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