#1121 closed defect (invalid)

Typo in equations in C.24 and C.25 of C.7 Subpicture sub-bitstream extraction process (VVC D9)

Reported by: e.thomas Owned by:
Priority: minor Milestone:
Component: spec Version:
Keywords: Cc: ksuehring, bbross, XiangLi, fbossen, jvet@…

Description

Wrong placement of parenthesis in C.24 and C.25

(C.24)
subpicWidthInLumaSamples = min( ( sps_subpic_ctu_top_left_x[ subpicIdx ] + sps_subpic_width_minus1[ subpicIdx ] + 1 ) * CtbSizeY, pps_pic_width_in_luma_samples ) − sps_subpic_ctu_top_left_x[ subpicIdx ] * CtbSizeY

(C.25)
subpicHeightInLumaSamples = min( ( sps_subpic_ctu_top_left_y[ subpicIdx ] + sps_subpic_height_minus1[ subpicIdx ] + 1 ) * CtbSizeY, pps_pic_height_in_luma_samples ) − sps_subpic_ctu_top_left_y[ subpicIdx ] * CtbSizeY

It should be:

(C.24)
subpicWidthInLumaSamples = min( ( sps_subpic_ctu_top_left_x[ subpicIdx ] + sps_subpic_width_minus1[ subpicIdx ] + 1 ) * CtbSizeY, pps_pic_width_in_luma_samples − sps_subpic_ctu_top_left_x[ subpicIdx ] * CtbSizeY)

(C.25)
subpicHeightInLumaSamples = min( ( sps_subpic_ctu_top_left_y[ subpicIdx ] + sps_subpic_height_minus1[ subpicIdx ] + 1 ) * CtbSizeY, pps_pic_height_in_luma_samples − sps_subpic_ctu_top_left_y[ subpicIdx ] * CtbSizeY)

Change history (2)

comment:1 Changed 15 months ago by skupin

The parenthesis placement in D9 and D10 seems correct. The min term derives the accurate right/bottom boundary position from which then the left/top boundary position is subtracted to derive width/height.

comment:2 Changed 15 months ago by yk

  • Resolution set to invalid
  • Status changed from new to closed
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