[SIPForum-discussion] what is the rate atwhichdataistransmitted inVOIP

[Bryan McCaffrey]

This is a function of sampling rate with the given codec. Have a look at
codecs on protocols.com for further reading. Sampling rates will affect
delay so watch for that in traffic engineering.




On 1/25/07, sukerry at 126.com <sukerry at 126.com> wrote:
>
> Hemant Mehar{WP130,199}
>
> There is no restrictions in RTP packet length. for example , the frame
> length of gsm codec is 33, we can fill a rtp packet with 4 gsm frames
> (4*33=132 bytes).
>
> {WP240,130}ð
>
>
>
>
> hi,
> How will u put  multiple audio frames in a RTP packet.. because whatever
> codec we r using that is fixed. is multiple bitrate codec available???
>
>
>
> Thanks & Regards
> Hemant K. Mehar
>
>
>
>
> "sukerry" <sukerry at 126.com>
> Sent by: discussion-bounces at sipforum.org
> 01/24/2007 07:26 PM
> To"imran at smart-it-engineering.com" <imran at smart-it-engineering.com>,
> "harish T" <harish0611 at gmail.com>, "discussion at sipforum.org" <
> discussion at sipforum.org>
> cc
> SubjectRe: [SIPForum-discussion] what is the rate at which
> dataistransmitted in VOIP
>
>
>
>
>
>
>
> Imran M Yousuf{WP130,199}
>
> I think we can make ip bitrate slow substantially by put multiple audio
> frames in a RTP packet.
>
> Dear Harish,
>
> As far as my knowledge goes in VoIP the BITRATE depends on the Codec being
> used. And there are 2 terms commonly used "codec bitrate" and "IP bitrate".
> In traditional telephone line the code used is PCM, which has codec bitrate
> 64kbps but its IP bitrate or bandwidth is much more, 80kbps. Coded birate is
> bitrate without the IP header.
> The 2 most widely used codec in VoIP is G.729 which has a Codec B/W 8kbps
> but its IP B/W is 24kbps (10s payload) and the other is G.723.1, which
> again has 2 variations of codec bit rate 5.6kbps and 6.4kbps and their
> respective IP B/Ws' are 16.27kbps and 17.07kbps.
> Please see the following articles to gather more information about them.
>
> http://www.erlang.com/bandwidth.html
> http://www.cliconnect.com/Articles/VoIPBandwidthRequirements.html
>
> Thank you,
>
> Imran M Yousuf
> Enterpreneur & Lead Developer
> Smart IT Engineering
> Dhaka, Bangladesh
> Email: imran at smart-it-engineering.com
> Mobile: +880-1711402557
>
> = = = = = = = = = = = = = = = = = = = = = =
>
> {WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}sukerry
>
> {WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}ðsukerry@
> 126.com
>
> {WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}2007-01-24
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> {WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}ðsukerry
>
> {WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}ðsukerry@
> 126.com
>
> {WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}{WP240,130}{WP130,240}2007-01-25
>
>
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