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DASH Third Version to Reduce Live Streaming Latency: Video

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Troy Dreier: Hi everyone. This is Troy Dreier coming to you from Streaming Media East 2016 in New York City. I'm having short conversations with thought leaders in our industry. Right now I'm joined by Alex Giladi.

Alex Giladi: Yeah.

Troy Dreier: Principal architect at Comcast. Besides your fascinating work at that giant, you're also involved in multiple working groups about the development of DASH, the future of DASH. That's what you're going to be talking about here tomorrow. I'd love to hear from your perspective what are the challenges DASH is facing and where is it going? What new features can we expect in the implementation?

Alex Giladi: Thank you for having me here. I think that what is happening right now and what has been happening for the last couple of years is pretty exciting. When DASH was originally designed, there were use cases that we didn't address or we addressed but some things were missing. A lot of work went into making sure that things are handled better in the second and the upcoming third edition. A lot of interesting things are happening for broadcast and for live distribution. We're now far more robust, far more efficient, and, in my personal opinion, we are more efficient at what you can get right now out of other streaming systems.

Troy Dreier: Okay. What are the main improvements that you are looking at for this third version?

Alex Giladi: There are a lot of different things that are going into it. One interesting thing is reduction of latency. With HLS you can go to 30 seconds, right now with DASH you can be at several seconds and the thought is that in some advanced cases you can go below a second, and this is something that is going on now.

Troy Dreier: You can handle below a second latency for live 4K video? Are we talking about high resolution?

Alex Giladi: There are tools for doing low latency. The resolution and the specific codec is a completely orthogonal problem. The problem that is handled by DASH is how to signal this and how to make sure that you can actually get to this. What is in there in terms of codec is a different question. This is actually the nice thing about DASH versus many other systems. You can use DASH with completely different codecs. It's up to the implementation. For instance, there are people that are using DASH with VP9 and it works perfectly well.

Troy Dreier: We're going to see a new version in the fall, is that correct?

Alex Giladi: There is the latest amendment, fourth amendment, which is the last thing we're going to have until the next version, until the next edition. It is being finalized now.

Troy Dreier: Fantastic. Well, I know we all can't wait to see what you guys have come up with. Thank you very much for joining me here today.

Alex Giladi: Thank you.

Troy Dreier: All right. Coming to you from Streaming Media East, this is Troy Dreier.

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