| 摘要 |
<p>A pitch period of a signal is estimated by identifying a peak candidate of the signal as a peak and estimating the pitch period of the signal based on a time difference between the identified peak and a previous peak of the signal. An error-concealment apparatus (202) includes a history block (204) for storing signal data input to a decoder, an error likelihood detector, and a pitch period estimator. The error likelihood detector (208) directs an input of the decoder to data of the signal data in the history block offset an estimated signal pitch period back in time responsive to a determination that data from a receiver has been lost or corrupted. The pitch period estimator (206) estimates the pitch period of the signal via identification of peaks of the signal data.</p> |
