Re: [AVT] draft-kerr-avt-vorbis-rtp-04

Hi Linus,

Linus Walleij wrote:

> On Mon, 17 Jan 2005, Phil Kerr wrote:
>
>> Thanks for clarifying this point.  To avoid the problems you've 
>> mentioned should I include polynomial function and a C code snippet?
>
>
> Ideally, that's how it should be done. I don't know if there is an RFC 
> for CRC32 that you could simply reference (after checking that it 
> conforms to your implementation of course).
>
> Another approach, which I used in the past, is to use SHA-1 hashing 
> instead (160 bits), and reference RFC 3174, which already carries an 
> example implementation. If you need a free-to-use BSD-like license 
> implementation of SHA-1, you can find one in my SHFtool test 
> implementation (http://www.df.lth.se/~triad/krad/shftool/) which you 
> are more than welcome to use if you like.

Thanks for this info.  Because the CRC hash is in each packet, using 
SHA-1 would add 128 extra bits which does add a significant overhead.

Regards

Phil

>
> Hope this helps...
>
> Yours,
> Linus Walleij
>
> _______________________________________________
> Audio/Video Transport Working Group
> avt@ietf.org
> https://www1.ietf.org/mailman/listinfo/avt
>

_______________________________________________
Audio/Video Transport Working Group
avt@ietf.org
https://www1.ietf.org/mailman/listinfo/avt