| 摘要 |
PROBLEM TO BE SOLVED: To edit contents with the copyright of the contents protected. SOLUTION: An encrypting device is provided with a detecting means for detecting a TS (transport stream) header of an unencrypted transport stream, PES (packetized elementary stream) header, sequence header, GOP (group of picture) header and sequence end code, and an encrypting means for encrypting a transport stream excluding the TS header, PES header, sequence header, GOP header, and sequence end code. An editing device is provided with: a detecting means for detecting the TS header of a transport stream, PES header, sequence header, GOP header and sequence end code; and an editing means for editing an encrypted transport stream among TS packets having one and the same PID with a TS packet from which the GOP header is detected to a TS packet preceding a TS packet with the next GOP header detected as a unit without decrypting the encrypted transport stream. COPYRIGHT: (C)2005,JPO&NCIPI |
