Hitachi, Ltd.

Chiyo Ono

Hiroo Okamoto

Kenji Wada

For achieving the protection of copyright, by suppressing illegal copy production thereof, in particular, when transmitting contents with using a wired or wireless LAN, as well as, for preventing the transmission of contents from deviating from a range of a personal use thereof, a contents transmitter apparatus and a contents receiver apparatus make an authentication, mutually, before transmitting contents therebetween. At the time when conducting this authentication, measurement is made upon a time-period up to arrival of a receipt confirmation responding to the transmission of an authentication request or a response to the authentication; then, only in the case when this value measured does not exceed a predetermined upper value, the transmission is conducted on the contents encrypted, and at the same time, address information and equipment information unique to the apparatus are registered, thereby conducting the transmission of encrypted contents, but without conducting the time-measurement thereon, when transmitting the contents, again. Also, while conducting the time-measurement periodically, dynamic management is made on the registration information, so that the contents thereof are suitable for the network structure at the present.

Contents transmitter apparatus, contents receiver apparatus and contents transmitting method

A broadcast receiving device configured to receive broadcasted digital programs includes a tuner to select a channel from a plurality of channels, so that a desired digital program may be received via the selected channel; a recording component to record the received program and copy control information associated with the received program; a digital terminal to output the program recorded on the recording component to a video recording device coupled to the digital terminal; and a controller to control the output of the recorded program to the video recording device that is coupled to the digital terminal. The recorded program is not output via the digital terminal if more than one video recording device is coupled to the digital terminal and if the copy control information of the recorded program imposes restriction on copying of the recorded program.

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Fujisawa, Japan

Chiyo Ono