| 摘要 |
<p>When Viterbi decoding of input signal is executed, the errors in the decoded signal must be counted. By conventional methods in which decoded signal is recorded and compared with the inputted signal to count the errors, it is impossible to count exactly the errors if some errors are produced in rerecording the input signal which contains a great number of errors. In order to solve this problem, the pathmetric value calculated during the Viterbi decoding, and then, this value is output as the number of errors. Two decoding devices each of which reads the pathmeteric value and output this value as the number of errors are provided for voice signals and FACCH signals, respectively. A signal is inputted into these two devices, and decoded. The numbers of errors obtained respectively from them are compared. Based upon the result of this comparison, it is determined whether the inputted signal is a voice signal or an FACCH signal. <IMAGE></p> |
