| 摘要 |
A device ( 3400 ) for processing an encrypted data stream ( 3401 ), wherein the device ( 3400 ) comprises a decrypting unit ( 3402 ) for generating a decrypted data stream ( 3403 ) from the encrypted data stream ( 3401 ), a detecting unit ( 3404 ) for detecting position information of at least one intra-coded frame in the decrypted data stream ( 3403 ), and a replacement unit ( 3405 ) for replacing, based on the detected position information, portions of the encrypted data stream ( 3401 ) by corresponding portions of the decrypted data stream ( 3403 ). |
