The present invention improves confidentiality of video without incurring increased processing load. Coefficient scanner 123 scans the orthogonal transform coefficients of the base layer in scanning orders specified by scanning order determiner 150. Coefficient scanner 133 scans the orthogonal transform coefficients of the enhancement layer in scanning orders specified by scanning order determiner 150. When scanning is implemented in a privacy mode, scanning order determiner 150 determines the privacy mode scanning orders of the base layer and the enhancement layer individually and generates scan lists that indicate the scanning orders of the base layer and the enhancement layer respectively. Scan list transmitter 180 the scan lists of the base layer and the enhancement layer, generated in scanning order determiner 150, to specific users alone.