| 摘要 |
An electronic storage device facilitates transmission or reception of multiple partial encrypted digital video has a segment of digital video content recorded on the electronic storage device as a data structure with a first set of data packets encrypted under a first encryption process so that the first set of data packets can be decrypted by a first decryption process; a second set of data packets encrypted under a second encryption process so that the second set of data packets can be decrypted under a second decryption process. The first set of video data packets and the second set of video data packets, when unencrypted, represent duplicate copies of the same video information. A third set of data packets contains unencrypted video data that is contextually contiguous to the first set of data packets and the second set of data packets. The first set of data packets together with the third set of data packets represents all video content in the segment of digital video content as does the second set of data packets together with the third set of data packets. The data structure enables the first set, the second set, and the third set of digital video content to be read out of the electronic storage device in an order that facilitates decryption of the segment of digital video content by use of a decrypter having capabilities for decryption of encrypted information under the first decryption or by use of a decrypter having capabilities for decryption of encrypted information under the second decryption process, at either a transmission facility or a receiver.
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