Organisation internationale de normalisation

3.2Software copyright disclaimer text

3.2.1.1.1.1.1.1.1JCTVC-D022 USNB Contribution: Response to WG11 resolution 10.1.4 of the 94th meeting [A. G. Tescher for USNB of WG11]

In response to WG11 resolution 10.1.4 of the 94th WG11 meeting, the USNB of WG11 agreed with the spirit of the conclusions and recommendations expressed in WG11 N11645 [a document produced for WG11 corresponding to the content of JCTVC-C001] in regard to software copyright for HEVC reference software development.

3.3Discussion with MPEG Requirements and Video

A discussion of these subjects was held as a joint session with the MPEG Requirements and Video sections.

In a discussion of the screen coding coding topic, it was noted that the WG 11 NBs of Finland, China and the US consider "screen content" coding within the scope of HEVC. The view of the Japan NB is recorded above. After discussion, it was agreed that screen content is considered within the scope, but it should not become a major focus in the work, must not cause a schedule delay, and must not put complex features in "mainstream" profile(s) that are only for that purpose.

The subject of bitstream scalability was also discussed ‒ e.g., temporal & spatial scalability, chroma format scalability between 4:4:4/4:2:2/4:2:0, and similar things.

After discussion, it was agreed that these capabilities are desirable for HEVC (including for its first version), but that work on these topics should not affect the timeline (or become a major distraction).

It was agreed that WG11 would revise its requirements document stating its views on the requirements for HEVC. This document was issued by WG11 as a public WG 11 output document N11872, which was made publicly available at http://mpeg.chiariglione.org/working_documents/mpeg-h/vision-apps-reqs.zip.

The VCEG requirements document regarding the project already indicated that support for bitstream scalability was desirable, and VCEG had previously expressed its view that screen content coding should be considered within the scope of the work. The VCEG requirements document was not further reviewed in the discussions at the meeting.

In regard to the software copyright disclaimer, it was noted that the USNB of WG 11 was supportive of the spirit of the previously-expressed conclusions and recommendations. The status on this topic was otherwise essentially unchanged since that reported at the preceding meeting.

There was no disagreement regarding the suggestion that JCT-VC may move forward with using one of the two suggested wordings and removing other copyright wordings from the software. Action on the topic was deferred to the next meeting. The tentative plan established was to resolve the topic in March.