| 摘要 |
PROBLEM TO BE SOLVED: To provide a circuit which deciphers and decodes two discontinuous searched picture collected from the sequence of an enciphered picture, prevents a deciphered picture from being copied and avoids remarkable increase of the processing quantity of a microprocessor. SOLUTION: The circuit for decoding first and second discontinuous searched pictures to be acquired from the sequence of encoded pictures partitioned by a picture starting cord includes a processor 5 which divides the sequence into plural ciphered data packets, selects the data packet including data on the searched picture and marks the head of the last enciphered data packet including data on a first searched picture, and a filtering circuit 11 which deletes deciphered data following the picture start code in the data packet having a mark header, deletes deciphered data preceding the picture start code in the next selected data/packet and is arranged on the output side of the deciphering device 7. |
