Patent ID: 8688437
Filing Date: 2014-04-01
Classification: G10L

Abstract:
1. A method of improving packet loss concealment for speech coding within an encoder while still profiting from a pitch prediction or Long-Term Prediction (LTP), the method comprising: having an LTP excitation component; having a second excitation component; determining with a processor of the encoder an initial energy of the LTP excitation component for every subframe within a frame of speech signal by using a regular method of minimizing a coding error or a weighted coding error at the encoder; reducing or limiting the energy of the LTP excitation component to be smaller than the initial energy of the LTP excitation component for the first subframe within the frame; keeping the energy of the LTP excitation component to be equal to the initial energy of the LTP excitation component for any other subframe rather than the first subframe within the frame; encoding the energy of the LTP excitation component for every subframe of the frame at the encoder; and forming an excitation by including the LTP excitation component and the second excitation component.