JCTVC-O0009 JCT-VC AHG report: High-level syntax for HEVC extensions (AHG9) [M. M. Hannuksela, J. Boyce, Y. Chen, S. Deshpande, A. Norkin, Y.-K. Wang]
It was noted that there was a substantial number of relevant contributions.
Regarding the high level syntax for auxiliary pictures with consideration of JCTVC-N0063/JCT3V-E0049 as well as signalling for carrying alpha channel and 4:4:4 chroma enhancement as auxiliary pictures, the following was noted:
A study of JCTVC-N0063/JCT3V-E0049 resulted into a follow-up contribution JCTVC-O0041/JCT3V-F0031 refining a few details. JCTVC-O0041/JCT3V-F0031 was uploaded on 19th September and announced in the email reflector. For coordination with 3D work, depth is suggested to be one of the auxiliary picture types.
The 4:4:4 chroma enhancement aspect was included in JCTVC-O0041/JCT3V-F0031.
An input contribution JCTVC-O0132 has been submitted on alpha channel signaling for the auxiliary picture layer design of JCTVC-O0041/JCT3V-F0031.
JCTVC-O0135 proposed to specify new NAL unit type(s) to carry auxiliary pictures rather than using auxiliary picture layers proposed in JCTVC-O0041/JCT3V-F0031.
Regarding JCTVC-N0355/JCT3V-E0092 and other mechanisms to extend the number of layers (beyond 64) in comparison with reserving nuh_layer_id value of 63 to provide an extension, in terms of functionality supported and signalling efficiency, two related input contributions were noted: JCTVC-O0137 and JCTVC-O0200.
