dc = block[0] = (block[0] + (q >> 1)) / q;
start_i = 1;
last_non_zero = 0;
- bias = s->q_intra_matrix16[qscale][1];
- qmat = s->q_intra_matrix16[qscale][0];
+ if(n<4){
+ bias = s->q_intra_matrix16[qscale][1];
+ qmat = s->q_intra_matrix16[qscale][0];
+ }else{
+ bias = s->q_chroma_intra_matrix16[qscale][1];
+ qmat = s->q_chroma_intra_matrix16[qscale][0];
+ }
} else {
start_i = 0;