Canon Kabushiki Kaisha

Yutaka Ui

Kazuki Takemoto

Hiroichi Yamaguchi

A communication apparatus capable of wireless communication with another communication apparatus via a first communication path and a second communication path sets a directivity of an antenna to a first directivity capable of wireless communication via the first communication path and receives data from the another communication apparatus via the first communication path. When the communication apparatus sends an acknowledgement signal to the another communication apparatus via the first communication path in response to reception of the data, the communication apparatus sets the directivity of the antenna to a second directivity capable of wireless communication via the first communication path and wireless communication via the second communication path for a set period thereafter.

Communication apparatus, control method, and program

To provide a technique capable of reducing the transmission delay of an image, a communication apparatus wirelessly communicable with another communication apparatus, receives a compressed captured image from the other communication apparatus; decompresses the compressed captured image to obtain a decompressed captured image; generates, based on the decompressed captured image, a CG image to be superimposed and displayed on the captured image; and compresses the CG image to generate a compressed CG image; transmits the compressed CG image to the other communication apparatus. Then, the communication apparatus derives a delay time based on a transmission time of the compressed captured image in the other communication apparatus and a generation completion time of the CG image; and changes a compression ratio of the CG image based on whether the delay time is longer than a predetermined threshold.

Communication apparatus for controlling image compression and control method therefor

A communication apparatus with a directional antenna, determines, for each of receivers, transmitter antenna directivities with each of which it is possible to transmit a test signal to the receiver as a partner receiver with a main lobe; determines, as a monitor receiver, for each of the determined directivities, if the test signal is transmitted with the directivity, a receiver capable of receiving the test signal by a side lobe appended to the main lobe; decides, based on reception quality in the partner receiver by the main lobe and reception quality in the monitor receiver by the side lobe, a transmitter antenna directivity, and a partner receiver and monitor receiver as reception targets of the data out of the receivers; and transmits the data to the decided partner receiver and monitor receiver with the decided directivity.

Growing community of inventors

Chiba, Japan

Yutaka Ui