The Research Of Image Compression In DCI

Because the digital picture processing and the digital projector technical mature with perfect, the digital movie technique also develops gradually and the picture compression also becomes its key compoment. The picture of the digital cinema requires not only the subject and object view quality and the high compression ratio, but also the convenience for stream deliver and broadcast which is discussed in DCI's documents.This thesis research and analysis the picture compression of DCI that adopt the wavelet based picture compression standard of the JPEG2000, and finish a compression system which match the prescript of the DCI norm completely first on the foundation of the reference software JASPER of the JPEG2000.On this foundation, this thesis put forward a kind of 3D wavelet coding methon with MXF, according to the provision of the DCI and the characteristics of the digital movie picture. This method combines two kinds of video stream with different frequency rates into a single file and makes them compatible.Because the JPEG2000 standard doesn't make use of the inter-redundancy fo picture, this thesis used the MC-EZBC project as a substitute to the compression project in the DCI. The result shows MC-EZBC project can generate lower rate of the digital movie video.In consideration of the JPEG2000 compresses calculate way more complicated, and relatively consume, this thesis return to the JPEG2000 abreast the calculate way did a certain research, and carry out a compresses a management system abreast according to the JPEG2000 of the distribute type, compared with other type's softwares, that system is under the premise that satisfy credibility request, the movement speed contain very great exaltation. In order to minimize time cost on the JPEG2000 compression, an parallel task managing system is proposed, which can run on LAN based cluster and automatically start JPEG2000 compression.