<p>An apparatus (213) and corresponding methods (FIG. 7) to facilitate maintaining crypto synchronization while processing communication signals in a communication unit includes a vocoder (215) configured to convert input audio band signals to vocoder output frames; a crypto processor (217) configured to encrypt the vocoder output frames to provide encrypted output frames; and a synchronizer (219) configured to substitute in a predetermined manner synchronization information corresponding to an encryption state of the crypto processor for a portion of the encrypted data in a portion of the encrypted output frames to provide resultant output synchronization frames suitable for synchronizing a decryption process at a target communication unit.</p>
申请公布号
WO2006039001(A2)
申请公布日期
2006.04.13
申请号
WO2005US29688
申请日期
2005.08.23
申请人
MOTOROLA, INC.;RAINBOLT, BRADLEY, J.;BOILLOT, MARC, A.