System and method for video stream encryption

Details System and method for video stream encryption System and method for video stream encryption

2008-01-08

2008-01-08

Zand, Kambiz (Department: 2132)

Cryptography

Communication system using cryptography

Circuit switched network

C380S254000, C380S270000

Reexamination Certificate

active

07317796

ABSTRACT:
A system and method of video stream encryption. A storage device stores a first quantization scale and a second quantization scale. An encryption application receives video data, a first quantization scale and a second quantization scale, generating quantized data by dividing the video into the first quantization scale, generating supplementary data by subtracting the quantized data multiplied by the first quantization scale from the video data, generating quantized supplementary data by dividing the supplementary data into the second quantization scale, and generating encrypted quantized supplementary data using variable length encoding and symmetrical/asymmetrical encryption algorithm.

REFERENCES:
patent: 6957350 (2005-10-01), Demos
patent: 2002/0054639 (2002-05-01), Kawashima et al.
patent: 2003/0053702 (2003-03-01), Hu

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