Canon Kabushiki Kaisha

Eiji Imaeda

Makoto Chida

Ichiro Kato

An operator is prevented from accidently operating a communication apparatus during short range communication, even if there is an incoming call/mail. A communication apparatus has at least a first communication unit that performs wireless communication for a call or a mail, and a second communication unit that is different from the first communication unit. The communication apparatus changes a notification function that notifies a user of an incoming call/mail received by the first communication unit to a prohibited status in accordance with a start of communication by the second communication unit, and cancels the prohibited status of the notification function in accordance with an end of communication by the second communication unit.

Communication apparatus and method for controlling the same

An operator is prevented from accidentally operating a communication apparatus during short range communication, even if there is an incoming call/mail. A communication apparatus has at least a first communication unit that performs wireless communication for a call or a mail, and a second communication unit that is different from the first communication unit. The communication apparatus changes a notification function that notifies a user of an incoming call/mail received by the first communication unit to a prohibited status in accordance with a start of communication by the second communication unit, and cancels the prohibited status of the notification function in accordance with an end of communication by the second communication unit.

A method and apparatus for communicating between devices by selectively using a plurality of communication methods including a centralized control method, in which each communication apparatus sends and receives data under control of a control apparatus, and a distributed control method, in which each communication apparatus sends and receives data in an autonomous and distributing manner. The method and apparatus include detecting radio frequency interference, and switching between the centralized control method and the distributed control method according to a result of detecting the radio frequency interference.

Communication method, communication apparatus, and computer program

A communication control apparatus that performs wireless communication with a plurality of communication apparatuses, the communication control apparatus comprises: a grouping unit adapted to group the plurality of communication apparatuses based on the relative positions of each of the plurality of communication apparatuses; a notification unit adapted to notify each of the plurality of communication apparatuses of the group to which that communication apparatus belongs and of a communication slot allocated to that group; and a transmission unit adapted to transmit transmission data at a predetermined timing.

Control apparatus to divide other communication apparatuses into multiple groups for slot allocated communication

A relayed communication system including a supervising station and a plurality of communication stations, transmits data from the supervising station to the communication stations by relay transmission. Each of the plurality of communication stations determines the quality of communication with the supervising station, and notifies the determined communication quality to the supervising station. If the communication quality is equal to or greater than a predetermined value, the supervising station allocates one or more communication stations as relay stations to respective time slots in descending order of the communication quality, and transmits the allocation result to the plurality of communication stations. As a result, each communication station can perform relayed communication using the time slot that is allocated thereto.

Communication apparatus and relayed communication system and control method thereof

The invention includes a wireless communication system including a control station which transmits a wireless signal by one of a plurality of schemes, and a terminal station which receives the transmitted wireless signal using a plurality of directional antennas by one of a plurality of schemes. The control station repeatedly transmits a wireless signal while sequentially switching the plurality of schemes. The terminal station switches the plurality of schemes at a cycle different from the switching cycle of the control station, changes the directivity direction of the directional antenna every time the terminal station receives all wireless signals transmitted by the plurality of schemes, and detects the reception state of each of the wireless signals which have been transmitted by the plurality of schemes and received in the directivity directions of the directional antenna.

Wireless communication system, terminal station, and wireless communication method

A memory card is provided with a memory interface and a wireless communication unit, which makes a connection with a data storage device provided in a remote place through a wireless line, and transfers data to the data storage device. A memory space of a database server in a remote place looks as if it exists in the memory card. In addition, a capacity of the database server can be set arbitrarily from a cellular phone.

Management method for service for storing data from memory card in external storage device and system for carrying out the service

A communication device having a memory for storing image data and thumbnail data is capable of transmitting the image data to an image storage unit. When the communication device transmits some of the image data stored in the memory, it erases the transmitted image data in the memory to increase an area in the memory where data can be stored. The communication device transmits to the image storage unit a search request for searching for the image data corresponding to the selected thumbnail data during browsing of the thumbnail data, and receives the image data found by searching from the image storage unit.

Remote system for image storage and search

This invention proposes to eliminate the limitation that the reception data, assigned to a subchannel, cannot be re-assigned to another subchannel in the transmission. For this purpose, in a configuration of the present invention, the transmission information, formed by multiplexing information of plural kinds in a multiplexing unit, is transmitted to a line control unit which is connected to a communication line and serves to transmit and receive information to and from different locations, while the reception information received from the communication line is received by the line control unit and separated in a demultiplexing unit into the information of respective kinds, and at least one is selected by an entire control unit from thus separated plural information and is turned back to the multiplexing unit through a turn-back bus.

Communication apparatus and communication method using dummy data

At the start of a communication, a video and audio output other than the communication is automatically turned off. When a handset is off-hooked or the operation to start the communication is performed by an operation apparatus, a communication control circuit switches a change-over switch to an a contact and turns off a disconnecting switch. When the handset is on-hooked or the operation to finish the communication is executed by the operation apparatus, the communication control circuit switches the change-over switch to a b contact and turns on the disconnecting switch.

Apparatus and method for suspending a reproduction operation reproducing

A communication terminal apparatus for multiplexing a plurality of different types of data and for performing communications using the multiplexed data includes a network control unit connected to a communication network for transmission and reception of the plurality of different types of data. A multiplexing unit generates transmission data by multiplexing the plurality of different types of data and outputs the transmission data to the line control unit. A synchronizing unit generates a transmission synchronizing signal of the multiplexing unit. A separating unit separates reception data received from the network control unit in units of data type synchronously with the transmission synchronizing signal generated by the synchronization unit. A loop back path can be used for looping back and inputting the separated reception data to the multiplexing unit, and an adding unit adds dummy data to the looped back reception data.

Communication terminal apparatus

A television telephone apparatus automatically commences response communication in response to a call received, so as to transmit a response message to the caller. The apparatus has a memory for storing image message and voice message transmitted from the caller. The apparatus also has an image encoding unit which forms an image frame update request signal for updating the encoding mode, and a communication control unit for transmitting the request signal to the caller. The apparatus further has an image decoding unit which determines the mode in which the received image has been encoded and, when the encoding mode of the received image has been set to a predetermined intra-frame mode after the transmission of the image frame update request signal, a received image frame memory stores the received image data for display. This arrangement ensures that a received image of good image quality can be displayed. The quality of the displayed image can further be improved when the amount of .gamma.-correction performed at the caller side is determined in conformity with the .gamma. characteristic of the receiving side.

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Kawasaki, Japan

Eiji Imaeda