TY - GEN
T1 - Integer fast lapped orthogonal transform based on direct-lifting of dcts for lossless-to-lossy image coding
AU - Suzuki, Taizo
AU - Ikehara, Masaaki
PY - 2011/8/18
Y1 - 2011/8/18
N2 - Integer lapped orthogonal transforms (LOTs) are vital technologies for the unification of lossless and lossy image coding, called lossless-to-lossy image coding. In this paper, we present an efficient realization of integer fast LOT (FLOT) based on direct-lifting of discrete cosine transforms (DCTs) which are type-II, III and IV. Although the conventional integer FLOTs suffer from degradation of coding performance due to much rounding error generated by cascading lifting structures, this paper presents a realization of a simpler, faster and more efficient transform with only some adders, 1-bit shifters and direct use of DCTs for lifting coefficients. As result, the proposed method is validated in lossless-to-lossy image coding.
AB - Integer lapped orthogonal transforms (LOTs) are vital technologies for the unification of lossless and lossy image coding, called lossless-to-lossy image coding. In this paper, we present an efficient realization of integer fast LOT (FLOT) based on direct-lifting of discrete cosine transforms (DCTs) which are type-II, III and IV. Although the conventional integer FLOTs suffer from degradation of coding performance due to much rounding error generated by cascading lifting structures, this paper presents a realization of a simpler, faster and more efficient transform with only some adders, 1-bit shifters and direct use of DCTs for lifting coefficients. As result, the proposed method is validated in lossless-to-lossy image coding.
KW - Direct-lifting
KW - discrete cosine transform (DCT)
KW - fast lapped orthogonal transform (FLOT)
KW - lossless-to-lossy image coding
UR - http://www.scopus.com/inward/record.url?scp=80051642202&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80051642202&partnerID=8YFLogxK
U2 - 10.1109/ICASSP.2011.5946784
DO - 10.1109/ICASSP.2011.5946784
M3 - Conference contribution
AN - SCOPUS:80051642202
SN - 9781457705397
T3 - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings
SP - 1525
EP - 1528
BT - 2011 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011 - Proceedings
T2 - 36th IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2011
Y2 - 22 May 2011 through 27 May 2011
ER -