Scalable protection for MPEG-4 fine granularity scalability

doi:10.1109/TMM.2005.843340

CORC > 北京大学 > 信息科学技术学院

	Scalable protection for MPEG-4 fine granularity scalability
	Zhu, BB ; Yuan, C ; Wang, YD ; Li, SP
刊名	ieee transactions on multimedia
	2005
关键词	digital rights management FGS fine granularity scalability (FGS) layered access control MPEG-4 multimedia protection scalable protection scalable video encryption selective encryption video encryption VIDEO ENCRYPTION
DOI	10.1109/TMM.2005.843340
英文摘要	The newly adopted MPEG-4 fine granularity scalability (FGS) video coding standard offers easy and flexible adaptation to varying network bandwidths and different application needs. Encryption for FGS should preserve such adaptation capabilities and enable intermediate stages to process encrypted data directly without decryption. In this paper, we propose two novel encryption algorithms for MPEG-4 FGS that meet these requirements. The first algorithm encrypts an FGS stream (containing both the base and the enhancement layers) into a single access layer and preserves the original fine granularity scalability and error resilience performance in an encrypted stream. The second algorithm encrypts an FGS stream into multiple quality layers divided according to either peak signal-to-noise ratio (PSNR) or bit rates, with lower quality layers being accessible and reusable by a higher quality layer of the same type, but not vice versa. Both PSNR and bit-rate layers are supported simultaneously so a layer of either type can be selected on the fly without decryption. The base layer for the second algorithm may be unencrypted to allow free view of the content at low-quality or content-based search of a video database without decryption. Both algorithms are fast, error-resilient, and have negligible compression overhead. The same approach can be applied to other scalable multimedia formats.; Computer Science, Information Systems; Computer Science, Software Engineering; Telecommunications; SCI(E); EI; 22; ARTICLE; 2; 222-233; 7
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/401451]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zhu, BB,Yuan, C,Wang, YD,et al. Scalable protection for MPEG-4 fine granularity scalability[J]. ieee transactions on multimedia,2005.
APA	Zhu, BB,Yuan, C,Wang, YD,&Li, SP.(2005).Scalable protection for MPEG-4 fine granularity scalability.ieee transactions on multimedia.
MLA	Zhu, BB,et al."Scalable protection for MPEG-4 fine granularity scalability".ieee transactions on multimedia (2005).