id summary reporter owner description type status priority milestone component version resolution keywords cc
729 7.4.5.4: Unclear LumaWeightLX / ChromaWeightLX range AlexisLefebvre bbross "Hi,
In chapter 8.5.2.2.3.2, weighted predictions is performed according to LumaWeightLX and ChromaWeightLX.
In chapter 7.4.5.4 those values are defined by:
""The variable LumaWeightL0[ i ] is specified by (1 << luma_log2_weight_denom ) + delta_luma_weight_l0[ i ]. When
luma_weight_l0_flag[ i ] is equal to 1, the value of delta_luma_weight_l0[ i ] shall be in the range of −128 to 127,
inclusive. When luma_weight_l0_flag[ i ] is equal to 0, LumaWeightL0[ i ] is inferred to be equal to 2^luma_log2_weight_denom
for RefPicList0[ i ].""
I suspect a typo here. Is the following more accurate ? :
""The variable LumaWeightL0[ i ] is specified by (1 << luma_log2_weight_denom ) + delta_luma_weight_l0[ i ]. When
luma_weight_l0_flag[ i ] is equal to 1, the value of '''LumaWeightL0'''[ i ] shall be in the range of −128 to 127,
inclusive. When luma_weight_l0_flag[ i ] is equal to 0, LumaWeightL0[ i ] is inferred to be equal to 2^luma_log2_weight_denom
for RefPicList0[ i ].""
Same remark for ChromaWeightLX definition.
Regards,
Alexis
" defect closed minor Text D8 (J1003) d7 fixed bbross wjhan jct-vc@…