Incremental Manifest Updates

[technogeek00]

Use Case Description

Usage of manifest signaling mechanisms to provide incremental information updates instead of full document updates as part of a live presentation playout

Working Notes

• DASH MPD Patch Updates and HLS Delta Updates are the equivalent specification mechanisms

Open Questions

• Are there differences in update communication ability between the two forms?
• Does this manifest mechanism have any constraints on the underlying media?

[technogeek00]

A number of interesting deployment scenarios around mechanism usage:

• direct patch providing to clients
• creating patches at the mid-tier/edge from full sources
• creating full sources via patches at the mid-tier/edges

[technogeek00]

Question	Answer
Does the feature relate to an industry streaming use-case?	Yes, Live Streaming
- What is the commonality of this case?	Uncommon
- Is this an established or emerging practice?	Emerging
Does this feature have related mechanisms in both DASH and HLS?	Yes, not exactly equivalent
- What is the maturity of support in both specifications?	DASH - Immature, HLS - Immature
- What is the maturity of implementation support for both specifications?	Needs Investigation, likely Immature for both
- Are there known interoperability issues between specs?	Yes, due to signaling not explicitly equivalent
- Has anyone implemented this interoperably?	No
- Are there features missing in a specification with open proposals for it?	No
Has the industry defined defacto mechanisms not present in both DASH and/or HLS?	No
- Why was functionality defined outside of the main specifications?	N/A
- Has the functionality been standardized elsewhere (DASH-IF, CTA, SVA)?	N/A
- Is the functionality proprietary or openly developed?	N/A
- Could the functionality be incorporated into specifications with evangelism?	N/A