In VVC v2 spec text the zero out transform block sizes Log2ZoTbWidth and Log2ZoTbHeight are used in “9.3.4.2.4 Derivation process of ctxInc for the syntax elements last_sig_coeff_x_prefix and last_sig_coeff_y_prefix” although it was decided by the adoption of JVET-N0194 to use the full block sizes Log2TbWidth and Log2TbHeight (instead of Log2ZoTbWidth and Log2ZoTbHeight).

This bug has been introduced in v2 and should be fixed as follows:

• In residual_coding() syntax table, move the derivation of Log2FullTbWidth = log2TbWidth and Log2FullTbHeight = log2TbHeight right after Log2ZoTbHeight = Min( log2TbHeight, 5 ), i.e. before last_sig_coeff_x_prefix.
• In “9.3.4.2.4 Derivation process of ctxInc for the syntax elements last_sig_coeff_x_prefix and last_sig_coeff_y_prefix” replace "Log2ZoTbHeight/Width" with "Log2FullTbHeight/Width".

There are four typos in JVET-AD2006-v1. “nnpf_base_flag” should be “nnpfc_base_flag”. “nnpfc_absent_input_pic_flag” should be “nnpfc_absent_input_pic_zero_flag”. “ofnnpfc_extended_patch_width_cd_delta_minus1 + 1 + 2 * nnpfc_overlap and inpPatchWidth” should be “of nnpfc_extended_patch_width_cd_delta_minus1 + 1 + 2 * nnpfc_overlap and inpPatchWidth”. “ofnnpfc_extended_patch_height_cd_delta_minus1 + 1 + 2 * nnpfc_overlap and inpPatchHeight” should be “of nnpfc_extended_patch_height_cd_delta_minus1 + 1 + 2 * nnpfc_overlap and inpPatchHeight”.

SEINeuralNetworkingPostFiltering.cpp has constraints checks related to the frame-rate upsampling purpose. However, those constraints are not reached right now. When an NNPF is activated for a picture, the NNPFC is added to a list that is then traversed to check the constraints, and that list is empty.