NEC

About: NEC is a company organization based out in Tokyo, Japan. It is known for research contribution in the topics: Signal & Layer (electronics). The organization has 33269 authors who have published 57670 publications receiving 835952 citations. The organization is also known as: NEC Corporation & NEC Electronics Corporation.

Mobile telephone system for determining a position of a mobile telephone

Abstract: A cordless telephone is disclosed that displays the relative position of a communication partner's cordless telephone during conversation between cordless telephones and that includes a received field level detector that measures the received field level; a memory section that inputs and stores the position at which received field level is first detected and positions subsequently detected; a control section that determines the relative position of a communication partner's cordless telephone by performing a three-point measurement based on the results of detecting received field level three times and on the resulting detected positions, and a display section that displays the measurement result.

Projection display unit

Abstract: A projection display unit, in which a distortion of an image is corrected even when the image is projected from an arbitrary direction, further which can correct a distortion caused by that an image is projected on a screen surface having an irregular surface or a free surface, is provided. The projection display unit provides an image inputting means to which an original image is inputted, a screen surface obtaining means for obtaining a three dimensional shape of a screen surface by calculating an azimuth angle, a tilt angle, and a distance of the screen surface for the projection display unit by using the normal line vector of the screen surface, an image correcting means for executing an inclination correction and a zooming in/out correction for the original image corresponding to the three dimensional shape of the screen surface, and an image outputting means for outputting the corrected image as a projecting image.

Method and apparatus for determining destination address of electronic mail (e-mail) message from stored e-mail messages

Abstract: In an electronic mail transmitting/receiving apparatus, received electronic mails are stored in a storage apparatus, and when a key word is inputted from an input apparatus, an electronic mail containing this key word is retrieved from this storage apparatus. Then, a mail address contained in the electronic mail retrieved by a retrieving unit is extracted as a mail address of a transmission destination candidate. The extracted mail address of the transmission destination candidate is outputted to an output apparatus, and a user selects as a transmission destination mail address, at least one mail address of the transmission destination candidate from the mail addresses of the transmission destination candidates outputted to this output apparatus. As a result, an electronic mail is transmitted to an apparatus having the selected transmission destination mail address.

Output control circuit for transmission power amplifying circuit

Abstract: A higher output of two outputs from a trapezoidal wave generating circuit 4 and a pulse generating circuit 5 is produced. The control voltage signal is formed by combining the trapezoidal wave signal and the pulse signal. Sharp rising and falling edges of the pulse voltage are selected for controlling the transmission power amplifying circuit 1 in a voltage range below a predetermined voltage level, whereas gentle rising and falling edges of the trapezoidal wave signal are used for controlling the circuit 1 in a voltage range above that voltage level.

Key distribution method

Abstract: A key distribution method and system for distributing a key over an insecure communication channel between first and second systems Both first and second systems generate respective random numbers, calculate key distribution codes based on that random number, public information and information secret to the respective systems, and transmits the distribution codes to the other system The same key is generated by both systems based on public information, the locally generated random number and the received key distribution codes Alternatively, the systems may exclude the secret information from the key distribution codes but generate and transmit identification codes based on the secret information, public information and the locally generated random numbers The received key distribution and identification codes are subjected to a known transformation and compared to known identification of the transmitting system