Sharp Kabushiki Kaisha Corporation

Hiroyuki Nakaoka

Hiroshi Uno

Yoshihiro Ohtani

Toru Ueda

Satoshi Terada

Takuya Kinoshita

Yutaka Ikeda

Tsukasa Kaminokado

Ryota Yagi

Makoto Nakamura

Takashi Nakajima

Yoshihiro Otani

An information server apparatusincludes a communication portionreceiving a request for getting information including a set of information source specifying information and time specifying information from a client, a user request information analyzing portionand a table reference portionanalyzing the request for getting information and selecting information to be transmitted to the client terminal apparatus based on the result of analysis. Further, communication portionreturns the selected information to the client.

Information server apparatus, client terminal apparatus, sub-client apparatus, information processing method and storage medium having stored program therefor

A digital optical transmission apparatus includes a modulation portion for modulating data to be transmitted in an ASK modulation method, and an E/O modulation portion for converting an electrical signal output from the modulation portion into an optical signal having a base band component with a constant DC level. DC-biased or FSK-biased may be employed as a method of making constant the DC level of the base band component.

Digital optical transmission apparatus and method for performing ASK modulation to generate base band component with constant DC level

A digital optical transmitter includes a main/subdata modulation part for distorting a main data modulated signal waveform in response to sub-data, and an E/O conversion part for converting a subsequently obtained electrical modulated signal to an optical modulated signal and outputting the optical modulated signal. A digital optical receiver includes an O/E conversion part for receiving the optical modulated signal, converting it to an electrical modulated signal, and outputting the electrical modulated signal. Additionally, the digital optical receiver further includes a main/subdata demodulation part for demodulating the main data from the electrical modulated signal, while detecting whether or not a distortion signal responsive to the subdata is superposed on a subcarrier which forms the electrical modulated signal. If the distortion signal is superposed on a subcarrier, the main/subdata demodulator part demodulates the associated subdata.

Digital optical transmitter and digital optical receiver making communication by superposing subdata on modulated waveform of main data

A peripheral device operating with power supplied from a host device includes a receive unit receiving an external signal and a controller. The controller causes at least one of the functions of the peripheral device to operate intermittently when the host device is in a sleep mode. Further, upon reception of the external signal via the receive unit, the controller forces the host device to shift to an active mode based on the signal received. As at least one of the functions of the peripheral device is forced to operate intermittently when the host device is in the sleep mode, the consumption of the power supplied from the host device is reduced.

Peripheral device for reducing power supplied from a host device and control method thereof

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Tenri, Japan

Hiroyuki Nakaoka