In the current WD text, I only found the following limitation for the prediction direction of DBBP. I.7.4.9.6 It is a requirement of bitstream conformance that, when dbbp_flag[ x0 ][ y0 ] is equal to 1, inter_pred_idc[ x0 ][ y0 ] shall not be equal to PRED_BI. However, the HTM has forced any inherited bi-prediction MV in DBBP to be forward prediction. I think, a bug-fix should be added on I.8.5.3.2.1, point 14 as following

14. When predFlagL0 is equal to 1 and predFlagL1 is equal to 1, and ( nOrigPbW + nOrigPbH ) is equal to 12 or dbbp_flag is equal to 1, the following applies:

refIdxL1 = −1 predFlagL1 = 0

Related to JCT3V-C0152:

In software there are several changes related to VSP regarding the availiaility of blocks in the deblocking filter and AMVP that are not reflected in the draft. Input by proponent is required.

At the strasburg meeting, ARP mismatch between text and software was reported. The issues are mainly related to F0105, F0123 and I0051. This ticket reports the details and a suggested fix (relative to HTM-12.2 and J1001_v3). The suggested fix doesn't affect coding results in CTC. The suggested patch includes the four macros (FIX_TICKET_89_REFIDX, FIX_TICKET_89_REFCHECK, FIX_TICKET_89_REFCLEAN, and FIX_TICKET_89_REFCLEAN2).

Issues: (1)Software issue(FIX_TICKET_89_REFIDX):

• typos in arpIdx selection

(2)Software and text issue(FIX_TICKET_89_REFCHECK):

• wrong or missing availablity checks in inter-view ARP

Specifically, in inter-view ARP, the ARP reference list X is replaced to Z as proposed in F0123 and I0051, so the software and text should be modified to check the Z rather than X. That's the reasonable harmonization with F0105.

Additionally, a software clean up is provided (FIX_TICKET_89_CLEAN and FIX_TICKET_89_CLEAN2).

Note: FIX_TICKET_89_CLEAN removes unnecessary conditions (2Nx2N check and depth chech are processed before ARP function in text and software, so we can remove them) and removes non-used variable (pNewMvFiled). FIX_TICKET_89_CLEAN2 merges uni-prediction part and bi-prediction part into one part as text specifies. The CLEAN2 changes can be large but it really helps cleanup.