1 or o). Because the check bit is transmitted only with characters composed of an uneven number of 1 bits,all characters transmitted will have n even number of 1 bits. The check bit is transmitted to and from the computer along with character code. If a bit is lost (or added) in transmission, the system will detect its loss. An uneven number of 1 bits received in a code string composed of even bits will signal an error.

Odd Parity codes add a check bit to code combinations that have an even number of 1 bits. Thus,all characters transmitted have an odd number of bits. Odd and even parity care similar in nature. They are both designed to signal an error in the even that data are lost or added.

[i:c25f4eb3d4]This was a short essay for my technology class. Please post comments and feedback. Thanks![/i:c25f4eb3d4]

Sign In Now to Read Entire Essay

Not a Member?   Create Your FREE Account »

Comments / Reviews

read full essay >>

Already a Member?   Login Now >

This essay and THOUSANDS of
other essays are FREE at eCheat.

Uploaded by:  

Date:  

Category:   Technology

Length:   1 pages (256 words)

Views:   7686

Report this Essay Save Essay
Professionally written essays on this topic:

About Parity Codes, History

View more professionally written essays on this topic »