October 2015 Meeting

Philadelphia SMPTE & SBE Joint Meeting Notice

October 14th, 2015

Hampton Inn & Suites
Bensalem, PA

Karl Kuhn – Tektronix

Karl Kuhn 2013

Presentation 1: PTP – Precision Time Protocol

The industry is moving towards an all-IP infrastructure for baseband video and audio. Historically, coaxial cables carried analog and digital signals throughout a facility using point-to-point connections and matrix switching. But the cost-savings from using IP interfaces and switching are driving manufacturers and their customers towards new, data-centric architectures. In the near-term, both IP and legacy SDI islands will need to co-exist in hybrid facilities.
To address the interoperability challenges of packet-switched baseband and compressed networks the adaptation of Precision Time Protocol (ST 2059-2:2015) ensures that devices in the network will be synchronized with each other and with a master reference clock. Dynamic selection of the Grand Master time source across the network is an interesting and complex process to be discussed.

Presentation 2: ABR – Adaptive Bitrate Streaming

The Future of Content Distribution – ABR (Adaptive BitRate) monitoring is now needed to deliver high Quality of Experience (QoE) on distribution systems with dynamically changing available bandwidth. This is common on small screen delivery but moving to the large screen. It dramatically improves bandwidth utilization by only sending what the user is watching now and at the bitrate most suited for the instantaneously available bandwidth- usually in the home is the most variable bandwidth part of the entire network. Adaptive bitrate streaming is a technique used in streaming content over computer networks. While in the past most video streaming technologies utilized streaming protocols such as RTP with RTSP, today’s adaptive streaming technologies are almost exclusively based on HTTP and designed to work efficiently over large distributed HTTP networks such as the Internet. The content is really a moving video webpage with sound.
This presentation will drill into the EBP (Encoder Boundary Point) and IDR (Instantaneous Decoder Refresh) relationship. This is to make the stream fragmentation process more CPU efficient. An EBP is an indicator at the transport layer that an IDR is down inside the MPEG, so an EBP takes less CPU cycles to locate. Think of an EBP as a hint that an IDR will follow ‘almost’ immediately. The packager will fragment the input linear stream at these IDR frames for multi-bitrate transcoding.

Presenter: Karl Kuhn, Senior Video Systems Application Engineer, Tektronix

Karl supports Digital Audio and Video, Compression, IP, File Based, and RF test and measurement. He has been at Tektronix for 15 years. Prior to Tektronix he was the lead Video Test Engineer for IBM in their Digital Video Development Laboratory in Bethesda, MD. Karl holds 3 U.S. patents and one Japanese patent that cover In-service Testing of Digital Broadcast Video. Karl served on the NATAS Technical and Engineering Emmy Committee from 2006 to 2010. He is the Past Chair of DC SMPTE and now the SMPTE Eastern Region Governor and SMPTE North American Membership Director. Recently Karl was raised to SMPTE Fellow. He is also a Certified Project Management Professional thru PMI and the George Washington University.

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