| 摘要 |
An information storage medium is provided which includes main image information compliant with a high-image-quality system, first subsidiary image information compliant with the high-image-quality system, and second subsidiary image information compliant with a standard system. The stored information is read from the information storage medium, the main image information is down-converted into image information of the standard system, and the second subsidiary image information is superposed on the image information.
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