Wireshark · Wireshark-users: Re: [Wireshark-users] skew, delta and jitter in wireshark VOIP->analyse

[nangergong <nangergong@xxxxxxxxx>]

thanks

BTW, when I use iLBC codec for audio VOIP calls, I noticed that the skew, delta and jitter shown in wireshark VOIP-Analysis GUI are all 0, what is the reason for this? Does this mean that wireshark can't analyze iLBC codec?

On Wed, Feb 9, 2011 at 2:04 PM, Anders Broman <anders.broman@xxxxxxxxxxxx> wrote:

-----Original Message-----
From: wireshark-users-bounces@xxxxxxxxxxxxx [mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Giles Coochey
Sent: den 9 februari 2011 14:48
To: wireshark-users@xxxxxxxxxxxxx
Subject: Re: [Wireshark-users] skew, delta and jitter in wireshark VOIP->analyse

On 09/02/2011 14:37, nangergong wrote:
>> Hi, all,
>>
>>   What is the difference between skew, delta and jitter in a voip stream?
>>
>>   I only know the impact of jitters on voip streams, what are the
>> impacts of skew and delta on VOIP streaming quality?
>>
>>   Thank you!
>Not sure if my understanding is correct... skew is absolute jitter based on comparison on the first packet(s).
>delta is what I understand to be latency, or delay.
>
>--
>Best Regards,
>
>Giles Coochey

See http://books.google.com/books?id=OM7YJAy9_m8C&pg=PA175&lpg=PA175&dq=RTP+skew&source=bl&ots=hUOESKrWB4&sig=F2cjXTyonrfi5R7pgKjuHRli4SA&hl=sv&ei=np1STe-PFIfLswbL7bjyBg&sa=X&oi=book_result&ct=result&resnum=10&ved=0CEQQ6AEwCQ#v=onepage&q=RTP%20skew&f=false




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