data hasnt been embedded in dc coeffs,therefore results in a better histographic response.unlike methods like jsteg where quantized coeffs wid value 1 are not altered because they can be made equal to zero,here they can acquire a value of -1,instead.

-data hasnt been embedded in dc coeffs,therefore results in a better histographic response.unlike methods like jsteg where quantized coeffs wid value 1 are not altered because they can be made equal to zero,here they can acquire a value of-1,instead.