Recovering data from CRC bits

[dcreddy1980]

Is there any way to recover the data from CRC bits, if CRC polynomial and data length are known.

Regards,
dcreddy

 

[echo47]

CRCs and Error Correcting Codes are closely related, but a CRC only tells you if an error occurred, not where.

Introductory info:
https://en.wikipedia.org/wiki/Cyclic_redundancy_check

 

[cbr_929rr]

CRC is not used for recovering data. It is only used to check if there are errors in the received data.
For more info, check out **broken link removed**
Cbr

 

[cdcll]

Is there any way to recover the data from CRC bits, if CRC polynomial and data length are known.

Regards,
dcreddy

If you mean to deframe using CRC, it sounds interesting!

 

[jjww110]

crc only can check errors, you can use fec code such as bch or rs to recove errors!!

 

[cherrytart]

It's a bit like adding two numbers, you can't determine the two numbers from the sum alone.
You can't even determine where the CRC went wrong, though you can reverse the algorithm, since the only states of the CRC you know are the beginning value and the last value.
The codes that allow you to correct errors are called Error Correcting Codes.

 

[tkbits]

CRC is a lot like the old check method of "casting out nines" (this latter method produces a single check digit).

You can detect an inconsistency, but the result won't tell you where it is.

 

[Hero]

CRC code is only error detection code not and error correction code. So you can't recover any data with CRC code. For data recovering you need some error correcting code with more redundancy than CRC code.

 

[PaulHolland]

Hi, You can use CRC's for error recovery there are some papers you can find on internet about how you can do this.

regards,

Paul.

I check for you and have a look at this:
http://www.ddj.com/dept/cpp/184401662