//    Line buffer, delay one line
Line_Buffer u10    (    .clken(VGA_Read),
                    .clock(PPI_CLK),
                    .shiftin(mYCbCr_d),
                    .shiftout(m3YCbCr));

Line_Buffer u11    (    .clken(VGA_Read),
                    .clock(PPI_CLK),
                    .shiftin(m3YCbCr),
                    .shiftout(m4YCbCr));

wire    [15:0]    m4YCbCr;
wire    [15:0]    m5YCbCr;
wire    [8:0]    Tmp1,Tmp2;
wire    [7:0]    Tmp3,Tmp4;

assign    Tmp1    =    m4YCbCr[7:0]+mYCbCr_d[7:0];
assign    Tmp2    =    m4YCbCr[15:8]+mYCbCr_d[15:8];
assign    Tmp3    =    Tmp1[8:2]+m3YCbCr[7:1];
assign    Tmp4    =    Tmp2[8:2]+m3YCbCr[15:9];
assign    m5YCbCr    =    {Tmp4,Tmp3};