Databases Reference
In-Depth Information
(a)
(b)
F I GU R E 13 . 5
Taking the discrete Fourier transform of a sequence.
(a)
(b)
(c)
F I GU R E 13 . 6
Taking the discrete cosine transform of a sequence.
the compaction ability of the DCT is very close to that of the KLT. As many sources can be
modeled as Markov sources with high values for
, this superior compaction ability has made
the DCT the most popular transform. It is a part of many international standards, including
JPEG, MPEG, and CCITT H.261, among others.
ρ
