30 Nov
2003
30 Nov
'03
7:56 p.m.
On Nov 24, 2003, at 3:06 AM, forks.tw wrote:
The IMDCT function in MAD seems not easy to understand. Rob Leslie says that it is custom unrolled and factorized implementation. But I still don't know how ... Would you please tell me about the IMDCT algorithm in MAD or any reference documents? Thank you very much!!
ISO/IEC 11172-3 defines the analytical expression of the IMDCT as:
where n is the number of windowed samples (12 for short blocks; 36 for long blocks).
--
Rob Leslie
rob@mars.org