Data copying system and method, data reading apparatus, data writing apparatus and data recording medium.

数据拷贝系统及方法，数据读取设备，数据写设备及数据记录介质。

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The present invention provides remarkably improved availability in a data recording method and apparatus, a data recording medium, and a data reproducing method and apparatus.

本发明在数据记录方法和设备、数据记录介质、以及数据再 生方法和设备等方面的使用价值，提供了显著的改进。

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Data communication system, information processing device and method, recording medium and program.

数据通信系统，信息处理设备和方法，记录媒体和程序。

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