Y_quant =

    28     3     0     0     0     0     0     0
    -4     1    -1     0     0     0     0     0
     0     0    -1    -1     0     0     0     0
     4    -1    -2     0     0     0     0     0
    -1    -3     0     0     0     0     0     0
     0     0     0     0     0     0     0     0
    -1     0     0     0     0     0     0     0
    -1     1     0     0     0     0     0     0