Testing a video telephony system has a lot of aspects. One of the most important ones is the resulting video quality of the system. Problem is, there’s no easy way of doing that. Two approaches exist today for video quality testing: Testing against a known video reference Testing the video without any reference 1. Testing against a known video reference If we receive a video stream that is known in advance, we can
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By Tsahi Levent-Levi | March 17th, 2008 | Filed under Technology
Developing a videophone or any other telecommunication client? You should start thinking seriously about IMS. Today, there are two main standards used for multimedia communications over IP: SIP and H.323, where SIP is the standard which is being adopted by most vendors today - especially in the consumer market. As 3GPP, 3GPP2, TISPAN, Packet Cable and WiMAX have all selected IMS for their next generation networks, it goes without saying that a lot of vendors will start working on IMS
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By Tsahi Levent-Levi | March 6th, 2008 | Filed under Clients
We have just announced that Quanta is using our IMS Video Share Application.What is so interesting about this press release? Video Sharing Quanta Windows Mobile Video Sharing [You can learn more about Video Sharing here. Basically - it’s a point-to-point service for mobile handsets.] The adoption of Video Sharing by operators is expanding. Video Sharing is an interesting service for 3G mobile handsets - my own feeling is
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By Tsahi Levent-Levi | March 4th, 2008 | Filed under Clients
Megaco is back for another round, like the phoenix, it re-emerges after burning to ashes. Why now? IMS, of course…Megaco, also known as H.248, is a standard used to decompose multimedia gateways. If you’re developing a large scalable gateway, with a lot of multimedia processing, then splitting the logic of the application from the “dirty” processing of the media itself is a wise thing to do. In such a case, the communication protocol between the logic and the media can be Megaco - and this is exactly what is done in IMS when developing MRFs (Media Resource Function). Now, prior to IMS, I’ve seen Megaco demand from customers fluctuating - every year or two, the demand lowers, only to rise again a year later. Now, Megaco, as the Phoenix it is, is rising again from its ashes for IMS - and it’s doing it gloriously. There are a lot of companies out there developing products for the IMS infrastructure - those developing gateways or other media servers are in need for Megaco. If you are looking for Megaco stack, then search no more.
By Tsahi Levent-Levi | February 14th, 2008 | Filed under Technology
The developers I work with are back from an interoperability event held by the IMTC. They tested there 3G-324M and IMS Video Share technologies to make sure our products are interoperable. What are the insights from these events? 3G-324M Today, 3G-324M is a stable technology available in almost every 3G handset in Europe and Asia. It is stable, interoperable and working - between different handset vendors, against multiple servers, and through roaming services around the world. There are, however, two
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By Tsahi Levent-Levi | January 31st, 2008 | Filed under Interoperability
This year I am going to attend TVoDSL in Paris. I am going to take part at their conference program on merging video conferencing technology with IPTV. Simply put - VoIP+IPTV. For me, this step is as logical as merging VoIP or IMS with social media. Video as a mediator between people is still at its birth. The technology is here to some extent - we have 3G phones capable of handling videotelephony, we can use Skype or other internet
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By Tsahi Levent-Levi | January 30th, 2008 | Filed under IPTV
It’s the beginning of 2008 and of course, people love to make predictions for the year ahead (if anything to guarantee a good laughter after all). Yours truly is not an exception - this post was thought to appear under the name of Crystal Ball 2008, and it was supposed to make a number of bold (how else) predictions regarding the future of the communication technologies for upcoming year. Thinking about it, isn’t it great to know what the future
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By Anatoli Levine | January 29th, 2008 | Filed under Technology
This is the second part of Interoperability in SIP and its relation to Art. You can read the first part here. SIP Interoperability workshop There were about 20 short but essential presentations at the 90 minutes workshop by the people representing different companies and organizations (yours truly represented IMTC and RADVISION). Overall message was rather unified. It is not all doom and gloom - there is basic interoperability in SIP. But all interoperability is extremely clustered - implementations usually work
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By Anatoli Levine | January 22nd, 2008 | Filed under Interoperability
SIP today is a standard-de-facto, “The Protocol” which runs our multimedia communication. I believe nobody would argue with this statement. All the vendors have their SIP based equipment in the field, so considering the level of maturity of the protocol (about 10+ years old) and more than 20 SipIt events -(SIPit IOT events) as well as numerous IOT events by other consortia and standard bodies, we can expect that majority of devices on the market are highly interoperable.
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By Anatoli Levine | January 15th, 2008 | Filed under Interoperability
We all had that joyful moment of downloading another application from the web. Some of us (well, probably a lot of us) are using Skype - a downloadable client for desktops. But what about mobile handsets? Can we have a downloadable client that truly works on a handset? In the past year, I’ve answered RFIs and RFQs of operators and handset vendors who were seeking to develop a VoIP client. The customers asked for a client that should support
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By Tsahi Levent-Levi | January 3rd, 2008 | Filed under Clients
