| 摘要 |
Various quality versions of an electronic content are defined, and one or more distortion algorithms (22, 32) that are executable to generate a lower quality version of the electronic content by a distortion of the highest quality version (21, 31) are defined. Each quality version is selectively assigned a content key (CK) whereby an electronic content player (34, 70) will have the appropriate information when decrypting, decoding, and/or distorting the highest quality version (21, 31) of the electronic content. |
