Is it true that lower 16 bits of CRC32 is CRC16?

Question

I just found that this page is saying...

I believe that CRC16 can be obtained from CRC32 by dropping the upper 16 bits.

Is it true?

Then is the lower 8 bits is for CRC8?

"CRC-16" isn't even well-defined; it identifies a whole family of related functions. — chrylis -cautiouslyoptimistic-, Dec 08 '15 at 07:58
In a few words, no and no. The bug report you cited is from 1997, and the so-called review by someone who didn't know what he was talking about is from 2004. — user207421, Dec 08 '15 at 08:57

score 2 · Accepted Answer · answered Dec 09 '15 at 05:05

2

No. The low bits of a CRC is not also a CRC. You can get another, shorter check value that way in a pinch, but it's not a CRC.

answered Dec 09 '15 at 05:05

Mark Adler

1 Answers1