| 摘要 |
A method and device for updating statuses of synthesis filters are provided. The method includes: exciting a synthesis filter corresponding to a first encoding rate by using an excitation signal of the first encoding rate, outputting reconstructed signal information, and updating status information of the synthesis filter and a synthesis filter corresponding to a second encoding rate. The device includes a plurality of synthesis filters, and a status updating module adapted to synchronously update status information of the synthesis filters. In the present invention, it is allowed to use an independent synthesis filter at each encoding rate during the encoding process; and after each frame is encoded, not only the status of the synthesis filter corresponding to the current rate is updated, but also the statuses of the synthesis filters at other rates is updated. Thus, the synchronization between the statuses of the synthesis filters corresponding to different rates at the encoding terminal is realized, thereby ensuring the consistency of the reconstructed signals of the encoding and decoding terminals when the encoding rate is switched, and improving the quality of the reconstructed signal of the decoding terminal. |
