Kddi Corporation

Keio University

Takaaki Ishida

Hiroaki Kimura

Shingo Izawa

Kotaro Kataoka

Jun Murai

A transmitting side () transmits broadcast content () through a communication network () or a broadcast network (). Transmission through the communication network () involves an addition of an IP header () to the broadcast content () for packetization as an IP packet () and transmission to a terminal device () on a receiving side (). Transmission through the broadcast network () involves encapsulation of the IP packet into a given transmission packet () used with a digital broadcast signal for transmission to the terminal device on the receiving side ().

Broadcast-content transmission apparatus, and broadcast-content transmission method

An information communication apparatus (A) that receives transmission information transmitted from a broadcast station, generates and relays response information to an information communication apparatus (C) having access to a communication network () includes: a broadcast-wave I/F that receives the transmission information; a wireless I/F that transmits the response information to the information communication apparatus (C) capable of wireless communication to relay the response information to an area having access to the communication network (); a communication network I/F that is connected to the communication network () and transmits the response information; a response-transmission-information generating unit that generates the response information; and a connection control unit that determines whether the communication network () is accessible, transmits the response information to the communication network () when accessible, and relays the response information to the connectable information communication apparatus (B) when inaccessible.

Information communication apparatus, information transmitting apparatus, and information communication method

A relay apparatus () includes a communication I/F () that receives an IP packet from a source terminal (A) via a communication network (), a broadcast wave interface () that transmits the IP packet received via the communication network I/F () to a destination terminal (B) by a digital broadcast wave, and a receiving and transmitting unit () that transmits the IP packet that is received by the communication I/F () and transmitted by the transmitting communication terminal (A) to the destination terminal (B) via the broadcast wave I/F ().

Relay apparatus, communication terminal, and communication method

A content transmitting apparatus includes a content transmitting unit () that IP packetizes content to be transmitted through a communication network (), and an encapsulating unit () that encapsulates the content IP packetized by the content transmitting unit () to generate a transmission packet to be transmitted through a broadcast network () for digital broadcast media. The content transmitting unit () and the encapsulating unit () transmit plural content items by IP multicast. The content transmitting unit () adds, to a header of the content to be IP packetized, information concerning a condition of a receiving side node of the content.

Growing community of inventors

Fujisawa, Japan

Takaaki Ishida