incorrect size of p[ x ] and mWeight[ x ][ y ] for MIP in 8.4.5.2.1

[lixinwei]

8.4.5.2.1 Matrix-based intra sample prediction
current specification in JVET-O2001-vE:

For the generation of the input samples p[ x ] with x = 0..2 * inSize − 1, the following applies

shall be corrected to:

For the generation of the input samples p[ x ] with x = 0..inSize − 1, the following applies

and current specification in JVET-O2001-vE:

– The weight matrix mWeight[ x ][ y ] with x = 0..2 * inSize − 1, y = 0..predC * predC − 1 is derived by invoking the MIP weight matrix derivation process as specified in clause 8.4.5.2.3 with MipSizeId[ xTbCmp ][ yTbCmp ] and modeId as inputs.

shall be corrected to:

– The weight matrix mWeight[ x ][ y ] with x = 0..inSize − 1, y = 0..predC * predC − 1 is derived by invoking the MIP weight matrix derivation process as specified in clause 8.4.5.2.3 with MipSizeId[ xTbCmp ][ yTbCmp ] and modeId as inputs.

Because the variable inSize is the size of the input samples p[x], so no need to multiply 2.

[bbross]

Good catch! Thanks!
Fixed in a document we are preparing to be submitted as an editorial input
to the 16th JVET meeting.