Abstract: A first-aid information provision system of the example embodiments includes: an information display device that includes first capture means for capturing an iris image, code acquisition means for acquiring a code associated with the captured iris image, and code display means for displaying the acquired code; and an information output device that includes second capture means for imaging the code displayed by the information display device, first-aid information acquisition means for acquiring first-aid information about an individual associated with the iris image by using the imaged code, and first-aid information output means for outputting the first-aid information.

Abstract: Disclosed is an inverse quantization method that reverse-quantizes multiple quantized values as a set, obtaining a set of multiple inverse quantized values, said method being characterized in that the range of potential inverse quantized values for each quantized value is obtained using at least a signal other than that of the aforementioned quantized value, and in that the set of preliminary inverse quantized values for which the total variation norm is the minimum within the range of potential values for each inverse quantized value is obtained as the aforementioned set of reverse-quantized values.