On compatibility of order-8 integer cosine transforms and the discrete cosine transform
Refereed conference paper presented and published in conference proceedings

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AbstractThe author shows that integer cosine transforms (ICTs) are functionally compatible with discrete cosine transforms (DCTs) that are used in image coding. It is proved that the w-bit ICT can inversely transform exactly represented DCT coefficients with less mean-square-error than the w-bit DCT for w equal to 4, 3 and 2 and scaling factors of ICTs implemented using 8 bits. Conversely, an exactly represented DCT can inversely transform the coefficients from the w-bit ICT with less-mean-square-error than the w-bit DCT. Therefore, the ICTs can be said to be compatible with the DCT. These ICTs, while being considered as new transforms, can also be regarded as alternative and better ways to implement the DCT when the number of bits for representing kernel components are restricted to 4, 3, and 2.
All Author(s) ListCham W.K., Wu F.S.
Name of Conference1990 IEEE Region 10 Conference on Computer and Communication Systems - IEEE TENCON '90
Start Date of Conference24/09/1990
End Date of Conference27/09/1990
Place of ConferenceHong Kong
Country/Region of ConferenceHong Kong
Pages447 - 449
LanguagesEnglish-United Kingdom

Last updated on 2021-08-06 at 23:10