System for processing an information signal

Details System for processing an information signal System for processing an information signal

2006-05-23

2006-05-23

Zand, Kambiz (Department: 2132)

Cryptography

Communication system using cryptography

Having compression

C380S210000, C380S217000

Reexamination Certificate

active

07050588

ABSTRACT:
A system for processing an information signal comprises a system (1) for scrambling the information signal and at least one system (2) for descrambling the scrambled information signal. The scrambling system (1) comprises means (3,6) for analysing the entropy distribution of the information signal, means (5,6,7,9) for scrambling the information signal in dependence on the entropy distribution of the information signal to provide a scrambled information signal having an entropy distribution corresponding with the entropy distribution of the information signal and means (11) for compressing the scrambled information signal. The descrambling system (2) comprises means (14) for decompressing the compressed scrambled information signal and means (16,19,21,22,24) for descrambling the scrambled information signal to provide the information signal.

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Tang, Lei, “Methods for Encrypting and Decrypting MPEG Video Data Efficiently,” GSIA Carnegie Mellon University, Nov. 18, 1996. 11 pages.
Rao, K. R., et al., “Techniques and Standards for Image, Video, and Audio Coding”,Kunsan National University Republic of Korea, (1996), pp. 395-396.

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