Research On Wavelet Image Compression Application In Dightal Cinema

Wavelet is important technique for temporal-frequency analysis, in 1990s it came into use in image compression. Especially from the mid-1990s Sweldens and Daubenchies et al. innovated so called "lifting" method to construct wavelet , which accelerated and enlarged wavelet application in practice.As a developing new technology, Digital Cinema gets more and more attentions and being a landmark of digital innovation in broadcasting world after Digital TV. Movie picture size is very bigand its color information is very rich too so that digitized data quantity is very huge, thereby image compression technology is key stone in Digital Cinema. In fact, the conventional MPEG etc. compression technology can not support Digital Cinema development in the future.Under above background , this dissertation aims to research wavelet video&image compression application and exploit the video compression solution an-d feasible approach according with the requirement of development in Digital Cinema. It's main investigation as following:1. Basic research on wavelet image compression theoryDone research on wavelet image compression theory, especially "lifting" wavelet transform elements, superiority and construction approach with filter banks; Evaluated and analyzed performance about several reversible integer to integer wavelet transforms for image compression; Analyzed mathematical properties of the JPEG2000wavelet filter: LeGall 5/3 and Daubechies 9/7. Done research on JPEG2000 serial standards which adopted wa-velet transform in image compression, especially for Part-1( core and system ) and Part-3 (Motion JPEG2000), analyzed compression engine of encode & decode and impact on compression performance of every module.2. Digital Cinema technologyDone research on digitization and image processing method in Digital Cinema, analyzed the shortages of MPEG2 when it was applied to Digital Cinema compression; Investigation the requirement of development of Digital Cinema in the future, evaluated JPEG2000 and H.264/AVC FRExt compression application characteristic, compression performance and compared their adaptability in Digital Ci ne-ma.3. Digital Cinema encoderDiffered from the most used standard MPEG2, we brought forward a digital cinema image compression encoder solution based JP -EG2000, which is much more better for digital cimema compression than MPEG2 scheme. We designed hardware and software for this solution and at last finished the digital cinema encoder, it can support multi-format of movie picture to compress and packetd the digital copy to distribute.4. 3-D wavelet image compression in Digital CinemaBased JPEG2000 digital cinema scheme we brought forward MC-JPEG200 scheme for digital cinema compression application,which can keep compatible with JPEG2000 scheme and furthermore obtain the better performance in the same condition.With MC-JPEG20000, we applied a new high efficient digital right protection technique, which used move vector as security key, thus it didn't need more compution compared the conventional method.