Gordon And Mike's ICT Podcast

Video Delivery and MPEG (Moving Pictures Experts Group) [26:30]

loading...

June 15, 2008 2:06pm

26m

Intro: The Moving Picture Experts Group or MPEG, is a working group of ISO/IEC charged with the development of video and audio encoding standards. In this podcast we look at the MPEG standards and video delivery systems.

Mike: Gordon, what sources are we referring to here?

Wikipedia and white paper from the MPEG Industry Forum at www.m4if.org/public/documents/vault/m4-out-20027.pdf. we've also got a couple of diagrams from the Verizon website.

Mike: What's the history of MPEG?

Mike: Are these open standards?

Mike: What's the history? Can you tell us about MPEG-1?

Mike: How about MPEG-2?

Mike: We don't hear much about MPEG-3 - what's up with that?

Mike: Let's talk about MPEG-4 now.

Mike: What are some of the advantages of MPEG-4?

Mike: Let's switch gears and talk about carried video delivery systems - specifically the telcos and cable companies. How is this technology used?

It's different for broadcast and video on demand (VOD) content. Let's discuss broadcast systems and look at how Verizon (as an example) is setup.



Two National Super Head Ends (SHE) - one in Tampa and the other in Bloomington, IL:

- Diversely located
- Satellites collect video feeds
- Video is converted to digital MPEG-2 and packaged in a 10-GigE payload
-  SHE servers “pitch” data to the Video Hub Office (VHO)
- Three OC-192 SONET (long haul) rings that drop and continue GigE to VHOs

Mike: What is OC-192?

Mike: OK, these video hub offices are distributed over Verizon's footprint - what happens when they get the video?

Video Hub Office (VHO) ex. Burlington MA Combines:
- National Channels
- VOD Servers “catch” data from the SHE servers
- Off-Air, program guide, public, education, and government (PEG) channels, and local ads are injected
- Encrypts all content
- Content sent over several 1-GigE links to local Video Serving Offices (VSO, ex. CO) over SONET (medium haul)
- VSO then sends it to the OLT and then to the  PON network for delivery to customer.

Mike: Broadcast is still done using traditional RF modulation methods - correct?

Yes - that will change - rumor has it Verizon will be trialing IP Broadcasting this summer in Pennsylvania - just a rumor!