This invention will apply to large capacity digital image memory of digital hard diskrecorder, digital tape recorder and opticaldiskrecorder 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。
2
Opticaldisk, opticalrecorder, optical producing device, encrypted communication system, and authorizing system for use of program.