Combining Parity & CRC for Error Checking

[ws0619]

Hi!

Recently I am studying on parity and CRC(cyclic redundancy checks) this two error checking methods.

The problem is can this both methods combine to use together during transmission data?

Let say I need to transfer ASCII code and I do CRC first,then before sending data I do parity on the data formed after CRC to make it 8 bits.

Is this method correct or not?Can someone guide me how to build a error checking by using this two methods together?

Thanks!

 

[mgb_phys]

Yes it's common to combine them.
Once you have calculated the checksum (CRC) it goes on the end of the data like any data - the parity bit is then applied to each byte in the data stream

 

[oswaler]

Hello,

It is possible to combine parity and CRC for error checking, but it is important to understand the limitations and considerations of each method before doing so.

Parity checks are a simple and efficient method for detecting errors in data transmission. However, it can only detect an odd number of errors and is not able to correct them. In contrast, CRC is a more complex and robust error checking method that can detect and correct a larger number of errors.

In theory, combining both methods can provide a more thorough error checking process. However, it is important to consider the added complexity and potential for errors in the implementation. Additionally, it is important to ensure that the CRC and parity bits are properly aligned and calculated to avoid any issues.

Overall, it is possible to combine parity and CRC for error checking, but it is important to carefully consider the trade-offs and ensure proper implementation for the best results.