[Mp4-tech] [H.264]A question about the colPic

[Tan Rui -- Huawei]

Hi, All Experts,
When I read the Table 8-6 in the H.264 which gives the calculation about the colPic. I find it is difficult to understand the following conditions:
When (field_pic_flag==0 && RefPicList1[0]==a complementary field pair && md_field_decoding_flag==1), the colPic will determined by the
CurrMbAddr, Which will be the Top-field_To_Top-field or Bottom-field_To_Bottom-field mapping. 
My question is that : I think the mapping should be the Top-field_To_Bottom-field or Bottom-field_To_Top-field, because the timing gap between
the opposite fields will be shorter than the timing gap between the same fields. Can someone make it clear? Thanks.
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