The DCT is every so often referred to as “type II DCT” in programming help context coding help program engineering family coding help transforms as in discrete cosine transform, and programming help corresponding inverse IDCT is denoted as “type III DCT”. Before computing programming help DCT coding help programming help 8×8 block, its values are shifted from application engineering advantageous range to one centered on zero. For an 8 bit image, each entry in programming help original block falls in programming help range . The midpoint coding help programming help range during this case, programming help value 128 is subtracted from each entry to provide software engineering data range that is centered on zero, so that programming help modified range is . This step reduces programming help dynamic range necessities in programming help DCT processing stage that follows. If we carry out this transformation on our matrix above, we get programming help following rounded to programming help nearest two digits beyond programming help decimal point:Note programming help top left corner entry with programming help rather large importance.