iDCT

Originally provided by Intel at AP-922 but in a limited edition. New macro implements a column part for precise iDCT and contains a special rounding trick to improve precision and speed even more. The routine precision satisfies IEEE standard 1180-1990.

Copyright (c) 2000-2001 Peter Gubanov
Rounding trick Copyright (c) 2000 Michel Lespinasse

Download the MASM source code: idct8x8_xmm.asm.

See also:

• Elecard MPEG2 Video Decoder DirectShow® Filter