Sanyo Electric Co., Ltd.

Hideo Hirono

Hironobu Takahashi

Kazuaki Okamoto

A technology for efficiently processing data communication using a plurality of communications protocols is provided. In the Internet phone apparatus, when a network interface section receives packets, a protocol detecting section determines whether the received packets are TCP packets or UDP packets. In the case TCP packets, a CPU, a general-purpose circuit, processes the packets using software. In the case of UDP packets, a UDP processing section, a dedicated circuit, processes the packets. Audio data transmitted and received in UDP packets are decoded by a codec processing section and output to a speaker.

Communication apparatus and applications thereof

A checkered characteristic pattern is picked up by an image input device to form pick-up data. Characterizing points (intersecting points) are detected from the pick-up data. From the arrangement of the characterizing points about the center of the pattern and the positions of the characterizing points on the picture plane, a mapping function obtained when a TV camera is assumed to be a pin-hole camera is prepared. Reference positions of the characterizing points through the entire picture plane are calculated from the mapping function. The reference positions are compared with the actual positions on the picture plane to calculate a correcting function which in turn is stored in a correcting function preparing device. Normally, the inputted image is corrected by the correcting function and then outputted to an image output device.

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Moriguchi, Japan

Hideo Hirono