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Motion picture data encrypting method and computer system and motion picture data encoding/decoding apparatus to which encrypting method is applied
Motion picture data encrypting method and computer system and motion picture data encoding/decoding apparatus to which encrypting method is applied
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机译:运动图像数据加密方法以及应用了该加密方法的计算机系统和运动图像数据编码/解码设备
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摘要
Of I, P, and B pictures contained in an MPEG 2 data stream, only the I picture is subjected to encryption such as scramble processing. Scramble rule data used at that time is stored in the lead-in area of an optical disk. A software DVD decoder reads the scramble rule data stored in the lead-in area, and its certification control module descrambles only the I picture. With this processing, the CPU power required for descramble processing can be reduced, and motion picture data can be decoded by the software DVD decoder in real time.
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