scans.txt

# Initial DC scan for Y,Cb,Cr (lowest bit not sent)
0,1,2: 0-0,   0, 1 ;
# First AC scan: send first 5 Y AC coefficients, minus 2 lowest bits:
0:     1-5,   0, 4 ;
# Send all Cr,Cb AC coefficients, minus lowest bit:
# (chroma data is usually too small to be worth subdividing further;
#  but note we send Cr first since eye is least sensitive to Cb)
2:     1-63,  0, 3 ;
1:     1-63,  0, 3 ;
# Send remaining Y AC coefficients, minus 2 lowest bits:
0:     6-63,  0, 4 ;
# Send next-to-lowest bit of all Y AC coefficients:
0:     1-63,  4, 3 ;
2:     1-63,  3, 2 ;
1:     1-63,  3, 2 ;
# send rest of DC coefs
0,1,2: 0-0,   1, 0 ;

0:     1-63,  3, 2 ;
2:     1-63,  2, 1 ;
1:     1-63,  2, 1 ;

0:     1-63,  2, 1 ;
2:     1-63,  1, 0 ;
1:     1-63,  1, 0 ;

0:     1-63,  1, 0 ;