[Mp4-tech] [H.264] cabac_zero_word

[EricChuang via.com.tw]

Hi Experts,
>From spec. 7.4.2.10 section that it seems cabac_zero_word is just a tool
for decoder to meet the BinCountsInNALunits constraint when CABAC is
used. It reads that BinCountsInNALunits shall not exceed
(32/3)*NumBytesInVclNALunits + (RawMbBits * PicSizeInMbs)/32. Could
anyone tell me why it shall not excceds this magic number, and how this
equation is derived ?
Best Regards,
Eric
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