TY - GEN
T1 - Fast rate allocation schemes for JPEG2000
AU - Wu, Zongze
AU - Zheng, Nanning
PY - 2005
Y1 - 2005
N2 - JPEG2000 can provide excellent rate-distortion performance. However, the conventional post compression rate- distortion (PCRD) optimum algorithm in JPEG2000 is not enough efficient for IC design. Calculation and storage of the rate-distortion slope and search of the optimum truncation points are complexity and they require a large quantity of memory. In this paper, two schemes are proposed to reduce computation and memory for the real-time rate allocation in JPEG2000. A simplification scheme is used to facilitate calculation of the rate-distortion slopes based on some approximate treatments by means of logarithm expression. The other scheme can find all the truncation points for every code-block through a round search based on the 256 quality layers which are divided in parallel with tierl-coding. Compared with PCRD, PSNR of reconstructed images using our schemes decrease very slightly which can be omitted in most applications.
AB - JPEG2000 can provide excellent rate-distortion performance. However, the conventional post compression rate- distortion (PCRD) optimum algorithm in JPEG2000 is not enough efficient for IC design. Calculation and storage of the rate-distortion slope and search of the optimum truncation points are complexity and they require a large quantity of memory. In this paper, two schemes are proposed to reduce computation and memory for the real-time rate allocation in JPEG2000. A simplification scheme is used to facilitate calculation of the rate-distortion slopes based on some approximate treatments by means of logarithm expression. The other scheme can find all the truncation points for every code-block through a round search based on the 256 quality layers which are divided in parallel with tierl-coding. Compared with PCRD, PSNR of reconstructed images using our schemes decrease very slightly which can be omitted in most applications.
UR - https://www.scopus.com/pages/publications/33846979422
U2 - 10.1109/SIPS.2005.1579963
DO - 10.1109/SIPS.2005.1579963
M3 - 会议稿件
AN - SCOPUS:33846979422
SN - 0780393341
SN - 9780780393349
T3 - IEEE Workshop on Signal Processing Systems, SiPS: Design and Implementation
SP - 740
EP - 743
BT - SiPS 2005
T2 - SiPS 2005: IEEE Workshop on Signal Processing Systems - Design and Implementation
Y2 - 2 November 2005 through 4 November 2005
ER -