Title :
Structurally regular integer discrete cosine transform for low-bit-word-length coefficients
Author :
Suzuki, Taizo ; Ikehara, Masaaki
Author_Institution :
Dept. of Electron. & Electr. Eng., Keio Univ., Yokohama, Japan
fDate :
May 30 2010-June 2 2010
Abstract :
This paper presents an IntDCT with only dyadic values such as k/2n (k, n ∈ N). Although some IntDCTs have been proposed, they are unsuitable for lossless-to-lossy image coding in low-bit-word-length (coefficients). First, the proposed M-channel lossless WHT (LWHT) can be constructed by only (log2 M)-bit-word-length and has structural regularity. Then, our 8-channel IntDCT keeps good coding performance even In low-bit-word-length because LWHT, which is main part of IntDCT, can be implemented by 3-bit-word-length. Finally, our method is validated In lossless-to-lossy image coding.
Keywords :
Hadamard transforms; Walsh functions; discrete cosine transforms; image coding; IntDCT; M-channel lossless WHT; Walsh-Hadamard transform; dyadic value; lossless-to-lossy image coding; low-bit-word-length coefficient; structurally regular integer discrete cosine transform; Costs; Discrete cosine transforms; Discrete transforms; Image coding; Internet; Lattices; Modulation coding; Pulse modulation; Transform coding; Two dimensional displays; IntDCT; LWHT; dyadic values; lossless-to-lossy image coding; low-blt-word-length;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537445
