| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a technology capable of protecting audio signals transmitted on the HD-SDI stipulated by the SMPTE 292M in compliance with the SMPTE 292M. <P>SOLUTION: When audio signals have a packet structure of, e.g. Audio Data Packet stipulated in the SMPTE 292M, an encryption apparatus applies encryption to respective bits 7 to bits 0 of UDW 2 to UDW 17 of the Audio Data Packet, recalculates the Even Parity from respective encryption results and allocates inverse of bits 8 to respective bits 8. Further, the encryption apparatus inhibits encryption of the other data, that is, data ADF, DID, DBN, DC, CLK, ECC, CS. The technology above can be applied to systems each transmitting HD-SDI signals. <P>COPYRIGHT: (C)2008,JPO&INPIT |
