Kabushiki Kaisha Toshiba

Koji Kanazawa

Takeshi Saito

Yoshimichi Tanizawa

Hiroshi Isozaki

Sachiko Yasukawa

Takashi Kokubo

Masafumi Tamura

Keisuke Mera

Hideaki Nakakita

Katsuyuki Kimura

Ken Matsushita

In a system for reproducing AV information from a recording medium, such as a DVD, not only are usual titles reproduced, but also related information relevant to specific stream information is acquired easily by making use of resources on a computer network. In a reproducing system with the function of reproducing the title information recorded on a DVD and displaying it on the screen of a display section, when the user clicks a Web mark on the screen, the CPU links to a Web server on the Internet via a modem and accesses the Web page related to the stream information on the screen. At that time, the related Web page is the selected information conforming to parental information, or attribute information, set in the system.

AV information reproducing system and a reproducing method applied to the same system

An AV communication control circuit suitable for a radio LAN-LSI in a radio AV transmission/reception device is formed by a copyright protection processing unit configured to carry out a copyright protection processing with respect to AV data entered from an AV stream signal line, a selection unit configured to select either one of AV data entered from an AV stream signal line through the copyright protection processing unit and AV data entered from a general purpose bus, and a transmission control unit configured to carry out control for transmitting AV data selected by the selection unit to a network.

AV communication control circuit for realizing copyright protection with respect to radio LAN

An information processing apparatus has an authentication/key exchange unit, a round trip time measuring unit, a common key transmitter, a contents key transmitter and a contents transmitter. The round trip time measuring unit sends a round trip time measuring request generated to the communication apparatus through the first communication connection to measure the round trip time, and check whether the measured round trip time is within a predetermined time and whether a transmitting source of the round trip request response is the communication apparatus sharing the first key. The common key transmitter encrypts a second key used for contents transmission by using the first key and transmits the encrypted second key through the first communication connection when the round trip time measuring unit succeeds in the checking. The contents transmitter encrypts the contents requested by the communication apparatus by using the second key and sends the encrypted contents to the communication apparatus through the second communication connection.

Information processing apparatus, information processing method, and information processing program

A recording and reproducing apparatus includes a file recorder, an interface, and controller which, upon receipt of content file with copy control information, records the content file in the recorder by adding thereto identification information M requesting transfer upon confirmation that a round-trip response time to a destination is not longer than a predetermined time, so that upon receipt of an instruction for transfer of the content file to an external device on the network, the controller determines whether the external device has a function of measuring and determining the round-trip response time to the destination, and in the case where the external device has function of measuring and determining the round-trip response time to the destination, transfers the content file to storage area of the external device, after measuring the round-trip response time and confirming that the measurement is not longer than predetermined time.

Recording and reproducing apparatus and file transfer method

An AV communication control circuit suitable for a radio LAN-LSI in a radio AV transmission/reception device is formed by a copyright protection processing unit configured to carry out a copyright protection processing with respect to AV data entered from an AV stream signal line, a selection unit configured to select either one of AV data entered from an AV stream signal line and AV data entered from a general purpose bus, and a transmission control unit configured to carry out control for transmitting AV data selected by the selection unit to a network.

An electronic apparatus includes a communication device that communicates with a mobile device and a plurality of devices via a network. The mobile device is wirelessly connectable to the network. The electronic apparatus further includes a control unit configured to determine whether the mobile device is disconnected from the network, and a message sending unit configured to send an alarm message to one of the devices by communication between the one of the devices and the communication device when the mobile device is disconnected from the network, the one of the devices being currently powered on.

Growing community of inventors

Tokyo, Japan

Koji Kanazawa