A DCT-based MPEG-2 transparent scrambling algorithm

被引：36

作者：

Wang, C ^{[1
]}

Yu, HB ^{[1
]}

Zheng, M ^{[1
]}

机构：

[1] Shanghai Jiao Tong Univ, Inst Image Commun & Informat Proc, Shanghai 200030, Peoples R China

来源：

IEEE TRANSACTIONS ON CONSUMER ELECTRONICS | 2003年 / 49卷 / 04期

关键词：

MPEG-2; video; transparent scrambling; DCT domain;

D O I：

10.1109/TCE.2003.1261218

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Recently, several encryption algorithms have been proposed, which are applied to MPEG-2 video streams. These algorithms try to optimize the encryption process and improve encryption speed by exploiting the spatial and temporal properties of video retrieval and display process. As a new branch of encryption, transparent scrambling has its own merits and special prospects. A new transparent scrambling algorithm proposed in this paper performs an arbitrarily degraded view of decoded picture by encrypting in DCT domain. This technique is applicable to the broadcast systems such as DVB/ATSC, which use MPEG-2 as compression standard(1).

引用

页码：1208 / 1213

页数：6