Patent ID: 8712763
Filing Date: 2014-04-29
Classification: G10L,H04N

Abstract:
1. A signal encoding method, comprising: converting a first-domain signal into a second-domain signal; performing a Linear Prediction (LP) processing and a Long-Term Prediction (LTP) processing for the second-domain signal to obtain a LP processing result and a LTP processing result, wherein the LP processing result comprises a LP signal and a LP residual signal, and the LTP processing result comprises a LTP residual signal, a best pitch of the LP residual signal or both the best pitch of the LP residual signal and a pitch gain of the LP residual signal; obtaining a long-term flag value based on a comparison between the LP residual signal and the LTP residual signal; if the long-term flag value is a first value, obtaining a second-domain predictive signal based on the LP processing result and the LTP processing result, or, if the long-term flag value is a second value, obtaining the second-domain predictive signal based on the LP processing result; converting the second-domain predictive signal into a first-domain predictive signal, and calculating a first-domain predictive residual signal; and outputting a bit stream that comprises the first-domain predictive residual signal.