Left bracket is missing for equation 8-919/20/22/23

Current Specification:

xVb = ( x + bv[ 0 ] >> 4 ) ) & ( IbcBufWidthY − 1 ) (8-919) yVb = ( y + bv[ 1 ] >> 4 ) ) & ( CtbSizeY − 1 ) (8-920)

...

xVb = ( x + bv[ 0 ] >> 5 ) ) & ( IbcBufWidthC − 1 ) (8-922) yVb = ( y + bv[ 1 ] >> 5 ) ) & ( CtbSizeC − 1 ) (8-923)

Correction:

xVb = ( x + ( bv[ 0 ] >> 4 ) ) & ( IbcBufWidthY − 1 ) (8-919) yVb = ( y + ( bv[ 1 ] >> 4 ) ) & ( CtbSizeY − 1 ) (8-920)

...

xVb = ( x + ( bv[ 0 ] >> 5 ) ) & ( IbcBufWidthC − 1 ) (8-922) yVb = ( y + ( bv[ 1 ] >> 5 ) ) & ( CtbSizeC − 1 ) (8-923)

1. Following hightlighted in bold (CtbSizeY ) can be removed
2. Following hightlighted in bold and italic (j) is typo

The list CtbToSubPicIdx[ ctbAddrRs ] for ctbAddrRs ranging from 0 to PicSizeInCtbsY ? 1, inclusive, specifying the conversion from a CTB address in picture raster scan to a subpicture index, is derived as follows: for( ctbAddrRs = 0; ctbAddrRs < PicSizeInCtbsY; ctbAddrRs++ ) {

posX = ctbAddrRs % PicWidthInCtbsY * CtbSizeY posY = ctbAddrRs / PicWidthInCtbsY * CtbSizeY CtbToSubPicIdx[ ctbAddrRs ] = −1 for( i = 0; CtbToSubPicIdx[ ctbAddrRs ] < 0 && i <= sps_num_subpics_minus1; i++ ) { (31)

if( ( posX >= subpic_ctu_top_left_x[ i ] * CtbSizeY ) &&

( posX < ( subpic_ctu_top_left_x[ i ] + subpic_width_minus1[ i ] + 1 ) * CtbSizeY ) && ( posY >= subpic_ctu_top_left_y[ i ] * CtbSizeY ) && ( posY < ( subpic_ctu_top_left_y[ i ] + subpic_height_minus1[ i ] + 1 ) * CtbSizeY ) )

CtbToSubPicIdx[ ctbAddrRs ] = i

}

} The list NumSlicesInSubpic[ i ] and SliceSubpicToPicIdx[ i ][ k ], specifying the number of rectangular slices in the i-th subpicture and picture-level slice index of the k-th slice in the i-th subpicture, are derived is derived as follows: for( j = 0; j <= sps_num_subpics_minus1; j++ )

NumSlicesInSubpic[ j ] = 0

for( i = 0; i <= num_slices_in_pic_minus1; i++ ) {

posX = CtbAddrInSlice[ i ][ 0 ] % PicWidthInCtbsY * CtbSizeY posY = CtbAddrInSlice[ i ][ 0 ] / PicWidthInCtbsY * CtbSizeY for( j = 0; j <= sps_num_subpics_minus1; j++ ) {

if( ( posX >= subpic_ctu_top_left_x[ j ] * CtbSizeY ) && (32)

( posX < ( subpic_ctu_top_left_x[ j ] + subpic_width_minus1[ j ] + 1 ) * CtbSizeY ) && ( posY >= subpic_ctu_top_left_y[ j ] * CtbSizeY ) && ( posY < ( subpic_ctu_top_left_y[ j ] + subpic_height_minus1[ j ] + 1 ) * CtbSizeY ) ) {

SliceSubpicToPicIdx[ j ][ NumSlicesInSubpic[ j ] ] = i NumSlicesInSubpic[ j ]++

}

}

}

It is suggested to correct calculation of subpicture layout syntax length to cover the cover cases that subpicture width/height = cTbSizeY (Changes are highlighted in Bold):

subpic_ctu_top_left_x[ i ] specifies horizontal position of top left CTU of i-th subpicture in unit of CtbSizeY. The length of the syntax element is Max(1, Ceil( Log2(Ceil( pic_width_max_in_luma_samples / CtbSizeY) ) ) ) bits. When not present, the value of subpic_ctu_top_left_x[ i ] is inferred to be equal to 0.

subpic_ctu_top_left_y[ i ] specifies vertical position of top left CTU of i-th subpicture in unit of CtbSizeY. The length of the syntax element is Max(1, Ceil( Log2( Ceil( pic_height_max_in_luma_samples / CtbSizeY ) ) ) ) bits. When not present, the value of subpic_ctu_top_left_y[ i ] is inferred to be equal to 0.

subpic_width_minus1[ i ] plus 1 specifies the width of the i-th subpicture in units of CtbSizeY. The length of the syntax element is Max(1, Ceil( Log2( Ceil( pic_width_max_in_luma_samples / CtbSizeY ) ) ) ) bits. When not present, the value of subpic_width_minus1[ i ] is inferred to be equal to Ceil( pic_width_max_in_luma_samples / CtbSizeY ) − 1.

subpic_height_minus1[ i ] plus 1 specifies the height of the i-th subpicture in units of CtbSizeY. The length of the syntax element is Max(1, Ceil( Log2( Ceil( pic_height_max_in_luma_samples / CtbSizeY ) ) ) ) bits. When not present, the value of subpic_height_minus1[ i ] is inferred to be equal to Ceil( pic_height_max_in_luma_samples / CtbSizeY ) − 1.