Patent ID: 8515744
Filing Date: 2013-08-20
Classification: G10L,H04N

Abstract:
1. A signal encoding method, comprising: converting a first-domain signal into a second-domain signal, wherein the first-domain signal is a nonlinear domain signal, and the second-domain signal is a Pulse Code Modulation (PCM) 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; obtaining a long-term flag value according to a decision criterion, wherein the decision criterion is a comparison of the LP processing result and the LTP processing result; if the long-term flag value is a first value, obtaining a second-domain predictive signal according to the LP processing result and the LTP processing result, and, if the long-term flag value is a second value, obtaining a second-domain predictive signal according to 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.