Patent ID: 7433488

Claim:
An information recording medium drive device for reading data from an information recording medium and outputting the read data to an information processing apparatus, the information recording medium drive device comprising: a replay unit for replaying the data comprising audio and/or video content from the information recording medium; a data input and output unit that outputs the replayed data to the information processing apparatus while receiving processed replayed data from the information processing apparatus, wherein the processed replayed data is data that has been read from the information recording medium by the information recording medium drive device, received by the information processing apparatus from the information recording medium drive device and processed in a predetermined process in the information processing apparatus, and wherein the predetermined process comprises at least one of decrypting, decoding and decompressing the replayed data; an electronic watermark detector located within the information recording medium drive device for performing an electronic watermark detection process on the processed replayed data; and a controller that controls data outputting of the replayed data to the information processing apparatus by the data input and output unit based on a result of the electronic watermark detection process on the processed replayed data of the electronic watermark detector; wherein the data outputting to the information processing apparatus and inputting of the processed replayed data supplied from the information processing apparatus are performed using a common signal path, and wherein the controller continues or quits the data outputting to the information processing apparatus based on the result of the electronic watermark detection process on the processed data.