This invention will apply to large capacity digital image memory of digital hard disk recorder, digital tape recorder and optical disk recorder and the like.
本发明应用于大容量的数字图像存储的数字硬盘录像机，数字磁带录像机及光盘录像机等装置。
Optical disk, optical recorder, optical producing device, encrypted communication system, and authorizing system for use of program.
光盘，光记录装置，光重放装置，保密通信方式或程序使用许可方式。
Optical disk, optical recorder, optical producing device, encrypted communication system, and authorizing system for use of program.
光盘，光记录装置，光重放装置，保密通信方式或程序使用许可方式。
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