PROCEEDINGS ARTICLE | January 18, 2004
Proc. SPIE. 5308, Visual Communications and Image Processing 2004
KEYWORDS: Lithium, Image compression, Image processing, Video, Wavelets, JPEG2000, Image quality, Video compression, Digital video recorders, Video coding
Set Partitioned Embedded bloCK coder (SPECK) has been found to
perform comparable to the best-known still grayscale image coders
like EZW, SPIHT, JPEG2000 etc. In this paper, we first propose
Color-SPECK (CSPECK), a natural extension of SPECK to handle color
still images in the YUV 4:2:0 format. Extensions to other YUV
formats are also possible. PSNR results indicate that CSPECK is
among the best known color coders while the perceptual quality of
reconstruction is superior than SPIHT and JPEG2000. We then
propose a moving picture based coding system called Motion-SPECK
with CSPECK as the core algorithm in an intra-based setting.
Specifically, we demonstrate two modes of operation of
Motion-SPECK, namely the constant-rate mode where every frame is
coded at the same bit-rate and the constant-distortion mode, where
we ensure the same quality for each frame. Results on well-known
CIF sequences indicate that Motion-SPECK performs comparable to
Motion-JPEG2000 while the visual quality of the sequence is in
general superior. Both CSPECK and Motion-SPECK automatically
inherit all the desirable features of SPECK such as embeddedness,
low computational complexity, highly efficient performance, fast
decoding and low dynamic memory requirements. The intended
applications of Motion-SPECK would be high-end and emerging video
applications such as High Quality Digital Video Recording System,
Internet Video, Medical Imaging etc.
