11 – Scalable Encryption and Multi-Access Control for Multimedia

摘要: Publisher Summary This chapter provides an overview of scalable encryption and multi-access for digital rights management (DRM) other multimedia applications. Both, work with coding. A framework coding is proposed by Zhu, Li, Feng. codestream organized on some fundamental building blocks known as Scalable Building Blocks (SBBs). The presents MPEG-4 FGS JPEG 2000 standards, illustrates technologies. encodes a video sequence into two layers: non-scalable base layer that offers the lowest quality bitrate codestream, enhancement in large range signal-to-noise ratios (SNRs) bitrates to layer. wavelet-based image standard. ensures encrypted maintains certain level scalability. granularity after key consideration design. Some schemes are syntax compliant ensure different users can extract representations from single fit their respective applications, user consume only particular he or she authorized to. ends note it new research area, many issues still remain be studied optimized future endeavors.