在这项工作中，我们对待这个问题的恢复正确的消息，如果额外的位（假报警）已加入的消息体中，在随机的位置。这的情况是常见的一些是与选择性嵌入水印系统

典型的当人类视觉系统（或录音）注册成立，以提高质量水印系统。我们提出一个有效的解码方案

使用一些修改的“维特比算法的代码。添加额外的状态表示可能的误报率和一个新的扩展算法的改进网格提出图。仿真结果表明，我们的算法在高效率的检测随机的误报率很高。-In this work, we treat the problem of recovering the correct message if

extra bits (false alarms) are added to the body of the message at random locations. This

situation is common for some watermarking systems with selective embedding which is

typical when the human visual (or audio) system is incorporated to enhance the quality of

the watermarking system. We propose an efficient decoding scheme for convolutional

codes using some modifications of‘ the Viterbi algorithm. Extra states are added to

represent the possible false alarms and a new expansion algorithm of the modified trellis

diagram is proposed. The simulation results show the high efficiency of our algorithm in

detecting random false alarms with high rates.