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Tsahi Levent-Levi is the CTO of the Technology Business Unit at RADVISION. His experience includes product management and development, project management, with a strong background in development and management of complex VoIP projects. Tsahi currently manages a wide range of VoIP and 3G client products, which enjoy significant market share in the industry.
In addition, Tsahi serves as co-chairman of the IMTC IMS Activity Group, which focuses on interoperability issues relating to IMS client applications. He also regularly participates in related 3GPP standardization conferences, where he works tirelessly to improve the standards for the industry as a whole.
When Tsahi isn’t editing his blog on how to make video-based telecom networks work, he enjoys playing with his two kids, developing new culinary innovations in his suburban Tel Aviv kitchen, or practicing Argentinean Tango with his lovely wife, a ballroom dancing instructor, while their daughter and son, look on.
Google is using Android and Chrome as their Trojan horses to give them a competitive edge that others will be hard pressed to achieve. Read more »
Wrap up our series about bandwidth estimation with a few questions and answers regarding NetSense - a delay-based bandwidth estimation mechanism. Read more »
NetSense is a bandwidth estimation algorithm that looks at delays instead of packet losses. This trait gives it a significant advantage over other techniques. Read more »
There’s an industry standard for bandwidth estimation. It might not be the best, but it is how solutions work today. In this post, Tsahi will explain the packet-based bandwidth estimation approach and its limitations. Read more »
The fact that our networks are getting faster and wider doesn’t necessarily means that video calling can ignore the simple question of how much bandwidth there is available. Read more »
What makes video calling applications complex to develop and why you should really consider licensing this technology in one piece from others. Read more »
RTP is used to send media. RTCP is used to control it. But does it has any real use or value? Do we really have a need for this additional protocol? Read more »
Wideband voice isn’t easy to deal with. Not because of technological barriers but mainly because of the wide range of possible codecs. Which ones should you be looking at for your next project? Read more »
H.265 is going to be ready as a draft in the beginning of 2012. What can we expect of it and what are its implications over VoIP hardware and software solution? Read more »
The IMTC IMS AG just finished a successful interoperability event for VoLTE. What did it achieve and where is it headed next with VoLTE? Read more »