DATA OUTPUT METHOD AND APPARATUS, DATA PLAYBACK METHOD AND APPARATUS, DATA RECORDING METHOD AND APPARATUS, AND DATA RECORDING AND PLAYBACK METHOD AND APPARATUS

摘要

A data output method and an apparatus thereof, a data playback method and an apparatus thereof, a data recording method and an apparatus thereof, and a data recording and playback method and an apparatus thereof are provided to insert the proper electronic watermark information by inserting different kinds of electronic watermark information according to whether playback output data is original data or duplicated data. It is judged that electronic watermark information is detected from data. When the electronic watermark information is detected, data recording operation is carried out according to the detected electronic watermark information(S13). When the electronic watermark information is not detected, the data recording operation is canceled(S17). When the electronic watermark information is detected, the detected electronic watermark information is read(S14), and data recording operation is controlled according to the read result(S15,S16).