JVET-AQ0174 AHG9: On the Gaussian splatting information SEI message [R. Hooda, J. Jung, Y. He, L. Kerofsky, M. Karczewicz (Qualcomm)]
Referred by Joint AHG to the HLS track.
Chaired by J. Boyce on 13 July at 0955.
The GSC SEI message, as described in JVET-AP0100, includes non-uniform transform and PCA transform tools inherited from V-PCC amd.1. During the MPEG#154 meeting, some syntax details for these tools were modified in V-PCC Amd.1. This contribution proposes corresponding updates of the GSC SEI message to align with this new syntax, for non-uniform quantization and PCA transform of spherical harmonics. It is proposed to adopt these changes in the JVET TuC.
It was suggested that the name region was somewhat confusing and another terminology might be used, such as quantization intervals.
It was suggested that a range limit is needed for gsi_transition_point_delta[ ][ ][ ].
The proposal reduces the bitrate of the SEI message contents but does not affect the coded picture sample values.
Agreed.