Abstract: A radio device for transmitting or receiving desired information through an MIMO transmission line, and an electronic device and an imaging device which have the radio device and supplied with drive power together with the radio device may realize to implement a desired radio transmission flexibly in the form suitable for the battery residual amount and power consumption, in which plural antenna sections for performing radio communication by a spatial division multiplexing method on an MIMO transmission line, and a controller for increasing or decreasing the number of the antenna portions used for the radio transmission.

Abstract: A radio device for transmitting or receiving desired information through an MIMO transmission line, and an electronic device and an imaging device which have the radio device and supplied with drive power together with the radio device may realize to implement a desired radio transmission flexibly in the form suitable for the battery residual amount and power consumption, in which plural antenna sections for performing radio communication by a spatial division multiplexing method on an MIMO transmission line, and a controller for increasing or decreasing the number of the antenna portions used for the radio transmission.

Abstract: A recursive noise reduction device which has adaptability with respect to changes in input image data which are not noise, resulting from, e.g., scene changes and subject movement, and in which a rise in the black level and a drop in the white level does not occur. The recursive noise reduction device includes a storage unit which stores image signals in field or frame units, and a computation unit which multiplies by an input image signal A by K (0<K<1), and multiplies by (1-K) an image signal B from a previous recursive calculation, which is output from the storage unit. The computation unit adds the input image signal A, which has been multiplied by K, to the signal B, which has been multiplied by (1-K), and the computation results are stored in the storage unit. A comparison device compares the signal A with the signal B.