Bit Interleaved Parity(BIP) is a checksummethod based on the interleaved parity check, which is used at the physical layer to monitorerrorfrequency. In bit interleaved parity, entire bit streams from many data blocks arechecked for bit errors. In the BIP method, a parity byte is formed from the bits of successive data blocks, and always from the bits with the same bit position. The sequence of bit positions results in an even or odd parity, which is entered in the parity byte at the corresponding position. If the parity byte changes, then this has caused an error.