Hitachi, Ltd.

Yusuke Sato

Makoto Iwayama

Hisashi Ikeda

Naohiro Furukawa

Makoto Kumada

Yoshie Yamaguchi

Masahito Hirokawa

Masayuki Ono

A device for recording positions within an electronic document and capable of recreating those recorded positions afterwards even if the electronic document has been changed to some extent. An index data creation unit in an information terminal creates index information for a page to display from the electronic document, and records it along with time information in an index database. When a time is specified, the index data search unit searches the index database for index information recorded near that time, and identifies the page position of that electronic document from the searched index information. A data display unit displays the beginning of the electronic document at the identified position. The information terminal is capable of managing information by linking electronic data from handwritten information written on paper with a digital pen, with the display page the electronic document by utilizing a stroke set database and a pen data processor.

Device, a program and a system for managing electronic documents

A method for DTMF transmission between different address systems in a communication system containing a first network (NW)A including an SIP terminalA connected to an SIP serverA, a second network (NW)B including an SIP terminalB connected to an SIP serverB, and an SIP converterconnecting the first and the second NWs. When the SIP converterdetects coded DTMF information from one of the NWs while a session is established between the SIP terminalA and the SIP terminalB, the SIP converterdetermines whether the other of the NWs supports the coded DTMF information. If the other of the NWs does not support the coded DTMF information, the SIP converterstores voice-data DTMF corresponding to the coded DTMF information into a payload of RTP and transfers the information to the SIP terminal of the other network.

Method for DTMF transfer by RTP

Growing community of inventors

Hachioji, Japan

Yusuke Sato