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22nd August 2016, 07:00 | #1 | Link |
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Cannot find the derivation process of ref_idx_lX.
I am reading the H.265 standard.
In 8.5.3.2, if merge_flag[ xPb ][ yPb ] is not equal to 1, and if inter_pred_idc[ xPb ][ yPb ] is equal to PRED_LX or PRED_BI, refIdxLX is set to ref_idx_lX[ xPb ][ yPb ]. However, I cannot find derivation process of ref_idx_lX after searching the keyword ref_idx_lX or ref_idx_l0. How does the ref_idx_lX come from? By the way, another question, will merge_flag[ xPb ][ yPb ] set to 1 when the 8.5.3.2.1 is invoked at the first time in the whole encoding process? (Because 8.5.3.2.3 requires MvLX, which is defined after the process 8.5.3.2. If merge_flag[ xPb ][ yPb ] is equal to 1, it seems that MvLX is not available.) |
22nd August 2016, 19:27 | #2 | Link |
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ref_idx_l0 and ref_idx_l1 are coded as part of the prediction unit, see 7.3.8.6/7.4.9.6
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23rd August 2016, 07:12 | #3 | Link | |
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Quote:
In 7.4.9.6, the description of ref_idx_l0 is "ref_idx_l0[ x0 ][ y0 ] specifies the list 0 reference picture index for the current prediction unit." This is difficult to understand for me. For example, the description of num_tile_columns_minus1 is "num_tile_columns_minus1 plus 1 specifies the number of tile columns partitioning the picture. num_tile_columns_minus1 shall be in the range of 0 to PicWidthInCtbsY − 1, inclusive." And to know what CtbAddrRsToTs[ ctbAddrRs ] exactly is, the standard gives the code (in 6.5.1). All of them are clearly defined. However, I cannot find what value is assigned to ref_idx_l0 and how to get the value. |
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hevc. h.265 |
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