Panasonic Corporation

Shinichi Harigae

Kazuya Okabe

Takuma Masuda

Masashi Akita

An information processing device according to the present invention receives an operation instruction by a motion of a hand and thus performs an operation corresponding thereto. The information processing device includes a detection section for detecting the motion of the hand; and a control section for displaying information corresponding to the motion of the hand detected by the detection section on a display. When the detection first detects the hand, the control section performs one of a plurality of different processes in accordance with whether or not the detection section detects a motion of the hand within a certain time duration after the first detection of the hand.

Information processing device

A D/A converter () includes a delta-sigma modulation circuit () including a quantizer () that receives a digital signal to quantize it based on a quantization reference value, a local D/A conversion circuit () for converting an output from the delta-sigma modulating circuit to an analog signal to be outputted, and a control circuit () for correcting the quantization reference value of the quantizer. The quantization reference value is established for each of a plurality of discrete output values that the quantizer may output. The control circuit () corrects the quantization reference value to cancel any distortion that would occur in a circuit, following the delta-sigma modulation circuit () and including the local D/A conversion circuit ().

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Kyoto, Japan

Shinichi Harigae